CN211611100U - High pressure resistant remaining needle - Google Patents

Abstract

The application relates to the field of medical instruments for transfusion, in particular to a high-pressure resistant indwelling needle which comprises a catheter seat, an indwelling catheter, an isolating plug, a puncture needle and a needle seat; the first end of the catheter seat is connected with the indwelling catheter, the edge of the second end of the catheter seat is bent and extends inwards to form a limiting ring, and the edge of the limiting ring surrounds and forms a through hole; the puncture needle is connected with the needle seat, and the inner cavity of the indwelling catheter, the inner cavity of the catheter seat and the through hole together form a channel for the puncture needle to pass through; the isolation plug is arranged in the catheter seat, the outer wall of the isolation plug is in interference fit with the inner wall of the catheter seat, and the puncture needle penetrates through the isolation plug. This application extends the spacing ring that forms the isolating plug through the tip bending at the pipe seat, has low in production cost, advantage that the pressure-resistant ability is strong, accords with the long-term development's of company demand, solves the technical problem that prior art has the pressure-resistant ability poor effectively.

Description

High pressure resistant remaining needle

Technical Field

The application relates to the field of medical instruments for transfusion, in particular to a high-pressure resistant remaining needle.

Background

The indwelling needle is a medical apparatus for vein indwelling transfusion, is mainly applied to clinical venipuncture, takes medicine and provides nutrition for a patient, can avoid vascular injury caused by multiple punctures and relieve the pain of the patient, and is also favorable for reducing the operation intensity of nurses. In addition, the indwelling needle sometimes needs to be connected with a high-pressure syringe for contrast medium injection before CT examination. The highest pressure that the isolating plug in the catheter seat of the conventional Y-shaped indwelling needle can bear is only 100psi, and the requirement of clinical high-pressure injection (200-300 psi) is far less met. Although some existing indwelling needles can improve the pressure resistance of the isolating plug by means of high-strength glue bonding or by means of adding a pressure-resistant gasket at the outer end of the isolating plug, the pressure resistance improved by means of high-strength glue bonding is limited, so that the pressure resistance of the isolating plug is unreliable, and the indwelling needles bring danger to clinical medical staff when being injected at high pressure; the mode of adding the pressure-resistant gasket not only additionally adds parts, but also is relatively difficult to assemble the pressure-resistant gasket, thereby increasing the production cost of the remaining needle and being not beneficial to the long-term development of companies. Therefore, an indwelling needle with strong pressure resistance and low production cost is required.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application aims to provide a high pressure resistant indwelling needle, which effectively solves the technical problem of poor pressure resistance in the prior art, and has the advantages of low production cost and strong pressure resistance by bending and extending the end of the catheter hub to form the spacing ring of the isolating plug, thereby meeting the long-term development requirements of companies.

In order to achieve the purpose, the application provides the following technical scheme:

a high pressure resistant remaining needle comprises a catheter seat, a remaining catheter, an isolating plug, a puncture needle and a needle seat; the first end of the catheter seat is connected with the indwelling catheter, the edge of the second end of the catheter seat extends inwards to form a limiting ring, and the edge of the limiting ring surrounds and forms a through hole; the puncture needle is connected with the needle seat, and the inner cavity of the indwelling catheter, the inner cavity of the catheter seat and the through hole together form a channel for the puncture needle to pass through; the isolation plug is arranged in the catheter seat, the outer wall of the isolation plug is in interference fit with the inner wall of the catheter seat, and the puncture needle penetrates through the isolation plug.

Preferably, in the high pressure resistant indwelling needle described above, the diameter of the through hole is 1.5mm to 2.0 mm.

Preferably, in the high pressure resistant indwelling needle, an end of the isolating plug abuts against the stopper ring.

Preferably, in the high pressure resistant indwelling needle described above, the retainer ring is formed by hot pressing the second end edge of the catheter hub.

