WO2016152949A1

WO2016152949A1 - Medical needle

Info

Publication number: WO2016152949A1
Application number: PCT/JP2016/059286
Authority: WO
Inventors: 仲宜子; 田畑安司; 赤池伸和; 山崎裕輔
Original assignee: テルモ株式会社
Priority date: 2015-03-24
Filing date: 2016-03-24
Publication date: 2016-09-29

Abstract

A medical needle (10) is provided with a needle body (12) that is a needle body, a hub (14), a protector (16) comprising an accommodation space (60), and a cap (24). A tip section (76) that is more elastic than the hub (14) and the cap (24) at at least the mounting location of the cap (24) is provided to the protector (16). Prior to puncturing with the needle body (12), the cap (24) is held tightly on the exterior of the tip section (76) having the hub (14) arranged on the interior thereof.

Description

Medical needle

The present invention relates to a medical needle having a structure that ensures airtightness and sterility of a space in which the needle body is disposed before the needle body is used.

In blood donation, a blood outlet is constructed by puncturing and placing a dedicated blood collection needle on a donor, and blood is stored in a blood bag connected to the blood outlet. The used blood collection needle is discarded after blood donation is completed to prevent infection. In recent years, in order to prevent a needle tip of a blood collection needle from being mistaken at the time of disposal, for example, as shown in Japanese Patent No. 3198492, a medical needle equipped with a protector that accommodates a needle body has been developed and provided.

In addition, in order to improve hygiene, this type of medical needle is sterilized with a needle body, a protector, a cap that covers the needle body, and the like assembled before providing the product. For example, high-pressure steam sterilization (autoclave sterilization) is performed on blood collection needles for whole blood (see JP-A-8-182741).

By the way, the needle body of a medical needle is a part that is directly inserted into a blood vessel, and is required to be hygienic even if it is stored for a long time before use. Therefore, the medical needle has high airtightness so that water does not adhere to the needle body during high-pressure steam sterilization and it cannot come into contact with the outside air during the product storage period (that is, steam or outside air does not reach the needle body). It is calculated | required that it is a structure which has.

The present invention has been made in view of the above circumstances, and by blocking a portion that may communicate with the space in which the needle body is arranged in an assembled state, the high-pressure steam sterilization process or the high-pressure steam sterilization process It aims at providing the medical needle which can improve the hygiene of a needle body later.

In order to achieve the above object, a medical needle according to the present invention accommodates a needle body, a needle holding section that holds the needle body, and the needle holding section in a state before puncturing the needle body. And a protector having an accommodation space for accommodating the needle body in association with relative movement in the proximal direction of the needle holding portion after puncturing, and the needle body is disposed between the needle holding portion and the protector. Is provided with a blocking portion for blocking the flow of fluid.

According to the above, the medical needle is provided with a blocking part between the needle holding part and the protector, so that a fluid (steam or outside air) is generated between the needle holding part and the protector during the high-pressure steam sterilization process or after the high-pressure steam sterilization process. ) Can be blocked from flowing. That is, in the medical needle, the portion communicating with the space in which the needle body is arranged in the assembled state is blocked and the vapor and the outside air are prevented from reaching the space in which the needle body is arranged. There is no effect, and the hygiene of the needle body can be improved.

In this case, the fitting body is provided with a cap that is attached to the protector before the needle body is punctured and covers the needle body, and the protector is formed of an elastic body at least at the attachment position of the cap and is configured as the blocking portion. In the state before puncturing the needle body, the needle holding portion is in close contact with the entire inner peripheral surface of the fitting portion, and the cap is in close contact with the entire outer peripheral surface of the fitting portion It is good to be.

As described above, the medical needle is in a state before the needle body is punctured, and the needle holding portion is in close contact with the entire inner peripheral surface of the fitting portion made of the elastic body of the protector, and the cap is the outer periphery of the fitting portion. By closely adhering to the entire circumference of the surface, the space in which the needle body in the cap is arranged can be airtightly closed. Therefore, the medical needle can prevent the fluid from entering the cap and can perform the high-pressure steam sterilization process satisfactorily. As a result, the liquid does not adhere to the needle body after the treatment, and the outside air contact during long-term storage can be completely blocked.

In addition to the above configuration, the fitting portion may be sandwiched between the needle holding portion and the cap in a state before the needle body is punctured.

As described above, the fitting portion is sandwiched between the needle holding portion and the cap, so that the flesh portion moves elastically, and a gap is formed between the needle holding portion and the fitting portion and between the cap and the fitting portion. It can be closely attached.

In this case, the protector includes the rigid housing cylinder that surrounds the tip of the needle body in the housing state of the needle body, and the fitting portion that is attached to the housing cylinder and protrudes in the distal direction from the housing cylinder. It is preferable to provide an elastic member.

Thus, by providing the protector with the housing cylinder and the elastic member, the medical needle can easily provide the fitting portion at the mounting position of the cap.

Further, the elastic member is configured as a wing member having a shaft portion attached to the housing cylinder and a wing protruding outward in the width direction from the shaft portion, and the fitting portion is integrally formed with the shaft portion. It is preferable that

Thus, since the fitting portion and the shaft portion are integrally formed, the fitting portion is easily configured as the wing member is formed. In addition, the medical needle has a reduced number of parts and can improve airtightness while improving work efficiency during assembly and reducing manufacturing costs.

In addition, the inner surface of the protector and the outer surface of the needle holding portion are in contact with each other on the proximal end side of the storage space before the needle body is punctured, thereby It is preferable to form a blocking structure that suppresses the inflow of fluid to the distal end side.

In this way, the needle holding part and the protector have a closed structure on the proximal end side of the storage space, so that when high-pressure steam sterilization is performed, entry of steam into the storage space on the distal end side than the closed structure is suppressed. can do. Therefore, the hygiene of the needle holder is also improved.

Further, it is preferable that the closing structure is configured such that a tapered protruding end surface of the closing wall protruding from the outer surface of the needle holding portion comes into contact with a tapered inner surface of the protector.

As described above, the protruding end surface of the needle holding portion and the inner surface of the protector are brought into contact with each other in a tapered shape, whereby a closed structure can be easily formed and the needle holding portion can be easily moved in the proximal direction.

Alternatively, the outer peripheral surface of the needle holding portion is provided with a sealing member made of an elastic body configured as the blocking portion and in contact with the entire circumference of the inner peripheral surface of the protector before the needle body is punctured. May be.

In this way, the seal member provided in the needle holding portion contacts the entire circumference of the inner peripheral surface of the protector, so that the seal member airtightly closes the accommodation space on the tip side with respect to the contact portion with the protector. Therefore, the medical needle can further improve the hygiene of the needle body during the high-pressure steam sterilization process or after the high-pressure steam sterilization process.

In this case, it is preferable that the seal member is disposed at a proximal end position in the accommodation space in a state before the needle body is punctured.

Thus, when the seal member is arranged at the proximal end position in the accommodation space, the medical needle is a space in which the needle holding portion extends on the distal end side from the seal member when performing the high-pressure steam sterilization process. In contrast, the intrusion of fluid can be prevented. Further, the seal member can be easily removed from the accommodation space during the relative movement of the needle body in the proximal direction, thereby facilitating the retraction of the needle holding portion.

In addition, the protector has a proximal end diameter-enlarged portion that is expanded radially outward from the distal end portion of the protector, and the seal member is in the state before the needle body is punctured, It is good to arrange inside.

