Soft needle for hemodialysis

Abstract

The utility model discloses a soft needle for hemodialysis, relates to hemodialysis technical field, including soft needle mechanism, plugging mechanism and reinforcing mechanism, the plugging mechanism of this device presses and plugs the catheter, but this mechanism realizes pressing by adjusting the distance between the pressure plate and the rectangular groove inner wall, and the pressing bottom sealing has little damage to the catheter, and the reinforcing mechanism is convenient to use. The possibility that the catheter is damaged in the plugging process is reduced, re-puncturing is avoided, pain of a patient is reduced, the reinforcing mechanism of the device is clamped into the corresponding grooves in the needle tube through the multiple protruding points installed on the soft needle base, reinforcing between the soft needle base and the needle tube is achieved, and the situation that the needle tube communicated with the hard needle falls off from the soft needle base in the puncturing process is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to hemodialysis technical field, concretely is a soft needle for hemodialysis. BACKGROUND

[0002] The soft needle for hemodialysis is also called indwelling needle, and the core component part includes a soft sleeve that can be left in a blood vessel and a stainless steel puncture guide needle core. When using, the catheter and the needle core are punctured into the blood vessel together, and when the catheter enters the blood vessel completely, the needle core is withdrawn, and only the soft catheter is left in the blood vessel to perform infusion treatment.

[0003] For example, the patent network discloses a soft needle for hemodialysis (publication number: CN221384592U), the device uses the narrow slot of the sealing clamp to extrude the catheter to clamp and block the catheter, but in the actual operation process, since the catheter enters the narrow slot and rubs the inner wall, the sharp edge of the narrow slot may scratch the catheter due to machining, and the whole device is scrapped, so it is necessary to puncture the patient again, which increases the pain of the patient, therefore, the technical personnel in the art propose a soft needle for hemodialysis. UTILITY MODEL CONTENT

[0004] In view of the defects of the prior art, the utility model provides a soft needle for hemodialysis, which solves the problems in the above background.

[0005] To achieve the above object, the utility model realizes the following technical scheme: a soft needle for hemodialysis, comprising:

[0006] A soft needle mechanism is used for puncturing into a patient's blood vessel for hemodialysis.

[0007] A blocking mechanism is used for blocking the pipeline in the soft needle mechanism.

[0008] The blocking mechanism comprises a mounting seat, a first rectangular groove is formed in the side surface of the mounting seat, a threaded hole that is in communication with the first rectangular groove is formed in the lower surface of the mounting seat, a screw rod that is matched with the threaded hole is arranged in the threaded hole, the end of the screw rod that extends into the first rectangular groove is rotatably installed with a pressing plate that is matched with the first rectangular groove, and a knob is installed at the other end of the screw rod.

[0009] A reinforcing mechanism is used for reinforcing the fixation between the internal components of the soft needle mechanism.

[0010] As a further technical scheme of the utility model, the soft needle mechanism comprises a soft needle seat, a soft needle is installed at one end of the soft needle seat, a piston is arranged in the soft needle seat, a needle tube is arranged on one side of the piston in the soft needle seat, and a hard needle that extends into the soft needle through the piston is installed at the end of the needle tube.

[0011] As a further technical scheme of the utility model, the side surface of the soft needle seat is provided with a flow guide branch pipe, the end of the flow guide branch pipe is provided with a guide pipe penetrating through the first rectangular groove and located at the side of the pressing plate, and the side surface of the soft needle seat is provided with a flexible wing plate at the side of the flow guide branch pipe.

[0012] As a further technical scheme of the utility model, the reinforcing mechanism comprises a groove that is rectangularly arranged on the inner side surface of the needle tube in the soft needle seat.

[0013] As a further technical scheme of the utility model, the side surface of the soft needle seat is provided with a second rectangular groove at the side of each groove, the inner wall of each second rectangular groove is provided with an elastic sheet, and the side surface of each elastic sheet is provided with a protruding point extending into the corresponding groove. Advantages

[0014] The utility model provides a soft needle for hemodialysis, which has the following advantages compared with the prior art:

[0015] 1. A soft needle for hemodialysis, the plugging mechanism of the device presses and blocks the guide pipe, but the mechanism realizes pressing by adjusting the distance between the pressing plate and the inner wall of the rectangular groove, the pressing and blocking cause little damage to the guide pipe, reduce the possibility of damage to the guide pipe during the plugging process, avoid re-puncture, and reduce the pain of the patient.