Preferably, in the high pressure resistant indwelling needle described above, the needle hub is fitted over the outer periphery of the catheter hub.

Preferably, in the high pressure resistant indwelling needle, the needle base is connected with a needle wing, and the needle wing is provided with a bulge.

Preferably, the high pressure resistant indwelling needle further comprises a needle tube sheath which is arranged around the outer circumference of the indwelling catheter.

Preferably, the high pressure resistant indwelling needle further comprises an infusion set, wherein the infusion set comprises an extension tube, a liquid stopping clamp and a three-way connecting tube;

the first end of the extension pipe is connected with the side wall of the catheter seat, the second end of the extension pipe is connected with the three-way connecting pipe, and the liquid stopping clamp is installed on the extension pipe;

the tee joint pipe comprises a joint, an end cap and a heparin cap, wherein the first end of the joint is connected with the extension pipe, the second end of the joint is connected with the heparin cap, and the end cap is connected with the side wall of the joint.

Preferably, in the high pressure resistant indwelling needle, the liquid stopping clip is provided with an anti-skid projection.

Preferably, in the high pressure resistant indwelling needle, the anti-slip protrusions are in a semi-spherical shape, an oval spherical shape or a saw-toothed shape.

The application provides a high pressure resistant indwelling needle, which comprises a catheter seat, an indwelling catheter, an isolating plug, a puncture needle and a needle seat; the first end of the catheter seat is connected with the indwelling catheter, the edge of the second end of the catheter seat extends inwards to form a limiting ring, and the edge of the limiting ring surrounds and forms a through hole; the puncture needle is connected with the needle seat, and the inner cavity of the indwelling catheter, the inner cavity of the catheter seat and the through hole together form a channel for the puncture needle to pass through; the isolation plug is arranged in the catheter seat, the outer wall of the isolation plug is in interference fit with the inner wall of the catheter seat, and the puncture needle penetrates through the isolation plug. Compared with the prior art, the beneficial effects of this application are: the isolating plug and the catheter seat are in interference fit, and the limiting ring for blocking the isolating plug is arranged at the edge of the second end of the catheter seat in a bending and inward extending mode, so that the isolating plug can be effectively blocked from moving outwards, the isolating plug can be prevented from rushing out of the catheter seat under high pressure, the risk of bursting of the indwelling needle is reduced, and the use safety of the indwelling needle is guaranteed; the limiting ring is formed by bending and extending the end part of the catheter base, so that no additional part or adhesive glue is needed, the catheter base has the advantages of simple structure, simple production process, low production cost and strong pressure resistance, meets the long-term development requirements of companies, and effectively solves the technical problem of poor pressure resistance in the prior art.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural view of a high pressure resistant indwelling needle provided in an embodiment of the present application;

FIG. 2 is a drawing showing the connection between the puncture needle and the needle holder according to the embodiment of the present application;

FIG. 3 is a schematic structural view of a catheter hub provided in an embodiment of the present application before processing;

fig. 4 is a schematic structural diagram of a catheter hub provided in an embodiment of the present application after processing.

In the figure:

1 is a catheter seat, 11 is a limit ring, 12 is a through hole, 2 is an indwelling catheter, 3 is an isolating plug, 4 is a puncture needle, 5 is a needle seat, 51 is a needle wing, 511 is a bulge, 6 is a needle tube sheath, 7 is an extension tube, 8 is a liquid stopping clip, 81 is an anti-skid bulge, 91 is a joint, 92 is an end cap, and 93 is a heparin cap.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