Thus, by disposing the seal member inside the base end enlarged diameter portion of the protector, the base end side of the accommodation space is widened, so that a relatively large seal member can be applied. For this reason, the seal member can be easily assembled to the needle holding portion, and the adhesion to the inner peripheral surface of the protector is increased.

Furthermore, the seal member may be disposed at a distal end side position in the accommodation space in a state before the needle body is punctured.

Thus, even when the seal member is disposed at the distal end side position in the accommodation space, the seal member can airtightly block the space in which the needle body is disposed. Adhesion can be avoided.

Alternatively, the protector includes a storage cylinder that constitutes the storage space, and the protection cylinder is configured as the blocking section in contact with the needle holding section in a state before the needle body is punctured. A sealing member made of an elastic body that seals the inner peripheral surface of the housing cylinder over the entire circumference may be provided.

As described above, the medical needle is sealed in the space in which the needle body that may communicate with the distal end side of the housing space is arranged by sealing the inner peripheral surface of the housing cylinder of the protector over the entire circumference. , It is possible to reliably prevent the fluid from entering.

In this case, the sealing member penetrates the needle body on the inner peripheral surface of the housing cylinder before the needle body is punctured, and the needle body is inserted into the needle body after the needle body is punctured. It is good to arrange | position in the said accommodation space of a base end side from the sealing member.

As described above, the medical needle is disposed in the accommodation space closer to the base end side than the sealing member after the needle body is punctured, thereby suppressing the scattering of blood adhering to the needle body after the accommodation. Inconveniences such as contamination can be suppressed.

Further, the sealing member is in contact with the outer peripheral surface of the needle body before the needle body is punctured, and further penetrates the needle body in a state where the needle body is accommodated in the accommodation space. It is preferable that the portion is narrowed or closed inside.

Thus, the medical needle is more distal than the sealing member when the sealing member accommodates the needle body in the accommodation space and the portion through which the needle body penetrates narrows or closes inward. The blood can be prevented from flowing out into the body, and the hygiene after puncture is further improved.

Further, the protector may have a blood reservoir part for storing blood away from the needle body on the tip side of the arrangement position of the sealing member.

In this way, the protector has a blood reservoir, so that when the sealing member wipes the blood of the needle body when the sealing member is retracted, the blood flows in the distal direction of the sealing member. The blood pool can prevent blood from flowing out.

Furthermore, it is preferable that the sealing member is in contact with the entire outer peripheral surface of the needle holding portion in a state before the needle body is punctured.

As described above, the sealing member comes into contact with the entire outer peripheral surface of the needle holding portion, so that the meat portion moves between the needle holding portion and the protector so as to fill the gap. Therefore, it is possible to reliably block the fluid from heading toward the storage space on the tip side of the tip of the needle holder during the high-pressure steam sterilization process.

And it is preferable that the said sealing member consists of a member different from the said storage cylinder.

As described above, the medical needle can be easily provided at a desired position of the protector because the sealing member is made of a separate member from the housing cylinder, and the labor and manufacturing cost during manufacturing can be reduced. be able to.

Furthermore, a cap that covers the needle body may be in close contact with the tip of the protector over the entire outer peripheral surface of the tip.

In this way, by attaching the cap over the entire outer peripheral surface of the tip of the protector, fluid can be blocked from entering through the gap between the cap and the protector.

According to the medical needle of the present invention, the hygienic properties of the needle body at the time of high-pressure steam sterilization treatment or after high-pressure steam sterilization treatment by blocking a portion that may communicate with the space where the needle body is arranged in the assembled state. Can be increased.

It is a perspective view which shows the medical needle at the time of use which concerns on 1st Embodiment of this invention. It is a disassembled perspective view of the medical needle of FIG. 3A is a perspective view showing a medical needle before use, FIG. 3B is a perspective view showing a medical needle during use, and FIG. 3C is a perspective view showing a medical needle after use. . 4A is a partial plan sectional view of the medical needle in use, and FIG. 4B is a sectional view taken along line IVB-IVB in FIG. 4A. 5A is a plan view of the medical needle after use, and FIG. 5B is a cross-sectional view taken along line VB-VB of FIG. 5A. It is sectional drawing explaining the effect of the medical needle of FIG. It is a disassembled perspective view of the medical needle which concerns on 2nd Embodiment of this invention. 8A is a partial plan sectional view of the medical needle of FIG. 7, and FIG. 8B is a sectional view taken along line VIIIB-VIIIB of FIG. 8A. It is sectional drawing explaining the effect of the medical needle of FIG. It is sectional drawing which shows the medical needle which concerns on a 1st modification. It is sectional drawing which shows the medical needle which concerns on a 2nd modification. It is a disassembled perspective view of the medical needle which concerns on 3rd Embodiment of this invention. It is side surface sectional drawing of the medical needle of FIG. 14A is a cross-sectional view for explaining the action and effect of the medical needle of FIG. 12 during high-pressure steam sterilization, and FIG. 14B is a cross-sectional view for explaining the action and effect of the medical needle of FIG. 12 after puncturing. . 15A is a partial cross-sectional view showing a protector according to a third modification, FIG. 15B is a partial cross-sectional view showing a protector according to a fourth modification, and FIG. 15C shows a protector according to a fifth modification. It is a fragmentary sectional view shown.

Hereinafter, preferred embodiments of the medical needle according to the present invention will be described and described in detail with reference to the accompanying drawings.

[First Embodiment]
The medical needle 10 according to the first embodiment of the present invention is used for blood donation, and is configured as a blood collection needle for whole blood that collects a certain amount of all blood components of a blood donor. As shown in FIGS. 1 and 2, the medical needle 10 accommodates a needle body 12 (canula), a hub 14 (needle holding portion) for holding the needle body 12, and a needle body 12 punctured by a blood donor. Protector 16. Note that the configuration of the medical needle 10 according to the present embodiment is not limited to the whole blood blood collection needle, but may be applied to a component blood collection needle, and may be applied to a drug injection needle or the like. Also good.

The medical needle 10 is configured as a winged indwelling needle (so-called winged needle). The pair of wings 22 of the medical needle 10 serves as a gripping part that is held by a medical worker such as a doctor or a nurse and performs a puncturing operation of the needle body 12, and is spread on the body surface of the blood donor during blood collection. It becomes a fixing part used when fixing with a bandage. The protector 16 of the medical needle 10 includes an accommodation cylinder 18 and a shaft portion 74 of a wing member 20 (elastic member) attached to the accommodation tube 18, and the wing 22 is integrally formed with the shaft portion 74. ing. The configuration of the medical needle 10 according to the present embodiment can also be applied to needles other than those with wings.

The medical needle 10 is a part of a blood collection set in the product provision state shown in FIG. 3A (hereinafter also referred to as “before use”). Specifically, in a state where the hub 14 and the protector 16 are assembled to each other, a tube 26 connected to a blood bag (not shown) is connected and fixed to the proximal end of the hub 14. In the medical needle 10, the needle body 12 protrudes from the tip of the protector 16, and the needle body 12 is covered with a cap 24.

When blood is collected (hereinafter also referred to as in use), as shown in FIG. 3B, the medical staff removes the cap 24, and the exposed needle body 12 is punctured into the blood vessel of the blood donor. As a result, the medical needle 10 becomes a blood lead-out portion that collects the blood of the blood donor, blood flows out into the lumen 27 of the tube 26, and further, blood is supplied to the blood bag through the lumen 27.

After blood collection is finished (hereinafter also referred to as “after use”), the medical staff pulls out the needle body 12 from the blood donor, and the needle body 12 is housed in the protector 16 as shown in FIG. 3C. Discarded. Hereinafter, each configuration of the medical needle 10 that performs this operation will be described in detail.

