WO2014194541A1

WO2014194541A1 - Disposable outer periphery sleeve infusion device

Info

Publication number: WO2014194541A1
Application number: PCT/CN2013/078314
Authority: WO
Inventors: 张建林
Original assignee: 南通恒泰医疗器材有限公司
Priority date: 2013-06-03
Filing date: 2013-06-28
Publication date: 2014-12-11
Also published as: AU2013391895A1

Abstract

A disposable outer periphery sleeve infusion device comprises a vein puncture needle component (1), and a medicament liquid filter (3), a flow rate regulator (4), a drip kettle (5) and a bottle plug puncture device (6) which are connected in sequence through hoses. The infusion device also comprises a catheter component (2), the catheter component (2) being directly or indirectly connected with the medicament liquid filter (3). By the catheter component (2), a steel needle (11) is pulled out and a catheter (21) is remained in vivo after vein puncture. When a patient moves restlessly or changes body positions, the catheter (21) would not damage a blood vessel. The vein puncture needle (1) is directly or indirectly connected with the medicament liquid filter (3), and different connection modes can be selected aiming at different situations.

Description

Single-use peripheral cannula infusion set

Technical field

The present invention relates to an infusion set, and more particularly to a disposable peripheral cannula infusion set.

Background technique

A disposable infusion set is a commonly used disposable medical consumable that is primarily used for intravenous infusion to establish a passage between the vein and the drug solution.

Traditional venipuncture needles are made of steel with a sharp tip at the front end to reduce the pain of the patient during puncture. In the case of intravenous infusion, there are certain disadvantages: when the patient is agitated or changes position, the steel needle is easy to cause damage to the blood vessel, causing bleeding, and the infusion cannot be performed smoothly, and the puncture needs to be re-pierced, and the medical staff and the patient bring great inconvenient.

In addition, the connection between the venipuncture needle and the liquid medicine filter is single, and different connection methods cannot be selected for different situations, which causes inconvenience in manufacturing and use.

Summary of the invention

The technical problem to be solved by the present invention is to provide a single-use peripheral cannula infusion device which has a wide application range and is not easy to cause damage to a patient, and has a plurality of connection modes of a venipuncture needle and a medical liquid filter.

In order to solve the above technical problem, the technical solution of the present invention is: A single-use peripheral cannula infusion set comprising a venipuncture needle assembly and a serially connected liquid filter, a flow rate adjuster, a drip pot and a stopper puncturing device through an infusion hose; the venipuncture needle assembly comprises a steel needle and a steel a steel needle holder at the end of the needle, and a needle holder on the steel needle holder, characterized in that it further comprises a catheter assembly, the catheter assembly comprising a catheter holder, a catheter and a spacer, the catheter holder having a cavity disposed in the axial direction, The front end of the catheter hub is connected to the end of the catheter through the catheter fixing core, and the catheter is connected to the cavity of the catheter hub; the isolation plug is inserted into the rear port of the catheter socket; and the inlet port is provided in the middle of the catheter socket The infusion hose is connected; the tip of the needle extends in the axial direction of the catheter hub from the end of the catheter hub through the isolation plug, the lumen of the catheter adapter, and the catheter.

In some embodiments, the inlet port of the catheter hub and the outlet end of the drug solution filter are connected in one piece by an infusion hose.

In some embodiments, the inlet port of the catheter hub and the drug solution filter are separated by a separable indirect connection structure.

In some embodiments, the connection joint is a two-way or three-way joint, one of the interfaces is a liquid outlet interface, and the remaining interface is a liquid inlet interface; the liquid outlet interface of the connection joint passes through the infusion hose and the inlet port of the catheter socket The connection is a unitary structure, and the inlet interface of the connection joint is provided with either or both of a cap seal cap, a plug seal cap or a heparin cap.

In some embodiments, the liquid inlet port of the connection joint to which the cap type sealing cap is mounted is coupled with the liquid supply end of the liquid medicine filter to achieve conduction.

In some embodiments, the inlet interface of the connection joint to which the cap seal cap is mounted and the liquid outlet end of the liquid chemical filter are connected by a Ruerner and an outer conical joint structure.

In some embodiments, the connection joint inlet interface and the lid seal cap are sealingly connected using a Ruerner and an outer conical joint structure.

In some embodiments, the inlet port of the connector is sealingly coupled to the plug cap, the plug cap is formed by a soft sealing plug and a centrally open locking cap, the soft sealing plug being placed in the locking cap Internally; a scalp needle capable of passing through the soft sealing plug into the connection joint is connected to the liquid chemical filter.

