CN218923428U

CN218923428U - Peripheral venous catheter assembly for medium-long-term retention

Info

Publication number: CN218923428U
Application number: CN202222676004.4U
Authority: CN
Inventors: 付健; 刘海沛; 翟近涛; 田晓雷
Original assignee: Shandong Ande Medical Supplies Co ltd
Current assignee: Shandong Ande Medical Supplies Co ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-04-28
Anticipated expiration: 2032-10-11

Abstract

The utility model relates to a peripheral venous catheter assembly for medium-long term retention, and belongs to the technical field of medical appliances for medium-long term venous transfusion. The needle tube one end is equipped with the blade, including handle, casing, pipe subassembly, needle tubing and propelling movement seat, the handle sets up in casing one end in advance, and the inside fixed needle tubing that sets up of casing, the needle tubing pass the inside through-hole that sets up of handle, and the activity sets up pipe subassembly between casing and the needle tubing, and the one end that the handle was kept away from to pipe subassembly is equipped with the propelling movement seat, and pipe subassembly slides along the needle tubing in the casing. The utility model provides a peripheral venous catheter assembly for medium-long term indwelling, which has the length of the catheter reaching 60mm-120mm, is simple and convenient to operate, can realize the peripheral venous catheter assembly of a deep vascular cannula, and meets the requirements of medium-long term vascular access.

Description

Peripheral venous catheter assembly for medium-long-term retention

Technical Field

The utility model relates to a peripheral venous catheter assembly for medium-long term retention, and belongs to the technical field of medical appliances for medium-long term venous transfusion.

Background

The catheter is a device which is sleeved on a puncture needle and is conveyed into a blood vessel together with the puncture needle through tissues such as skin, fat layers and the like, and the puncture needle is withdrawn after the catheter enters the blood vessel, so that the front end of the catheter is left in the blood vessel.

The PIVC of the prior art has shorter length, usually 15mm-50mm, and is generally placed on peripheral veins at the movable positions of the wrist, the forearm and the like, the dislocation risk of the catheter at the positions is higher, and meanwhile, the movement of the wrist and the forearm also easily causes the folding and the blood return of the catheter, so that the catheter is blocked and pulled out. In addition, also because of the short length, the outlet position of the catheter can only be positioned in the shallow veins with tiny periphery, and after the medicine enters the blood vessel from the outlet of the catheter, the blood flow at the positions is small, and the medicine is delayed to cause continuous stimulation to the blood vessel, so that inflammatory reaction is easy to be caused.

The PIVC in the prior art has higher incidence rate of complications (phlebitis, tube blockage, dislocation and the like), so that the average retention time is not more than 96 hours, new PIVC is needed to be replaced by tube drawing after the complications occur, and the requirement of medium-long-term (7-30 days) vascular access is not met.

Disclosure of Invention

The utility model aims to solve the technical problems that: overcomes the defects of the prior art, provides a peripheral venous catheter assembly which is reserved for a medium and long time, has the catheter length of 60mm-120mm, is simple and convenient to operate, can realize the peripheral venous catheter assembly of a deep vascular cannula, and meets the requirements of medium and long-term vascular access.

The utility model relates to a peripheral intravenous catheter assembly for long-term retention, which is characterized in that one end of a needle tube is provided with a cutting edge, the peripheral intravenous catheter assembly comprises a handle, a shell, a catheter assembly, the needle tube and a pushing seat, the handle is arranged at one end of the shell in advance, the needle tube is fixedly arranged in the shell, the needle tube penetrates through a through hole arranged in the handle, the catheter assembly is movably arranged between the shell and the needle tube, one end, far away from the handle, of the catheter assembly is provided with the pushing seat, and the catheter assembly slides along the needle tube in the shell;

the catheter assembly comprises a catheter and a catheter seat, the catheter and the catheter seat are sleeved outside the needle tube, one end of the catheter is fixedly provided with the catheter seat, and when the catheter assembly is in a first position, the cutting edge at one end of the needle tube extends out of the most distal end of the catheter; when the catheter assembly is in the second position, an anchoring connection is formed between the catheter hub and the handle; when the handle is separated from the shell, the handle drives the catheter assembly to slide along the needle tube until the catheter assembly is thoroughly separated from the needle tube.

Working process or working principle:

during assembly, the needle tube is fixed in the shell, the catheter assembly is inserted into the pushing seat, the needle tube sequentially penetrates through the pushing seat and the catheter assembly, the pushing seat is screwed into the clamping groove of the shell, and the handle is sleeved into the shell.

