Peripherally Inserted Central Catheter (PICC) Assembly for Long-Term Indwelling

Abstract

The present invention relates to a mid- and long-term indwelling peripheral venous catheter assembly, belonging to the technical field of medical devices for mid- and long-term intravenous infusion. One end of the needle tube is provided with a cutting edge, and it includes a handle, a housing, a catheter assembly, a needle tube, and a push seat. The handle is pre-set at one end of the housing. The needle tube is fixedly arranged inside the housing, and the needle tube passes through a through hole provided inside the handle. A catheter assembly is movably arranged between the housing and the needle tube. One end of the catheter assembly away from the handle is provided with a push seat, and the catheter assembly slides along the needle tube inside the housing. The present invention provides a mid- and long-term indwelling peripheral venous catheter assembly with a catheter length of up to 60 mm - 120 mm, which is simple and convenient to operate, and can realize a peripheral venous catheter assembly for intravascular cannulation at a deeper position, meeting the needs of mid- and long-term vascular access.

Description

Technical Field

[0001] The present invention relates to a peripherally inserted central venous catheter assembly for medium- and long-term indwelling, belonging to the technical field of medical devices for medium- and long-term intravenous infusion. Background Art

[0002] An indwelling needle catheter is a device in which a catheter is sleeved on a puncture needle and is sent into a blood vessel together with the puncture needle through tissues such as the skin and fat layer. After entering the blood vessel, the puncture needle is withdrawn, and the front end of the catheter remains in the blood vessel.

[0003] The existing catheters in the field, i.e., PIVCs, are relatively short in length, usually 15 mm - 50 mm, and are generally placed in peripheral veins at movable positions such as the wrist and forearm. The risk of catheter dislocation at these positions is relatively high. At the same time, the activities of the wrist and forearm are likely to cause the catheter to bend and blood to return, resulting in blockage and catheter removal. In addition, also due to the short length, the outlet position of the catheter can only be located in the small and superficial peripheral veins. After the drug enters the blood vessel from the catheter outlet, due to the small blood flow at these positions, the drug retardation causes continuous stimulation to the blood vessel, which is likely to cause an inflammatory reaction.

[0004] The existing PIVCs in the prior art have a relatively high incidence of complications (such as phlebitis, catheter blockage, dislocation, etc.), resulting in an average indwelling time of no more than 96 hours. Often, after the occurrence of complications, the catheter needs to be removed and a new PIVC needs to be inserted, which cannot meet the requirements of medium- and long-term (7 - 30 days) vascular access. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art and provide a peripherally inserted central venous catheter assembly for medium- and long-term indwelling, with a catheter length of up to 60 mm - 120 mm, which is simple and convenient to operate, and can realize a peripherally inserted central venous catheter assembly for deep vascular intubation, meeting the requirements of medium- and long-term vascular access.

[0006] In the peripherally inserted central venous catheter assembly for medium- and long-term indwelling of the present invention, one end of the needle tube is provided with a cutting edge, and it includes a handle, a housing, a catheter assembly, a needle tube, and a push seat. The handle is pre-set at one end of the housing. The needle tube is fixedly arranged inside the housing. The needle tube passes through a through hole provided inside the handle. A catheter assembly is movably arranged between the housing and the needle tube. One end of the catheter assembly away from the handle is provided with a push seat, and the catheter assembly slides along the needle tube inside the housing;

[0007] The catheter assembly includes 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. When the catheter assembly is in the first position, the cutting edge at one end of the needle tube extends out of the farthest end of the catheter; when the catheter assembly is in the second position, an anchoring connection is formed between the catheter seat and the handle; when the handle is separated from the housing, the handle drives the catheter assembly to slide along the needle tube until the catheter assembly is completely separated from the needle tube.

[0008] Working process or working principle:

[0009] During assembly, first fix the needle tube in the shell, then plug the catheter assembly into the push seat, then pass the needle tube through the push seat and the catheter assembly in sequence, then screw the push seat into the slot of the shell, and finally put the handle into the shell.

[0010] When in use, after confirming the position of the peripheral vein, the needle tip of the needle tube punctures the blood vessel, and then pushes the push seat. When the catheter assembly moves along the slide groove to the handle position, the handle and the catheter seat cooperate. Push the handle outward, and the handle moves together with the catheter assembly and the push seat and separates from the shell. Then bend the handle to separate the handle, thereby separating the handle from the push seat and the catheter assembly. Finally, remove the push seat, retain the catheter assembly, and the catheterization is completed.