In some embodiments, the connector inlet interface is in sealing engagement with the heparin cap; a scalp needle that is configured to pass through the heparin cap into the connector is attached to the drug solution filter.

In some embodiments, the fluid interface of the connector is sealingly coupled to the heparin cap using a Luer and outer conical joint structure.

In some embodiments, an integral flat handle is provided on the outside of the connector.

In some embodiments, a development line is disposed on the catheter.

In some embodiments, a cylindrical locating projection is provided at the forward end of the steel hub that fits snugly into the end opening of the catheter adapter.

In some embodiments, an air filter is connected through the intake tube on one side of the stopper puncturing device.

In some embodiments, a stop clip is provided on the hose adjacent the inlet port of the catheter adapter.

The invention has the advantages that: on the basis of the traditional intravenous infusion needle, the catheter assembly is increased, after the venipuncture, the steel needle is pulled out, the catheter is left in the body, and the infusion channel infusion through the infusion joint, the hose, the catheter seat and the catheter is used. The catheter is soft and has a development line, which can be clearly seen under X-ray, easy to operate and fix, and when the patient is agitated or changed position, the sleeve is not easy to slip and damage the catheter, which is convenient for administration, and rescues critically ill patients. The blood transfusion of shock patients provides an effective treatment channel, which greatly facilitates the doctors and patients. The venipuncture needle is directly or indirectly connected to the liquid medicine filter, and different connection modes can be selected for different situations, and a connection joint with a cap type sealing cap, a plug seal cap or a heparin cap can be selected for manufacturing and use. More flexible and convenient.

DRAWINGS

1 is a schematic view showing the overall structure of a first embodiment of the present invention;

Figure 2 is an enlarged view of the portion A of Figure 1 (the assembly structure of the venipuncture needle assembly and the catheter assembly);

Figure 3 is a schematic structural view of the catheter assembly of Figure 1;

Figure 4 is a schematic structural view of the venipuncture needle assembly of Figure 1;

Figure 5 is a schematic view showing the overall structure of a second embodiment of the present invention;

Figure 6 is a schematic structural view of the (two-way) connection joint of Figure 5;

Figure 7 is a schematic view showing the structure of a joint joint with a cap type sealing cap according to the present invention;

Figure 8 is a schematic view showing the structure of a joint joint with a plug seal cap according to the present invention;

Figure 9 is a schematic view showing the structure of a joint having a heparin cap according to the present invention;

Figure 10 is a schematic view showing the structure of a joint of another (three-way) structure of the present invention.

detailed description

As shown in FIG. 1 to FIG. 4, a first embodiment of a single-use peripheral cannula infusion set of the present invention comprises a venipuncture needle assembly 1, a catheter assembly 2, a medical fluid filter 3, a flow rate regulator 4, and a drop. The kettle 5 and the stopper puncture device 6 and the intake pipe air filter 7 are connected in series through the infusion hose 9 on the liquid inlet port 23 of the catheter assembly 2 of the catheter assembly 2, the liquid medicine filter 3, the flow rate regulator 4, and the drip pot. 5 and a stopper puncture device 6, and the air filter 7 is connected to the side of the stopper puncture device 6 through an intake pipe. A flow stop clip 10 is disposed on the hose 9 between the catheter assembly 2 and the medical fluid filter 3.

Referring to Figures 2 and 3, the catheter assembly 2 includes a catheter hub 22, a catheter 21, a spacer plug 24, a catheter fixation core 25, and a branch interface on one side of the catheter hub 22 as a fluid inlet port 23, forming a y-shape. The transparent three-way structure has a cavity disposed in the axial direction in the catheter seat 22, and the front end of the catheter seat 22 is connected to the catheter 2 through the conical catheter fixing core 25, and the front end of the catheter 2 and the catheter seat 22 (ie, in FIG. 3) The lower end is connected, and the developing line is provided on the duct 21. The isolation plug 24 is inserted into the rear port of the catheter hub 22, and the isolation plug 24 is spaced a short distance from the distal end of the catheter adapter 22 (a recess is formed at the end of the catheter adapter 22). A liquid inlet port 23 is provided in the middle of the catheter hub 22.

Referring to Figures 2 and 4, the venipuncture needle assembly 1 includes a steel needle 11 and a steel needle hub 12 at the end of the steel needle, and a needle holder 13 is provided on the steel needle holder 12. The front end of the steel needle holder 12 (lower end in Fig. 4) is provided with a cylindrical positioning projection 14 for fittingly fitting into the mouth of the end of the catheter holder 11 (i.e., the upper end in Fig. 3).