In use, after the peripheral vein position is confirmed, the needle tip of the needle tube pierces the blood vessel, then the pushing seat is pushed, and when the catheter assembly moves to the handle position along the chute, the handle is matched with the catheter seat. The handle is pushed outwardly and moves with the catheter assembly and the push seat, separate from the housing. And then the handle is broken off, and the handle is separated, so that the separation of the handle from the pushing seat and the catheter assembly is realized, and finally the pushing seat is taken down, the catheter assembly is reserved, and the tube placement is completed.

Further, a clamping plate is arranged on the catheter seat, a clamping hook matched with the clamping plate is arranged at one end of the handle, and the clamping plate and the clamping hook realize anchoring connection between the catheter seat and the handle.

Further, clamping arms are arranged on two side surfaces of one end of the shell, and clamping tables matched with one end of the clamping arms are arranged on two sides of the handle.

Further, the clamping arm comprises a matching end, a supporting end and a pressing end, a gap is reserved between the matching end and the pressing end and between the clamping end and the shell, two end faces of the supporting end are connected with the shell, the matching end is matched with the clamping table, the supporting end is supported by the pressing end, the matching end is separated from the clamping table, and the handle is separated from the shell.

Further, the diameter of the conduit is matched with the diameter of the through hole, and the conduit is connected in a sliding way in the through hole.

Further, the handle is provided with a weak connection which can be manually torn to divide the handle into two parts.

Further, one end of the catheter seat, which is far away from the catheter, is provided with a conical hole, and one end of the pushing seat is provided with an outer conical column which is matched with the conical hole.

Further, the two ends of the handle are provided with stop ribs, and a sliding groove matched with the stop ribs is formed in the shell.

Further, the needle cannula cutting edge extends from 20mm to 50mm in length beyond the handle portion when the catheter assembly is in the first position.

Further, the needle cannula cutting edge extends from 0.25mm to 0.65mm of the catheter length when the catheter assembly is in the first position.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model realizes the sectional insertion of the long catheter into the blood vessel by designing the handle capable of reducing the puncture force arm, the shell and the handle which can be selectively separated, the handle and the catheter seat which can be mutually and selectively anchored and connected and the catheter assembly which can slide along the needle tube.

2. The utility model has the advantages that the length of the catheter can reach 60mm-120mm by arranging the catheter component and the handle, the operation is simple and convenient, the peripheral venous catheter component of the deep vascular cannula can be realized, and the requirement of medium-long-term vascular access is met.

Drawings

FIG. 1 is a schematic view showing the structure of a first position according to embodiment 1 of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic view of the structure of embodiment 1 in the second position;

FIG. 5 is a schematic view of the structure of the present utility model after being pushed out;

FIG. 6 is a schematic view of the handle structure of the present utility model;

FIG. 7 is an enlarged view of a portion of FIG. 6 at B;

FIG. 8 is a schematic view of a push seat according to the present utility model;

FIG. 9 is a schematic view of the housing structure of the present utility model;

FIG. 10 is an enlarged view of a portion of FIG. 9 at C;

FIG. 11 is a schematic view of a catheter assembly of the present utility model;

FIG. 12 is a second schematic view of a catheter assembly of the present utility model;

FIG. 13 is a schematic diagram of the operation of embodiment 1 of the present utility model;

FIG. 14 is a second schematic operation of embodiment 1 of the present utility model;

FIG. 15 is a third schematic diagram of the operation of example 1 of the present utility model;

FIG. 16 is a fourth schematic diagram of the operation of example 1 of the present utility model;

FIG. 17 is a fifth working diagram of example 1 of the present utility model;

FIG. 18 is a sixth working diagram of example 1 of the present utility model;

FIG. 19 is a seventh schematic diagram of the operation of embodiment 1 of the present utility model;

FIG. 20 is a schematic diagram eight of the operation of example 1 of the present utility model;

in the figure: 1. a needle tube; 2. a catheter assembly; 3. a handle; 4. a housing; 5. a pushing seat;

11. a blood inlet; 21. a conduit; 22. a clamping plate; 23. a catheter holder; 24. a threaded section; 25. conical holes; 31. a clamping hook; 32. a clamping table; 33. stop ribs; 34. weak connection; 35. a through hole; 41. anti-skid lines; 42. a mating end; 43. a support end; 44. a pressing end; 45. a notch; 46. a clamping groove; 47. a chute; 51. conical columns; 401. and a clamping arm.