As shown in FIGS. 1, 4A, and 4B, the needle body 12 of the medical needle 10 has a long hollow tube having rigidity that can be punctured from the skin of the blood donor to the inside of the blood vessel. A sharp needle tip 28 is formed at the tip of the needle body 12, and the needle tip 28 is provided with an opening 28a through which blood can flow. Further, inside the needle body 12, a flow path 30 is provided which communicates with the opening 28 a and allows blood to flow along the axial direction of the needle body 12.

The thickness of the needle body 12 is not particularly limited, but may be designed in consideration of shortening the blood donation time and reducing the fear of the donor. In the present embodiment, the outer diameter of the needle body 12 is set to 1.25 mm. Further, the length of the needle body 12 may be designed in consideration of improvement in operability and reduction in fear of the patient. For example, the length of the portion protruding from the hub 14 is preferably 40 mm or less. is there. Examples of the constituent material of the needle body 12 include a metal material such as stainless steel, aluminum, an aluminum alloy, titanium, or a titanium alloy.

As shown in FIGS. 2, 4A and 4B, the hub 14 holding the needle body 12 is formed in a cylindrical shape having an axis coaxial with the axis of the needle body 12, and the base end portion of the needle body 12 is formed. It is connected and fixed. The hub 14 engages with the protector 16 before and during use so that the hub 14 can be handled integrally. On the other hand, the hub 14 is disengaged and retracted relative to the protector 16 after use, so that the needle body 12 is retracted. It arrange | positions in the protector 16. FIG.

Inside the hub 14, there are provided hollow portions 32 that continue to the

openings

14 a and 14 b at both ends of the hub 14 and pass through the shaft center. On the distal end side of the hollow portion 32, a tapered portion 34 having a small diameter in the proximal direction from the opening portion 14 a on the front end side is formed by the inner wall of the hub 14. Inside the tapered portion 34, the needle body 12 is firmly fixed by being injected with the adhesive 36. Further, the hollow portion 32 on the proximal end side with respect to the tapered portion 34 is formed to have a slightly larger diameter, and serves as a communication passage 38 that communicates with the flow passage 30 of the needle body 12 that is fixed.

Further, the hub 14 is formed by integrally forming a shaft portion 40 accommodated in the protector 16 and an operation portion 42 that is connected to the proximal end side of the shaft portion 40 and exposed to the outside of the protector 16 before and during use. Composed. The shaft portion 40 is slidably disposed in the protector 16 and has an overall length that is slightly longer than the axial length of the protector 16. On the outer peripheral surface of the shaft portion 40, a locking portion 44 is provided at the distal end side position, and a closing portion 46 is provided at the proximal end side position.

The locking portion 44 includes an annular protrusion 44a that protrudes radially outward on the distal end side, and an annular hook portion 44b that protrudes radially outward at a position spaced from the annular protrusion 44a in the proximal direction. The annular protrusion 44a is formed in a quadrangular shape in a sectional view (see FIG. 4B), and the annular hook portion 44b is formed in a substantially right triangle shape having an inclination on the base end side in the sectional view.

The closing portion 46 is formed on the outer peripheral surface of the shaft portion 40 in a conical shape that gradually increases in diameter toward the base end direction of the hub 14. The blocking part 46 has a plurality of (four) cutout parts 46 a along the circumferential direction of the shaft part 40. The notch 46a extends from the tip having a conical shape to the front of the base end of the closing portion 46, and the outer peripheral surface of the shaft portion 40 is exposed. A proximal end side of the cutout portion 46a constitutes a disc-shaped blocking wall 46b that is continuous over the entire circumference of the shaft portion 40 in the circumferential direction. The blocking wall 46 b has a tapered protruding end surface 47 a that protrudes radially outward from the hub 14. The projecting end surface 47 a contacts the tapered inner surface 47 b of the peripheral wall 58 constituting the housing space 60 in a state where the hub 14 is housed in the protector 16.

On the other hand, the operation part 42 is connected to the shaft part 40, and in a plan view (see FIG. 4A), a base part 48 having a narrow front end side and a wide base end side, and a base end side of the base part 48 in the front end direction. And a pair of protruding arms 50. The base end surface of the base portion 48 is provided with a base end opening portion 14b communicating with the hollow portion 32 at an axial center position and an annular connection groove 52 that circulates around the radially outer side of the opening portion 14b. The connection groove 52 fits and holds the tube 26 (see FIG. 3A), and allows the communication path 38 of the hub 14 and the lumen 27 of the tube 26 to communicate with each other. The base 48 may be integrally formed with the hub 14 as shown in the drawing, or may be configured separately.

The arm 50 includes a claw portion 50a that protrudes outward in the width direction on the distal end side, and an operation protrusion 50b that protrudes outward in the width direction on the base end side spaced from the claw portion 50a. The claw portion 50 a is inserted into the protector 16 and engages with the engagement hole 70 of the protector 16 before and during use. Thereby, the hub 14 and the protector 16 are integrated.

The operation protrusion 50b is a part that is exposed from the protector 16 and pressed by a medical worker. That is, the pair of arms 50 is elastically deformed inward by pressing of the pair of operation protrusions 50b by a medical worker. For this reason, the claw portions 50a on the distal end side come close to each other and release the engagement with the protector 16, so that the hub 14 together with the needle body 12 can be retracted relative to the protector 16.

The hub 14 is preferably made of a relatively hard resin material. For example, thermoplastic resins such as polypropylene, polycarbonate, polyamide, polysulfone, polyarylate, and polyvinyl chloride can be suitably used. The hub 14 of this embodiment employs polycarbonate, which is a material having high heat resistance, hygiene, and water repellency.

As shown in FIGS. 2 and 3C, the protector 16 of the medical needle 10 has a function of accommodating the needle body 12 after blood collection is finished (after use) and preventing the needle tip 28 from being pierced. The housing cylinder 18 of the protector 16 is formed by a cylindrical peripheral wall 58 and has a first space 62 inside which is a part of the housing space 60 of the needle body 12. The axial length of the storage cylinder 18 is longer than the axial length of the portion of the needle body 12 protruding from the hub 14 so that the needle tip 28 is positioned in the first space 62 as the needle body 12 is received. (See also FIG. 5B). As a constituent material of the housing cylinder 18, the resin material raised in the hub 14 may be appropriately adopted. The housing cylinder 18 of this embodiment employs polycarbonate in the same manner as the hub 14.

As shown in FIG. 2, the storage cylinder 18 includes an attachment cylinder part 64 for attaching the wing member 20, an extension cylinder part 66 that extends to the proximal end of the attachment cylinder part 64 and extends in the proximal direction. It has a locking cylinder part 68 which is connected to the base end of the cylinder part 66 and formed on the radially outer side with a slightly larger diameter.

The attachment cylinder part 64 is formed to be slightly thinner than the extension cylinder part 66, and the wing member 20 is tightly fixed to the outer peripheral surface thereof. The level difference between the attachment cylinder part 64 and the extension cylinder part 66 defines the attachment position of the wing member 20. The distal end side of the mounting cylinder portion 64 is positioned in the vicinity of the peripheral wall 58 with the annular protrusion 44a and the annular hook portion 44b in a state where the hub 14 is accommodated in the first space 62. The coaxiality of the heart is ensured and the posture of the needle body 12 is stabilized.

