CN215537309U

CN215537309U - Anti-reflux remaining needle

Info

Publication number: CN215537309U
Application number: CN202121113351.5U
Authority: CN
Inventors: 于志伟; 关欣
Original assignee: Xuanwu Hospital
Current assignee: Xuanwu Hospital
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2022-01-18
Anticipated expiration: 2031-05-21

Abstract

The utility model relates to an anti-reflux remaining needle. The utility model provides a prevent remaining needle against current, the needle of keeping somewhere includes three way connection, three way connection is including the first joint of connecting the extension pipe, the needle of keeping somewhere is provided with the locking mechanical system that can prevent the blood backward flow in first joint, locking mechanical system is including the first locking unit and the second locking unit that can the mutual motion be close to each other or keep away from each other, when first locking unit and second locking unit support each other and lean on, the needle way that keeps somewhere seals. Therefore, the first joint of the remaining needle can be conveniently sealed, the sealing is stable, and the mistaken touch can be prevented.

Description

Anti-reflux remaining needle

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an anti-reflux remaining needle.

Background

The venous indwelling needle can avoid repeated puncture when in use, reduces the workload of nurses and the pain of patients, and is convenient for the first aid of critical patients. Keep somewhere the needle and need seal the pipe after the use, avoid patient's blood backward flow, also avoid external pollutant to get into patient's blood vessel through keeping somewhere the needle and cause patient's infection. In the use and maintenance process of the existing indwelling needle, the clip provided with only one slice-shaped strip-shaped clip groove or an oval pressing type clip body cannot be completely fixed at the position close to the needle base when in use, even if the clip is clamped at the position nearest to the needle base to the maximum extent, blood return can be generated when a patient exerts force slightly or does not exert force, and the blood return cannot be continuously used after the blood return is solidified in the indwelling needle infusion tube. Therefore, the maintenance of the sealed blood in the pipeline after the transfusion is finished is a crucial step for prolonging the service life of the indwelling needle.

The prior art improves a clip of an indwelling needle sealing tube to avoid blood backflow when the indwelling needle is not used, CN202314702U provides a medical indwelling needle with a belt part elastic positive pressure sealing tube clamp, the indwelling needle is sleeved with an elastic positive sealing tube clamp on a liquid tube connected with a needle head and a transfusion plug, an upper clamping plate and a lower clamping plate which can clamp and seal a transfusion tube are arranged in the sealing tube clamp, two ends of a single opening at the upper side are respectively provided with a blocking ridge and a clamping head, the small side of the blocking ridge is connected with an integrated clip opening pressing head, when the tube sealing is finished after the transfusion of the needle is used for a patient, medical personnel only need to technically carry out pulse type indwelling injection with 5ml of physiological saline, when 1ml of residual transfusion is injected, one hand continues injection, the other hand quickly clamps the elastic positive pressure sealing tube clamp to seal the transfusion tube, because the sealing tube clamp is in an elastic mode, the physiological saline in the transfusion tube can be quickly pushed into the blood vessel again in the extrusion process, the indwelling needle tube is in a positive pressure state, the phenomenon of tube blockage caused by blood return can be effectively avoided, and the operation is convenient and stable.

CN205832300U provides a positive pressure device for a press type indwelling needle. The casing comprises a casing body and a pressing block, wherein a groove with a U-shaped longitudinal section and capable of accommodating the extension pipe and the pressing block is formed in the casing body; the rotary shaft of the pressing block is in rotational fit with the concave holes symmetrically formed in the inner surfaces of the two side walls of the groove end, the lower surface of the pressing block is matched with the bottom surface of the groove, the end surfaces of the two side walls of the other end of the groove and the pressing end of the pressing block are provided with locking mechanisms matched with each other, the locking mechanism locks the delay tube and is in a closed state, and the locking mechanism opens the delay tube and is in an open state.

