CN212574935U

CN212574935U - Cricothyroid membrane puncture needle

Info

Publication number: CN212574935U
Application number: CN202020276429.4U
Authority: CN
Inventors: 安奕; 赵磊; 王天龙; 杨静; 王萍; 李丽霞; 李中嘉
Original assignee: Xuanwu Hospital
Current assignee: Xuanwu Hospital
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2021-02-23
Anticipated expiration: 2030-03-09

Abstract

The utility model discloses a cricothyroid membrane puncture needle, which comprises a cannula component and a stylet component, wherein the stylet component comprises a needle seat, a stylet and two limiting devices, one end of the stylet is fixed to the central position of the needle seat, one ends of the two limiting devices are respectively fixed to the edge position of the needle seat, the two limiting devices are symmetrically arranged at the two sides of the stylet, in addition, a gap is formed between the two limiting devices and the stylet, and a gap is reserved between the opposite end surfaces of the two limiting devices; the length of the limiting device is shorter than that of the needle core. The utility model provides a novel cricothyroid membrane pjncture needle through fixing stop device and nook closing member simultaneously on the needle file, combines the application method of trocar, can guarantee that the puncture position is correct at the puncture in-process, and the degree of depth is moderate, can effectively reduce the trachea simultaneously and chock the incidence of the air flue damage that induces when dosing in the patient.

Description

Cricothyroid membrane puncture needle

Technical Field

The utility model relates to a cricothyroid membrane pjncture needle especially relates to and carries out the pjncture needle of surface anesthesia to the air flue mucous membrane, belongs to medical instrument technical field.

Background

The anesthesia of the mucous membrane surface of the airway by the puncture of the cricothyroid membrane is one of the important auxiliary measures for performing the conscious tracheal intubation when an anaesthetist deals with the difficult airway, and the operation is performed under the blind detection of a common syringe in the past.

However, this approach has the following problems: 1. when puncturing, if the needle tip inclined plane of the injector does not completely enter the air passage, the anesthesia position may be inaccurate; 2. severe cough can be induced when the medicine is administrated in the trachea, and at the moment, the metal needle tip exists in the airway, so that the risk of damaging the airway wall and even other important structures around the airway wall can exist; 3. limited by the overall shape of the injector, the amplitude of the administration angle adjustment is small, the risk of damaging surrounding tissues after the angle adjustment is increased, the administration can not be continuously carried out in an air passage, and the anesthesia effect is sometimes not ideal.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a cricothyroid membrane puncture needle.

In order to realize the technical purpose, the utility model adopts the following technical scheme:

a cricothyroid membrane puncture needle comprises a cannula assembly and a stylet assembly, wherein the stylet assembly comprises a needle seat, a stylet and two limiting devices, one end of the stylet is fixed to the center of the needle seat, one ends of the two limiting devices are respectively fixed to the edge of the needle seat, the two limiting devices are symmetrically arranged on two sides of the stylet, a gap is formed between the two limiting devices and the stylet, and a gap is reserved between the opposite end faces of the two limiting devices; the length of the limiting device is shorter than that of the needle core.

Wherein preferably, the length of stop device is less than the length of nook closing member 13 ~ 17 mm.

Preferably, the limiting device is an arc-shaped sheet.

Preferably, the needle base is provided with two symmetrical fan-shaped circles, and one ends of the two limiting devices are respectively fixed at the edge positions of the two fan-shaped circles. Or, preferably, the needle seat is provided with a part for fixing the limiting device, and the two parts for fixing the limiting device are integrally connected by using a connecting part with parallel edges in the middle.

Preferably, the sleeve assembly comprises a sleeve and a rubber cap, wherein the rubber cap is used for closing one end of the sleeve, and the other end of the sleeve forms an opening; a bendable infusion tube communicated with the sleeve is arranged on one side of the sleeve, and an injector joint is arranged at the end part of the bendable infusion tube; the other side of the sleeve is connected with a handheld part.

Preferably, a plurality of side holes are formed in the tube wall of one end of the sleeve close to the opening.

Preferably, the length of the area of the sleeve in which the side hole is arranged is less than 10 mm.

Preferably, the pipe wall of the end of the sleeve close to the opening is provided with a scale.

Preferably, the positions at the distance of 0.5cm, 1.5cm and 2.5cm from the end part of the sleeve and the positions at 1cm, 2cm and 3cm are marked by using scale marks with different colors or different line types, and the scale mark at the position of 2cm is different from the scale marks at the positions at 1cm and 3 cm.