The indwelling needle is a medical apparatus for vein indwelling transfusion, is mainly applied to clinical venipuncture, takes medicine and provides nutrition for a patient, can avoid vascular injury caused by multiple punctures and relieve the pain of the patient, and is also favorable for reducing the operation intensity of nurses. In addition, the indwelling needle sometimes needs to be connected with a high-pressure syringe for contrast medium injection before CT examination. The highest pressure that the isolating plug in the catheter seat of the conventional Y-shaped indwelling needle can bear is only 100psi, and the requirement of clinical high-pressure injection (200-300 psi) is far less met. Although some existing indwelling needles can improve the pressure resistance of the isolating plug by means of high-strength glue bonding or by means of adding a pressure-resistant gasket at the outer end of the isolating plug, the pressure resistance improved by means of high-strength glue bonding is limited, so that the pressure resistance of the isolating plug is unreliable, and the indwelling needles bring danger to clinical medical staff when being injected at high pressure; the mode of adding the pressure-resistant gasket not only additionally adds parts, but also is relatively difficult to assemble the pressure-resistant gasket, thereby increasing the production cost of the remaining needle and being not beneficial to the long-term development of companies. The application provides a needle is kept somewhere to high pressure resistant, extends the spacing ring that forms the isolating plug through the tip bending at the pipe seat, has low in production cost, advantage that the compressive capacity is strong, accords with the long-term development's of company demand, solves the technical problem that prior art exists the compressive capacity poor effectively.

Referring to fig. 1, the embodiment of the present application provides a high pressure resistant indwelling needle, which includes a catheter holder 1, an indwelling catheter 2, an isolating plug 3, a puncture needle 4 and a needle holder 5; the first end of the catheter seat 1 is connected with the indwelling catheter 2, the edge of the second end of the catheter seat 1 is bent and extends inwards to form a limiting ring 11, and the edge of the limiting ring 11 surrounds to form a through hole 12; the puncture needle 4 is connected with the needle seat 5, and the inner cavity of the indwelling catheter 2, the inner cavity of the catheter seat 1 and the through hole 12 together form a channel for the puncture needle 4 to pass through; the isolating plug 3 is arranged in the catheter holder 1, the outer wall of the isolating plug 3 is in interference fit with the inner wall of the catheter holder 1, and the puncture needle 4 penetrates through the isolating plug 3.

More specifically, referring to fig. 1, the through hole 12 of the stop collar 11 is not formed on the stop collar 11 by a tool, but is surrounded by the edge of the stop collar 11; the through hole 12 is arranged corresponding to the indwelling catheter 2, namely the through hole 12 and the indwelling catheter 2 are in the same straight line, so that the puncture needle 4 is arranged to sequentially penetrate through the through hole 12, the inner cavity of the catheter holder 1 and the inner cavity of the indwelling catheter 2; the outer wall of the isolating plug 3 is in interference fit with the inner wall of the catheter holder 1, the diameter of the isolating plug 3 is slightly larger than the inner diameter of the catheter holder 1, and the puncture needle 4 penetrates through the isolating plug 3 along the axial direction of the isolating plug 3; the through hole on the isolating plug 3 can be a preset hole before being plugged into the catheter base 1; the end of the puncture needle 4 far away from the needle stand 5 is a needle tip cutting edge.

In order to test the pressure born by the isolating plug 3, various isolating plugs 3 need to be tested, and the testing method specifically comprises the steps of removing the puncture needle 4, the needle seat 5, the needle tube sheath 6 and the heparin cap 93 from the indwelling needle, filling pure water into the indwelling needle, sealing the indwelling needle 2 (the indwelling needle 2 is directly knotted or the indwelling needle 2 is clamped by a clamp), gradually increasing the hydraulic pressure from the second end of the joint 91 (namely the position where the heparin cap 93 is originally assembled) to 350psi, and then keeping for 30 seconds, wherein the whole indwelling needle is qualified if no water leakage occurs. The test shows that: (1) conventional indwelling needles are generally susceptible to water leakage at pressures greater than 100 psi; (2) the isolating plug 3 fixed by the high-strength glue instead of the conventional adhesive is easy to leak water when the pressure is more than 200 psi; (3) the indwelling needle provided by the application can not leak water when the pressure is 350 psi. In conclusion, the pressure resistance of the isolating plug 3 is effectively improved by arranging the limiting ring 11, and the requirement of clinical high-pressure injection (200-300 psi) is met.