In use, the tip end of the steel needle 11 extends from the end of the catheter hub 22 through the isolation plug 24, the cavity of the catheter hub 22, and the catheter 21 in the axial direction of the catheter hub 22, and then projects from the lower end (see Fig. 2). The venipuncture needle assembly 1 and the catheter assembly 2 constitute a cannulated venous puncture needle, and its working principle is:

Prior to puncture, the cylindrical positioning projection 14 of the steel hub 12 is inserted into the end opening of the catheter hub 22, and the tip end of the steel needle 11 on the needle hub 12 can pass through the isolation plug from the end of the catheter adapter in the axial direction of the catheter hub 22. 24. The cavity in the catheter hub 22 and the catheter 21 extend rearward.

After the puncture, the catheter 21 enters the vein together with the steel needle 11, and after the steel needle 11 is pulled out, the catheter 21 is left in the vein, and the drug solution enters the vein through the infusion channel composed of the hose 9, the catheter hub 22, and the catheter 21.

In the above embodiment, the liquid inlet port 23 of the catheter hub 22 is directly connected to the outlet end of the liquid chemical filter 3 through the hose 9 as a single body.

Referring to FIG. 5, the inlet port 23 of the catheter hub 22 can also be indirectly connected to the liquid chemical filter 3, that is, the inlet port 23 of the catheter hub 22 and the liquid chemical filter 3 are indirectly connected through the connection joint 8, and the connection structure is Separable.

Referring to Figure 6, the connecting joint 8 is a two-way joint, wherein the lower end interface is a liquid outlet interface 82, the upper end interface is a liquid inlet interface 81, and an integrally formed flat handle 83 is provided in the middle. The outlet port 82 of the connector 8 is directly connected to the inlet port 23 of the catheter hub 22 via a hose 9, and the inlet port 82 of the connector 8 is fitted with a cap-type sealing cap 84, a plug seal cap 85 or a heparin cap 86. Any of them. The function of the cap seal cap 84 is to seal the liquid inlet port of the joint 8 after the liquid filter 3 is removed.

The liquid inlet port 81 of the connecting joint 8 shown in FIG. 6 and FIG. 7 (after the cap sealing cap 84 is removed) can be connected with the liquid discharging end of the liquid chemical filter 3, and the cap sealing cap 84 is closed to realize the connection. Sealing of the inlet port 81 of the joint 8.

The liquid inlet interface 81 of the connecting joint 8 of the present embodiment can adopt a Luer conical joint structure, and the liquid discharging end of the liquid chemical filter 3 is connected and electrically connected by a Ruer outer conical joint structure matched with the liquid inlet interface 81. The cover seal cap 84 and the joint 8 can also be connected by a Ruer outer taper joint structure.

As shown in FIG. 8, the liquid inlet port 81 of the connection joint 8 with the plug seal cap 85 can also be sealingly connected by the plug seal cap 85. The plug seal cap 85 includes a soft sealing plug 851 and a central opening locking cap 852. The inner cavity of the inlet port 81 of the connecting joint 8 is stepped (expanded), and the soft sealing plug 851 is built in the stepped cavity. The lock cap 852 is installed outside the liquid inlet port 81 of the joint 8 (the two are engaged by the concave-convex structure 853), and the soft sealing plug 9b1 is restrained.

Meanwhile, when the connecting joint 8 with the plug cap 85 is used, the ejector pin (not shown) which can pass through the soft sealing plug 851 into the connecting joint 8 is connected to the outlet of the liquid chemical filter 3. Thus, the connector 8 with the plug seal cap 85 can be used directly for an infusion set or syringe connection with a conventional scalp needle.

As shown in Fig. 9, the connection port 8 of the heparin cap 86 is connected to the heparin cap 86 to achieve sealing. The heparin cap 86 is a well-known structure of a medical device and will not be described here.

Meanwhile, when the connecting joint 8 equipped with the heparin cap 86 is used, the medicinal fluid filter 3 is connected with a scalp needle (not shown) which can pass through the heparin cap 86 into the connecting joint 8. The inlet interface 81 of the connection joint 8 of the present embodiment and the heparin cap 86 can also be connected and sealed by using a Ruerner and an outer conical joint structure.