The utility model provides a novel cricothyroid membrane pjncture needle, including thimble assembly and nook closing member subassembly, wherein, in the nook closing member subassembly, through fixing nook closing member and two stop device on the needle file to combine the use of trocar, can guarantee that the puncture position is correct at the puncture in-process, the degree of depth is moderate, and the patient chocks the incidence of the air flue damage that induces when effectively reducing simultaneously and dosing in the trachea.

Drawings

Fig. 1 is a schematic structural view of a cricothyroid membrane puncture needle provided by the utility model;

FIG. 2 is a schematic structural view of the bushing assembly of FIG. 1;

FIG. 3 is an enlarged schematic view of the forward end A of the cannula of FIG. 2;

FIG. 4 is a schematic structural view of the plunger assembly of FIG. 1;

FIG. 5 is a schematic left side view of the cricothyroid needle of FIG. 1;

FIG. 6 is a schematic diagram of the configuration of the cricothyroid needle of FIG. 1 as viewed from the right;

fig. 7 is a schematic view of another alternative core assembly.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 4, the novel cricothyroid membrane puncture needle provided by the present invention comprises a cannula component 1 and a stylet component 2, wherein the cannula component 1 and the stylet component 2 form a trocar. The needle 21 of the needle assembly 2 is inserted into the cannula 11 of the cannula assembly 1 for puncturing and after the needle assembly 2 is withdrawn, the cannula 11 of the cannula assembly 1 is used for injecting a liquid, such as a local anesthetic or other medication. This way of administering the drug using the cannula 11 of the cannula assembly 1 after withdrawal of the stylet assembly 2 can avoid the damage of the metal stylet to the airway during coughing.

As shown in FIG. 2, the cannula assembly 1 includes a cannula 11, a rubber cap 12, a flexible infusion tube 17 and a handpiece 16. Wherein the sleeve 11 is a plastic sleeve, and the sleeve is a hollow tube. One end of the sleeve 11 is closed by a rubber cap 12, and the other end of the sleeve 11 is formed with an opening. The rubber cap 12 has good elasticity, and can be tightly closed after the needle core 2 is drawn out, and the rubber cap 12 needs to avoid aging and elasticity reduction. A bendable infusion tube 17 communicated with the sleeve 11 is arranged at one side of the sleeve 11, one end of the bendable infusion tube 17 is fixed with the sleeve 11, and the other end of the bendable infusion tube 17 is provided with an injector joint 18 which is used for being tightly connected with an injector. A sheet-like hand-held portion 16 is connected to the other side of the cannula 11 (i.e., the side opposite to the bendable infusion tube 17 at 180 degrees). The hand-held part 16, the bendable infusion tube 17 and the rubber cap 12 are tightly connected with the sleeve 11. The material selection of the cannula assembly 11 may be referenced to an indwelling needle.

The cannula 11 is used for administration after puncture. In order to improve the administration effect, a plurality of directional side holes 14 are formed on the side wall of the cannula 11 near the open end, and the diameter of the side holes 14 is about 1 mm. The length of the area 13 of the sleeve 11 where the side hole 14 is provided is less than 10mm (preferably 7-9 mm). The side hole 14 is arranged on the tube wall at the front end of the sleeve 11, so that the traditional Chinese medicine liquid can be sprayed out from the side hole 14 and the opening at the front end of the sleeve 11 in multiple directions simultaneously, and the anesthesia effect is better. Moreover, different parts in the air passage can be anesthetized by adjusting the penetration depth and the administration angle of the sleeve 11, so that the anesthetic effect is improved.

As shown in fig. 2 and 3, after the puncture, in order to quantitatively adjust the puncture depth of the cannula 11, a scale is provided on the side wall of the cannula 11 near the end of the opening. For the convenience of observation by an operator, the positions at a distance of 0.5cm, 1.5cm and 2.5cm from the end of the sleeve 11 and the positions at 1cm, 2cm and 3cm are marked with scale marks of different colors or different line types, and the scale mark at the position of 2cm may be different from the scale mark at the positions at 1cm and 3 cm. For example, the scale lines 0.5cm, 1.5cm, 2.5cm are set to black, and the scale lines 1.0cm, 2.0cm, 3.0cm are set to red; further alternatively, the scale lines 15A of 0.5cm, 1.5cm and 2.5cm are broken lines, and the scale lines 15A of 1.0cm, 2.0cm and 3.0cm are solid lines, wherein a single solid line is used for the scale lines 15B of 1.0cm and 3.0cm, and a double solid line is used for the scale line 15C at 2.0 cm. Alternatively, the line widths or colors of the scale line 15A, the scale line 15B, and the scale line 15C are made different.