[0011] Furthermore, a clamping plate is provided on the catheter seat, and a clamping hook matched with the clamping plate is provided at one end of the handle, and the clamping plate and the clamping hook realize an anchoring connection between the catheter seat and the handle.

[0012] Furthermore, clamping arms are provided on both side surfaces of one end of the shell, and clamping tables matched with one end of the clamping arms are provided on both sides of the handle.

[0013] Furthermore, the clamping arm includes a mating end, a supporting end and a pressing end. A gap is left between the mating end, the pressing end and the shell. The two end surfaces of the supporting end are connected to the shell. The mating end is mated with the card table. By pressing the pressing end, the supporting end is supported, the mating end is disengaged from the card table, and the handle is separated from the shell.

[0014] Furthermore, the diameter of the conduit matches the diameter of the through hole, and the conduit is slidably connected in the through hole.

[0015] Furthermore, a weak connection is provided on the handle, and the weak connection can be torn apart manually to separate the handle into two parts.

[0016] Furthermore, a conical hole is provided at one end of the catheter seat away from the catheter, and an outer conical column matched with the conical hole is provided at one end of the pushing seat.

[0017] Furthermore, stop ribs are provided at both ends of the handle, and a slide groove matched with the stop ribs is provided inside the shell.

[0018] Furthermore, when the catheter assembly is in the first position, the needle tube cutting edge extends out of the handle portion by a length of 20 mm to 50 mm.

[0019] Furthermore, when the catheter assembly is in the first position, the length of the needle tube cutting edge extending out of the catheter is 0.25 mm-0.65 mm.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention realizes the segmented insertion of a long catheter into a blood vessel by designing a handle that can reduce the puncture force arm, a housing and a handle that can be selectively separated, a handle and a catheter hub that can be selectively anchored to each other, and a catheter assembly that can slide along the needle tube.

[0022] 2. By providing a catheter assembly and a handle, the length of the catheter of the present invention can reach 60 mm - 120 mm, and the operation is simple and convenient. It can realize a peripheral venous catheter assembly for deep blood vessel intubation, meeting the needs of medium- and long-term vascular access. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the first position of Embodiment 1 of the present invention;

[0024] Figure 2 is a cross-sectional view of the present invention;

[0025] Figure 3 is Figure 2 a partial enlarged view of A in

[0026] Figure 4 is a schematic structural diagram of the second position of Embodiment 1;

[0027] Figure 5 is a schematic structural diagram of the present invention after being pushed out;

[0028] Figure 6 is a schematic structural diagram of the handle of the present invention;

[0029] Figure 7 is Figure 6 a partial enlarged view of B in

[0030] Figure 8 is a schematic structural diagram of the push seat of the present invention;

[0031] Figure 9 is a schematic structural diagram of the housing of the present invention;

[0032] Figure 10 is Figure 9 a partial enlarged view of C in

[0033] Figure 11 is one of the schematic structural diagrams of the catheter assembly of the present invention;

[0034] Figure 12 is another schematic structural diagram of the catheter assembly of the present invention;

[0035] Figure 13 is a working schematic diagram of Embodiment 1 of the present invention Figure One ;

[0036] Figure 14 is a working schematic diagram of Embodiment 1 of the present invention Figure Two ;

[0037] Figure 15 is the working schematic diagram of Embodiment 1 of the present invention Figure Three ;

[0038] Figure 16 is the working schematic diagram of Embodiment 1 of the present invention Figure Four ;

[0039] Figure 17 is the working schematic diagram of Embodiment 1 of the present invention Figure Five ;

[0040] Figure 18 is the working schematic diagram of Embodiment 1 of the present invention Figure Six ;

[0041] Figure 19 is the working schematic diagram of Embodiment 1 of the present invention Figure Seven ;

[0042] Figure 20 is the working schematic diagram of Embodiment 1 of the present invention Figure Eight ;

[0043] In the figure: 1. Syringe; 2. Catheter assembly; 3. Handle; 4. Housing; 5. Pushing seat;

