CN209661744U - A new type of lumbar puncture needle - Google Patents

Abstract

The utility model discloses a kind of lumbar puncture needles, including needle tubing, survey pressure branch pipe, drainage branch pipe, needle stand, lining core, lining core seat and pressure gauge.It surveys pressure branch pipe and drainage branch pipe is connected to needle tubing, lining core front end is circular cone, boss structure, lining core diameter is slightly less than boss diameter, the interference fit that lining core passes through the circular cone of front end, boss structure and needle interior wall, not only it had been able to achieve puncture, surveyed the consistent operation of pressure, drainage, but also be adjustable the flow velocity and flow surveyed pressure branch pipe and drain cerebrospinal fluid in branch pipe.Compared with prior art, the utility model has the characteristics that easy to operate, structure is simple and is able to achieve flow velocity adjusting, cross-infection risk can be effectively reduced.

Description

A new type of lumbar puncture needle

technical field

The utility model belongs to the field of medical instruments, in particular to a novel lumbar puncture needle.

Background technique

Lumbar puncture is one of the commonly used clinical examination methods in neurology. It is of great value in the diagnosis and treatment of nervous system diseases. It is often used in the diagnosis of central nervous system inflammatory diseases, subarachnoid hemorrhage and meningeal cancer. Intracranial pressure measurement and intraspinal injection of drugs. The main instrument used for lumbar puncture is the lumbar puncture needle. When performing lumbar puncture, the puncture needle slowly enters along the spinous process. When the needle is inserted about 4-6cm in adults (about 3-4cm in children), the dura mater can be pierced to the subarachnoid space. At this time, the lining core is pulled out and the cerebrospinal fluid Flow out from the needle tube, connect the pressure gauge at the end of the needle seat to measure the pressure, remove the pressure gauge after the pressure measurement, and take a sample of the cerebrospinal fluid, insert the liner into the needle tube after the sampling, and finally pull out the puncture needle to complete the puncture operation .

The lumbar puncture needle commonly used clinically is mainly composed of a needle tube, a needle seat, a lining core and a lining core seat. When performing pressure measurement and sampling operations, it is usually necessary to pull out the liner from the needle tube and then connect it to the pressure gauge. After the pressure measurement is completed, the pressure gauge needs to be removed before sampling. After the sampling is completed, the liner needs to be inserted back into the needle tube. . According to the usage situation, there are three deficiencies in the currently commonly used lumbar puncture needles: the one is inconvenient to operate. For medical workers, an operation process needs to pull out the lining core, insert the lining core, connect the pressure gauge, and disassemble the pressure gauge. The steps are cumbersome and the operation is very inconvenient. Second, it is difficult to adjust the flow rate. When performing puncture on patients with high intracranial pressure, the flow rate of cerebrospinal fluid needs to be adjusted in order to prevent the induction of cerebral herniation. Currently, it is difficult to adjust the flow rate with the commonly used lumbar puncture needles. Although some improved lumbar puncture needles can adjust the flow rate by adding an adjustment valve, However, the structure of the lumbar puncture needle is too complicated and the practicability is poor; the third is that there is a risk of cross-infection. Before the puncture operation is completed, the pulled out liner needs to be reinserted into the needle tube, which is easy to bring external bacteria into the spinal canal to cause cross infection, and there is a big safety hazard in use.

Utility model content

The technical problem to be solved by the utility model is to provide a novel lumbar puncture needle. The lumbar puncture needle can solve the problems of currently commonly used lumbar puncture needles such as inconvenient operation, difficulty in adjusting the flow rate, and the risk of cross-infection, and can be widely used in lumbar puncture.

The technical scheme adopted by the utility model to solve the deficiencies in the use process of the current commonly used lumbar puncture needles is:

A new type of lumbar puncture needle, including a needle tube, a pressure measuring branch tube, a drainage branch tube, a needle seat, a lining core, a lining core seat and a pressure measuring gauge; wherein, both the pressure measuring branch tube and the drainage branch tube are connected with the needle tube; the lining core is arranged in the needle tube And it has an interference fit with the inner wall of the needle tube.

In the aforementioned novel lumbar puncture needle, the pressure-measuring branch tube and the drainage branch tube are connected to the needle tube in the form of a three-way structure, and the included angles between the pressure-measuring branch tube, the drainage branch tube and the needle tube are both 90°.

