CN211131294U - A lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes - Google Patents

Abstract

The utility model belongs to the field of medical appliances, in particular to a lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes, comprising a needle 1 , a needle cylinder 2 , a pushing part 3 and a guide wire 4 . The needle 1 is a hollow cavity, the needle 1 is provided with a scale 101, the pushing member 3 includes a push rod 301 and a piston 302, the piston 302 is arranged in the syringe 2, the needle 1 is connected with the front end of the syringe 2, and the front end of the syringe 2 is provided with Live cover 202 . The lumbar puncture needle disclosed by the utility model can collect cerebrospinal fluid under the condition of isolating air, is easy to operate, safe to use, can achieve the purpose of accurately measuring oxygen partial pressure and biochemical indexes, and has the function of drug injection.

Description

A lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes

technical field

The utility model belongs to the field of medical appliances, in particular to a lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes.

Background technique

Lumbar puncture is one of the commonly used operations in neurology. It is mainly used to extract cerebrospinal fluid to measure pressure, inject drugs into the subarachnoid space, perform cerebrospinal fluid angiography, and collect cerebrospinal fluid samples. In the lateral decubitus position, puncture is performed from the lumbar 2 to the sacral 1 (mainly lumbar 3-4) intervertebral space. After routine local disinfection and anesthesia, wear rubber gloves, and puncture the needle slowly along the spinous process direction and perpendicular to the back plane. When the needle tip encounters bone during needle insertion, the needle should be withdrawn to the subcutaneous surface and the angle should be corrected before puncturing. . When the needle is inserted about 4-6cm for adults (about 3-4cm for children), the dura can be penetrated to reach the subarachnoid space. ). After the operation, the lumbar puncture needle of the present invention is pulled out, covered with sterile gauze, and fixed with adhesive tape. The patient lies supine for 4-6 hours without the pillow, and then the collected cerebrospinal fluid is used to measure various biochemical indicators.

Cerebrospinal fluid oxygen partial pressure refers to the strength of physical dissolved oxygen in cerebrospinal fluid, which reflects the degree of brain hypoxia, and is also one of the important detection indexes of cerebrospinal fluid. However, there are many defects in the structural design of the currently used cerebrospinal fluid sampling device or collector: 1. The cerebrospinal fluid is exposed to the environment for a long time and is easily contaminated by foreign substances; At the same time, atmospheric pressure will press oxygen, carbon dioxide, etc. in the air into the cerebrospinal fluid, making the measurement of the partial pressure of oxygen in the cerebrospinal fluid inaccurate, causing doctors to draw erroneous diagnosis results, thereby affecting subsequent treatment. Therefore, the cerebrospinal fluid collected by the traditional lumbar puncture needle is not suitable for measuring the partial pressure of oxygen in the cerebrospinal fluid.

In addition, researchers have tried to improve the structure of the lumbar puncture needle, but there are still some other shortcomings:

For example, the invention patent "a lumbar puncture needle" (patent number CN201210568499.7) can be used to measure the pressure of cerebrospinal fluid and inject drugs. The device fixes the needle on the handle, and observes the cerebrospinal fluid through a transparent handle or an observation window at the position of the handle's cavity. Whether it flows out; after the needle enters the human body, the valve handle threaded rod rotates relative to the handle threaded through hole to achieve drainage and accurately control the outflow of cerebrospinal fluid. The device does not solve the following defects of traditional puncture needles: ① It is inconvenient to grasp the depth of insertion, and doctors usually collect cerebrospinal fluid by experience; ② There is no air isolation device, and a large amount of oxygen, carbon dioxide and other air components will be mixed to a large extent. This makes the measured oxygen partial pressure and other biochemical indicators related data have large errors; ③ The pressure measuring device is in direct contact with the cerebrospinal fluid, and repeated use will cause pollution and inaccurate measurement results.

The utility model patent "New Lumbar Puncture Needle" (Patent No. CN201220508634.4) can be used to measure the pressure of cerebrospinal fluid. The device includes a puncture needle tube and a needle seat located at the back end of the puncture needle tube. The scale on the puncture needle tube can accurately determine the puncture The device does not solve the following defects of the traditional puncture needle: ① lack of intuitive visibility to observe whether the cerebrospinal fluid flows out; ② there is no air isolation device, and a large amount of oxygen, carbon dioxide and other air components will be mixed to a large extent, making the There are large errors in the measured oxygen partial pressure and other relevant data of biochemical indicators; (3) the pressure measuring device is in direct contact with the cerebrospinal fluid, and repeated use will cause pollution and inaccurate measurement results; It can be used for the function of changing fluids or injecting drugs.