Detailed Description

Example 1

As shown in fig. 1 to 12, one end of a needle tube 1 of the peripheral venous catheter assembly for long-term retention in the utility model is provided with a sharp cutting edge, the peripheral venous catheter assembly comprises a handle 3, a shell 4, a catheter assembly 2, the needle tube 1 and a pushing seat 5, the handle 3 is arranged at one end of the shell 4 in advance, the needle tube 1 is fixedly arranged in the shell 4, the needle tube 1 passes through a through hole 35 arranged in the handle 3, the catheter assembly 2 is movably arranged between the shell 4 and the needle tube 1, one end of the catheter assembly 2, far from the handle 3, is provided with the pushing seat 5, the catheter assembly 2 slides in the shell 4 along the needle tube 1, the outer surface of the shell 4 at the joint of the shell 4 and the handle 3 is provided with an anti-skid thread 41, the outer surface of the shell 4 is provided with a notch 45, the pushing seat 5 slides in the notch 45 is arranged along the axial direction of the shell 4, one end, far from the handle 3 is provided with a clamping groove 46, the clamping groove 46 is used for positioning the pushing seat 5, the pushing seat 5 is prevented from moving in the shell, and the pushing seat 5 is rotated to the notch 45 when needed; the upper front end of the needle tube 1 is provided with a blood inlet 11, the blood inlet 11 is used for blood flow, and the blood easily flows into the catheter 21.

The catheter assembly 2 comprises a catheter 21 and a catheter seat 23, the catheter 21 and the catheter seat 23 are sleeved outside the needle tube 1, one end of the catheter 21 is fixedly provided with the catheter seat 23, and when the catheter assembly 2 is in a first position (shown in figure 1), the cutting edge of one end of the needle tube 1 extends out of the most distal end of the catheter 21; when the catheter assembly 2 is in the second position (as shown in fig. 4), an anchoring connection is formed between the catheter hub 23 and the handle 3; when the handle 3 is separated from the housing 4, the handle 3 drives the catheter assembly 2 to slide along the needle cannula 1 until the catheter assembly 2 is completely separated from the needle cannula 1.

The catheter holder 23 is provided with a clamping plate 22, one end of the handle 3 is provided with a clamping hook 31 matched with the clamping plate 22, and the clamping plate 22 and the clamping hook 31 realize anchoring connection between the catheter holder 23 and the handle 3.

Clamping arms 401 are arranged on two side surfaces of one end of the shell 4, and clamping tables 32 matched with one end of the clamping arms 401 are arranged on two sides of the handle 3.

The clamping arm 401 comprises a matching end 42, a supporting end 43 and a pressing end 44, a gap is reserved between the matching end 42 and the pressing end 44 and between the clamping arm and the shell 4, two end surfaces of the supporting end 43 are connected with the shell 4, the matching end 42 is matched with the clamping table 32, the supporting end 43 supports the clamping end 44 through pressing, the matching end 42 is separated from the clamping table 32, and the handle 3 is separated from the shell 4.

The diameter of the conduit 21 is matched with the diameter of the through hole 35, and the conduit 21 is connected in a sliding way in the through hole 35.

The handle 3 is provided with a weakening connection 34, and the weakening connection 34 can be manually torn to divide the handle 3 into two parts.

The end of the catheter seat 23 far away from the catheter 21 is provided with a conical hole 25, one end of the pushing seat 5 is provided with an outer conical column 51 matched with the conical hole 25, the outer surface of the conical hole 25 at one end of the catheter seat 23 is provided with a thread section 24, and the thread section 24 is used for being matched with an infusion end.

The two ends of the handle 3 are provided with stop ribs 33, the inside of the shell 4 is provided with sliding grooves 47 matched with the stop ribs, and the handle is prevented from rotating in the shell 4 by the stop ribs 33.

When the catheter assembly 2 is in the first position, the part of the cutting edge of the needle tube 1 extending out of the handle 3 is 20mm-50mm long, and the length can be 20mm, 30mm, 40mm or 50mm.

When the catheter assembly 2 is in the first position, the length of the cutting edge of the needle tube 1, which extends out of the catheter 21, is 0.25mm-0.65mm, and the length can be 0.25mm, 0.35mm, 0.45mm, 0.55mm or 0.65mm.

Working process or working principle:

as shown in fig. 13 to 20, during assembly, the needle tube is fixed in the housing, the catheter assembly is inserted into the pushing seat, the needle tube sequentially passes through the pushing seat and the catheter assembly, the pushing seat is screwed into the clamping groove of the housing, and the handle is sleeved into the housing.