This application is when using, puncture effect through pjncture needle 4, make pjncture needle 4 all get into the blood vessel of human body or animal with keeping somewhere pipe 2, then can pull out pjncture needle 4 toward outside through needle file 5, make pjncture needle 4 break away from completely and keep somewhere pipe 2 and pipe seat 1, because the inner wall of pipe seat 1 and the outer wall of isolating plug 3 are interference fit, under the pressure extrusion of pipe seat 1, the very little through hole in isolating plug 3 middle can be airtight by oneself, make pipe seat 1 form sealed in isolating plug 3, so that the infusion flows to keeping somewhere in the pipe 2 and the phenomenon that does not take place the side leakage from pipe seat 1. The beneficial effect of this application is: the isolating plug 3 and the catheter seat 1 are in interference fit, and the limiting ring 11 for blocking the isolating plug 3 is bent and extends inwards at the edge of the second end of the catheter seat 1, so that the isolating plug 3 can be effectively blocked from moving outwards, the isolating plug 3 can be prevented from rushing out of the catheter seat 1 under high pressure, the risk of explosion of the indwelling needle is reduced, and the use safety of the indwelling needle is ensured; because the limiting ring 11 is formed by bending and extending the end part of the conduit seat 1, no additional part and adhesive glue are needed, the conduit seat has the advantages of simple structure, simple production process, low production cost and strong pressure resistance, meets the long-term development requirements of companies, and effectively solves the technical problem of poor pressure resistance in the prior art.

Further, in the present embodiment, the stop collar 11 is formed by hot-pressing the second end edge of the catheter hub 1. During assembly, referring to fig. 3, the isolating plug 3 is firstly plugged into the inner cavity of the catheter hub 1 from the second end of the catheter hub 1 until the isolating plug 3 is completely plugged into the catheter hub 1 and the isolating plug 3 has a certain distance from the edge of the second end of the catheter hub 1, and then the isolating plug 3 and the catheter hub 1 are fixed by a conventional adhesive; referring to fig. 4, the second end edge of the catheter hub 1 is heated to soften the second end edge of the catheter hub 1, and then the second end edge of the catheter hub 1 is pressed by a tool in a direction close to the isolation plug 3, so that the second end edge of the catheter hub 1 is attached to the end of the isolation plug 3, and at this time, a through hole 12 is formed in the middle of a limiting ring 11 formed by bending the second end edge of the catheter hub 1; referring to fig. 1, the puncture needle 4 sequentially passes through the through hole 12, the isolating plug 3, the inner cavity of the catheter holder 1 and the inner cavity of the indwelling catheter 2, and one end of the puncture needle 4, which is far away from the needle holder 5, is exposed at the front end of the indwelling catheter 2, so that the assembly of the whole indwelling needle can be completed. Certainly also can be through other modes to the second end edge of pipe seat 1 processing, and hot pressing is this application provides a better processing mode, and the bending deformation can be convenient for to pipe seat 1 to being heated, and spacing ring 11 after the cooling can harden, has good hardness in order to block that isolation plug 3 is washed out pipe seat 1 by high-pressure fluid.