On the other hand, the locking cylinder portion 68 is formed so as to taper from the boundary portion of the extending cylinder portion 66 toward the proximal end, and to reach the proximal end from the middle position with the same outer diameter. A pair of engagement holes 70 are formed in the peripheral wall 58 of the locking cylinder portion 68 to hook the claw portion 50a of the hub 14. In addition, the latching structure of the protector 16 and the hub 14 is not specifically limited, For example, you may provide the surrounding wall 58 with the recessed part and groove part which can hook the nail | claw part 50a.

As shown in FIG. 4B, the inclined projecting end surface 47a of the blocking wall 46b of the hub 14 is in surface contact with the tapered inner surface 47b of the locking cylinder portion 68 over the entire circumference in the circumferential direction. That is, the projecting end surface 47a of the hub 14 and the inner surface 47b of the housing cylinder 18 constitute a closing structure 47 that closes the housing space 60 on the tip side of the closing wall 46b.

The accommodating cylinder 18 has a plurality (four in the present embodiment) protruding in the base end direction and the axial center side of the first space 62 at the boundary between the extending cylinder part 66 and the locking cylinder part 68. An elastic piece 72 is provided. The four elastic pieces 72 are provided at equal intervals (90 ° out of phase) along the circumferential direction of the protector 16. The elastic piece 72 is shaped so that the protruding end is elastically shifted toward the axial center side of the housing cylinder 18. In addition, an engagement groove 72a that engages with the annular protrusion 44a when the hub 14 is retracted is formed at a predetermined position (near the connecting portion with the peripheral wall 58) of the surface facing the axis of the elastic piece 72.

The four elastic pieces 72 are accommodated in the four cutout portions 46a formed in the closing portion 46 of the hub 14 before and during use. As a result, the hub 14 is restricted from rotating relative to the protector 16, and rattling is suppressed by the four elastic pieces 72.

1, the wing member 20 of the protector 16 is firmly fixed to the mounting cylinder portion 64 of the housing cylinder 18. The wing member 20 is made of a resin material that is higher in flexibility and elastic modulus than the housing cylinder 18 (that is, made of an elastic body). Examples of the elastic body constituting the wing member 20 include various rubber materials such as natural rubber, isoprene rubber, butyl rubber, chloroprene rubber, nitrile-butadiene rubber, styrene-butadiene rubber, and silicone rubber (especially those subjected to vulcanization treatment). And styrene elastomers, hydrogenated styrene elastomers, polyolefins such as polyethylene, polypropylene, polybutene, and α-olefin copolymers in these styrene elastomers, liquid paraffin, oils such as process oil, talc, cast , Powdered inorganic materials such as mica, polyvinyl chloride elastomers, olefin elastomers, polyester elastomers, polyamide elastomers, polyurethane elastomers, or mixtures thereof. . Since the wing member 20 is formed more flexibly than the accommodating cylinder 18 in the medical needle 10, the contact with the body surface of the blood donor can be weakened in the indwelling state, and the burden on the blood donor can be reduced.

As shown in FIGS. 1 to 4B, the wing member 20 is connected to a shaft portion 74 attached to the mounting cylinder portion 64 and a pair of lower portions (body surface fixing scheduled portions) of the shaft portion 74 and projecting outward in the width direction. It has the wing 22 and the front-end | tip part 76 (fitting part: interruption | blocking part) which protrudes from the axial part 74 to a front-end | tip direction.

As described above, the shaft portion 74 of the wing member 20 constitutes a part of the protector 16. The shaft portion 74 is formed to have a length that is thicker than the mounting tube portion 64 of the housing tube 18 and matches the axial length of the mounting tube portion 64. An attachment hole 74 a that is in close contact with the outer peripheral surface of the attachment cylinder portion 64 is provided inside the shaft portion 74.

The pair of wings 22 includes a thin portion 82 that is thinly connected to the shaft portion 74, and an outer wing portion 84 that is connected to the protruding side of the thin portion 82 and is thicker than the thin portion 82. The pair of wings 22 protrude outward in the width direction of the shaft portion 74 in a normal state where the pair of wings 22 is not operated by a medical worker. Then, when the needle body 12 is punctured, a pair of outer wing portions 84 are put together and picked up by the medical staff above the shaft portion 74, so that the puncture operation of the needle body 12 is favorably performed.

Therefore, the thin-walled portion 82 can be elastically deformed with a weak force, and the upper side surface is deformed toward the shaft portion 74 at the time of puncturing. The distal end edges of the thin wall portion 82 and the outer wing portion 84 are inclined toward the proximal direction so that the needle body 12 and the distal end portion 76 can be easily seen during puncturing.

Further, the pair of outer wing portions 84 are formed in a rectangular shape protruding in the proximal direction from the thin portion 82 in plan view. A plurality (two in this embodiment) of convex portions 84a that are long in the width direction of the wing member 20 are formed on one of the facing surfaces where the pair of outer wing portions 84 come into contact with each other. On the other side of the opposing surface, a plurality (two) of concave portions 84b that are long in the width direction are formed at positions corresponding to the convex portions 84a. Therefore, in the wing member 20, the shift between the outer wing portions 84 is suppressed in a state where the pair of outer wing portions 84 are overlapped.

The front end portion 76 is a cylindrical portion that protrudes from the front end surface of the shaft portion 74 in the front end direction. The cap 24 shown in FIG. 3A is attached to the tip 76 before use. A second space 86 that communicates with the first space 62 and forms the accommodation space 60 together with the first space 62 is formed inside the distal end portion 76 in a state where the accommodation cylinder 18 is attached.

The distal end portion 76 has a peripheral wall 88 (wall portion) that surrounds the second space 86 in the circumferential direction, and is slightly tapered at the proximal end side connecting portion 90 that continues to the shaft portion 74 and the distal end side of the proximal end side connecting portion 90. A tip end side tapered portion 92 is formed. The distal end side of the annular protrusion 44a of the hub 14 is inserted into the second space 86 on the proximal end side connecting portion 90 side before and during use. That is, the peripheral wall 88 of the base end side connecting portion 90 is supported from the inside by the tip of the hub 14, and the cap 24 is attached to the outside of the tip portion 76 in this state before use.

Here, as shown in FIG. 3A, the cap 24 that covers the needle body 12 in the product provision state is formed in a cylindrical shape that is long in the axial direction, and an arrangement space 25 in which the needle body 12 and the distal end portion 76 are disposed is provided therein. Have. An inner diameter on the proximal end side of the cylindrical wall 24a constituting the cap 24 is formed to be slightly smaller (or the same diameter) than an outer diameter of the proximal end side connecting portion 90 of the distal end portion 76, and the cap 24 and the distal end portion are formed. In the attached state of 76, it is in close contact with the outer peripheral surface of the proximal end side connecting portion 90.

The material constituting the cap 24 is not particularly limited as long as it is a material harder than the wing member 20. For example, the resin material mentioned in the hub 14 may be appropriately adopted. The cap 24 of this embodiment employs polypropylene.

In this case, the distal end portion 76 becomes a portion that is easily elastically deformed due to the low elastic modulus, and the distal end of the hard hub 14 enters the second space 86 inside thereof. In other words, the tip end side of the protector 16 is in a state where the tip end portion 76 is sandwiched between the hard hub 14 and the cap 24 before use (see also FIG. 6). Therefore, the peripheral wall 88 of the base end side connecting portion 90 moves so that the gap between the hub 14 and the cap 24 is filled, and the hub 14 and the cap 24 are closed without being bent radially outward or radially inward. Maintain state.

