CN206526088U - A kind of lumbar puncture device - Google Patents

Abstract

A lumbar puncture device, relating to medical equipment, solves the technical problems that the existing lumbar puncture needles are difficult to fix the position of the puncture needle and control the flow rate of the liquid during the operation process, easily lead to infection, brain hernia complications, complex structure, and cumbersome operation. The utility model comprises a hollow puncture needle, a needle core and a needle seat, the needle core cooperates with the inner cavity of the hollow puncture needle, and the hollow puncture needle is connected with the needle seat, wherein: the outer wall of the hollow puncture needle is provided with an external thread near the needle tail, The outside of the hollow puncture needle is provided with an adjustable fixing element, the needle tail of the hollow puncture needle is fixed to the needle holder; the adjustable fixing element is composed of an annular disk and a rotating sleeve; the needle holder is a transparent three Interface needle seat; the needle core is composed of a tapered tip, a cylindrical core rod and a core tail handle, and the cylindrical core rod can be inserted into the needle body and the needle tail inner cavity of the hollow puncture needle. The utility model has the advantages of simple structure, convenient operation and safe puncturing.

Description

A lumbar puncture device

technical field

The utility model belongs to the technical field of medical instruments, in particular to a lumbar puncture device improved on a lumbar puncture needle.

Background technique

Lumbar puncture is one of the commonly used clinical techniques, mainly used for the diagnosis and treatment of central nervous system diseases, such as: measuring the pressure of cerebrospinal fluid, extracting an appropriate amount of cerebrospinal fluid for cell, biochemical and bacteriological testing, and releasing cerebrospinal fluid appropriately to reduce intracranial pressure. Pressure, inject drugs into the subarachnoid space for treatment, or perform cerebrospinal fluid contrast examination, etc.

The lumbar puncture needle commonly used clinically at present is made of metal, including: a hollow puncture needle, a needle core and a needle seat, the needle core cooperates with the inner cavity of the hollow puncture needle, and the hollow puncture needle is connected with the needle seat. Before the puncture, insert the needle core into the cavity of the hollow puncture needle. After the needle passes through the ligament and dura mater, slowly withdraw the needle core to observe whether there is cerebrospinal fluid outflow, and then perform pressure measurement, discharge and other operations, and then bandage and fix it. This traditional lumbar puncture needle has many disadvantages in the actual operation process: 1. When pulling out the needle core to observe whether there is cerebrospinal fluid outflow, it can be seen after all the needle core is pulled out, and the outflow speed of cerebrospinal fluid cannot be adjusted in time. When the cerebrospinal fluid pressure is high, the outflow of cerebrospinal fluid is large, which will affect the accuracy of cerebrospinal fluid pressure measurement and easily lead to some complications. When predicting the pressure measurement after the outflow, the operator needs to fix the puncture needle with one hand, take out the pressure measurement tube with the other hand and quickly connect it to the needle seat. During this process, cerebrospinal fluid will often be lost, and the position of the needle is easy to change when fixed with one hand, which will affect the One-step operation may cause secondary injury; 3. During the whole operation process, it is necessary to continuously insert and pull out the needle core, connect the pressure measuring tube many times, etc., the operation is more complicated and cumbersome, and it is easy to cause complications such as brain herniation and infection.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings of the prior art, provide a lumbar puncture device, solve the problem that the existing lumbar puncture needle is difficult to fix the position of the puncture needle and control the flow rate of the liquid during the operation process, which is easy to cause infection and brain hernia complications. Complicated and cumbersome technical issues.

The utility model is achieved through the following technical solutions:

A lumbar puncture device, comprising: a hollow puncture needle, a needle core and a needle seat, the needle core cooperates with the inner cavity of the hollow puncture needle, and the hollow puncture needle is connected with the needle seat, wherein:

The inner cavity of the hollow puncture needle is tapered near the needle tip, the inner cavity of the needle body and the needle tail is cylindrical, the outer wall of the hollow puncture needle is provided with an external thread near the needle tail, and the external setting of the hollow puncture needle can be adjusted A fixing element, the needle tail of the hollow puncture needle is fixed to the needle seat;

The adjustable fixing element is composed of an annular disk and a rotating sleeve, one end of the rotating sleeve is fixed vertically to the annular disk, and the inner wall of the other end of the rotating sleeve is provided with an internal thread engaged with the external thread;

The needle base is a transparent three-port needle base, which is composed of a connection port fixed to the hollow puncture needle, a central interface opposite to the connection port, and two upper and lower side interfaces perpendicular to the central interface. 1. The inner cavity of the side interface is connected, the side interface has a cover, and the circular hole in the inner cavity of the central interface is slidably matched with the needle core;

The needle core is composed of a tapered tip, a cylindrical core rod and a core tail handle, the tapered tip is matched with the taper at the inner cavity of the hollow puncture needle near the needle tip, and the cylindrical core rod can be inserted into the The needle body and the inner cavity of the needle tail of the hollow puncture needle are slidably matched with the circular hole in the inner cavity of the central interface.

