CN214678984U

CN214678984U - Disposable continuous nerve block trocar

Info

Publication number: CN214678984U
Application number: CN202122160548.0U
Authority: CN
Inventors: 罗萍; 朱明达; 王伟国; 张苗苗
Original assignee: First Medical Center of PLA General Hospital
Current assignee: First Medical Center of PLA General Hospital
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2021-11-12
Anticipated expiration: 2031-09-08

Abstract

A disposable continuous nerve block trocar belongs to the technical field of medical instruments. The puncture needle comprises a sleeve and a puncture needle, wherein the head part of the sleeve is provided with an opening, the tail part of the sleeve is provided with an interface, and the tip end of the puncture needle is matched with the front side of the head part of the sleeve; one end of the sleeve close to the tail part is provided with a sliding groove, and a sliding block matched in the sliding groove is arranged on the puncture needle in a matching way. The utility model discloses avoid the nook closing up, reduce the time spent, the through-hole still is used as the medicine supply mouth, takes the back out at the pjncture needle, and the liquid medicine can get into from the through-hole side for the medicine supply speed has increased the medicine supply region, has accelerated the medicine diffusion, has improved puncture efficiency greatly.

Description

Disposable continuous nerve block trocar

Technical Field

The utility model relates to a disposable continuous nerve blocking trocar, which belongs to the technical field of medical instruments.

Background

At present, the needle core part of the existing nerve block puncture trocar is mostly arranged in a hollow way, so that the puncture needle can be connected with a device to inject local anesthetic after the successful nerve block puncture is carried out, and continuous nerve block can be carried out after the puncture needle is arranged in the trocar. However, when the hollow needle needs to be punctured repeatedly in case of difficult puncturing, subcutaneous adipose tissues enter the needle core frequently to cause the condition of blocking the needle core, meanwhile, the problem that the sleeve is blocked and accumulated, the needle cannot enter a target position smoothly, certain difficulty is caused to puncturing, time consumption is increased, when the needle tube in the continuous nerve block suit is placed, only one opening at the head is used for medicine to enter, the maximum medicine injection speed is reduced, the medicine supply efficiency is influenced, in addition, the medicine supply area is small, the medicine supply is too concentrated, the medicine diffusion is slow, when the nerve block is carried out in a large area, the medicine takes effect slowly, and the nerve block efficiency is limited to a great extent.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a disposable continuous nerve block trocar.

The disposable continuous nerve block trocar comprises a cannula and a puncture needle, wherein the head part of the cannula is provided with an opening, the tail part of the cannula is provided with an interface, the tip end of the puncture needle is matched with the front side of the head part of the cannula, one end close to the head part of the cannula is provided with a plurality of through holes, the puncture needle is provided with a plurality of elastic limit piles, each elastic limit pile is correspondingly matched in one through hole, and the elastic limit piles are used for preventing the cannula from being blocked during puncture to cause unidirectional limit which can not enter a target position; one end of the sleeve close to the tail part is provided with a sliding groove, and a sliding block matched in the sliding groove is arranged on the puncture needle in a matching way.

Furthermore, the puncture needle is a solid needle, and the sleeve is made of medical plastic.

Furthermore, the tail part of the puncture needle is provided with an end cover which is in clearance fit with the interface, and the end cover is in a handle shape.

Further, the through holes are evenly distributed on the sleeve.

Furthermore, the through holes are uniformly arranged in rows, at least comprise two rows which are opposite to each other, and the tail part of the puncture needle is arranged.

Furthermore, an elastic limiting pile is matched in each through hole.

Furthermore, the elastic limiting pile is a limiting elastic sheet.

Further, the spacing stake of elasticity includes elastic main body and spacing end, and spacing end includes smooth portion and spacing portion.

Further, the interface comprises a main medicine injection port connector and a one-way medicine injection side branch opening connector

The utility model has the advantages that: the puncture needle is a solid needle, so that the blockage of a needle core is avoided, and the solid needle is favorable for the connection arrangement of the elastic limiting pile in the utility model; the end cover arranged at the tail part of the puncture needle can block the interior of the sleeve, keep good position matching before use, avoid damaging the elastic limiting pile and the like, and is in a handle shape to facilitate the retraction of the puncture needle; the elastic limiting pile is matched with the through hole for one-way limiting, so that the sleeve cannot be blocked and accumulated during puncture, the puncture is smoothly performed, the puncture efficiency is improved when the use is reduced, meanwhile, the puncture needle can be drawn out, and the elastic limiting pile is provided with a smooth part to facilitate the drawing out of the puncture needle; the through hole is also used as a medicine supply port, and after the puncture needle is drawn out, the liquid medicine can enter from the side surface of the through hole, so that the medicine supply speed is increased, the medicine supply area is increased, the medicine diffusion is accelerated, and the puncture efficiency is greatly improved.

Drawings

The invention itself, however, as well as many of the attendant advantages thereof, will be best understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein like reference numerals indicate like parts throughout the several views, and wherein:

FIG. 1 is a schematic view of the overall fitting structure of the present invention;

FIG. 2 is a schematic view of the structure of the puncture needle of the present invention;

FIG. 3 is a schematic view of the structure of the casing according to the present invention;

fig. 4 is another structural schematic diagram of the sleeve of the present invention;

in the figure: the puncture needle comprises a cannula 1, a connector 11, a sliding groove 12, a through hole 13, a puncture needle 2, a tip 21, a handle 22, an elastic limiting pile 23, an elastic main body 231, a smooth part 2311, a limiting part 2312 and a sliding block 24.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Obviously, many modifications and variations of the present invention based on the spirit of the present invention will be apparent to those skilled in the art.

It will be understood by those within the art that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element, component or section is referred to as being "connected" to another element, component or section, it can be directly connected to the other element or section or intervening elements or sections may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art.

