WO2009059563A1

WO2009059563A1 - Safe vein indwelling needle

Info

Publication number: WO2009059563A1
Application number: PCT/CN2008/072944
Authority: WO
Inventors: Shiya Han
Original assignee: Amsino Medical Group Holdings Company Limited
Priority date: 2007-11-05
Filing date: 2008-11-05
Publication date: 2009-05-14
Also published as: CN201101798Y

Abstract

A safe vein indwelling needle includes an indwelling soft needle (21), a puncture steel needle (24), a steel needle base (25), a handle (3) and a needle sleeve (5). A center through hole (56) is provided in the needle sleeve (5) for containing the puncture steel needle (24) and the steel needle base (25), each of the two sidewall (52,53) of the needle sleeve (5) is provided with a sliding recess (54a,54b) symmetrically, the two sliding recesses (54a,54b) are opened at the rear end of the sidewall of the needle sleeve (5), lockpins(55a,55b) are provided symmetrically adjacent to the rear end of the sliding recess (54a,54b). The handle (3) includes a canal (31) communicated to the steel base (25) and two holding portions (32a,32b) provided at two sides of the canal (31), the canal (31) connects to each holding portion (32a,32b) through a sliding rail (38a,38b) sliding in the sliding recess (54a,54b) of the needle sleeve (5), each of the two sliding rail (34a,34b) is provided a lockhole (37a,37b) matching to the lockpin (55a,55b). When the puncturing is finished, the handle (3) slides backward, the tip of the puncture steel needle (24) hides in the center through hole (56) after the lockpin (55a,55b) fall into the lockhole (37a,37b) of the sliding rail (38a,38b).

Description

Safe venous indwelling needle

The present invention relates to intravenous indwelling needles, and more particularly to a safe venous indwelling needle that is clinically operable with one hand. Background technique

At present, a well-known intravenous indwelling needle is composed of a protective cap, a venous indwelling soft needle, a sputum steel needle, a gas permeable blood blocking membrane, and the like. In clinical use, the cap of the needle is removed, and the needle is placed through the sputum to guide the venous indwelling soft needle into the venous blood vessels of the human body. After seeing the blood return, confirm that the venous sputum is successful, and the sputum steel needle is taken out, and only the soft venous indwelling soft needle is kept in the venous blood vessel. The drug solution is introduced into the human body through a venous indwelling soft needle. The venous indwelling soft needle can be used during the safe stay of the human vein. This avoids the pain of frequent wearing of the patient.

However, when the conventional intravenous indwelling needle is used to pull out the steel needle in clinical operation, the steel needle tip stuck to the patient's blood is highly likely to cause accidental injury and infection to the medical staff and the patient; and the discarded bare steel is contaminated by the environment. It also creates difficulties for the special treatment of medical waste, which causes serious social security risks. Summary of the invention

The technical problem to be solved by the present invention is to overcome the above-mentioned shortcomings of the prior art, and to provide a safe type of venous indwelling needle which avoids the exposure of the needle tip of the steel needle during the process of withdrawing the threaded steel needle after the threading is completed.

The technical solution adopted by the invention is a safety type venous indwelling needle, which comprises a soft needle, a steel needle, a steel needle seat for placing a steel needle, a handle and a ventilating hemostatic component, and a soft needle sleeve. The utility model is characterized in that the safety type venous indwelling needle further comprises a needle sleeve, wherein the needle sleeve is provided with a central through hole for receiving the steel needle and the steel needle seat; the two side walls of the needle sleeve are symmetrically arranged Each of the sliding slots is provided with a sliding slot; the two sliding slots are open at the rear end of the side wall of the needle sleeve, and the locking tongues are respectively symmetrically disposed near the rear end of the sliding slot; the handle includes a conduit and is disposed on both sides of the conduit The two hand-held portions are respectively connected to the hand-held portions by a sliding rail which can slide in the sliding groove of the needle sleeve, and each of the two sliding rails is symmetrically provided with a locking hole adapted to the locking tongue; a central through hole is provided, and the front end of the conduit is connected with the steel needle seat; in the assembled state, the catheter and the steel needle seat are placed together in the central through hole of the needle sleeve, and the hand portion is disposed outside the needle sleeve, and the two sliding portions are disposed The rails are respectively embedded in the two chutes of the needle sleeve; after the punching is completed, the handle is swung backward, and when the locking tongue falls into the locking hole of the sliding rail, the needle tip of the steel needle is hidden in the central through hole of the needle sleeve in.