[0016] 2. A soft needle for hemodialysis, the reinforcing mechanism of the device uses a plurality of protruding points installed on the soft needle seat to be clamped into the corresponding grooves on the needle tube, thereby realizing the reinforcement between the soft needle seat and the needle tube, and avoiding the situation that the needle tube connected with the hard needle falls off from the soft needle seat during puncture. DRAWINGS

[0017] Figure 1 It is a structural schematic view of a soft needle for hemodialysis.

[0018] Figure 2 It is a sectional view of a soft needle for hemodialysis.

[0019] Figure 3 It is Figure 2 It is an enlarged view of part A.

[0020] Figure 4 It is Figure 2 It is an enlarged view of part B.

[0021] Figure 5 It is a structural schematic view of a soft needle for hemodialysis in a disassembled state.

[0022] In the figure: 1, soft needle seat; 2, soft needle; 3, piston; 4, needle tube; 5, hard needle; 6, flow guide branch pipe; 7, catheter; 8, mounting seat; 9, rectangular groove; 10, screw rod; 11, pressing plate; 12, knob; 13, groove; 14, rectangular groove; 15, elastic sheet; 16, protruding point; 17, flexible wing piece. DETAILED DESCRIPTION

[0023] The present disclosure will be described in further detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related content, and not to limit the present disclosure. In addition, it should be noted that, for the sake of description, only parts related to the present disclosure are shown in the drawings.

[0024] Figure 1 It is a schematic view of the structure of a soft needle for hemodialysis;

[0025] Figure 2 It is a sectional view of a soft needle for hemodialysis;

[0026] Figure 3 It is Figure 2 an enlarged view of part A;

[0027] Figure 4 It is Figure 2 an enlarged view of part B;

[0028] Figure 5 It is a schematic view of the structure of a soft needle for hemodialysis in a disassembled state;

[0029] As Figures 1-5 shown, a soft needle for hemodialysis of the present disclosure can include a soft needle mechanism, a plugging mechanism, and a reinforcing mechanism;

[0030] As Figures 1-5 shown, the soft needle mechanism includes a soft needle seat 1, a soft needle 2, a piston 3, a needle tube 4, a hard needle 5, a flow guide branch pipe 6, a catheter 7, and a flexible wing piece 17;

[0031] The soft needle 2 is installed at the end of the soft needle seat 1, the piston 3 is arranged inside the soft needle seat 1, the needle tube 4 is arranged inside the soft needle seat 1 and on one side of the piston 3, the hard needle 5 is installed at the end of the needle tube 4 and extends through the piston 3 into the soft needle 2, the flow guide branch pipe 6 is installed on the side of the soft needle seat 1, the catheter 7 is installed at the end of the flow guide branch pipe 6, and the flexible wing piece 17 is installed on the side of the soft needle seat 1 and on one side of the flow guide branch pipe 6;

[0032] In use, the medical staff pinch the flexible wing 17 to pick up the device, and then the soft needle 2 is pierced into the blood vessel together with the hard needle 5. When the soft needle 2 is fully inserted into the blood vessel, the occlusion catheter 7 is blocked to block the blood passage. Then the soft needle seat 1 is fixed on the patient's arm by the adhesive tape, and the cotton is fixed at the needle insertion site by the adhesive tape. Finally, the needle tube 4 is pulled out to make the hard needle 5 withdraw from the soft needle 2. After ensuring that the catheter 7 is connected correctly, the occlusion of the catheter 7 is released to realize the connection of the blood passage, and dialysis is realized.

[0033] As shown in Figures 1-5 , the occlusion mechanism includes a mounting seat 8, a first rectangular groove 9, a screw rod 10, a pressing plate 11, and a knob 12.

[0034] The first rectangular groove 9 is opened in the side surface of the mounting seat 8, and the catheter 7 passes through the first rectangular groove 9. The side surface of the mounting seat 8 is provided with a threaded hole in communication with the first rectangular groove 9. The screw rod 10 is provided with a screw rod 10 matched with the threaded hole. The pressing plate 11 is rotationally installed at the end of the screw rod 10 located in the first rectangular groove 9. The pressing plate 11 is matched with the first rectangular groove 9. The knob 12 is installed at the other end of the screw rod 10.