However, there is currently no lumbar puncture needle on the market that is specially used to collect cerebrospinal fluid and keep the collected cerebrospinal fluid in the initial state, so as to ensure the accuracy of the measurement results of various physiological and biochemical indicators, and it is difficult to meet the needs of medical treatment and the market. Therefore, an urgent need for a A new device to meet the above requirements.

Utility model content

The utility model provides a lumbar puncture needle that can solve the above problems, that is, the lumbar puncture needle involved in the utility model can directly observe whether the cerebrospinal fluid flows out, can accurately grasp the puncture depth, and can collect cerebrospinal fluid in a closed environment. The lumbar puncture needle is simple to operate and convenient to use, and is mainly used for collecting cerebrospinal fluid that is not polluted by air under the condition of ensuring safety, so that the collected cerebrospinal fluid maintains the initial state; it can also be used for drug injection.

The technical scheme for solving the technical problem of the present utility model is:

A lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes, comprising a needle head 1, a needle cylinder 2, a pushing part 3, and a guide wire 4; the needle head 1 is a hollow cavity, which is convenient for inserting and extracting the guide wire 4; the needle cylinder 2 Made of transparent material, the front end of the syringe 2 is provided with a joint 201, the joint 201 is connected with the needle 1, and the opening of the joint 201 can be matched with the liquid inlet of the oxygen partial pressure measuring instrument to prevent the leakage of cerebrospinal fluid and the entry of air; the pushing part 3 is arranged on the In the syringe 2, the pushing member 3 includes a push rod 301 and a piston 302, one end of the push rod 301 is connected with the piston 302, and one end of the push rod 301 is exposed at the rear end of the syringe 2, so as to isolate the air, reserve the liquid storage space, and facilitate the measurement. The effect of liquid outflow; before the puncture, the guide wire 4 passes through the pushing member 3 and penetrates the cavity of the needle 1, and the guide wire 4 is integrated with the pushing member 3 and the needle 1, so that the interior of the lumbar puncture needle is isolated from the air to ensure that the cerebrospinal fluid collected subsequently remains initial state.

Further, the syringe 2 is provided with a scale, which is convenient for measuring the amount of cerebrospinal fluid collected and the amount of administration.

Further, the inner diameter of the needle 1 is 0.184mm-1.283mm. Compared with the common lumbar puncture needle, the inner diameter of the needle 1 disclosed in the present invention is larger to avoid the sediment in the cerebrospinal fluid from blocking the needle.

Further, the outer diameter of the guide wire 4 is consistent with the inner diameter of the cavity of the needle 1 , which facilitates the extraction of the guide wire 4 while avoiding air contamination of the cerebrospinal fluid in the cavity of the needle 1 .

Further, the opening of the joint 201 is provided with a live cover 202, so that after the collection is completed, the joint 201 can be covered by the live cover 202 to isolate the cerebrospinal fluid inside the syringe 2 from the outside world, so as to prevent the external environment from measuring the cerebrospinal fluid biochemical indicators and oxygen partial pressure. impact on results.

Further, the joint 201 is matched with the liquid inlet of the oxygen partial pressure measuring instrument to prevent the leakage of cerebrospinal fluid and the entry of air, and further ensure the accuracy of cerebrospinal fluid biochemical indicators and oxygen partial pressure measurement results.

Further, the piston 302 is made of a hole stone material. When the cerebrospinal fluid enters the interior of the syringe 2 and contacts the piston 302, the micropores will be blocked by the cerebrospinal fluid, so that a closed space is formed inside the syringe 2 to ensure that the cerebrospinal fluid maintains its initial state.

Further, the needle 1 is detachably connected to the joint 201 provided at the front end of the syringe 2. After collecting the cerebrospinal fluid, the needle 1 can be removed from the joint 201, and the measuring device can be connected through the joint opening 2, which is convenient for the oxygen partial pressure and biochemistry of the cerebrospinal fluid. measurement of indicators.

Further, the needle 1 is provided with a scale 101, so that the medical staff can accurately grasp the puncture depth.

The medical staff can also replace the needle 1 with a common injection needle to perform drug injection.

The beneficial effects of the utility model: the lumbar puncture needle disclosed by the utility model, which can measure the oxygen partial pressure of cerebrospinal fluid and biochemical indexes, has a simple structure and is easy to operate. Under the circumstance, it is ensured that the collected cerebrospinal fluid maintains the initial state and is not polluted by the air; the device also has the function of injecting drugs.

Description of drawings

Fig. 1 is the front view of the utility model.

1- Needle, 2- Syringe, 202- Live Cap, 3- Push Part, 301- Push Rod, 302- Piston, 4- Guide Wire

FIG. 2 is a front view of the needle 1 of the present invention.

101-scale

Fig. 3 is the front view of the utility model after the operation.