The beneficial effects of the invention are as follows: after the piercing is completed, the steel needle is drawn back, the handle is driven to drive through the steel needle to slide in the needle sleeve, and the needle tip of the steel needle is completely hidden in the central through hole of the needle sleeve. The tip of the needle is prevented from being exposed; at the same time, the handle and the piercing steel pin are locked by the locking tongue of the sliding groove provided on the two side walls of the needle sleeve and the locking hole provided on the handle rail. Moreover, the locking of the piercing steel needle can not be unlocked under normal use conditions, thereby protecting the medical staff, the patient and the environment: 1. Avoid wearing the tip of the steel needle to expose the medical staff and the patient; Prevent the exposed naked steel pin from polluting the environment; 3. Facilitate the special treatment of medical waste. BRIEF abstract

Features and capabilities of the present invention are further described by the following examples and the accompanying drawings.

Figure 1 is an exploded perspective view of a first embodiment of a safe venous indwelling needle of the present invention;

2A and 2B are respectively a perspective view and a front view of a needle cover according to a first embodiment of the present invention; and Fig. 2C is a cross-sectional view taken along line A-A of Fig. 2B;

Figure 2D is an enlarged view of the portion K of Figure 2C showing the locking tongue of the present invention;

3A to 3C are respectively a perspective view, a front view and a plan view of a handle according to a first embodiment of the present invention;

Figure 3D is a cross-sectional view taken along line A-A of Figure 3C;

Figure 4 is a schematic view of the appearance of the first embodiment of the present invention;

5A and FIG. 5B are respectively a front view and a top view of the steel needle of the first embodiment of the present invention after being safely locked;

6A and 6B are respectively a perspective exploded view and a schematic view of a second embodiment of the safe venous indwelling needle of the present invention;

7A and 7B are respectively a perspective view and a front view of a needle cover according to a second embodiment of the present invention; and Fig. 7C is a cross-sectional view taken along line C-C of Fig. 7B;

Figure 7D is an enlarged view of a portion P of Figure 7C;

Figure 8A is a perspective view of a handle of a second embodiment of the present invention;

Figure 8B is a side elevational view of Figure 8A;

Figure 8C is a cross-sectional view taken along line DD of Figure 8B; FIG. 9A is a front elevational view showing the second embodiment of the present invention after the steel needle is safely locked; FIG. 9B is a cross-sectional view taken along line EE of FIG. 9A. BEST MODE FOR CARRYING OUT THE INVENTION

Figure 1 shows an exploded perspective view of a safe venous indwelling needle of the present invention. As shown in the figure, the safety venous indwelling needle of the present invention comprises a protective cap 1, an indwelling soft needle 21, a threaded steel needle 24, a steel needle holder 25 for placing the threaded steel needle 24, a handle 3, and a gas permeable and blood blocking member 4. And the needle sleeve 5.

2A to 2C show the needle guard of the present invention. As shown, the needle guard 5 includes an upper wall 50, a lower wall 51 and two side walls 52, 53. The two side walls 52, 53 of the needle sleeve are symmetrically provided with a sliding groove 54a, 54b, and the sliding grooves 54a, 54b are open at the rear end portion of the side wall of the needle sleeve. The chutes 54a, 54b are symmetrically provided with locking tongues 55a, 55b, respectively, near their rear ends. The needle sleeve 5 is provided with a central through hole 56 for receiving the steel needle 24 and the steel needle holder 25. A boss 57 is provided at the front end of the upper surface of the needle sleeve 5, and one or more bosses 58 (three bosses are shown in the figure) on the upper surface behind the boss 57, these bosses They are all set up to facilitate the backward withdrawal of the steel needles in the clinic.

Figure 2D further illustrates the bolt 55b of the present invention. The locking tongue 55b is composed of a pair of oppositely disposed tabs 551, 552. The roots of the tabs 551, 552 are integrally formed with the side wall of the needle sleeve, and the top portions are respectively provided with chamfers 551b, 552b. The locking tongue 55a and the locking tongue 55b are symmetrical to each other and will not be described herein.

Referring to Figures 3A to 3D, the handle 3 includes a catheter 3 1 , two hand-held portions 32a, 32b disposed on both sides of the catheter 31 for finger gripping, and a catheter 3 1 and two hand-held portions 32a, respectively. Two slide rails 38a, 38b between 32b, two sides of the slide rail 38a are respectively connected with the duct 31 and the hand portion 32a, and the two sides of the slide rail 38b are respectively connected with the duct 31 and the hand portion 32b. Preferably, the front end 381a and the rear end 382a of the slide rail 38a and the front end 381b and the rear end 382b of the slide rail 38b are both wedge-shaped. Locking holes 37a, 37b which are adapted to the locking tongues 55a, 55b are provided symmetrically on the slide rails 38a, 38b. The hand-held portions 32a, 32b are in the shape of an arcuate surface recessed inwardly, and the upper and lower surfaces at the front end of the hand-held portion 32a are provided with claws 33a, 34a for elastically accommodating the needle cover 5 at the front end of the hand-held portion 32b. The lower surface is provided with claws 33b, 34b which elastically engage the needle sleeve 5. In the present embodiment, the pawl 33a is symmetrical with the pawl 33b, and the pawl 34a is symmetrical with the pawl 34b, and is in the hand portion 32a, 32b. There are multiple anti-slip strips on the finger contact surface. The catheter 31 is provided with a central through hole 31, and the front end of the catheter is in communication with the steel needle holder 25, and the rear end is connected to the gas permeable and blood blocking member 4, thereby connecting the handle 3 and the piercing needle 2 and the gas permeable and blood blocking member 4. Wear 剌 The needle 2 includes a piercing steel pin 24 and a steel needle holder 25. In a preferred embodiment, as shown in FIG. 1, the ventilating hemostatic member 4 includes a hollow seat body 41 and a permeable hemostatic membrane disposed in the cavity of the seat body 41. In another embodiment, the ventilating hemostasis member is a plug made entirely of a gas permeable, blood-blocking material that is sized to match the inner diameter of the central through-hole of the handle conduit 31 and can be tightly inserted into the rear end of the central through-bore of the catheter. , function to breathe and block blood.