In other words, before use, the medical needle 10 has the cylindrical wall 24a of the cap 24 and the peripheral wall 88 of the proximal end side connecting portion 90 firmly adhered to each other, and the peripheral wall 88 of the proximal end side connecting portion 90 and the hub 14 are in close contact with each other. The tip is also firmly attached. As a result, the arrangement space 25 of the cap 24 and the second space 86 of the distal end 76 are blocked from the outside of the medical needle 10 and the first space 62 with high airtightness.

[Correction 28.06.2016 under Rule 91]
Further, the cap 24 is not in contact with the distal end side tapered portion 92 of the distal end portion 76 and is in close contact with only the outer peripheral surface of the proximal end side connecting portion 90. Therefore, although the cap 24 and the wing member 20 are mounted with high airtightness, there are few portions where the cylindrical wall 24a and the peripheral wall 88 are in surface contact, and the cap 24 and the wing member 20 can be easily removed by removing the cap 24 in the axial direction. it can. Of course, the medical needle 10 may have a configuration in which the cap 24 is in contact with the entire outer peripheral surface of the distal end portion 76 to improve airtightness.

At the tip of the tip-side tapered portion 92, a return portion 94 that is inclined inward from the peripheral wall 88 and formed in a mortar shape is provided, and a tip opening 76a that communicates with the second space 86 by the protruding end of the return portion 94 is provided. Is formed. The distal end opening 76a is formed to have a relatively large diameter so that the needle body 12 can pass in a non-contact manner when the needle body 12 moves backward. Although the diameter of the tip opening 76a depends on the outer diameter of the needle body 12, for example, when the clearance of 0.3 mm or more is formed between the needle body 12 and the needle body 12, the needle body 12 is not contacted. Can pass well. In the present embodiment, the diameter of the tip opening 76a is set to 2 mm. Note that the medical needle 10 does not have to include the return portion 94.

The medical needle 10 according to the present embodiment is basically configured as described above, and the operation and effect thereof will be described below.

The medical needle 10 is provided as a blood collection set for use in donating whole blood. When the medical needle 10 is assembled, the needle body 12 and the hub 14 fixed state are first sterilized by an appropriate sterilization process and then assembled to the protector 16. Specifically, the wing member 20 is fixed to the mounting cylinder portion 64 of the housing cylinder 18, and the hub 14 and the protector 16 are integrated with each other by engaging the arm 50 of the hub 14 and the engagement hole 70 of the housing cylinder 18. Can be handled. In this assembled state, the needle body 12 protrudes from the tip 76 of the wing member 20.

Further, a cap 24 (see FIG. 3A) is attached to the outside of the needle body 12 and the distal end portion 76, and a blood bag and a tube 26 of a blood collection set are connected to the base end surface of the hub 14 before providing the product. A blood collection set is configured. The medical needle 10 is subjected to high-pressure steam sterilization (autoclave sterilization) in a blood collection set.

In the high-pressure steam sterilization process, water (liquid) is stored in a tank of an autoclave device (not shown) and a medical needle 10 (blood collection set) is introduced. A well-known thing may be applied for an autoclave apparatus. For example, the autoclave device performs cleaning and sterilization of the medical needle 10 by increasing the temperature of water (steam) to 100 ° C. or higher by increasing the pressure in the closed tank.

A large amount of steam is applied to the medical needle 10 during this high-pressure steam sterilization treatment. However, as shown in FIG. 6, the distal end portion 76 is prevented from bending inward because the distal end portion of the hub 14 is inserted into the second space 86. Therefore, the cap 24 and the distal end portion 76 maintain a strong contact state, and block water from entering the arrangement space 25 from between the contact portions of the cap 24 and the distal end portion 76.

Further, in the medical needle 10, the closing wall 46 b of the hub 14 is in contact with the peripheral wall 58 of the housing cylinder 18 on the proximal end side (the locking cylinder portion 68) of the housing cylinder 18, and the medical needle 10 One space 62 is blocked. Therefore, it is possible to prevent the vapor from entering the first space 62 on the tip side of the contact portion, and to prevent water from collecting between the hub 14 and the housing cylinder 18. In particular, the protruding end surface 47a of the blocking wall 46b and the inner surface 47b of the housing cylinder 18 are formed in a tapered shape and are in surface contact with each other. Therefore, even if the hub 14 and the housing cylinder 18 are each formed rigidly, the closing structure 47 can improve the closing property of the first space 62.

Even if the vapor enters the first space 62 on the distal end side of the blocking wall 46b, the peripheral wall 88 of the distal end portion 76 (base end side coupling portion 90) to which the cap 24 is fitted and the distal end of the hub 14 are not connected. Airtight contact. For this reason, the infiltration of the vapor into the space (the second space 86 and the arrangement space 25) on the tip side of the hub 14 is firmly blocked. Therefore, the medical needle 10 can reliably prevent water from adhering to the needle body 12 inserted directly into the blood vessel during the high-pressure steam sterilization process. Furthermore, the distal end portion 76 of the medical needle 10 can block outside air (including bacteria) from entering the arrangement space 25 even during product storage after high-pressure steam sterilization.

In addition, according to the present invention, it is possible to perform high-pressure steam pressure sterilization processing with a simple structure without performing precise design and material selection that are conventionally required to maintain airtightness using an O-ring or another part. These problems such as shrinkage or deformation of the thermoplastic part can be solved.

As described above, in the medical needle 10 according to the first embodiment, the hub 14 is in close contact with the entire inner peripheral surface of the distal end portion 76 and the outer peripheral surface of the distal end portion 76 before the needle body 12 is punctured. Since the cap 24 is in close contact with the entire circumference, the arrangement space 25 of the cap 24 can be hermetically closed. Therefore, the medical needle 10 can reliably prevent the invasion of steam from between the protector 16 and the cap 24 into the arrangement space 25 and can perform the high-pressure steam sterilization process well. And the medical needle 10 is highly sanitary.

In this case, the front end portion 76 is sandwiched between the hub 14 and the cap 24, so that the flesh portion moves elastically, and there is no gap between the hub 14 and the front end portion 76 and between the cap 24 and the front end portion 76. It can be adhered. In addition, since the protector 16 includes the housing cylinder 18 and the wing member 20, the medical needle 10 can easily form an elastic portion on which the cap 24 is elastically attached. Furthermore, the hub 14 and the protector 16 have the closed structure 47 on the proximal end side of the storage space 60, thereby suppressing steam from entering the storage space 60 on the distal side of the closed structure 47 during the high-pressure steam sterilization process. can do. Therefore, the hygiene of the hub 14 is also improved.

In addition, the medical needle 10 according to the present invention is not limited to the above-described embodiment, and various modifications and application examples can be taken. Hereinafter, some other embodiments of the medical needle 10 according to the present invention will be described. In the following description, the same reference numerals are given to the same configuration or the same function as the medical needle 10 of the first embodiment, and the detailed description thereof is omitted.

[Second Embodiment]
A medical needle 10A according to the second embodiment shown in FIGS. 7 to 9 is configured as an indwelling needle having a needle body 12, a hub 14, and a protector 16, like the medical needle 10. It differs from the medical needle 10 in that an O-ring 100 (seal member: blocking part) is provided.

Specifically, the hub 14 of the medical needle 10A has a shaft portion 40 and an operation portion 42 before and during use. On the outer peripheral surface of the shaft portion 40, a locking portion 44 is provided at the distal end side position, and a closing portion 102 is provided at the proximal end side position.