However, in the using process of the device, a pipeline still exists between the locking mechanism (the clip) and the needle seat, and the problem that blood flows backwards and stays in the pipeline for solidification still exists, so that the problem of blood backflow is difficult to avoid completely; and the device can increase the volume and the weight of the indwelling needle, so that the wearing burden of a patient is increased, and the probability of mistaken touch of the indwelling needle is increased.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor has studied a lot of documents and patents when making the present invention, but the space is not limited to the details and contents listed in the above, however, the present invention is by no means free of the features of the prior art, but the present invention has been provided with all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides an anti-reflux indwelling needle which comprises a three-way connector, wherein the three-way connector comprises a first connector used for connecting an extension pipe. The indwelling needle comprises a indwelling needle body, a first joint, a second joint and a locking mechanism, wherein the indwelling needle body is provided with a blood backflow prevention locking mechanism in the first joint, the locking mechanism comprises a first locking unit and a second locking unit which can move relatively and are separated or abutted against each other, and when the first locking unit and the second locking unit abut against each other, the indwelling needle channel is closed.

According to a preferred embodiment, the first locking unit is fixedly connected to the first connector by means of a fastening element.

According to a preferred embodiment, the second locking unit is connected in a sliding and sealing manner to the first joint by a sliding element in such a manner that it can be brought into abutment against or disengaged from the first locking unit on the basis of an external force.

According to a preferred embodiment, a first space is formed between the first locking unit and the second locking unit when the first locking unit and the second locking unit abut against each other.

According to a preferred embodiment, the first locking unit comprises a wide portion and a narrow portion of uniform diameter integrally formed or fixedly connected to each other, the narrow portion being connected at one end to the wide portion and at an end opposite to the wide portion to the middle of the fixing member.

According to a preferred embodiment, the second locking unit comprises a stopper in sliding sealing connection with the inner wall of the first joint, the slider is integrally formed with or fixedly connected to the stopper, and the stopper abuts against the wide portion of the first locking unit.

According to a preferred embodiment, in a case where the stopper of the second locking means abuts against the wide portion of the first locking means based on an external force, the first space is partitioned from the indwelling needle catheter; when the stopper is disengaged from the wide portion of the first locking unit based on an external force, the first space communicates with the indwelling needle catheter.

According to a preferred embodiment, the fixed part of the first locking unit comprises a first side and a second side, and the slide of the second locking unit is arranged on the first side of the fixed part.

According to a preferred embodiment, the fixing member is provided with a number of first holes in such a way that it is able to admit liquid medicine from the outside into the first space.

According to a preferred embodiment, the outer wall of the infusion tube is provided with a second hole in such a way as to allow the sliding of the slider within a certain distance of the first joint, the slider and the fixing element passing through the second hole respectively to constrain the second locking unit and the first locking unit in the infusion tube.

The beneficial technical effects of the utility model at least comprise one or more of the following items:

firstly, a locking mechanism is arranged in the first joint, and the closed or opened state of the locking mechanism on the first joint can be changed by pushing and pulling a second locking unit, so that the operation is simple and the size is small; the locking mechanism is arranged at the first joint, and the first joint is closed to prevent blood from flowing back to the extension tube;

secondly, the use is stable, the distance between the fixing piece and the sliding piece can be kept through the arrangement of the clamping ring, so that the abutting between the limiting piece and the wide part can be always kept, the first space and the catheter are kept in an isolated state, and when a patient touches the locking mechanism by mistake in the using process, the clamping ring can prevent the limiting piece and the wide part from being separated from abutting, so that the situation that the sealing property of the extension tube is lost, blood flows back to the extension tube, and the extension tube is blocked is caused; the compact construction further reduces the possibility of false touches.

Drawings

FIG. 1 is a schematic illustration of the present invention in a set position;

FIG. 2 is a schematic view of the locking mechanism of the present invention in a sealed condition;

FIG. 3 is a schematic structural view of the present invention in an open state;

fig. 4 is a top view structural view of the present invention.

List of reference numerals

100: first joint 110: the lock mechanism 111: first locking unit

112: second locking unit 200: extension tube 1111: fixing piece

1121: the sliding member 120: first space 1112: wide part

1113: narrow portion 1122: limiting piece 1111 a: first side

1111 b: second side 1121 a: third side 1121 b: fourth side

1111 c: first hole 130: second hole 140: folding film

150: first snap ring

Detailed Description

This is described in detail below with reference to fig. 1-4.

Indwelling needles are commonly used in intravenous injection and include steel needles, catheters, needle holders, white stoppers, transparent tees, extension tubes 200, single-handed clamps and positive pressure fittings or heparin caps. When the medical indwelling needle is used, the extension tube 200 is connected through the transparent tee joint for medicine injection, but during the indwelling process, if the fixation of a single-hand clip on the extension tube 200 is unstable, the blood of a patient easily flows back into the extension tube 200 and coagulates in the tube to cause the indwelling needle to be ineffective.