When the catheter is used, after the peripheral vein position is confirmed, the needle tip punctures a blood vessel, then the pushing seat is rotated into the sliding groove, the pushing seat is pushed forward, and when the catheter assembly moves to the handle position along the sliding groove, the handle clamping hook is matched with the clamping plate of the catheter seat. Pressing on the push point on the clamp housing holding arm opens the clamp arm, pushing the handle outward, and the handle moves with the catheter assembly and the push seat, separate from the housing. And then the handle is broken off, and the handle is separated along the weak joint, so that the separation of the handle from the pushing seat and the catheter assembly is realized, and finally the pushing seat is taken down, the catheter assembly is reserved, and the tube placement is completed.

The description of the directions and the relative positional relationships of the structures, such as the description of the front, back, left, right, up and down, in the present utility model does not limit the present utility model, but is merely for convenience of description.

Claims

1. The utility model provides a peripheral intravenous catheter subassembly that well keep somewhere for a long time, needle tubing (1) one end is equipped with the blade, a serial communication port, including handle (3), casing (4), catheter assembly (2), needle tubing (1) and push away seat (5), handle (3) set up in advance in casing (4) one end, casing (4) inside is fixed to be set up needle tubing (1), needle tubing (1) pass through inside through-hole (35) that set up of handle (3), set up catheter assembly (2) movably between casing (4) and needle tubing (1), catheter assembly (2) keep away from one end of handle (3) and are equipped with push away seat (5), catheter assembly (2) can slide along needle tubing (1) in casing (4);

the catheter assembly (2) comprises a catheter (21) and a catheter seat (23), the catheter (21) and the catheter seat (23) are sleeved outside the needle tube (1), one end of the catheter (21) is fixedly provided with the catheter seat (23), and when the catheter assembly (2) is positioned at the first position, the cutting edge of one end of the needle tube (1) extends out of the most distal end of the catheter (21); when the catheter assembly (2) is in the second position, an anchoring connection is formed between the catheter seat (23) and the handle (3); when the handle (3) is separated from the shell (4), the handle (3) drives the catheter assembly (2) to slide along the needle tube (1) until the catheter assembly (2) is thoroughly separated from the needle tube (1).

2. The peripheral venous catheter assembly for medium and long-term indwelling according to claim 1, wherein a clamping plate (22) is arranged on the catheter seat (23), a clamping hook (31) matched with the clamping plate (22) is arranged at one end of the handle (3), and anchoring connection between the catheter seat (23) and the handle (3) can be achieved through the clamping plate (22) and the clamping hook (31).

3. The peripheral venous catheter assembly for long-term retention according to claim 2, wherein the two sides of one end of the housing (4) are provided with clamping arms (401), and two sides of the handle (3) are provided with clamping tables (32) which are matched with one end of the clamping arms (401).

4. A peripheral venous catheter assembly for long-term indwelling according to claim 3, in which the holding arm (401) comprises a mating end (42), a supporting end (43) and a pressing end (44), a gap is left between the mating end (42) and the pressing end (44) and the housing (4), two end faces of the supporting end (43) are connected with the housing (4), and the mating end (42) is matched with the clamping table (32); the handle (3) is separated from the housing (4) by pressing the pressing end (44), supporting the supporting end (43), and disengaging the engaging end (42) from the chuck (32).

5. The long-term indwelling peripheral intravenous catheter assembly as set forth in any one of claims 1 to 4, wherein the catheter (21) has a diameter adapted to the diameter of the through hole (35), and the catheter (21) is slidably connected within the through hole (35).

6. The peripheral venous catheter assembly for long-term indwelling according to claim 5, wherein a weak link (34) is provided on the handle (3), and the weak link (34) can be manually torn to divide the handle (3) into two parts.

7. The peripheral venous catheter assembly for long-term indwelling according to claim 6, wherein one end of the catheter seat (23) far away from the catheter (21) is provided with a conical hole (25), and one end of the pushing seat (5) is provided with an outer conical column (51) matched with the conical hole (25).

8. The peripheral venous catheter assembly for long-term retention according to claim 6, wherein the two ends of the handle (3) are provided with stop ribs (33), and the inside of the shell (4) is provided with sliding grooves (47) matched with the stop ribs.

9. The long term indwelling peripheral intravenous catheter assembly according to claim 7 or 8, in which the portion of the needle cannula (1) cutting edge extending beyond the handle (3) is 20mm to 50mm in length when the catheter assembly (2) is in the first position.

10. The long term indwelling peripheral intravenous catheter assembly according to claim 9, in which the length of the needle cannula (1) edge extension catheter (21) is from 0.25mm to 0.65mm when the catheter assembly (2) is in the first position.