Compared with the prior art, the utility model adopts a puncture needle of a specific shape and a matching needle core, so it is not necessary to pull out all the needle cores through the central interface when observing whether there is cerebrospinal fluid flowing out, and only needs to touch the tip of the puncture needle When the needle core part is separated, the cerebrospinal fluid can flow out; due to the use of the three-port needle base made of transparent material, it can be observed in time to judge whether the puncture needle enters the designated position, and the pulled out part of the needle core can be reinserted in time to reduce the cerebrospinal fluid flow. The loss during the process; because before connecting the pressure measuring tube, the operator adjusts the adjustable fixing element to the top with one hand, so that the annular disc fits the patient's skin, and takes out and connects the pressure measuring tube with the other hand, which can reduce the loss caused by the operator's single hand. The position of the puncture needle caused by supporting and fixing the puncture needle changes; since there is no need to withdraw or insert the needle core multiple times during the whole process, and the outflow and flow rate of the cerebrospinal fluid can be adjusted by controlling the needle core position, preventing complications such as infection and cerebral hernia.

The utility model is used for diagnosing and treating diseases of the central nervous system, and can improve complicated operation, difficulty in fixation, and loss of cerebrospinal fluid. The utility model has the advantages of simple structure, convenient operation and safe puncture.

Description of drawings

Fig. 1 is the internal structure schematic diagram of the present utility model;

Fig. 2 is a structural schematic diagram of a hollow puncture needle of the present invention;

Fig. 3 is a structural schematic diagram of the adjustable fixing element of the present invention;

Fig. 4 is a schematic diagram of the needle seat structure of the present utility model;

Fig. 5 is a schematic diagram of the needle core structure of the present invention.

detailed description

The technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 to 5, a lumbar puncture device includes: a hollow puncture needle 1, a needle core 4 and a needle seat 3, the needle core 4 cooperates with the inner cavity of the hollow puncture needle 1, and the hollow puncture needle 1 and the needle seat 3 connections, where:

The inner cavity 1-2 of the hollow puncture needle 1 is tapered near the needle tip, the inner cavity 1-3 of the needle body and the needle tail is cylindrical, and the outer wall of the hollow puncture needle 1 is provided with an external thread 1-1 near the needle tail. , the outside of the hollow puncture needle 1 is provided with an adjustable fixing element 2, and the needle tail of the hollow puncture needle 1 is fixed to the needle seat 3;

The adjustable fixed element 2 is composed of an annular disc 2-1 and a rotary sleeve 2-2, one end of the rotary sleeve 2-2 is vertically fixed to the annular disc 2-1, and the other end of the rotary sleeve 2-2 is The inner wall at one end is provided with an internal thread 2-2-1 engaged with the external thread 1-1 to realize the fixation and position adjustment of the adjustable fixing element 2 and the hollow puncture needle 1;

The needle base 3 is a transparent three-interface needle base, which consists of a connection port 3-1 fixed to the hollow puncture needle 1, a central interface 3-2 opposite to the connection port 3-1, and a vertically arranged central interface 3-2. Composed of two upper and lower side interfaces 3-3, the inner cavity of the connection port 3-1, the central interface 3-2, and the side interface 3-3 are connected, and the side interface 3-3 has a cover 3-3-1, The inner cavity circular hole 3-2-1 of the central interface 3-2 is slidingly fitted with the needle core 4;

The needle core 4 is composed of a conical tip 4-1, a cylindrical core rod 4-2 and a core tail handle 4-3, the conical tip 4-1 is close to the inner cavity of the hollow puncture needle 1 1-2, the cylindrical mandrel 4-2 can be inserted into the needle body and the needle tail inner cavity 1-3 of the hollow puncture needle, and is circular with the inner cavity of the central interface 3-2. The hole 3-2-1 is slidingly fitted, and by controlling the relative position of the needle core and the needle seat, the purpose of controlling the outflow and flow rate of the cerebrospinal fluid is achieved.