[0044] 11. Blood inlet hole; 21. Catheter; 22. Clamping plate; 23. Catheter seat; 24. Threaded section; 25. Tapered hole; 31. Hook; 32. Clamping platform; 33. Stop rib; 34. Weak connection; 35. Through hole; 41. Anti-slip pattern; 42. Fitting end; 43. Support end; 44. Pressing end; 45. Notch; 46. Card slot; 47. Slide groove; 51. Tapered column; 401. Clamping arm. Detailed implementation manners

[0045] Embodiment 1

[0046] As Figures 1 to 12As shown in the figure, for the mid- to long-term indwelling peripheral venous catheter assembly of the present invention, one end of the needle tube 1 is provided with a sharp cutting edge, and it includes a handle 3, a housing 4, a catheter assembly 2, a needle tube 1, and a pushing seat 5. The handle 3 is pre-set at one end of the housing 4. The needle tube 1 is fixedly arranged inside the housing 4. The needle tube 1 passes through a through hole 35 arranged inside the handle 3. The catheter assembly 2 is movably arranged between the housing 4 and the needle tube 1. One end of the catheter assembly 2 away from the handle 3 is provided with a pushing seat 5. The catheter assembly 2 slides along the needle tube 1 inside the housing 4. An anti-slip pattern 41 is provided on the outer surface of the housing 4 at the connection between the housing 4 and the handle 3. A notch 45 is opened on the outer surface of the housing 4. The pushing seat 5 slides in the notch. The notch 45 is arranged along the axis direction of the housing 4. One end of the notch 45 away from the handle 3 extends towards the outer circumferential surface of the housing to be provided with a card slot 46. The card slot 46 positions the pushing seat 5 to prevent the pushing seat 5 from moving inside the housing. When needed, rotate the pushing seat 5 to the notch 45 to be available for use; there is a blood inlet hole 11 at the front end of the needle tube 1. The blood inlet hole 11 is used for blood flow, and blood can easily flow into the catheter 21.

[0047] The catheter assembly 2 includes 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. When the catheter assembly 2 is in the first position (as Figure 1 shown), the cutting edge at one end of the needle tube 1 extends out of the outermost end of the catheter 21; when the catheter assembly 2 is in the second position (as Figure 4 shown), an anchoring connection is formed between the catheter seat 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 tube 1 until the catheter assembly 2 is completely separated from the needle tube 1.

[0048] A clamping plate 22 is provided on the catheter seat 23, and a hook 31 adapted to the clamping plate 22 is provided at one end of the handle 3. The clamping plate 22 and the hook 31 realize the anchoring connection between the catheter seat 23 and the handle 3.

[0049] Clamping arms 401 are provided on both sides of one end of the housing 4, and clamping platforms 32 adapted to one end of the clamping arms 401 are arranged on both sides of the handle 3.

[0050] The clamping arm 401 includes a mating end 42, a support end 43, and a pressing end 44. There are gaps between the mating end 42 and the pressing end 44 and the housing 4. Both end faces of the support end 43 are connected to the housing 4. The mating end 42 cooperates with the clamping platform 32. By pressing the pressing end 44, the support end 43 supports, and the mating end 42 is disengaged from the cooperation with the clamping platform 32, and the handle 3 is separated from the housing 4.

[0051] The diameter of the catheter 21 is adapted to the diameter of the through hole 35, and the catheter 21 is slidably connected inside the through hole 35.

[0052] A weak connection 34 is provided on the handle 3, and the weak connection 34 can be manually torn to divide the handle 3 into two parts.

[0053] A conical hole 25 is provided at one end of the catheter seat 23 away from the catheter 21, an outer conical column 51 matching the conical hole 25 is provided at one end of the push seat 5, and a threaded section 24 is provided on the outer surface of the conical hole 25 at one end of the catheter seat 23, and the threaded section 24 is used to cooperate with the infusion end.

[0054] Stop ribs 33 are provided at both ends of the handle 3 , and a slide groove 47 adapted to the stop ribs is provided inside the housing 4 , so that the stop ribs 33 are provided to prevent the handle from rotating inside the housing 4 .

[0055] When the catheter assembly 2 is in the first position, the length of the portion of the needle tube 1 extending from the handle 3 is 20 mm to 50 mm, and the length can be 20 mm, 30 mm, 40 mm or 50 mm.

