CN207590740U - The flux controllable digitlization waist of cerebrospinal fluid wears measuring cell - Google Patents

Abstract

The utility model relates to the field of medical equipment, in particular to a digital lumbar puncture manometer with controllable cerebrospinal fluid flow, which comprises a lumbar puncture needle connection end, a cerebrospinal fluid tube connection end, a pressure sensor and a digital display head. The inner part is narrowed to form a valve seat, and the valve seat divides the inner cavity of the instrument housing into a cerebrospinal fluid drainage cavity and a pressure detection cavity. When the valve head fits tightly with the valve seat, the cerebrospinal fluid drainage cavity and the pressure detection cavity The channel between the pressure detection chambers is blocked, and when the valve head leaves the valve seat, the cerebrospinal fluid drainage chamber communicates with the pressure detection chamber; a connection end of a lumbar puncture needle and a cerebrospinal fluid tube The connecting end of the cerebrospinal fluid tube is a section of 90° elbow. Compared with the prior art, the utility model has the advantages that: not only the pressure value can be read out at all times before and during the collection of cerebrospinal fluid, but also the intracranial pressure value after the lumbar puncture can be displayed, which is very important for the resting position of the patient after the lumbar puncture. and medication are instructive.

Description

Digital lumbar puncture manometer with controllable cerebrospinal fluid flow

technical field

The utility model relates to the field of clinical medicine and medical equipment, in particular to a digital lumbar puncture manometer with controllable cerebrospinal fluid flow rate, which can be widely used in neurology, surgery, etc. to monitor the intracranial pressure of patients and do lumbar puncture. When puncturing cerebrospinal fluid.

Background technique

Lumbar puncture is a diagnostic operation often performed in neurology and surgery. It is mainly used for the identification of diseases such as encephalitis, demyelinating disease, paraneoplastic syndrome, and subarachnoid hemorrhage. Important value, any imaging examination can not replace the importance of lumbar puncture. At present, the main steps of lumbar puncture are: 1) The patient lies supine with the pillow removed, bends the neck and hips, hugs the knees with both hands, and keeps the shoulders perpendicular to the bed surface; 2) Select the gap between waist 3-4 or waist 4-5; 3) Disinfection, draping, and local anesthesia; 4) The puncture needle reaches the subarachnoid space after 2 missed passes. 5) Pressure measurement: pull out the needle core, connect the pressure measurement tube, the cerebrospinal fluid flows into the pressure measurement tube, and read out the corresponding value. 6) Take the cerebrospinal fluid in the pressure measuring tube for testing. 7) Pull out the pressure measuring tube, put back the needle core, pull out the lumbar puncture needle, disinfect, cover with gauze, press locally, and the operation is completed.

The disadvantages of this operation method are: single process goal, complex operation, and many risks, such as: 1) The lumbar puncture needle has no scale, and the puncture depends entirely on the doctor's experience and feel, while clinical patients often need repeated lumbar punctures, each time Meeting different doctors, the first puncture process has nothing to do with the success of the next lumbar puncture, and it cannot serve as a reminder; 2) For patients with intracranial hypertension risk, connecting the pressure measuring tube increases the risk of brain herniation. , When the cerebrospinal fluid is sprayed out in a line or the value of the piezometer tube is greater than 300mmh20 (that is, the two glass piezometer tubes are connected), stop the pressure measurement, otherwise the patient is at risk of brain herniation. Once the brain herniation occurs, the patient has a high chance of sudden death. 3) After the pressure measurement, remove the pressure measuring tube and collect the CSF sample. This process is cumbersome, wastes part of the CSF, and it is difficult to control the CSF flow rate during the CSF collection process. 4) After the cerebrospinal fluid is collected, it is difficult to estimate the pressure of the patient after lumbar puncture, and it is impossible to accurately guide the patient's rest position and medication after lumbar puncture. 5) The pressure measurement process has many steps and takes more time, which greatly increases the psychological pressure of the patient.

Domestic patent number ZL201420437006.0 discloses "an improved lumbar puncture needle". The technical solution adopted is: it is composed of a needle tube and a needle seat, a small hole is provided on the back side of the needle tip, and an external interface is provided at the outer end of the needle seat. The outer interface is connected to the hose, the hose is controlled by the pressure measuring tube and the drainage tube through the three-way valve, the pressure measuring tube is connected to the pressure sensor gauge, the drainage tube is provided with a plug, the hose on the outer interface can be pulled out, and inserted into the dura outer catheter. Its advantages are simple operation, reduced chance of contamination, control of cerebrospinal fluid flow rate, and constant monitoring of cerebrospinal fluid pressure. The disadvantage is that the plug is easy to fall off, and the effect of controlling the flow rate of cerebrospinal fluid is not stable.