The closing part 102 forms a closing structure 103 (see FIG. 8B) that airtightly closes the accommodation space 60 together with the accommodation cylinder 18 of the protector 16. The blocking portion 102 is disposed between a pair of

disk portions

104 and 106 that protrude radially outward from the outer peripheral surface of the shaft portion 40 and circulate in a ring shape along the circumferential direction, and the pair of

disk portions

104 and 106. Including the O-ring 100 described above.

As shown in FIG. 8B, the pair of

disk portions

104 and 106 are positioned in the vicinity of the peripheral wall 58 (inner surface) constituting the accommodation space 60 in a state where the hub 14 is accommodated in the protector 16. That is, the pair of

disk portions

104 and 106 are not in contact with the peripheral wall 58. The pair of

disk portions

104 and 106 form a groove having an interval that can accommodate the O-ring 100 without a gap.

The O-ring 100 is disposed along the circumferential direction on the outer peripheral surface of the hub 14 between the pair of

disk portions

104 and 106. The outer portion of the O-ring 100 slightly protrudes outward in the radial direction from the outer edges of the pair of

disk portions

104 and 106. The O-ring 100 contacts the entire circumference of the circumferential wall 58 of the housing cylinder 18 in a state where the hub 14 is housed in the housing space 60 of the protector 16. As a result, the O-ring 100 hermetically closes the accommodation space 60 on the tip side of the O-ring 100 and prevents the intrusion of fluid (steam or bacteria).

The material constituting the O-ring 100 is not particularly limited, but a material having an appropriate elastic force is desirable. For example, the material of the wing member 20 described above may be appropriately applied.

The medical needle 10A according to the second embodiment is basically configured as described above, and the operation and effect thereof will be described below. Similarly to the medical needle 10 according to the first embodiment, the medical needle 10A is assembled into a blood collection set and subjected to high-pressure steam sterilization (autoclave sterilization) in the state of the blood collection set.

During the high-pressure steam sterilization treatment, a large amount of steam is applied to the medical needle 10A. However, as shown in FIG. 9, the cap 24 and the tip 76 are maintained in a tight contact state, and fluid (steam or bacteria) enters the arrangement space 25 from between the contact portions of the cap 24 and the tip 76. Shut off. Further, in the medical needle 10 </ b> A, the O-ring 100 provided in the hub 14 contacts the peripheral wall 58 of the housing cylinder 18 on the proximal end side of the first space 62, and the first space 62 on the distal end side with respect to this contact portion. Airtightly blocked. Therefore, the flow of steam and bacteria to the first space 62 on the tip side of the O-ring 100 is reliably blocked.

In particular, the O-ring 100 is formed relatively large in the locking cylinder portion 68 and elastically deforms, and the movement of the hub 14 in the axial direction is restricted by the pair of

disk portions

104 and 106, so that the engagement cylinder 18 is engaged. The tip position is blocked from the joint hole 70. Therefore, the O-ring 100 exhibits high sealing performance and reliably closes the first space 62 on the tip side of the O-ring 100. Further, since the closing portion 102 is provided on the proximal end side of the hub 14, when the hub 14 is retracted in the proximal direction with respect to the protector 16, the O-ring 100 is immediately exposed to the outside. Therefore, the medical staff can perform the backward operation of the hub 14 with a weak force.

As described above, in the medical needle 10A according to the second embodiment, the O-ring 100 that comes into contact with the inner surface of the protector 16 airtightly closes the accommodation space 60 on the tip side of the contact portion. For this reason, it can prevent reliably that vapor | steam and microbe enter | penetrate into the arrangement | positioning space 25 of the needle body 12 which may be connected to the 2nd space 86. FIG. Therefore, the medical needle 10A can be well subjected to high-pressure steam sterilization, and no water adheres to the needle body 12 after the treatment, so that the hygiene of the needle body 12 can be enhanced.

In this case, the O-ring 100 is arranged at the proximal end side position in the accommodation space 60, so that the medical needle 10A extends to the front side of the O-ring 100 when performing the high-pressure steam sterilization process. Against this, it is possible to prevent the invasion of steam and bacteria. Therefore, the hygiene of the hub 14 is also improved.

Further, the medical needle 10A is not limited to the above-described embodiment, and various modifications and application examples can be taken. For example, the sealing member that closes the accommodation space 60 is not limited to the O-ring 100, and various members that can be airtightly closed with the peripheral wall 58 may be applied. For example, a block-shaped member made of an elastic body may be provided in the middle of the hub 14, and a film material made of an elastic body may be attached to the outer peripheral surface of the hub 14. Hereinafter, some modified examples of the medical needle 10A will be described with some examples.

The hub 110 according to the first modification shown in FIG. 10 is different from the hub 14 according to the present embodiment in that the closing portion 112 is provided on the distal end side of the hub 110. As with the closing portion 102, the closing portion 112 is a pair of

disk portions

114 and 116 that protrude radially outward from the outer peripheral surface of the hub 110, and an O-ring disposed between the pair of

disk portions

114 and 116. 118.

The pair of

disk portions

114 and 116 protrudes short so as not to contact the peripheral wall 58 (inner surface) of the housing cylinder 18. The distance between the pair of

disk portions

114 and 116 is shorter than the pair of

disk portions

104 and 106 of the hub 14 and accommodates an O-ring 118 that is similarly formed in a small shape.

When the O-ring 118 is attached to the hub 110, the O-ring 118 protrudes radially outward from the pair of

disk portions

114 and 116 and comes into air-tight contact over the entire circumferential direction of the peripheral wall 58. As a result, the accommodation space 60 (that is, the second space 86 communicating with the first space 62) and the arrangement space 25 on the tip side of the O-ring 118 are closed. That is, the O-ring 118 can obtain the same effect as that of the O-ring 100 and can prevent vapor and bacteria from entering the needle body 12 in the arrangement space 25. In short, the installation position of the seal member on the axial direction of the

hubs

14 and 110 is not particularly limited.

Further, the hub 120 according to the second modification shown in FIG. 11 has a first closing portion 122 on the axial base end side and a second closing portion 124 on the axial front end side. The first closing portion 122 includes a pair of

disk portions

104 and 106 and an O-ring 100 similarly to the closing portion 102, and the second closing portion 124 includes a pair of

disk portions

114 and 116 and an O-ring similar to the closing portion 112. 118 is included. If a plurality of seal members are provided in the axial direction of the hub 120 in this way, the occlusion can be further improved and the entry of steam and bacteria during the high-pressure steam sterilization treatment can be prevented more reliably.

Further, as shown in FIG. 11, in the medical needle 10A, the protector 16 may be constituted by a protective member 126 in which the housing cylinder 18 and the wing member 20 are integrally formed. The protective member 126 is made of a material harder than the O-

rings

100 and 118, and the internal accommodation space 60 is hermetically sealed by contact of the O-

rings

100 and 118. In this case, an appropriate sealing means (for example, an O-ring 128 shown in FIG. 11) may be provided at a place where the cap 24 and the protection member 126 are attached.

[Third Embodiment]
A medical needle 10B according to the third embodiment shown in FIGS. 12 to 14B is configured as an indwelling needle having a needle body 12, a hub 14, and a protector 16 in the same manner as the medical needle 10. It differs from the medical needle 10 in that it includes a closing member 54 (sealing member: blocking part).

Specifically, the mounting tube portion 64 of the housing tube 18 (the protector 16) has an arrangement portion 64a for housing and arranging the closing member 54 (sealing member) on the distal end side of the first space 62. (See also FIG. 13). The disposing portion 64a is formed to be thinner than the wall thickness of the peripheral wall 58 on the base end side, so that the inner surface of the first space 62 is slightly enlarged in diameter. The arrangement portion 64 a regulates the displacement of the closing member 54 in the proximal direction in the accommodated state of the closing member 54.

