CN211381646U - A low-invasive lumbar puncture needle - Google Patents

Abstract

The present application relates to the technical field of medical devices, and in particular, to a low-invasive lumbar puncture needle. The lumbar puncture needle of the present application includes a puncture needle tube and a puncture needle core, the puncture needle tube includes a needle tube body and a needle tube seat, and the puncture needle core includes a needle core body and a needle core seat; the head of the needle core body is cone-shaped, and the head of the needle tube body The head of the needle core body is completely exposed to the needle tube body when the puncture needle core is fully inserted into the puncture needle tube. The low-invasive lumbar puncture needle of the present application first penetrates sharply and then bluntly spreads the punctured tissue, which can not only reduce the area of the dura left crack after the lumbar puncture needle is taken out, but also preserve the dural tissue fiber itself to the greatest extent. Contracture characteristics, accelerate the process of fissure closure, and ultimately achieve the purpose of reducing complications of lumbar puncture.

Description

A low-invasive lumbar puncture needle

technical field

The present application relates to the technical field of medical devices, in particular, to a low-invasive lumbar puncture needle.

Background technique

Lumbar puncture is a widely used operation in clinical work, and post-lumbar puncture headache (also known as low intracranial pressure headache) is a common complication after lumbar puncture, and its incidence is about 20%-30%. Increased cerebrospinal fluid leakage due to lumbar puncture needle injury to the dura mater is a major cause of post-lumbar puncture headaches. Headache after lumbar puncture not only affects the quality of life of patients, but also increases the cost of additional treatment, and even has the risk of secondary central nervous system infection.

The disposable lumbar puncture needle (ie traumatic lumbar puncture needle) that is widely used in my country has an oblique section at the tip of the needle, and the opening of the needle for cerebrospinal fluid drainage or drug injection is on the oblique section, and the oblique section forms a sharp cut with the side of the needle tube. When the needle is inserted, this edge sharply cuts the dura mater tissue fibers, irreversibly destroying the integrity of the dura mater. After the puncture needle is taken out, there may be cracks with uneven edges on the dura mater, resulting in abnormal extravasation of cerebrospinal fluid. Independent risk factors for pressure headaches. Furthermore, CSF extravasation can cause complications such as wound infection, edema, and delayed healing.

In addition, the existing disposable lumbar puncture needles have sharp needle tips, low resistance during needle insertion, and can quickly cut various layers of tissue such as the skin, ligaments, and dura mater, and it is difficult for doctors to feel the breakthrough when the needle tip reaches the dura mater. , which is not conducive to the evaluation of lumbar puncture needle puncture levels, resulting in puncture failure, the increase of puncture times, the waste of medical resources, and the more painful experience of patients.

In view of this, this application is hereby made.

Utility model content

The purpose of the invention of the present application is to provide a low-invasive lumbar puncture needle.

In order to realize the invention purpose of the present application, the technical solution of the present application is:

The present application provides a low-invasive lumbar puncture needle, the low-invasive lumbar puncture needle includes a puncture needle tube and a puncture needle core, the puncture needle tube includes a needle tube body and a needle tube seat, and the puncture needle core includes a needle core body and a needle a core seat; the tail of the needle tube body is fixedly connected to the needle tube seat, the tail of the needle core body is fixedly connected to the needle core seat, and the puncture needle core is inserted into the puncture needle tube;

The head of the needle core body is in the shape of a cone, and the head of the needle tube body is in the shape of a hollow truncated cone. When the puncture needle core is fully inserted into the puncture needle tube, all the heads of the needle core body are in the shape of a hollow truncated cone. exposed to the needle body.

Optionally, when the puncture needle core is completely inserted into the puncture needle tube, the bottom edge of the cone of the head of the needle core body is engaged with the upper bottom edge of the circular frustum of the head of the needle tube body.

Optionally, the body of the needle body is in the shape of a hollow circular tube.

Optionally, the head of the needle body and the body of the needle body are smoothly connected.

Optionally, the inner and outer surfaces of the needle body are smooth surfaces.

Optionally, the puncture needle core is a solid tubular shape with a smooth exterior.

Optionally, the included angle between the generatrix of the cone and the bottom surface is a, and the included angle between the generatrix of the truncated cone and the lower bottom surface is b, and b=a.

Optionally, 30≤a≤60.

Optionally, 30≤b≤60.