The domestic patent No. ZL201220085675.7 discloses "an automatic pressure-measuring lumbar puncture needle". Core, three-way drainage tube, semiconductor strain gauge, and data transmission line. A three-way drainage tube and two holes are designed on the needle seat of the puncture needle. The side hole is a pressure detection hole, and the straight hole is a drainage hole. The cerebrospinal fluid passing through the three-way drainage tube is connected to the semiconductor strain gauge in the side hole. After the strain gauge senses the pressure signal, the biological signal is transmitted to the electronic pressure detector through the data line. The electronic pressure detector is equipped with a signal amplification module and a conversion module. , to convert the biological signal into a digital signal and display it. The advantage is that the pressure can be measured before the drainage of the cerebrospinal fluid, and the drainage is performed only when the pressure of the cerebrospinal fluid is safe, which is safer. The disadvantage is that the straight hole is used as the drainage hole, which is inconvenient to drain and take the liquid, especially when the intracranial pressure is high, it is easy to splash.

Utility model content

The purpose of this utility model is to provide a digital lumbar puncture manometer with controllable cerebrospinal fluid velocity and flow rate, which overcomes the deficiencies of the prior art, applies digital pressure detection technology to lumbar puncture manometer, and can be left without removing the manometer tube. Take cerebrospinal fluid, and can adjust the flow rate of cerebrospinal fluid according to the pressure value to ensure the safety of lumbar puncture operation; it can display the intracranial pressure value after lumbar puncture, which is of guiding significance for the patient's rest position and medication after lumbar puncture; when the patient's cerebrospinal fluid pressure is too high In this case, the intracranial pressure can be read out safely, reducing the incidence of brain herniation and helping to evaluate the condition.

In order to achieve the above object, the technical solution of the utility model is as follows.

The digital lumbar puncture manometer with controllable cerebrospinal fluid flow includes a lumbar puncture needle connection end, a cerebrospinal fluid tube connection end, a pressure sensor and a digital display head, and is characterized in that it includes an instrument housing, a valve stem, a valve head, a valve seat and a nut The inner portion of the instrument shell is partially narrowed to form a valve seat, which divides the inner cavity of the instrument shell into a cerebrospinal fluid drainage cavity and a pressure detection cavity. The valve seat matches the shape of the valve head. When the valve head and When the valve seat fits tightly, the passage between the cerebrospinal fluid drainage chamber and the pressure detection chamber is blocked; when the valve head leaves the valve seat, the cerebrospinal fluid drainage chamber and the pressure detection chamber The cavities are connected; the instrument shell is provided with a lumbar puncture needle connection end and a cerebrospinal fluid tube connection end, and the cerebrospinal fluid tube connection end is a section of 90° elbow.

The valve head is located at the bottom end of the valve stem, and an external thread section is provided on the valve stem to engage with the internal thread of the nut sleeve, and the nut sleeve is provided with an external thread to connect with the instrument housing. When the valve stem rotates left and right, the valve stem moves up and down relative to the nut sleeve.

The internal thread of the nut sleeve is a trapezoidal or rectangular thread with a pitch of 3-6mm.

The top of the valve stem is connected with a digital display head, and the digital display head passes through the center of the valve stem through the data line to connect with the pressure sensor located at the bottom of the valve stem, and the pressure sensor detects the pressure signal by the digital display The header is displayed in real time.

The data line is provided with no less than 3 coiled sections at the core of the valve stem.

The nut sleeve is connected with a gland, and a sealing packing is arranged between the gland and the nut sleeve.

The instrument housing is made of any transparent material among glass, transparent PC, directional plexiglass or polycarbonate.

The connecting end of the lumbar puncture needle is a tapered body with a large inside and a small outside, and the outer diameter of the tapered body matches the inner diameter of the needle seat of the lumbar puncture needle.

The needle body of the lumbar puncture needle is provided with a scale. The scale is 0 at the far end of the needle body and gradually increases along the proximal end of the needle body. The scale unit is mm.

Compared with the prior art, the utility model has the beneficial effects of.

1) After marking the scale on the lumbar puncture needle, it can prompt the depth of lumbar puncture and improve the probability of lumbar puncture success. pain.

2) The digital display pressure gauge is applied to the lumbar puncture pressure measurement, and the measurement is fast and accurate. Not only can the pressure value be read before the collection of cerebrospinal fluid, but also the pressure value can be read at any time during the collection process, and the pressure before the collection can be calculated. To avoid excessive difference, to ensure the safety of patients, at the same time, the pressure value after lumbar puncture can still be read after taking samples and closing the valve, which is of guiding significance for guiding patients to rest position and medication after lumbar puncture; If the pressure of the cerebrospinal fluid is too high, the intracranial pressure value can be quickly read in a safe situation, reducing the incidence of cerebral herniation and helping to evaluate the condition.

3) The shell of the instrument is made of transparent material, and it is possible to observe whether the cerebrospinal fluid enters the manometer and the color of the cerebrospinal fluid.

4) The performance of the valve adjustment structure is stable and reliable. When it is in the closed state, it can ensure that the cerebrospinal fluid will not flow out of the pressure detection chamber during pressure measurement. The size of the head opening adjusts the velocity and flow of cerebrospinal fluid.

5) The 90° elbow-shaped cerebrospinal fluid tube connection end is convenient to connect with the cerebrospinal fluid collection tube, which can effectively avoid splashing.