As shown in FIGS. 12 and 13, the closing member 54 is housed and disposed in the placement portion 64a, and is secured to the housing cylinder 18 by an appropriate securing means such as adhesion or welding. The occlusion member 54 has a function of sealing between the hub 14 and the protector 16 during high-pressure steam sterilization processing and preventing blood spillage from the needle body 12 after use.

The closing member 54 includes a side wall 54a that protrudes in parallel along the axial direction of the housing cylinder 18, and a distal end wall 54b that is connected to the distal end side of the side wall 54a and closes the distal end side of the closing member 54, and has a short axial direction. It is formed in a bottom cylinder shape.

The outer peripheral surface of the side wall 54a is fixed to the inner peripheral surface of the arrangement portion 64a. An insertion space 56 that communicates with the first space 62 on the proximal end side and into which the distal end of the hub 14 can be inserted is formed inside the side wall 54a. The side wall 54a that constitutes the insertion space 56 is set to have an inner diameter smaller than the inner diameter of the peripheral wall 58 of the housing cylinder 18, and protrudes from the peripheral wall 58 toward the inner side in the radial direction of the first space 62, so that it can be used before and during use. Surface contact is made over the entire outer peripheral surface of the tip of the hub 14. That is, in the medical needle 10B, the inner surface of the side wall 54a and the outer surface of the distal end of the hub 14 come into airtight contact with each other, and the distal end side of the first space 62 is closed.

The distal end wall 54b of the closing member 54 is formed in a film shape in a direction perpendicular to the axial direction from the distal end of the side wall 54a, and a space (second space 86) on the distal end side relative to the distal end wall 54b and the insertion space 56 are formed. Cut off. The tip wall 54b is formed to be thicker than the side wall 54a, so that damage and the like are suppressed, and the tip wall 54b can be easily elastically deformed. The distal end of the hub 14 is in contact with the proximal end surface of the distal end wall 54b before and during use.

A slit 56a (through portion) capable of communicating the insertion space 56 and the second space 86 is formed at the center of the tip wall 54b. The needle body 12 is arranged through the slit 56a before and during use. The closing member 54 may be configured not to include the slit 56a but to pierce and penetrate the needle body 12 into the distal end wall 54b when the medical needle 10B is assembled.

The material constituting the closing member 54 is not particularly limited, but a material having an appropriate elastic force is desirable. For example, the material of the wing member 20 described above may be appropriately applied.

The medical needle 10B according to the present embodiment is basically configured as described above, and the operation and effect thereof will be described below. Similarly to the

medical needles

10 and 10A, the medical needle 10B is assembled into a blood collection set, and is subjected to high-pressure steam sterilization processing (autoclave sterilization processing) in the state of the blood collection set.

During this high-pressure steam sterilization treatment, a large amount of steam is applied to the medical needle 10B. However, as shown in FIG. 13, in the medical needle 10 </ b> B, the blocking wall 46 b of the hub 14 contacts the peripheral wall 58 of the housing cylinder 18 on the proximal end side (locking cylinder portion 68) of the housing cylinder 18. The first space 62 closer to the tip than the portion is blocked. Therefore, infiltration of fluid (steam or bacteria) into the first space 62 on the tip side of the contact portion is suppressed.

In addition, when steam or bacteria enter the first space 62 on the tip side of the blocking wall 46b, the blocking member 54 provided on the tip side of the first space 62 has a tip of steam or bacteria as shown in FIG. 14A. Block direction movement.

That is, in the medical needle 10B before use, the side wall 54a of the closing member 54 fixed to the peripheral wall 58 of the housing cylinder 18 and the tip of the hub 14 are in airtight contact. In particular, the side wall 54 a is sandwiched between the housing cylinder 18 and the hub 14. Therefore, the side wall 54a moves so as to fill the gap on the distal end side of the first space 62, and maintains the closed state with the hub 14 without bending radially outward or radially inward. Therefore, the invasion of vapor and bacteria into the space (second space 86 and arrangement space 25) on the tip side of the closing member 54 is firmly blocked.

When the medical needle 10B sterilized in this way is used, the cap 24 is removed by the medical staff, and the needle body 12 is punctured into the blood vessel of the blood donor. After use, the needle body 12 is removed from the patient's body surface by the medical staff. Then, the medical worker presses the operation projections 50b of the pair of arms 50 to release the engagement between the protector 16 and the hub 14, and the needle 14 is moved backward relative to the protector 16 by moving the hub 14 relatively back. It guides to the accommodation space 60 of the protector 16. At this time, since the tip opening 76a of the wing member 20 is formed to be relatively large, the puncture portion of the needle body 12 can pass through the return portion 94 in a non-contact manner and adheres to the periphery of the needle body 12. The wiping of blood that is being done can be suppressed. Therefore, the hygiene of the outer surface side of the wing member 20 is maintained.

Also, the front end of the hub 14 comes out of close contact with the side wall 54a and moves away from the closing member 54 with relative ease. Accordingly, as shown in FIG. 14B, the needle tip 28 of the needle body 12 moves to the proximal end side with respect to the closing member 54.

Further, when the hub 14 is retracted, the closing member 54 allows the needle body 12 to retract while the distal end wall 54b is in contact with the outer peripheral surface of the needle body 12 that is disposed through the slit 56a. For this reason, when the blood has adhered around the needle body 12, the blood is wiped by the tip wall 54b. As described above, the blood wiped by the distal end wall 54b moves to the distal end side along the peripheral wall 88 when the distal end of the medical needle 10B is discarded with the distal end facing downward. Here, the medical needle 10B is provided with an annular recess 96 by the return portion 94 at the tip of the protector 16, and blood can be accumulated in the annular recess 96 to suppress blood spillage from the tip opening 76a.

Further, in a state where the needle body 12 is accommodated in the first space 62 on the base end side with respect to the closing member 54, the distal end wall 54b from which the needle body 12 is removed narrows (or closes) the slit 56a radially inward. Deform. Therefore, even if blood remains in the flow path 30 or the like of the needle body 12 and an external force or the like is applied to the medical needle 10B and the blood is separated from the needle body 12, the blood is more distal than the blocking member 54 by the distal end wall 54b. It can be prevented from flowing out to the side.

As described above, the medical needle 10B according to the third embodiment can obtain the same effects as the

medical needles

10 and 10A by including the closing member 54 that closes the inside of the accommodation space 60 in an airtight manner. In particular, the closing member 54 can reliably block steam and bacteria from moving to the arrangement space 25 on the distal end side of the hub 14 during the high-pressure steam sterilization process by making airtight contact with the outer peripheral surface of the hub 14. . Further, the medical needle 10B can retract the hub 14 relative to the side wall 54a of the closing member 54. On the other hand, the distal end wall 54b can easily narrow or close the slit 56a, and can more reliably suppress the outflow of blood from the needle body 12 accommodated in the accommodation space 60.

Further, the medical needle 10B is not limited to the above-described embodiment, and various modifications and application examples can be taken. For example, the protector 16 may be formed by integrally molding the housing cylinder 18 and the wing member 20. Further, for example, the closing member 54 may be configured by only the tip wall 54b without including the side wall 54a. This is because if the distal end wall 54b comes into contact with the needle body 12 and closes the accommodation space 60, it is possible to prevent vapor and bacteria from entering the second space 86 and the arrangement space 25. Hereinafter, another modification of the medical needle 10B will be described with reference to FIGS. 15A to 15C.