In the aforementioned novel lumbar puncture needle, the pressure-measuring branch tube and the drainage branch tube are arranged at 180° to each other, and the distance along the direction of the needle tube is 8-10 mm.

In the aforementioned novel lumbar puncture needle, the pressure measuring branch tube communicates with the pressure measuring gauge through a transparent tube.

In the new lumbar puncture needle mentioned above, the front end of the liner has a structure of a cone combined with a boss, the diameter of the liner is smaller than the diameter of the boss, and the liner has an interference fit with the inner wall of the needle tube through the cone and boss structure at the front end.

A novel lumbar puncture needle comprises a needle tube, a pressure measuring branch tube, a drainage branch tube, a needle seat, a lining core, a lining core seat and a pressure measuring gauge.

Wherein, both the pressure measuring branch pipe and the drainage branch pipe are connected with the needle tube.

Preferably, both the pressure measuring branch pipe and the drainage branch pipe are connected with the needle tube in the form of a three-way structure, and the included angles between the pressure measuring branch pipe, the drainage branch pipe and the needle tube are both 90°; the pressure measuring branch pipe and the drainage branch pipe are mutually formed. Arranged at 180°, and the distance along the direction of the needle tube is 10mm.

Preferably, the pressure measuring branch pipe communicates with the pressure measuring gauge through a transparent tube.

The front end of the liner is a conical structure combined with a boss. The diameter of the liner is slightly smaller than the diameter of the boss. Through the interference fit between the cone and the boss structure at the front end of the liner and the inner wall of the needle tube, the coherent operation of puncture, pressure measurement and drainage can be realized. , and can adjust the flow rate and flow rate of cerebrospinal fluid in the manometric arm and drainage arm.

The utility model has the following characteristics:

(1) Easy to operate. In the process of lumbar puncture, only need to adjust the position of the liner in the needle tube to realize the pressure measurement and drainage operation. It is not necessary to pull out the liner completely from the needle tube or connect or disassemble the pressure gauge, and the operation is more convenient.

(2) The structure is simple and the flow rate can be adjusted. During the operation, when the front taper of the liner is matched with the pressure measuring branch and the drainage branch, the matching gap between the front taper of the liner and the pressure measuring branch and the drainage branch can be adjusted by fine-tuning the position of the liner, so as to realize the control of the flow rate of the cerebrospinal fluid. The adjustment of the flow rate is realized with a simple structure, and the complexity of the structure of the puncture needle is avoided.

(3) It can effectively reduce the risk of cross-infection. During the whole puncture process, the liner only moves in the needle tube, and the puncture operation can be completed without taking the liner completely out of the needle tube, which avoids the possibility of cross-infection and effectively reduces the risk of cross-infection.

Description of drawings

Figure 1 is a structural schematic diagram of a novel lumbar puncture needle.

In the figure, 1, needle tube, 2, cone, 3, drainage branch pipe, 4, needle seat, 5, lining core, 6, lining core seat, 7, pressure measuring branch pipe, 8, transparent tube, 9, pressure measuring gauge, 10 , Boss.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

Figure 1 is a schematic diagram of the structure of a new type of lumbar puncture needle. Referring to Figure 1, a new type of lumbar puncture needle includes a needle tube 1, a pressure measuring branch tube 7, a drainage branch tube 3, a needle seat 4, a lining core 5, and a lining core seat 6 , transparent tube 8 and pressure gauge 9. The front end of the liner has a cone 2 and a boss 10 structure, the diameter of the liner 5 is slightly smaller than the diameter of the boss, and the structure of the cone 2 and the boss 10 at the front end of the liner is an interference fit with the inner wall of the needle tube 1. Both the pressure measuring branch pipe 7 and the drainage branch pipe 3 communicate with the needle tube 1 through a three-way structure, and the included angles between the pressure measuring branch pipe 7 and the drainage branch pipe 3 and the needle tube 1 are both 90°. The pressure measuring branch tube 7 and the drainage branch tube 3 are arranged at 180° to each other, and the distance along the direction of the needle tube 1 is 10mm. The pressure measuring branch pipe 7 communicates with the pressure measuring gauge 9 through the transparent tube 8 .