This application has at least the following beneficial effects:

The present application proposes a low-invasive lumbar puncture needle characterized by penetrating the puncture tissue first and then bluntly opening the punctured tissue. To a certain extent, the contracture properties of the fibers of the dura mater can be preserved, and the process of fissure closure can be accelerated, and finally the purpose of reducing the complications of lumbar puncture can be achieved. The lumbar puncture needle of the present application balances the blunt and sharp characteristics of the puncture needle, and reduces the occurrence of puncture complications on the basis of ensuring the successful puncture.

The lumbar puncture needle of the present application is composed of a puncture needle core and a puncture needle tube, and has a simple structure and is easy to manufacture.

Compared with the lumbar puncture needle commonly used in clinical practice, the lumbar puncture needle of the present application has similar appearance and similar usage method, which is convenient for clinicians to use.

Description of drawings

1 is a schematic structural diagram of a puncture needle tube in a specific embodiment of a low-invasive lumbar puncture needle according to an embodiment of the application;

Fig. 2 is the partial enlarged schematic diagram of Fig. 1;

3 is a schematic structural diagram of the puncture needle core in the specific implementation of the low-invasive lumbar puncture needle according to the embodiment of the present application;

Fig. 4 is the partial enlarged schematic diagram of Fig. 3;

5 is a schematic structural diagram of the puncture needle core when the puncture needle core is fully inserted into the puncture needle tube in the specific implementation of the low-invasive lumbar puncture needle according to the embodiment of the application;

Fig. 6 is the partial enlarged schematic diagram of Fig. 5;

7 is a schematic structural diagram of the puncture needle core when the puncture needle core is half inserted into the puncture needle tube in the specific implementation of the low-invasive lumbar puncture needle according to the embodiment of the application;

FIG. 8 is a schematic diagram of the included angle a and the included angle b in the specific implementation of the low-invasive lumbar puncture needle according to the embodiment of the present application.

The reference numbers involved in the drawings are as follows:

1- puncture needle;

11- needle body;

12-Needle tube holder;

2-Puncture needle core;

21-needle core body;

22-pin holder.

The present application will be further described below with reference to specific embodiments. It should be understood that these examples are only used to illustrate the present application and not to limit the scope of the present application.

Detailed ways

The embodiments of the present application provide a low-invasive lumbar puncture needle, which includes a puncture needle tube and a puncture needle core. Specifically, the schematic structural diagram of the puncture needle tube is shown in FIG. 1 . From FIG. 1 , the puncture needle tube 1 includes a needle tube body 11 and a needle tube seat 12 , and the tail of the needle tube body 11 is fixedly connected to the needle tube seat 12 . A partially enlarged schematic diagram of the puncture needle tube is shown in FIG. 2 , and it can be seen from FIG. 2 that the head of the needle tube body 11 is in the shape of a hollow truncated cone. A schematic diagram of the structure of the puncture needle core is shown in FIG. 3 . It can be seen from FIG. 3 that the puncture needle core 2 includes a needle core body 21 and a needle core seat 22 . A partial enlarged schematic view of the puncture needle core is shown in FIG. 4 , and it can be seen from FIG. 4 that the head of the needle core body 21 is in the shape of a cone. Fig. 5 and Fig. 7 are schematic diagrams of cooperation between the puncture needle tube and the puncture needle core, wherein Fig. 5 is a schematic structural diagram when the puncture needle core is fully inserted into the puncture needle tube, and Fig. 7 is a structural schematic diagram when the puncture needle core is half inserted into the puncture needle tube. The partially enlarged schematic diagram of FIG. 5 is shown in FIG. 6 . It can be seen from FIG. 6 that the head of the needle core body 21 is completely exposed to the needle tube body 11 .

The head of the low-invasive lumbar puncture needle according to the embodiment of the present application has a structure similar to the head of a pencil. Only the top of the lumbar puncture needle in the embodiment of the present application has a conical top, forming a relatively sharp top to ensure smooth penetration into the skin, subcutaneous tissue, ligaments and other puncture tissues. The puncture tissue is opened to reduce the sharp incision caused by the puncture of each layer of tissue, thereby reducing the complications of lumbar puncture.

Optionally, when the puncture needle core is completely inserted into the puncture needle tube, the bottom edge of the cone is engaged with the upper bottom edge of the circular frustum.

Optionally, the body of the needle body is a hollow circular tube, which is used for draining cerebrospinal fluid or injecting drugs.

Optionally, the head of the needle tube body and the body part of the needle tube body are smoothly connected, so as to further reduce the sharp incision wound when puncturing each layer of tissue.

Optionally, the inner and outer surfaces of the needle tube body are both smooth surfaces, and the smooth inner surface can reduce friction with the outer surface of the puncture needle core and facilitate the needle insertion operation.