Example 1

The utility model provides an anti-reflux remaining needle, which comprises a three-way joint, wherein the three-way joint comprises a first joint 100 for connecting an extension pipe 200. A locking mechanism 110 is provided at the first connector 100 to enable sealing of the extension tube 200 from the first connector 100, thereby preventing blood from flowing back to the extension tube 200 from the source and coagulating inside the extension tube 200. The locking mechanism 110 is disposed inside the first joint 100, so that the probability of contact when a user uses the joint can be reduced, and the stability of the locking mechanism 110 can be improved. The locking mechanism 110 includes a first locking unit 111 and a second locking unit 112, and the first locking unit 111 and the second locking unit 112 can abut against or disengage from each other based on external control. When the first and

second locking units

111 and 112 abut against each other, the first connector 100 of the indwelling needle is closed.

According to a preferred embodiment, the first locking unit 111 is fixedly connected to the first connector 100 by a fixing member 1111. The fixing member 1111 may be, for example, a fixing plate or a fixing plate having a sheet-like shape inside and struts at edges thereof. Preferably, the material of the fixing plate or the fixing piece may be a material that has passed medical safety certification. For example, PVC material for syringe, etc. The first locking unit 111 comprises a wide portion 1112 or a narrow portion 1113. Preferably, the wide portion 1112 may be implemented as a cylinder of uniform size. The diameter of the wide portion 1112 is L1. Preferably, the narrow portion 1113 may be implemented in a cylindrical or prismatic shape of uniform size. The narrow portion 1113 and the wide portion 1112 are coaxially connected to each other, and the first end of the narrow portion 1113 is connected to the center of the wide portion 1112. The second end of the narrow portion 1113 opposite the first end is connected to the centre of the first side 1111a of the mount 1111 towards the needle tip. Preferably, the wide portion 1112 has a certain elasticity.

According to a preferred embodiment, the second locking unit 112 is slidably and sealingly connected to the first joint 100 via a slider 1121. The second locking unit 112 includes a stopper 1122 slidably and sealingly coupled to an inner wall of the first connector 100. Preferably, the stopper 1122 may be implemented as a hollow cylinder having a certain thickness. The inner diameter of the limiter 1122 is L2. Preferably, L1 is equal to L2, so that when the first and

second locking units

111 and 112 abut against each other based on an external force, an outer sidewall of the wide portion 1112 and an inner sidewall of the stopper 1122 can be in close contact with each other to close the interior of the first joint 100.

According to a preferred embodiment, a first space 120 is formed between the first locking unit 111 and the second locking unit 112 in case the first locking unit 111 and the second locking unit 112 abut against each other. When the first locking unit 111 and the second locking unit 112 are separated from each other by an external force, the first space 120 communicates with the catheter, so that the medical solution can pass through the extension tube 200, the first space 120, and then the catheter into the vein of the patient.

According to a preferred embodiment, a first side 1111a of the fixing member 1111 facing the needle tip and a fourth side of the sliding member 1121 facing the extension tube 200 are connected by a folding film 140. The folding film 140 is provided with a length equal to the maximum distance between the fourth side 1121b of the slider 1121 toward the extension tube 200 and the first side 1111a of the mount 1111 toward the needlepoint. Preferably, the folded film 140 may be, for example, a medical OEM film, a polyvinyl chloride film, or a polypropylene film. Through such a setting mode, make under the circumstances that makes the distance increase between mounting 1111 and the slider 1121 based on external force promotes, first space 120 can keep apart with external environment to guarantee the inside cleanliness nature in first space 120, guarantee the security that the patient used this remaining needle, avoid appearing the weeping in the in-process of using or cause external microorganism to get into the remaining needle and cause the circumstances that the remaining needle pollutes and then causes the patient to infect.

According to a preferred embodiment, the fixing member 1111 is provided with a plurality of first holes 1111c in such a manner as to allow a liquid medicine from the outside to enter the first space 120. The liquid medicine injected into the extension pipe 200 can enter the first space 120 through the first hole 1111 c.

According to a preferred embodiment, the outer wall of the infusion tube is provided with a second hole 130 in such a way as to allow the sliding of the slider 1121 within a certain distance of the first joint 100, the slider 1121 and the fixing member 1111 respectively passing through the second hole 130 to constrain the second locking unit 112 and the first locking unit 111 in the infusion tube.