As shown in fig. 4, the core assembly 2 includes a core 21, two stoppers 22 and a needle holder 23, and the core assembly 2 may be entirely made of metal. One end of the stylet 21 is fixed to the center of the needle seat 23, one ends of the two limiting devices 22 are respectively fixed to the edge of the needle seat 23, the two limiting devices 22 are symmetrically arranged on two sides of the stylet 21, a gap for the cannula 11 to pass through is formed between the two limiting devices 22 and the stylet 21, and a gap for the handheld part 16 on two sides of the cannula 11 and the bendable infusion tube 17 to pass through is reserved between the two limiting devices 22.

Specifically, in the above structure, the needle core 21 is a solid metal needle, the needle tip of the needle core 21 is designed to be beveled, and the tip of the needle tip slightly exceeds the foremost end of the cannula 11. The length of the stylet 21 is approximately 50mm and the outer diameter of the stylet 21 and the inner diameter of the cannula 11 are approximately the same size so that the cannula 11 can be fitted as tightly as possible over the stylet 21 without affecting the relative movement therebetween. The length of the stylet 21 is greater than the length of the cannula 11. Preferably, the length of the stylet 21 is 1mm longer than the length of the cannula 11.

As shown in fig. 5 and 6, the cross-sectional shape of the stopper 22 is an arc, and the stopper 22 is an arc-shaped metal sheet. The central angle of the stop 22 is less than 180 degrees. In order to avoid the puncture depth being too deep during the puncture operation, the length of the limiting device 22 is shorter than that of the stylet 21. The limiting device 22 is shorter than the needle core 21 by a proper length, so that the air inlet channel can be punctured and the mucous membrane of the rear wall of the air channel is not damaged. Preferably, the length of the stop 22 is 13-17 mm less than the length of the core 21 (see the length L of the portion 24 of the core 21 beyond the stop 22 in FIG. 4).

For example, the cannula 11 and the stylet 21 are respectively made to satisfy the following dimensional parameters: the cannula 11 is a cannula having an outer diameter of 22G (G is an abbreviation of Guage, which represents the type of cannula, and is the same as the indwelling needle), the core 21 has a length of 50mm and a tip 1mm longer than the cannula 11, and the outer diameter of the core 21 is approximately the same as the inner diameter of the cannula 11. The limiting device 23 is 15mm shorter than the stylet 21.

As shown in fig. 5 to 7, the needle seat 23 is used for fixing the stylet 21 and the limiting device 22, the structure of the needle seat 23 is not limited, and the needle seat 23 only needs to be capable of fixing the stylet 21 and the limiting device 22, and facilitates the puncturing operation.

The structure of the needle seat 23 can be as shown in fig. 5 and 6, the needle seat 23 has two symmetrical fan-shaped, the central angle θ of the fan-shaped is smaller than 180 degrees, the centers of the two fan-shaped are connected, and one end of each of the two limiting devices is fixed to the edge position of the two fan-shaped. Preferably, the circular angle θ of the sector is between 60 and 120 degrees, so as to facilitate the insertion of the core 2 into the cannula 11 by holding the needle holder 23.

The structure of the needle holder may also be such that, as shown in fig. 7, the needle holder 23' has a portion for fixing the stopper 22, and two portions for fixing the stopper 22 are integrally connected with an edge-parallel connecting portion therebetween. The structure of the needle holder is not limited to the structure shown in the above figures.

In the novel cricothyroid membrane puncture needle, the trocar is used, the trocar core 21 and the two limiting devices 22 are simultaneously fixed on the needle seat 23, the puncture position can be ensured to be correct in the puncture process by combining the use method of the trocar, the depth is moderate, and the occurrence rate of airway injury induced by patient choking cough during endotracheal administration is effectively reduced.

For fixing the limiting device on the sleeve, or directly using the injector to perform anesthesia, and arranging the limiting device on the injector for administration, the limiting device and the needle core are simultaneously fixed on the needle seat, so that the puncturing depth can be more flexibly adjusted after the needle core assembly is withdrawn, and the puncturing and anesthetic injection operations are convenient.

The following is a detailed description of the method of using the above-described novel cricothyroid needle.

Before use, the stylet 21 of the stylet assembly 2 pierces the rubber cap 12 of the cannula assembly 1, and the stylet 21 fits tightly over the cannula 11, which is designed to facilitate insertion of the cannula 11 after piercing the skin, subcutaneous tissue and cricothyroid membrane.