Optionally, the puncture needle core is a solid tubular shape with a smooth outer surface, and the smooth outer surface can reduce the friction between the inner surface of the needle tube and the inner surface of the needle tube, which can be used for operation.

Optionally, the included angle between the generatrix of the cone and the bottom surface is a, the included angle between the generatrix of the cone and the bottom surface is b, and b=a, and a schematic diagram of the specific structure is shown in FIG. 8 .

Optionally, 30≤a≤60, 30≤b≤60. If the angle is too large, the head of the lumbar puncture needle will be too sharp, which will cause low resistance when the needle is inserted; if the angle is too small, the head of the lumbar puncture needle will be too blunt, which will cause the resistance to be too large when the needle is inserted. Easy to operate.

Specifically, the use process and method of the low-invasive lumbar puncture needle in the embodiment of the present application are as follows:

When using, firstly, the patient lies on the side of the hard bed, the spine is as close to the bedside as possible, the back and the bed surface are vertical, the head and neck are flexed forward and the chest is flexed, the hands are hugging the knees close to the abdomen, the lumbar kyphosis is made as much as possible, and the intervertebral space is enlarged to facilitate the advancement of the lumbar spine. Needle; then locate the puncture point; when the positioning is completed, use iodophor on the puncture point to disinfect the skin from the inside to the outside, and the diameter of the disinfection range is about 15cm. Untie the puncture bag, the operator wears sterile gloves, checks the instruments in the puncture bag, pays attention to whether the puncture needle is unobstructed, and lays a sterile towel; then the puncture site is locally anesthetized.

Puncture: The surgeon tightens and fixes the skin at the puncture site with the thumb and index finger of the left hand to avoid displacement of the puncture point. The right hand holds the low-invasive lumbar puncture needle perpendicular to the dorsal plane. Check whether the needle is inserted in the correct direction, which is the key to a successful puncture. The needle is slightly inclined towards the head and pierces slowly. When the head of the lumbar puncture needle passes through the ligament, there is a certain sense of resistance. When the resistance suddenly decreases, it indicates that the lumbar puncture needle has passed through the dura and entered the subarachnoid space. The core of the puncture needle was slowly pulled out, and the cerebrospinal fluid was seen to flow out.

When the puncture is over, insert the puncture needle core into the puncture needle tube, and pull out the low-invasive lumbar puncture needle; press locally for 1-2 minutes, sterilize the puncture point, cover it with sterile gauze, and fix it with tape.

Although the present application is disclosed above with preferred embodiments, it is not used to limit the claims. Any person skilled in the art can make some possible changes and modifications without departing from the concept of the present application. The scope of protection shall be subject to the scope defined by the claims of this application.

Claims (9)

1. A low-wound lumbar puncture needle comprises a puncture needle tube and a puncture needle core, wherein the puncture needle tube comprises a needle tube body and a needle tube seat, and the puncture needle core comprises a needle core body and a needle core seat; the tail part of the needle tube body is fixedly connected with the needle tube seat, the tail part of the needle core body is fixedly connected with the needle core seat, and the puncture needle core is inserted into the puncture needle tube; it is characterized in that the preparation method is characterized in that,

the head of the needle core body is in a conical shape, the head of the needle tube body is in a hollow circular truncated cone shape, and when the puncture needle core is fully inserted into the puncture needle tube, the head of the needle core body is completely exposed out of the needle tube body.

2. The low-trauma lumbar puncture needle according to claim 1, wherein when the puncture needle core is fully inserted into the puncture needle tube, the bottom edge of the cone of the head of the needle core body is engaged with the upper bottom edge of the circular truncated cone of the head of the needle tube body.

3. The low-trauma lumbar puncture needle according to claim 1, wherein the body of the needle body is hollow and tubular.

4. The low-trauma lumbar puncture needle of claim 1, wherein the head of the needle body is smoothly connected with the body of the needle body.

5. The low-trauma lumbar puncture needle of claim 1 wherein the inner and outer surfaces of the needle body are smooth surfaces.

6. The low-trauma lumbar puncture needle of claim 1, wherein the puncture needle core is in the shape of a smooth solid tube.

7. The low-trauma lumbar puncture needle according to claim 1, wherein the included angle between the generatrix of the cone and the bottom surface is a, the included angle between the generatrix of the circular truncated cone and the lower bottom surface is b, and b ═ a.

8. The low-trauma lumbar puncture needle according to claim 7, wherein a is 30 to 60.

9. The low-trauma lumbar puncture needle according to claim 7, wherein b is 30 to 60.

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