According to a preferred embodiment, a first snap ring 150 is further included, and the first snap ring 150 is used for maintaining the distance between the fixing member 1111 and the sliding member 1121 after the first locking unit 111 and the second locking unit 112 abut against each other so that the pipe is closed. The first snap ring 150 can be clamped between the fixing member 1111 and the sliding member 1121 at the outside of the first connector 100. Preferably, the first snap ring 150 is notched to allow an operator to snap the snap ring into the exterior of the first connector 100. Preferably, the width of the first snap ring 150 is equal to the maximum distance between the second side 1111b of the sliding member 1121 toward the extension tube 200 and the first side 1111a of the fixing member 1111 toward the needle tip. Through the arrangement mode, under the condition that the sealing performance of the indwelling needle needs to be kept, the problem that the sealing performance of the locking mechanism 110 is lost and blood flows backwards for a patient due to mistaken touch in the process of carrying the indwelling needle by the patient can be avoided through the arrangement of the first clamping ring 150.

According to a preferred embodiment, the length of the edge of the fixing member 1111 passing through the first hole 1111c is L3, and the length of the edge of the sliding member 1121 passing through the first hole 1111c is L4. L4 is greater than L3. With such an arrangement, in a case where the second locking unit 112 needs to be slid, the user can quickly apply a force to the slider 1121, so that the first interface can be quickly closed.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the utility model. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the utility model is defined by the claims and their equivalents.

Claims

1. An anti-reflux indwelling needle comprising a three-way junction comprising a first junction (100) for connection to an extension tube (200), characterized in that,

a locking mechanism (110) for preventing blood backflow is arranged in the first connector (100) of the indwelling needle, the locking mechanism (110) comprises a first locking unit (111) and a second locking unit (112) which can move relatively to be separated from or abutted against each other,

when the first locking unit (111) and the second locking unit (112) abut against each other, the indwelling needle tract is closed.

2. The indwelling needle of claim 1, wherein the first locking unit (111) is fixedly connected to the first connector (100) by a fixing member (1111).

3. The indwelling needle according to claim 2, wherein the second locking unit (112) is in sliding sealing connection with the first connector (100) via a slider (1121) in such a way that it can abut against or disengage from the first locking unit (111) based on external force.

4. The indwelling needle according to claim 3, wherein a first space (120) is formed between the first locking unit (111) and the second locking unit (112) when the first locking unit (111) and the second locking unit (112) abut against each other.

5. The indwelling needle according to claim 4, wherein the first locking unit (111) comprises a wide portion (1112) and a narrow portion (1113) of uniform diameter integrally formed or fixedly connected to each other, the narrow portion (1113) being connected at one end to the wide portion (1112) and the narrow portion (1113) being connected at an end opposite to the wide portion (1112) to the middle of the fixing member (1111).

6. The indwelling needle according to claim 5, wherein the second locking unit (112) comprises a stopper (1122) in sliding sealing connection with the inner wall of the first connector (100), and the slider (1121) is integrally formed with or fixedly connected to the stopper (1122).

7. The indwelling needle according to claim 6, wherein the first space (120) is separated from the indwelling needle catheter in the case where the stopper (1122) of the second locking unit (112) abuts against the wide portion (1112) of the first locking unit (111) based on an external force; when the stopper (1122) is out of abutment with the wide portion (1112) of the first lock unit (111) based on an external force, the first space (120) communicates with the indwelling catheter.

8. The indwelling needle according to claim 7, wherein the fixing member (1111) of the first locking unit (111) comprises a first side (1111a) and a second side (1111b), and the slider (1121) of the second locking unit (112) is provided to the first side (1111a) of the fixing member (1111).

9. The indwelling needle according to claim 8, wherein the fixing member (1111) is provided with a plurality of first holes (1111c) in a manner allowing the medical fluid from the extension tube (200) to enter the first space (120).

10. The indwelling needle according to claim 9, wherein the outer wall of the infusion tube is provided with a second hole (130) in a manner that allows the sliding part (1121) to slide within a certain distance of the first connector (100), the sliding part (1121) and the fixing part (1111) passing through the second hole (130) to restrict the second locking unit (112) and the first locking unit (111) in the infusion tube, respectively.