Further, in the present embodiment, when the through-hole 12 has a circular shape, the diameter of the through-hole 12 is 1.5mm to 2.0 mm. The smaller the area of the limiting ring 11 is, that is, the larger the diameter of the through hole 12 is, the poorer the blocking effect of the limiting ring 11 on the isolating plug 3 is, that is, the poorer the pressure resistance of the isolating plug 3 is; the larger the area of the limiting ring 11 is, that is, the smaller the diameter of the through hole 12 is, the better the blocking effect of the limiting ring 11 on the isolating plug 3 is, that is, the better the pressure resistance of the isolating plug 3 is. Therefore, the size of the through hole 12 needs to be limited, but the puncture needle 4 can pass through the through hole 12, the outer diameter of the puncture needle 4 with the largest size is 0.9mm, when the puncture needle 4 passes through the through hole 12, the needle tip of the puncture needle 4 cannot touch the catheter seat 14 and the through hole 12, otherwise the puncture needle 4 is easily scrapped, and therefore a steel needle with the diameter of 0.9mm needs to be designed into a hole with the diameter of 1.5 mm-2.0 mm; therefore, in consideration of the assembly precision, the diameter of the through hole 12 is selected to be 1.5 mm-2.0 mm during processing, which can ensure that the puncture needle 4 can pass through the through hole 12 and the spacing ring 11 has good blocking effect on the isolating plug 3.

Further, in the present embodiment, referring to fig. 1, an end of the isolation plug 3 abuts against the limit ring 11, and the end of the isolation plug 3 is preferably attached to the sidewall of the limit ring 11. When the second end edge of the conduit seat 1 is subjected to hot pressing, the best effect is that the second end edge of the conduit seat 1 is pressed on the end part of the isolating plug 3, and the pressure resistance of the isolating plug 3 can be effectively improved through the combination of the friction force between the isolating plug 3 and the conduit seat 1 and the blocking of the isolating plug 3 by the limiting ring 11.

Further, in this embodiment, please refer to fig. 1, during assembly, the needle seat 5 is sleeved on the periphery of the catheter seat 1, which is beneficial for the medical staff to perform the puncturing operation when using the indwelling needle, and through the needle seat 5 sleeved on the catheter seat 1, the medical staff feels better when pricking the needle for the patient, so that the success rate of puncturing the blood vessel is higher. Referring to fig. 2, a groove is concavely arranged at one end of the needle seat 5 close to the puncture needle 4, the groove is matched with the periphery of the catheter seat 1, and the puncture needle 4 is fixedly connected with the needle seat 5 through glue or other methods; during assembly, the puncture needle 4 sequentially penetrates through the through hole 12, the isolating plug 3, the inner cavity of the catheter holder 1 and the inner cavity of the indwelling catheter 2, and the needle seat 5 can be sleeved on the periphery of the catheter holder 1 through the groove.

Further, in the present embodiment, referring to fig. 1 or fig. 2, a needle wing 51 is connected to the needle base 5, and a protrusion 511 is disposed on the needle wing 51. In the puncture, the blade of the needle blade 51 and the catheter hub 1 are pinched by a hand with a natural force, and the puncture needle 4 and the indwelling needle catheter are inserted into the blood vessel through the skin together. The protrusion 511 is provided to effectively increase the friction force between the needle wing 51 and human hand, so that the user can better hold the needle wing 51. The protrusion 511 may be formed in a semi-spherical shape or an elliptical shape. The projections 511 are provided in a plurality of rows, and the plurality of rows of projections 511 are uniformly provided on the wing plate of the needle wing 51. In addition, the needle wing 51 can be replaced by a handheld hole, that is, the needle wing 51 is provided with a handheld hole, and the handheld hole can also play a role in increasing the friction force between the needle wing 51 and a human hand, so that a user can better hold the needle wing 51.

Further, in the present embodiment, please refer to fig. 1, further comprising a needle sheath 6, wherein the needle sheath 6 is disposed around the outer circumference of the indwelling catheter 2. The inner wall of the needle tube sheath 6 is matched with the periphery of the first end of the catheter holder 1, and the needle tube sheath 6 is detachably sleeved on the periphery of the first end of the catheter holder 1, so that the needle head of the indwelling catheter 2 and the puncture needle 4 can be wrapped by the needle tube sheath 6, and the indwelling needle scrapping caused by damage to the indwelling catheter 2 or the puncture needle 4 can be effectively avoided.