The protector 16A according to the third modification shown in FIG. 15A is different from the protector 16 in that the closing member 200 has a side wall 200a and a tip wall 200b, but the tip wall 200b protrudes radially inward. That is, the closing member 200 has a non-contact through hole 202 on the outer peripheral surface of the needle body 12. Even if the closing member 200 is configured in this manner, the side wall 200a is in airtight contact with the hub 14, so that steam can be shut off during the high-pressure steam sterilization process. Further, from this point of view, the closing member 200 may have a cylindrical shape including only the side wall 200a without the tip wall 200b.

15B is different from the

protectors

16 and 16A in that the closing member 210 has a structure in which the tip of the hub 14 is airtightly accommodated. Specifically, a groove portion 212 corresponding to the shape of the tip end of the hub 14 is provided on the base end surface of the closing member 210. The groove portion 212 accommodates the tip end of the hub 14 before and during use, and makes airtight contact. As a result, the closing member 210 can more reliably prevent vapor from entering the second space 86 and the arrangement space 25.

A protector 16C according to the fifth modification shown in FIG. 15C is different from the

protectors

16, 16A, and 16B in that a closing portion 220 (sealing member) is integrally formed inside the tip portion 76 of the wing member 20A. Prior to use, the closing part 220 closes the distal end of the housing cylinder 18 inward in the radial direction so as to penetrate the needle body 12 and make airtight contact with the outer peripheral surface of the needle body 12. The distal end of the hub 14 is in contact with the proximal end surface of the closing portion 220 before and during use. Even if comprised in this way, the vapor | steam which entered into the 1st space 62 will be interrupted | blocked in the obstruction | occlusion part 220, and the penetration | invasion of the vapor | steam to the 2nd space 86 or the arrangement | positioning space 25 can be prevented. Further, in the configuration in which the closing portion 220 is integrally formed with the wing member 20A, the number of parts is reduced, and the manufacturing cost and labor during manufacturing can be reduced. The shape of the closing portion integrally formed with the

wing members

20 and 20A is not limited to the illustrated example, and may be the same shape as the closing

members

54, 200, and 210.

Claims

A needle body (12);
A needle holder (14) for holding the needle body (12);
In the state before the puncture of the needle body (12), the needle holding portion (14) is accommodated to expose the needle body (12) from the distal end, and after the puncture, the proximal direction of the needle holding portion (14) A protector (16) having an accommodation space (60) for accommodating the needle body (12) with relative movement,
Between the needle holding part (14) and the protector (16), a blocking part (76, 100, 54) for blocking the flow of fluid is provided. Medical needle (10, 10A) 10B).
The medical needle (10) according to claim 1,
A cap (24) that is attached to the protector (16) before the needle body (12) is punctured and covers the needle body (12);
The protector (16) has a fitting part (76) made of an elastic body and configured as the blocking part at least at a place where the cap (24) is attached.
In a state before the needle body (12) is punctured, the needle holding portion (14) is in close contact with the entire inner peripheral surface of the fitting portion (76), and the cap (24) is attached to the fitting portion ( 76) A medical needle (10) characterized by being in close contact with the entire outer peripheral surface of (76).
The medical needle (10) according to claim 2,
The fitting portion (76) is sandwiched between the needle holding portion (14) and the cap (24) before the needle body (12) is punctured. 10).
The medical needle (10) according to claim 2,
The protector (16)
A rigid housing cylinder (18) surrounding the tip of the needle body (12) in the accommodated state of the needle body (12);
An elastic member (20) mounted on the housing cylinder (18) and having the fitting portion (76) protruding in the distal direction from the housing cylinder (18). 10).
The medical needle (10) according to claim 4,
The elastic member (20) is configured as a wing member having a shaft portion (74) attached to the housing cylinder (18) and a wing (22) protruding outward in the width direction from the shaft portion (74). ,
The medical needle (10), wherein the fitting portion (76) is integrally formed with the shaft portion (74).
The medical needle (10) according to claim 2,
An inner surface constituting the accommodation space (60) of the protector (16) and an outer surface of the needle holding portion (14) are in a state before the needle body (12) is punctured, and the base of the accommodation space (60). A medical needle (10) characterized by forming a closing structure (47) that suppresses the inflow of fluid to the distal end side of the accommodation space (60) by contacting each other on the end side.
The medical needle (10) according to claim 6,
The blocking structure (47) includes a tapered protruding end surface (47a) of a blocking wall (46b) protruding from the outer surface of the needle holding portion (14), and a tapered inner surface (47b) of the protector (16). A medical needle (10), characterized in that it is configured by contact.
The medical needle (10A) according to claim 1,
An elastic body that is configured as the blocking portion and contacts the entire outer periphery of the protector (16) on the outer peripheral surface of the needle holding portion (14) before the needle body (12) is punctured. A medical needle (10A), characterized in that a sealing member (100) comprising:
The medical needle (10A) according to claim 8,
The medical needle (10A), wherein the seal member (100) is disposed at a proximal end position in the accommodation space (60) before the needle body (12) is punctured.
[Correction 28.06.2016 under Rule 91]
The medical needle (10A) according to claim 9,
The needle holding portion (14) has a proximal end diameter-expanded portion (104, 106) that is expanded radially outward from the distal end portion of the needle holding portion (14),
The medical needle (10A), wherein the seal member (100) is arranged inside the proximal end diameter-enlarged portion (104, 106) before the needle body (12) is punctured.
The medical needle (10A) according to claim 8,
The medical needle (10A), wherein the seal member (100) is disposed at a distal end side position in the accommodation space (60) in a state before the needle body (12) is punctured.
The medical needle (10B) according to claim 1,
The protector (16) includes an accommodation cylinder (18) that constitutes the accommodation space (60),
In the accommodation cylinder (18), the needle body (12) is configured as the blocking section and contacts the needle holding section (14) before being punctured, and the inner circumference of the accommodation cylinder (18). A medical needle (10B), characterized in that a sealing member (54) made of an elastic body that seals the entire surface is provided.
The medical needle (10B) according to claim 12,
The sealing member (54)
In the inner peripheral surface of the storage cylinder (18), the needle body (12) is penetrated in a state before the needle body (12) is punctured,
A medical needle characterized by disposing the needle body (12) in the accommodation space (60) on the proximal end side with respect to the sealing member (54) in a state after the puncture of the needle body (12). (10B).
The medical needle (10B) according to claim 13,
The sealing member (54)
In contact with the outer peripheral surface of the needle body (12) in a state before the puncture of the needle body (12);
Furthermore, in the state where the needle body (12) is housed in the housing space (60), the portion of the needle body (12) that has passed through narrows or closes inwardly. ).
The medical needle (10B) according to claim 14,
The protector (16) has a blood reservoir (96) for collecting blood away from the needle body (12) on the distal end side of the position where the sealing member (54) is disposed. Needle (10B).
The medical needle (10B) according to claim 12,
The medical needle (10B), wherein the sealing member (54) is in contact with the entire outer peripheral surface of the needle holder (14) before the needle body (12) is punctured. .
The medical needle (10B) according to claim 12,
The said sealing member (54) consists of a member different from the said storage cylinder (18). The medical needle (10B) characterized by the above-mentioned.
The medical needle (10B) according to claim 12,
The medical needle (10B), wherein a cap (24) covering the needle body (12) is brought into close contact with the distal end portion of the protector (16) over the entire outer peripheral surface of the distal end portion.