The following examples are further illustrative in combination to facilitate understanding of the embodiments, and are not to be construed as limiting the invention.

Example 1: as shown in fig. 1, 2, 3 and 4, the disposable continuous nerve block trocar comprises a cannula 1 and a puncture needle 2, wherein the head of the cannula 1 is provided with an opening, the tail of the cannula is provided with a port 11, the tip 21 of the puncture needle 2 is matched with the front side of the head of the cannula 1, one end close to the head of the cannula 1 is provided with a plurality of through holes 13, the puncture needle 2 is provided with a plurality of elastic limit piles 23, each elastic limit pile 23 is correspondingly matched with one through hole 13, so that a plurality of through holes 13 can be arranged, only part of the through holes 13 are matched with the elastic limit piles 23, and the elastic limit piles 23 are used for preventing the cannula 1 from being blocked during puncture to cause unidirectional limit which can not enter a target position; the sleeve 1 is provided with a sliding groove 12 at one end close to the tail part, and the puncture needle 2 is provided with a sliding block 24 matched with the sliding groove 12. The sliding groove 12 and the sliding block 24 are matched for guiding, so that when multi-stage puncture is carried out, namely after one-stage puncture is carried out, when inward puncture is required to be continued, the puncture needle 2 can be placed into the sleeve 1 again, and at the moment, the elastic limiting pile 23 can smoothly enter the corresponding through hole 13 for one-way limiting, so that the puncture is continued.

The puncture needle 2 is a solid needle, and the cannula 1 is medical plastic.

The tail part of the puncture needle 2 is provided with an end cover which is in clearance fit with the interface 11, and the end cover is in a handle 22 shape.

The through holes 13 are evenly distributed over the sleeve 1. The through hole 13 is matched with the elastic limiting pile 23 for one-way limiting in the puncture entering stage, and is a medicine supply hole when the puncture needle 2 is drawn out for medicine supply, so that the device plays two roles and plays multiple roles. The uniform distribution is that the sleeve 1 can be limited in all directions by the elastic limiting piles 23, so that the phenomenon that the stress is uneven is avoided, and the matching between the puncture needle 2 and the sleeve 1 is influenced.

The through holes 13 are uniformly arranged in rows, at least comprise two rows which are opposite to each other, and the tail part of the puncture needle 2 is arranged.

An elastic limiting pile 23 is matched in each through hole 13, and therefore the through holes 13 and the elastic limiting piles 23 are arranged in a one-to-one correspondence mode.

The elastic limiting pile 23 is a limiting elastic sheet made of plastic; as shown in fig. 2, the elastic stopper 23 includes an elastic body 231 and a stopper end including a smooth portion 2311 and a stopper portion 2312.

The interface 11 can also be connected with a connector with multiple liquid inlets, or the interface 11 can also comprise a main medicine injection port and a one-way medicine injection side branch opening connector, the main medicine injection port is used when a large amount of medicine needs to be injected quickly, and the one-way medicine injection side branch opening is used for continuous medicine injection with small dosage.

To sum up, the beneficial effects of the utility model are that: the puncture needle 2 is a solid needle, so that the blockage of a needle core is avoided, and the solid needle is favorable for the connection arrangement of the elastic limit pile 23 in the utility model; the end cover arranged at the tail part of the puncture needle 2 can block the interior of the sleeve 1 and keep good position matching before use, so that the elastic limiting pile 23 is prevented from being damaged, and the other part is arranged in a handle 22 shape, so that the puncture needle 2 can be withdrawn; the elastic limiting pile 23 is matched with the through hole 13 for one-way limiting, so that the sleeve 1 cannot be blocked and accumulated during puncture, the puncture is smoothly performed, the puncture efficiency is improved when the use is reduced, meanwhile, the puncture needle 2 can be drawn out, and the elastic limiting pile 23 is provided with a smooth part 2311, so that the puncture needle 2 can be drawn out conveniently; the through hole 13 is also used as a medicine supply port, and after the puncture needle 2 is drawn out, the liquid medicine can enter from the side surface of the through hole 13, so that the medicine supply speed is increased, the medicine supply area is increased, the medicine diffusion is accelerated, and the puncture efficiency is greatly improved.

As described above, although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that many modifications are possible without substantially departing from the invention and its effects. Therefore, all such modifications are included in the scope of the present invention.

Claims

1. The disposable continuous nerve block trocar comprises a cannula and a puncture needle, wherein the head of the cannula is provided with an opening, the tail of the cannula is provided with an interface, and the tip of the puncture needle is matched with the front side of the head of the cannula; one end of the sleeve close to the tail part is provided with a sliding groove, and a sliding block matched in the sliding groove is arranged on the puncture needle in a matching way.

2. The disposable continuous nerve block trocar of claim 1, wherein the puncture needle is a solid needle.

3. The disposable continuous nerve block trocar according to claim 1, wherein an end cap is arranged at the tail part of the puncture needle, the end cap is in clearance fit with the interface, and the end cap is in a handle shape.

4. The disposable continuous nerve block trocar of claim 1, wherein the through holes are evenly distributed on the cannula.

5. The disposable continuous nerve block trocar according to claim 1, wherein the through holes are uniformly arranged in rows, at least comprising two opposite rows, and the tail of the puncture needle is arranged.

6. The disposable continuous nerve block trocar of claim 5, wherein an elastic stop peg is fitted into each through hole.

7. The disposable continuous nerve block trocar according to claim 1, wherein the elastic limiting pile is a limiting elastic sheet.

8. The disposable continuous nerve block trocar of claim 1, wherein the elastic stop peg comprises an elastic body and a stop end, the stop end comprising a smooth portion and a stop portion.