Further, in the embodiment, the infusion set is further included, and comprises an extension pipe 7, a liquid stopping clamp 8 and a three-way connecting pipe; the first end of extension pipe 7 is connected with the lateral wall of pipe seat 1, and the second end of extension pipe 7 is connected with the tee bend takeover, ends liquid clamp 8 and installs on extension pipe 7, and the tee bend takeover includes joint 91, end cap 92 and heparin cap 93, and the first end of joint 91 is connected with extension pipe 7, and the second end of joint 91 is connected with heparin cap 93, and end cap 92 is connected with the lateral wall of joint 91. After the puncture needle 4 is pulled out, liquid can be supplied to the catheter seat 1 and the indwelling catheter 2 through the infusion component, and infusion for a patient is realized. The liquid stop clamp 8 can open and close the extension tube 7. In addition, because the production of the heparin cap 93 needs to utilize the same hot pressing process, the formation of the limit ring 11 does not need to prepare additional production equipment, and the production cost of the indwelling needle is effectively reduced.

Further, in this embodiment, the liquid stopping clip 8 is provided with the skidproof protrusions 81, and the skidproof protrusions 81 may be in a semi-spherical shape, an elliptical spherical shape, or a saw-toothed shape. The anti-slip protrusions 81 can effectively increase the friction force between the liquid-stopping clip 8 and the human hand, so that the user can better hold the liquid-stopping clip 8. The semi-spherical or oval-spherical anti-slip protrusions 81 can increase the friction force appropriately and effectively protect the fingers from being scratched. The serrated anti-slip protrusions 81 cause a larger frictional force to be generated between the human hand and the liquid-stopping clip 8 than the semi-spherical anti-slip protrusions 81.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A high pressure resistant remaining needle is characterized by comprising a catheter seat, a remaining catheter, an isolating plug, a puncture needle and a needle seat;

the first end of the catheter seat is connected with the indwelling catheter, the edge of the second end of the catheter seat is bent and extends inwards to form a limiting ring, and the edge of the limiting ring surrounds and forms a through hole;

the puncture needle is connected with the needle seat, and the inner cavity of the indwelling catheter, the inner cavity of the catheter seat and the through hole together form a channel for the puncture needle to pass through;

the isolation plug is arranged in the catheter seat, the outer wall of the isolation plug is in interference fit with the inner wall of the catheter seat, and the puncture needle penetrates through the isolation plug.

2. The high pressure resistant indwelling needle according to claim 1, wherein the diameter of the through hole is 1.5mm to 2.0 mm.

3. The high pressure resistant indwelling needle of claim 1, wherein the end of the isolating plug abuts against the stop collar.

4. The high pressure resistant indwelling needle of claim 1, wherein the stop collar is formed by hot pressing the second end edge of the catheter hub.

5. The high pressure resistant indwelling needle according to claim 1, wherein the hub is fitted over the outer circumference of the catheter hub.

6. The high pressure resistant indwelling needle according to claim 1, wherein a needle wing is connected to the needle hub, and a protrusion is provided on the needle wing.

7. The high pressure resistant indwelling needle of claim 1, further comprising a needle sheath disposed around the outer circumference of the indwelling catheter.

8. The high pressure resistant indwelling needle according to claim 1, further comprising an infusion set comprising an extension tube, a liquid stop clip and a three-way connector;

the first end of the extension pipe is connected with the side wall of the catheter seat, the second end of the extension pipe is connected with the three-way connecting pipe, and the liquid stopping clamp is installed on the extension pipe;

the tee joint pipe comprises a joint, an end cap and a heparin cap, wherein the first end of the joint is connected with the extension pipe, the second end of the joint is connected with the heparin cap, and the end cap is connected with the side wall of the joint.

9. The high pressure resistant indwelling needle according to claim 8, wherein the liquid stopping clip is provided with anti-skid projections.

10. The high pressure resistant indwelling needle of claim 9, wherein the non-slip protrusions are semi-spherical, elliptical or serrated.

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