201-joint, 202-live cap, 301-push rod, 302-piston

Detailed ways

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

Embodiment 1 A lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes

A lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes, comprising a needle head 1, a needle cylinder 2, a pushing part 3, and a guide wire 4; the needle head 1 is a hollow cavity, and a scale 101 is arranged on the needle head 1; The inner diameter is 0.184mm-1.283mm; the syringe barrel 2 is made of transparent material, the syringe barrel 2 is provided with a scale, the front end of the syringe barrel 2 is provided with a joint 201, the joint 201 is connected with the needle 1, and the opening of the joint 201 is inserted into the oxygen partial pressure measuring instrument. The liquid ports are matched; the joint 201 provided at the front end of the needle 1 and the barrel 2 is detachably connected, and a live cover 202 is provided at the opening of the joint 201 . The push member 3 is arranged in the syringe 2, and the push member 3 includes a push rod 301 and a piston 302. One end of the push rod 301 is connected to one end of the piston 302. have to;

The guide wire 4 passes through the pushing member 3 and penetrates the cavity of the needle 1. The outer diameter of the guide wire 4 is consistent with the inner diameter of the cavity of the needle 1. The guide wire 4 is integrated with the pushing member 3 and the needle 1 before puncturing.

Embodiment 2 A kind of using method of lumbar puncture needle that can measure cerebrospinal fluid oxygen partial pressure and biochemical index

The puncture needle is slowly inserted in the direction of the spinous process. During the needle insertion process, when needle 1 is punctured, the needle is inserted about 4-6cm for adults (about 3-4cm for children). The depth of the needle is determined according to the scale 101 set on needle 1. The dura mater can be penetrated to reach the subarachnoid space, part of the guide wire 4 is drawn out to observe whether the cerebrospinal fluid flows out, the guide wire 4 is drawn out, the push rod 301 is slowly moved, the fluid storage space is adjusted, the speed of cerebrospinal fluid collection is controlled, and the cerebrospinal fluid is slowly released. The volume of cerebrospinal fluid is observed through the scale set on the syringe 2, and when the volume reaches 2-3ml, stop moving the push rod 301.

After the cerebrospinal fluid collection is completed, the lumbar puncture needle of the utility model is pulled out, covered with a sterile gauze, fixed with adhesive tape, and the patient lies supine with the pillow removed for 4-6 hours. Disassemble the connection between the needle head 1 and the front end of the syringe barrel 2, and buckle the live cover 202 in time to seal the syringe barrel 2. Take the sealed syringe 2 to measure the oxygen partial pressure of the cerebrospinal fluid, open the flap 202, install the joint 201 that matches the liquid inlet of the oxygen partial pressure measuring instrument on the oxygen partial pressure measuring instrument, and measure the oxygen partial pressure of the cerebrospinal fluid. .

The technical scheme protected by the present invention can also be used for drug injection. When the patient needs to inject drugs through lumbar puncture, the medical staff can also open the flap 202 and replace the needle 1 with a common injection needle to perform drug injection.

Claims (9)

1. a lumbar puncture needle that can measure cerebrospinal fluid oxygen partial pressure and biochemical index, comprises needle (1), guide wire (4), and needle (1) is a hollow cavity, it is characterized in that, described lumbar puncture needle also It comprises a syringe (2) and a pushing part (3); the syringe (2) is made of transparent material, the front end of the syringe (2) is provided with a joint (201), the joint (201) is connected with the needle (1), and the pushing part (3) is arranged in the needle cylinder (2), the push member (3) includes a push rod (301) and a piston (302), one end of the push rod (301) is connected with the piston (302), and one end of the push rod (301) is exposed to the outside At the rear end of the needle cylinder (2), the guide wire (4) passes through the pushing member (3) and passes through the inner cavity of the needle head (1). 2 . The lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes according to claim 1 , wherein the needle barrel ( 2 ) is provided with a scale. 3 . 3. A lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes according to claim 1, wherein the inner diameter of the needle (1) is 0.184mm-1.283mm. 4. A lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes according to claim 1, characterized in that the outer diameter of the guide wire (4) matches the inner diameter of the cavity of the needle (1). 5. A lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes according to claim 1, characterized in that, a live cover (202) is provided at the opening of the joint (201). 6 . The lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes according to claim 1 , wherein the opening of the joint ( 201 ) matches the liquid inlet of the oxygen partial pressure measuring instrument. 7 . 7. The lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes according to claim 1, characterized in that the piston (302) is made of a hole stone material. 8. A lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes according to claim 1, wherein the joint (201) provided at the front end of the needle (1) and the syringe (2) can be Remove the connection. 9. A lumbar puncture needle capable of measuring cerebrospinal fluid oxygen partial pressure and biochemical indexes according to claim 1, wherein a scale (101) is provided on the needle (1).

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