[0056] When the catheter assembly 2 is in the first position, the length of the cutting edge of the needle tube 1 extending out of the catheter 21 is 0.25 mm-0.65 mm, and the length can be selected from 0.25 mm, 0.35 mm, 0.45 mm, 0.55 mm or 0.65 mm.

[0057] Working process or working principle:

[0058] like Figures 13 to 20 As shown, during assembly, first fix the needle tube in the shell, then plug the catheter assembly into the push seat, then pass the needle tube through the push seat and the catheter assembly in sequence, then screw the push seat into the slot of the shell, and finally put the handle into the shell.

[0059] When in use, after confirming the position of the peripheral vein, puncture the blood vessel with the needle tip, then turn the push seat into the slide slot, push the push seat forward, and when the catheter assembly moves along the slide slot to the handle position, the handle hook cooperates with the clamping plate of the catheter seat. Press the point on the clamp housing holding arm to open the clamp arm, push the handle outward, and the handle moves together with the catheter assembly and the push seat and separates from the housing. Then bend the handle, separate the handle along the weak connection, thereby separating the handle from the push seat and the catheter assembly, and finally remove the push seat, retain the catheter assembly, and the catheter placement is completed.

[0060] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A mid- to long-term indwelling peripheral venous catheter assembly, one end of the needle tube (1) is provided with a cutting edge, and it is characterized in that, It includes a handle (3), a housing (4), a catheter assembly (2), a needle tube (1), and a pushing seat (5). The handle (3) is preset at one end of the housing (4). The needle tube (1) is fixedly arranged inside the housing (4). The needle tube (1) passes through a through hole (35) arranged inside the handle (3). A catheter assembly (2) is movably arranged between the housing (4) and the needle tube (1). A pushing seat (5) is provided at one end of the catheter assembly (2) away from the handle (3). The catheter assembly (2) can slide along the needle tube (1) inside the housing (4); The catheter assembly (2) includes 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). When the catheter assembly (2) is in the first position, the cutting edge at one end of the needle tube (1) extends out of the farthest 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 housing (4), the handle (3) drives the catheter assembly (2) to slide along the needle tube (1) until the catheter assembly (2) is completely separated from the needle tube (1); A weak connection (34) is provided on the handle (3), and the weak connection (34) can be manually torn to divide the handle (3) into two parts; A clamping plate (22) is provided on the catheter seat (23), and a hook (31) adapted to the clamping plate (22) is provided at one end of the handle (3). The clamping plate (22) and the hook (31) can achieve the anchoring connection between the catheter seat (23) and the handle (3); Clamping arms (401) are provided on both sides of one end of the housing (4), and clamping platforms (32) adapted to one end of the clamping arms (401) are provided on both sides of the handle (3); The clamping arm (401) includes a mating end (42), a supporting end (43), and a pressing end (44). There are gaps between the mating end (42) and the pressing end (44) and the housing (4). Both end faces of the supporting end (43) are connected to the housing (4). The mating end (42) cooperates with the clamping platform (32); by pressing the pressing end (44), supported by the supporting end (43), the mating end (42) is disengaged from the clamping platform (32), and the handle (3) is separated from the housing (4).

2. The mid- to long-term indwelling peripheral venous catheter assembly according to claim 1, characterized in that, The diameter of the catheter (21) is adapted to the diameter of the through hole (35), and the catheter (21) is slidably connected inside the through hole (35).

3. The mid- to long-term indwelling peripheral venous catheter assembly according to claim 1, characterized in that, A conical hole (25) is provided at one end of the catheter seat (23) away from the catheter (21), and an external conical column (51) adapted to the conical hole (25) is provided at one end of the pushing seat (5).

4. The mid- to long-term indwelling peripheral venous catheter assembly according to claim 1, characterized in that, Stop ribs (33) are provided at both ends of the handle (3), and a sliding groove (47) adapted to the stop ribs is provided inside the housing (4).

5. The mid- to long-term indwelling peripheral venous catheter assembly according to claim 3 or 4, characterized in that, When the catheter assembly (2) is in the first position, the length of the part where the cutting edge of the needle tube (1) extends out of the handle (3) is 20 mm - 50 mm.

6. The mid- to long-term indwelling peripheral venous catheter assembly according to claim 5, characterized in that, When the catheter assembly (2) is in the first position, the length of the cutting edge of the needle tube (1) extending out of the catheter (21) is 0.25 mm - 0.65 mm.

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