[0035] When the catheter 7 needs to be occluded, the knob 12 is rotated to drive the screw rod 10 to rotate. The screw rod 10 drives the pressing plate 11 to move towards the catheter 7 through threaded transmission. At the same time, the pressing plate 11 only moves without rotating due to the limitation of the first rectangular groove 9. The moving pressing plate 11 is used to extrude the catheter 7 in cooperation with the inner wall of the first rectangular groove 9. Until the catheter 7 is extruded and occluded, the occlusion is released by reversing the knob 12 to move the pressing plate 11 away from the catheter 7 through the above operation. Since this mechanism only presses the catheter 7, the friction between the catheter 7 and the pressing plate 11 is reduced, the possibility of damage to the catheter 7 during the occlusion process is reduced, re-piercing is avoided, and the pain of the patient is reduced.

[0036] As shown in Figures 1-5 , it includes a groove 13, a second rectangular groove 14, a spring 15, and a protruding point 16.

[0037] Four grooves 13 are installed in the side surface of the needle tube 4 inside the soft needle seat 1. Each second rectangular groove 14 is opened in the side surface of the soft needle seat 1 and is located on one side of the corresponding groove 13. Each spring 15 is installed on the inner wall of the corresponding second rectangular groove 14. Each protruding point 16 is installed on the side surface of the corresponding spring 15 and is clamped into the corresponding protruding point 16.

[0038] The reinforcing mechanism of the device uses a plurality of protrusions 16 mounted on the soft needle seat 1 to be clamped into the corresponding grooves 13 on the needle tube 4, to achieve reinforcement between the soft needle seat 1 and the needle tube 4, avoid the situation that the needle tube 4 connected with the hard needle 5 falls off from the soft needle seat 1 during puncture, and is simple to disassemble, and medical staff only need to increase the pulling force on the needle tube 4 to make all the second rectangular grooves 14 deform to make all the protrusions 16 move out of the grooves 13, so that the reinforcement can be released, and then the soft needle seat 1 and the needle tube 4 can be separated, which is simple to operate and convenient for medical staff to operate;

[0039] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments / ways or examples. In addition, different embodiments / ways or examples described in the present specification and the features of different embodiments / ways or examples can be combined and combined by those skilled in the art without contradiction.

[0040] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0041] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. Based on the above disclosure, other changes or modifications can also be made by those skilled in the art, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A soft needle for hemodialysis, characterized by, Include: Soft needle mechanism for piercing into the blood vessels of patients for hemodialysis; Blocking mechanism for blocking the pipeline in the soft needle mechanism; The blocking mechanism includes a mounting seat (8), a first rectangular groove (9) is opened on the side surface of the mounting seat (8), a threaded hole is opened on the lower surface of the mounting seat (8) and communicates with the first rectangular groove (9), a screw rod (10) matched with the threaded hole is arranged in the threaded hole, the end of the screw rod (10) extending into the first rectangular groove (9) is rotatably installed with a pressing plate (11) matched with the first rectangular groove (9), and a knob (12) is installed on the other end of the screw rod (10). Reinforcing mechanism for reinforcing the fixation between the internal parts of the soft needle mechanism.

2. The soft needle for hemodialysis according to claim 1, wherein The soft needle mechanism includes a soft needle seat (1), a soft needle (2) is installed at one end of the soft needle seat (1), a piston (3) is arranged in the soft needle seat (1), a needle tube (4) is arranged on one side of the piston (3) in the soft needle seat (1), and a hard needle (5) extending through the piston (3) and into the soft needle (2) is installed at the end of the needle tube (4).

3. The soft needle for hemodialysis according to claim 2, wherein A flow guide branch pipe (6) is installed on the side surface of the soft needle seat (1), a catheter (7) penetrating through the first rectangular groove (9) and located on one side of the pressing plate (11) is installed at the end of the flow guide branch pipe (6), and a flexible wing (17) is installed on one side of the flow guide branch pipe (6) on the side surface of the soft needle seat (1).

4. The soft needle for hemodialysis according to claim 3, wherein The reinforcing mechanism includes a rectangular recess (13) opened on the inner side surface of the needle tube (4) in the soft needle seat (1).

5. The soft needle for hemodialysis according to claim 4, wherein A second rectangular groove (14) is opened on one side of each recess (13) on the side surface of the soft needle seat (1), a spring sheet (15) is installed on the inner wall of each second rectangular groove (14), and a protruding point (16) extending into the corresponding recess (13) is installed on the side surface of each spring sheet (15).

Images