Working process and principle of the present utility model:

As shown in Figures 1 to 5, when in use, the operator first inserts the needle core 4 into the hollow puncture needle 1 through the inner cavity circular hole 3-2-1 of the central interface 3-2 of the needle holder 3, and then performs the puncture After the needle tip passes through the ligament and dura mater, the needle core 4 is slowly drawn out until the tapered tip 4-1 leaves the hollow puncture needle 1 inside the tapered cavity near the needle tip 1-2, and the cerebrospinal fluid flows around the needle core 4 To the needle seat 3, observe whether there is cerebrospinal fluid. If the cerebrospinal fluid fills the needle seat 3 quickly, insert the needle core 4 a little bit to slow down the flow rate and prevent brain herniation. At the same time, because no cerebrospinal fluid flows out during this process, the cerebrospinal fluid flow is reduced. Pressure measurement error.

When it is observed that cerebrospinal fluid fills the needle seat 3, insert the needle core 4 back into the hollow puncture needle 1, rotate the adjustable fixing element 2, make the ring disc 2-1 at the top close to the patient's skin, and press the ring disc with one hand. 2-1, take off the cover 3-3-1 on the interface 3-3 on either side of the needle seat 3 with the other hand, and connect the fixed pressure measuring tube, and slowly pull out the needle core 4 to a certain length to measure the pressure of the cerebrospinal fluid .

After the pressure measurement is completed, insert the extracted part of the needle core 4 back into the hollow puncture needle 1, remove the pressure measurement tube, and pour the cerebrospinal fluid of the pressure measurement tube into the cerebrospinal fluid collection test tube to reduce the loss of cerebrospinal fluid. Since the needle core 4 has been inserted back, no cerebrospinal fluid continues to flow out during this process. After collecting the cerebrospinal fluid from the pressure measuring tube, connect the cerebrospinal fluid collection test tube to the side port 3-3, properly withdraw the needle core 4, and keep the cerebrospinal fluid for inspection.

The pressure measurement can repeat the above process again. If liquid medicine needs to be injected, it can be injected through the port on the other side to reduce the risk of infection.

The utility model can be implemented in various forms without departing from the spirit or essence of the invention, so it should be understood that the above-mentioned embodiments are not limited to the foregoing details, but should be interpreted broadly within the scope defined by the claims, and therefore fall into the scope of the claims. Changes and modifications within the equivalent range thereof shall be covered by the claims.

Claims (1)

1. A lumbar puncture device, comprising: a hollow puncture needle (1), a needle core (4) and a needle seat (3), the needle core (4) cooperates with the inner chamber of the hollow puncture needle (1), and the hollow puncture needle ( 1) connected with the needle base (3), characterized in that: The inner cavity of the hollow puncture needle (1) is tapered near the needle tip (1-2), the inner cavity of the needle body and the needle tail (1-3) is cylindrical, and the outer wall of the hollow puncture needle (1) is close to the needle tail An external thread (1-1) is provided at the center, an adjustable fixing element (2) is arranged on the outside of the hollow puncture needle (1), and the needle tail of the hollow puncture needle (1) is fixed to the needle seat (3); The adjustable fixed element (2) is composed of an annular disc (2-1) and a rotating sleeve (2-2), and one end of the rotating sleeve (2-2) is perpendicular to the annular disc (2-1) The inner wall at the other end of the fixed, rotating sleeve (2-2) is provided with an internal thread (2-2-1) engaged with the external thread (1-1); The needle base (3) is a transparent three-port needle base, which consists of a connection port (3-1) fixed to the hollow puncture needle (1), a central interface (3-2) opposite to the connection port (3-1) It is composed of two upper and lower side interfaces (3-3) vertically arranged with the central interface (3-2), and the connection port (3-1), the central interface (3-2), and the side interface (3-3) The inner cavity is connected, the side interface (3-3) has a cover (3-3-1), and the inner cavity circular hole (3-2-1) of the central interface (3-2) is connected with the needle core ( 4) sliding fit; The needle core (4) is composed of a conical tip (4-1), a cylindrical core rod (4-2) and a core tail handle (4-3), and the conical tip (4-1) is connected to the The taper of the inner chamber of the hollow puncture needle (1) near the needle tip (1-2) matches, and the cylindrical mandrel (4-2) can be inserted into the needle body and the inner cavity of the needle tail of the hollow puncture needle (1 -3), and slidingly fit with the circular hole (3-2-1) of the central interface (3-2).