Fig. 4 is a view showing the appearance of the safe intravenous indwelling needle of the present invention. When the product is assembled, the handle 3 and the piercing needle 2 and the ventilating hemostatic component 4 are integrally connected to each other, and then mounted from the rear end of the needle sleeve 5 to the needle sleeve 5, and the catheter of the handle and the steel needle seat are placed together in the needle sleeve 5 In the central through hole, the handle portions 32a, 32b of the handle are disposed outside the needle sleeve 5, and the two slide rails of the handle are respectively embedded in the two sliding grooves 54a, 54b of the needle sleeve, and the handle slide rails 38a, 38b are utilized. The tapered front ends 381a, 381b open the locking tongues 55a, 55b on the needle sleeve. The claws 33a, 33b and 34a, 34b on the hand portions 32a, 32b are attached to the upper and lower surfaces of the needle sleeve 5, elastically entangle the needle sleeve and can slide on the surface of the needle sleeve, thereby preventing the needle sleeve 5 from being externally supported. The role of opening. The center hole of the needle sleeve 5 is pierced by the steel needle 24, and is covered by the indwelling soft needle 21, and then covered with the cap 1.

When wearing the sputum, remove the protective cap 1, and lead the indwelling soft needle 21 through the sputum steel needle 24 to enter the human venous blood vessel. After the threading is completed, the handle 3 is slid back along the sliding grooves 54a, 54b on the needle sleeve 5, and the steel piercing needle 24 is withdrawn. During the process of withdrawing the steel needle, the thumb and the middle finger respectively pinch the handle. The two hand-held portions 32a, 32b, the index finger support boss 57 or the boss 58 obtain a supporting force for pulling the handle backward. When the locking tongues 55a, 55b on the opposite sides of the rear end of the needle sleeve 5 are caught in the locking holes 37a, 37b on the handle rail, as shown in Figs. 5A and 5B, the handle 3 and the threaded steel needle 24 and the needle sleeve 5 are locked. Together, the through-bolt pin 24 is completely contained within the central through-hole 56 of the needle guard. In a preferred embodiment of the present invention, the rear ends 382a, 382b of the slide rails 38a, 38b are wedge-shaped, and when the handle 3 is pulled back to withdraw the threaded steel needle 24, it is more advantageous for the slide rail to lock the tongue 55a. , 55b open, making the locking process smoother. When the bolts 55a, 55b are distracted and then fall into the keyholes 37a, 3b, a crisp sound is heard to indicate that the locking is successful. In addition, the claws 33a, 33b and 34a, 34b of the upper and lower surfaces of the handle portion of the handle are slid on the upper and lower surfaces of the needle sleeve 5, and the needle sleeves on both sides of the chute are fixed to prevent the external force from being opened. Thereby, the external force is prevented from unlocking the lock tongue and the lock hole.