Those skilled in the art will appreciate that the construction of the above described connector 8 is merely exemplary and not limiting. For example, the connection joint 8 can also adopt a three-way structure as shown in FIG. 10, one of which is a liquid outlet interface 82, and the other two interfaces 81 and 81' serve as a liquid inlet interface. The liquid outlet port 82 of the connector 8 is directly connected to the inlet port 23 of the catheter hub 22 via a hose 9, and the two inlet ports of the connector 8 can be fitted with a cap seal cap 9a, a plug seal cap 9b or a heparin cap. Any two of 9c. In Fig. 10, the two liquid inlet ports 81 and 81' of the joint 8 are respectively provided with a cap seal cap 84 and a heparin cap 85, which can be respectively connected with a needle type infusion set and a needleless type infusion set, thereby expanding the application range.

Claims

A single-use peripheral cannula infusion set comprising a venipuncture needle assembly and a serially connected liquid filter, a flow rate adjuster, a drip pot and a stopper puncturing device through an infusion hose; the venipuncture needle assembly comprises a steel needle and a steel a steel needle holder at the end of the needle, and a needle holder on the steel needle holder, characterized in that it further comprises a catheter assembly, the catheter assembly comprising a catheter holder, a catheter and a spacer, the catheter holder having a cavity disposed in the axial direction, The front end of the catheter hub is connected to the end of the catheter through the catheter fixing core, and the catheter is connected to the cavity of the catheter hub; the isolation plug is inserted into the rear port of the catheter adapter; the inlet port is provided in the middle of the catheterization seat The infusion hose is connected; the tip of the steel needle extends from the end of the catheter hub in the axial direction of the catheter hub through the isolation plug, the lumen of the catheter adapter, and the catheter.
The single-use peripheral cannula infusion set according to claim 1, wherein the inlet port of the catheter hub and the liquid outlet of the medical fluid filter are connected to each other through an infusion hose.
The single-use peripheral cannula infusion set according to claim 1, wherein a detachable indirect connection structure is adopted between the inlet port of the catheter hub and the liquid chemical filter through the connection joint.
The single-use peripheral cannula infusion set according to claim 3, wherein the connecting joint is a two-way or three-way joint, one of the interfaces is a liquid outlet interface, and the remaining interfaces are liquid inlet interfaces; The liquid outlet interface is integrally connected with the liquid inlet port of the catheter socket through an infusion hose, and the liquid inlet interface of the connection joint is installed with either or both of a cap seal cap, a plug seal cap or a heparin cap.
The single-use peripheral cannula infusion set according to claim 4, wherein the liquid inlet port of the connection joint on which the cap type sealing cap is mounted is coupled with the liquid outlet end of the liquid medicine filter to achieve conduction.
The single-use peripheral cannula infusion set according to claim 5, wherein the inlet port of the connection joint to which the cap seal cap is mounted and the liquid supply end of the liquid filter are used, The outer conical joint structure is connected to conduct.
The single-use peripheral cannula infusion set according to claim 5, wherein the connection joint inlet port and the cap seal cap are sealingly connected by a luer inner and outer conical joint structure.
The single-use peripheral cannula infusion set according to claim 4, wherein the inlet port of the connecting joint is sealingly connected with the plug sealing cap, and the plug sealing cap is sealed by a soft body plug and the center is opened. The locking cap of the hole is formed, and the soft sealing plug is placed in the locking cap; a scalp needle capable of passing through the soft sealing plug into the connecting joint is connected to the liquid chemical filter.
The single-use peripheral cannula infusion set according to claim 4, wherein the connection port of the connection port is sealingly connected with the heparin cap; and the liquid filter is connected to the heparin cap. Connect the scalp needle inside the connector.
The single-use peripheral cannula infusion set according to claim 9, wherein the inlet interface of the connection joint and the heparin cap are sealingly connected by a Ruerner and an outer conical joint structure.
According to claim 4 A single-use peripheral cannula infusion set according to any of the preceding claims, characterized in that an integral flat handle is provided on the outside of the connecting joint.
A single-use peripheral cannula infusion set according to claim 1, wherein a developing line is disposed on said catheter.
The disposable peripheral cannula infusion set according to claim 1, wherein a cylindrical positioning projection is disposed at a front end of the steel needle holder to be fitted into the distal end of the catheter hub.
The disposable peripheral cannula infusion set according to claim 1, wherein an air filter is connected to one side of the stopper puncture through an intake pipe.
A single use peripheral cannula infusion set according to claim 1 wherein a stop clip is provided on the hose adjacent the inlet port of the catheter hub.