During the puncture process, the limiting device 22 of the stylet assembly 2 can avoid the puncture from damaging the back wall of the air passage too deeply. Then, the injector connector 18 is externally connected with an injector which pumps local anesthetic, and the needle core component 2 is pulled out after a large amount of continuous bubbles appear in the back pumping in the puncturing process. After the scale on the side wall of the sleeve 11 is recorded, the sleeve 11 enters a little depth, the rubber cap 12 and the external injector can effectively seal the air passage to avoid infection, the injector is drawn back again, and local anesthetic is injected after the position of the sleeve 11 is confirmed to be correct. At this time, only the plastic cannula 11 is retained in the airway, so as to avoid the damage caused by the metal needle core 21 when the patient is choked; in addition, the side hole 14 at the tip of the sleeve 11 enables the local anesthetic to be sprayed in multiple directions, so that the anesthetic effect is enhanced.

In addition, an anesthesiologist can also perform multi-angle and multi-azimuth airway surface anesthesia by adjusting the entering angle of the sleeve 11 (the angle is adjusted according to clinical experience), so that the anesthesia effect is improved, and the incidence rate of airway injury is not increased. At the same time, the cannula 11 is left in the airway and can be used for continuous administration if necessary.

In the cricothyroid membrane puncture needle, the side wall of the front end of the sleeve outside the needle core is provided with a plurality of side holes, when in use, the side holes and the front end opening are used for feeding medicine together, and the liquid medicine is sprayed out in a plurality of directions, so that the anesthesia effect is good; the local anesthetic liquid spraying position can be adjusted by adjusting the insertion depth of the sleeve, mucous membranes on and under the glottis are fully anesthetized, and the anesthetic effect is optimized.

The cricothyroid membrane puncture needle provided by the present invention has been explained in detail above. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, without departing from the spirit of the present invention, and it is intended to constitute a violation of the patent rights of the present invention and to bear the relevant legal responsibility.

Claims

1. A cricothyroid membrane puncture needle is characterized by comprising a cannula assembly and a stylet assembly, wherein the stylet assembly comprises a needle base, a stylet and two limiting devices, one end of the stylet is fixed to the center of the needle base, one ends of the two limiting devices are respectively fixed to the edge of the needle base, the two limiting devices are symmetrically arranged on two sides of the stylet, a gap is formed between the two limiting devices and the stylet, and a gap is reserved between the opposite end faces of the two limiting devices; the length of the limiting device is shorter than that of the needle core.

2. A cricothyroid membrane puncture needle as in claim 1, wherein:

the length of the limiting device is 13-17 mm less than that of the needle core.

3. A cricothyroid membrane puncture needle as in claim 1, wherein:

the limiting device is an arc-shaped sheet.

4. A cricothyroid membrane puncture needle as in claim 1, wherein:

the needle base is provided with two symmetrical fan-shaped circles which are connected, and one ends of the two limiting devices are respectively fixed at the edge positions of the two fan-shaped circles.

5. A cricothyroid membrane puncture needle as in claim 1, wherein:

the needle seat is provided with a part for fixing the limiting device, and the two parts for fixing the limiting device are connected into a whole by using a connecting part with parallel edges in the middle.

6. A cricothyroid membrane puncture needle as in claim 1, wherein:

the sleeve assembly comprises a sleeve and a rubber cap, the rubber cap is used for closing one end of the sleeve, and the other end of the sleeve forms an opening; a bendable infusion tube communicated with the sleeve is arranged on one side of the sleeve, and an injector joint is arranged at the end part of the bendable infusion tube; the other side of the sleeve is connected with a handheld part.

7. A cricothyroid membrane puncture needle as in claim 6, wherein:

side holes in multiple directions are formed in the pipe wall of one end, close to the opening, of the sleeve.

8. A cricothyroid membrane puncture needle as in claim 7, wherein:

the length of the area with the side hole in the sleeve is less than 10 mm.

9. A cricothyroid membrane puncture needle according to claim 6 or 7, wherein:

and scales are arranged on the pipe wall of one end of the sleeve close to the opening.

10. A cricothyroid membrane puncture needle as in claim 9, wherein:

the positions at the distances of 0.5cm, 1.5cm and 2.5cm from the end part of the sleeve and the positions at 1cm, 2cm and 3cm are marked by using scale marks with different colors or different line types, and the scale mark at the position of 2cm is different from the scale mark at the positions at 1cm and 3 cm.