Since the piercing steel needle 24 is locked in the central through hole 56 of the needle sleeve, the medical staff and the patient can be protected from being accidentally injured and infected by the steel needle. The locked and built-in threaded steel needle 24 can be used with the handle 3 and the needle sleeve 5 - and discarded, and the locking of the threaded steel needle is not unlockable under normal use conditions, and thus can Effectively avoid wearing the steel pin to expose people, and also provide safety for the disposal of used medical supplies. 7A to 9B show a second embodiment of the present invention. In the second embodiment of the present invention, the shapes of the indwelling soft needle 21, the steel needle holder 25, the handle 3, the gas permeable and blood blocking member 4, and the needle cover 5 are different from those of the first embodiment. In the first embodiment, the boss 57 is disposed at the front end of the upper surface of the needle cover 5, and as shown in FIGS. 7A and 7B, in the second embodiment, the boss 57 is disposed on the needle cover 5. The surface is near the front end. The joint 5b at the front end of the needle sleeve 5 is in the shape of a truncated cone which is adapted to the inner hole of the indwelling soft needle 21 to facilitate the placement of the indwelling soft needle 21 on the joint 5b. At the front end of the upper wall 50 of the needle sleeve 5, there is further provided a fixing hook 59 extending forward. When the indwelling soft needle 21 is sleeved on the joint 5b, the fixing hook 59 can be hooked to the ring and disposed on the circumferential direction of the indwelling soft needle 21. The flange 211 at the rear end of the outer wall serves to fix the indwelling soft needle 2. The center through hole 56 of the needle sleeve 5 is a through hole having a reduced diameter, and is composed of a center through hole 561 of the joint 5b and a center through hole 562 of the needle cover body 5a (as shown in Fig. 9B). As shown in FIG. 7C and FIG. 7D, the shape and structure of the chute and the bolt of the second embodiment of the present invention are the same as those of the first embodiment, and details are not described herein again.

8A to 8D show the handle 3 of the second embodiment of the present invention. As shown in Fig. 9B, the center through hole 311 of the duct 31 of the handle 3 is a stepped hole including a small aperture portion 3111 and a large aperture portion 3112. The end portion of the steel needle holder 25 extends through the small aperture portion 3111 into the large aperture portion 3112, and the rear end of the threaded steel needle 24 projects from the steel needle holder 25 and projects into the large aperture portion 3112 to be worn. The blood generated by the sputum flows into the large-aperture portion 3112 through the center through hole of the squeezing steel needle 24, so that the blood return in the large-aperture portion 3112 can be clearly observed through the catheter made of transparent plastic. A plug made of a gas permeable and hemostatic material is inserted at the rear end of the large aperture portion 3112, and serves as a ventilating hemostatic member 4 to both ventilate and stop bleeding, and also serves as a sealing function.

While the present invention has been described with respect to the specific embodiments, it is understood that the invention is not limited to the embodiments described herein, and various modifications and changes may be made without departing from the spirit and scope of the invention. Industrial applicability

The beneficial effects of the present invention over the prior art are:

1. Avoid wearing the tip of the steel needle and accidentally injuring the medical staff and patients;

2. Prevent the exposed bare steel pin from polluting the environment;

3. Facilitate the special treatment of medical waste.

Claims

Rights request

A safety type venous indwelling needle, comprising an indwelling soft needle, a threading steel needle, a steel needle holder for placing the threaded steel needle, a handle and a ventilating hemostatic component, the indwelling soft needle sleeve being placed on the needle On a steel needle, characterized in that

The safety type venous indwelling needle further includes a needle sleeve, wherein the needle sleeve is provided with a central through hole for receiving the threaded steel needle and the steel needle seat; the two side walls of the needle sleeve are symmetrically disposed a sliding groove; the two sliding grooves are open at a rear end portion of the side wall of the needle sleeve, and the locking tongues are respectively symmetrically disposed near the rear end of the sliding groove;

The handle includes a conduit and two hand-held portions disposed on two sides of the conduit, and the conduits are respectively connected to the hand-held portions by a slide rail that can slide in the sliding slot of the needle sleeve, in two Symmetrically, each of the slide rails is provided with a lock hole adapted to the lock tongue; the duct is provided with a central through hole, and a front end of the duct is connected with the steel needle seat;

In the assembled state, the catheter and the steel needle seat are placed together in the central through hole of the needle sleeve, the hand-held portion is disposed outside the needle sleeve, and the two sliding rails are respectively embedded in the two sliding grooves of the needle sleeve;

After the threading is completed, the handle is slid backward, and when the locking tongue falls into the locking hole of the sliding rail, the needle tip of the threaded steel needle is hidden in the central through hole of the needle sleeve.

2. The safety venous indwelling needle according to claim 1, wherein each of the locking tongues is composed of a pair of oppositely disposed tabs, and the root of each of the tabs is integrated with the side wall of the needle sleeve. .

The safety type venous indwelling needle according to claim 2, wherein a top portion of each of the tabs is chamfered.

The safety type venous indwelling needle according to claim 1, wherein the front end and the rear end of each of the slide rails are wedge-shaped.

5. The safety venous indwelling needle according to claim 1, wherein the upper and lower surfaces of the two hand-held portions of the handle are elastically held by the upper and lower surfaces of the handle.

The safety venous indwelling needle according to claim 1 , wherein the ventilating hemostatic member comprises a seat body and a ventilated hemostatic membrane, wherein the seat body is provided with a cavity, and the ventilating hemostatic membrane is disposed on the In the cavity; the seat is in communication with the rear end of the conduit of the handle.

The safety type venous indwelling needle according to claim 1, wherein a plurality of bosses disposed at an upper portion of the needle sleeve perpendicular to the axial direction of the needle sleeve are provided.