Method of use: before lumbar puncture, insert the liner 5 into the needle tube 1 to enhance the rigidity of the needle tube 1 and prevent the needle tube from being too curved during the puncture, which is not conducive to the smooth progress of the puncture. When the needle tube 1 enters slowly along the spinous process, pierces the dura mater and reaches the subarachnoid space, slowly withdraw the liner 5 outward, and when the front end cone 2 of the liner and the structure of the boss 10 cooperate with the outlet of the pressure measuring branch tube 7, keep The position of the liner core 5 remains unchanged, and the cerebrospinal fluid enters the pressure measuring branch tube 7 and the transparent tube 8 through the needle tube 1 and then enters the pressure measuring gauge 9 to realize pressure measurement. During this process, the operator can observe the flow of cerebrospinal fluid through the transparent tube 8 . When the pressure measurement is finished and the cerebrospinal fluid is sampled, continue to slowly extract the lining core 5 outward. When the front cone 2 and the boss 10 of the lining core 5 cooperate with the outlet of the drainage branch tube 3, the cerebrospinal fluid enters the drainage branch tube 3 through the needle tube 1 for sampling of cerebrospinal fluid. At the same time, the remaining cerebrospinal fluid in the manometry branch 7 will also enter the drainage branch 3 through the needle tube 1, so that the extracted cerebrospinal fluid can be fully utilized, avoiding the contradiction that the cerebrospinal fluid used for pressure measurement after the conventional lumbar puncture needle can not be used. After the sampling is finished, insert the lining core 5 along the needle tube 1 to the end and take out the puncture needle to complete the lumbar puncture operation.

During the pressure measurement process, the cerebrospinal fluid can only flow along the needle tube 1 to the pressure measurement branch tube 7 due to the interference fit between the boss 10 with the liner and the needle tube 1 to realize the sealing function. The operator can observe the flow of cerebrospinal fluid through the transparent tube 8, fine-tune the position of the liner 5 forward and backward according to the flow velocity, and change the matching gap between the front taper surface of the liner 5 and the outlet of the pressure measuring branch tube 7, so as to realize the adjustment of the flow rate of the cerebrospinal fluid during the pressure measurement process .

During the sampling process of cerebrospinal fluid, due to the interference fit between the boss 10 with the liner 5 and the needle tube to realize the sealing function, and the pressure measuring branch tube 7 connected with the pressure gauge 9 is a closed structure, the cerebrospinal fluid can only flow along the needle tube 1 to the drainage branch tube 3 . According to the cerebrospinal fluid pressure, the operator can fine-tune the position of the lining core 5 back and forth, and change the matching gap between the front taper surface of the lining core 5 and the outlet of the drainage branch tube 3, so as to realize the adjustment of the flow rate of the cerebrospinal fluid during the sampling process and prevent the flow rate of the cerebrospinal fluid from being too large during the sampling process. causing a brain herniation attack in the patient.

The above is only a specific embodiment of the utility model, but the design concept of the utility model is not limited thereto, and any insubstantial improvement of the utility model by using this concept should be an act of violating the protection scope of the utility model.

Claims (5)

1. a kind of lumbar puncture needle, which is characterized in that including needle tubing, survey pressure branch pipe, drainage branch pipe, needle stand, lining core, lining core Seat and pressure gauge；Wherein, it surveys pressure branch pipe and drainage branch pipe is connected to needle tubing；Lining core be arranged in needle tubing and with needle interior wall mistake It is full of cooperation.

2. lumbar puncture needle according to claim 1, which is characterized in that survey pressure branch pipe and drainage branch pipe with Three-port structure form is connected to needle tubing, and surveying pressure branch pipe and draining branch pipe and the angle of needle tubing is 90 °.

3. lumbar puncture needle according to claim 1, which is characterized in that the survey pressure branch pipe and drainage branch pipe are mutually 180 ° of arrangements, and be 8-10mm along needle tubing direction distance.

4. lumbar puncture needle according to claim 1, which is characterized in that the survey pressure branch pipe is by transparent pipe and surveys Press table connection.

5. lumbar puncture needle according to claim 1, which is characterized in that lining core front end is the knot of circular cone combination boss Structure, lining core diameter are less than boss diameter, the interference fit that lining core passes through the circular cone of front end, boss structure and needle interior wall.