6) It can display the intracranial pressure value after lumbar puncture, which has guiding significance for patients' resting position and medication after lumbar puncture.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a closed state of a valve according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the structure of the valve in the open state of the embodiment of the utility model.

In the figure: 1- instrument shell, 2- valve stem, 3- valve head, 4- valve seat, 5- nut sleeve, 6- cerebrospinal fluid drainage chamber, 7- pressure detection chamber, 8- lumbar puncture needle connection end, 9- Connecting end of cerebrospinal fluid tube, 10-cerebrospinal fluid collection tube, 11-digital display head, 12-data cable, 13-pressure sensor, 14-gland, 15-sealing packing, 16-lumbar puncture needle, 17-needle seat, 18 - Scale.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model will be further described.

See Figure 1 and Figure 2, which are schematic diagrams of the embodiment of the digital lumbar puncture manometer with controllable cerebrospinal fluid flow in the present invention. The inside of the housing 1 is partially narrowed to form a valve seat 4. The valve seat 4 divides the inner cavity of the instrument housing into a cerebrospinal fluid drainage chamber 6 and a pressure detection chamber 7. The valve head 3 is located at the bottom of the valve stem 2. The valve head 3 and the valve seat 4 Shape matching, when the valve head 3 and the valve seat 4 are tightly fitted (the valve is closed), the channel between the cerebrospinal fluid drainage chamber 6 and the pressure detection chamber 7 is blocked, when the valve head 3 leaves the valve seat 4 (the valve is opened) , the cerebrospinal fluid drainage cavity 6 and the pressure detection cavity 7 are connected; the instrument housing 1 is provided with a lumbar puncture needle connection end 8 and a cerebrospinal fluid tube connection end 9, and the cerebrospinal fluid tube connection end 9 is a 90° elbow, when connected to the cerebrospinal fluid collection tube At 10 o'clock, vertically downward outlets are more effective in avoiding splashes than horizontal outlets.

The valve stem 2 is provided with an external thread segment and the internal thread of the nut sleeve 5, and the nut sleeve 5 is provided with an external thread to connect with the instrument housing 1. When the valve stem 2 rotates left and right, the valve stem 2 will be opposite to the nut sleeve 5. Move up and down, lift and lower the valve head 3 to realize the opening and closing of the valve.

The inner thread of the nut sleeve 5 is a rectangular thread with a pitch of 5 mm. Compared with the saw thread, this thread has low friction, is not easy to get stuck, and is easy to operate.

The top of the valve stem 2 is connected with a digital display meter 11, and the digital display meter passes through the center of the valve stem through a data line 12 and is connected with a pressure sensor 13 located at the bottom of the valve stem 2, and the pressure sensor 13 transmits the detected pressure signal by The digital display head 11 is displayed in real time. The digital display head 11 can not only display the pressure, but also be the operating end of the valve, and the rotation of the digital display head can realize the opening and closing of the valve.

The data line 12 is provided with a curling section with no less than 3 turns at the center of the valve stem. The role of the curling section is to avoid damage to the data line caused by rotation, and to ensure the stable and reliable operation of the pressure measuring instrument of the present utility model.

The nut sleeve 5 is connected with a gland 14, and a sealing packing 15 is arranged between the gland 14 and the nut sleeve 5. The function of the sealing packing 15 is to isolate the inside of the instrument housing from the outside to avoid contamination.

The instrument housing 1 is made of transparent PC material, which is convenient for observing whether the cerebrospinal fluid enters the manometer and the color of the cerebrospinal fluid, so as to ensure smooth operation.

The connecting end 8 of the lumbar puncture needle is a tapered body with a large inside and a small outside, and the outer diameter of the tapered body matches the inner diameter of the needle seat 17 of the lumbar puncture needle 16 . The needle body of the lumbar puncture needle 16 is provided with a scale 18, the scale is 0 at the far end of the needle body, and gradually increases along the proximal end of the needle body, and the scale unit is mm.

The specific application steps of the digital lumbar puncture manometer with controllable cerebrospinal fluid flow of the utility model are as follows.

1) The patient lies supine with the pillow removed, neck and hips bent, hands hugging the knees, and the shoulders are perpendicular to the bed surface.

2) Select the waist 3-4 or waist 4-5 gap position.

3) Disinfection, draping, and local anesthesia.

4) The puncture needle reaches the subarachnoid space after 2 missed shots.

5) After the lumbar puncture is successful, pull out the needle core of the lumbar puncture needle, connect the needle seat 17 directly to the connection end 8 of the lumbar puncture needle (the valve is closed at this time), and after the cerebrospinal fluid flows into the pressure detection chamber 7, the pressure sensor can be used to complete the measurement. Read the corresponding cerebrospinal fluid pressure value through the digital display head.

6) After recording the intracranial pressure value, open the valve, rotate the valve stem to adjust the cerebrospinal fluid flow rate according to the pressure value on the digital display head, place the cerebrospinal fluid collection tube 10 at the connection end 9 of the cerebrospinal fluid tube, and take a cerebrospinal fluid sample. Close the valve and read the intracranial pressure again after lumbar puncture.

7) Pull out the manometer, put back the needle core, pull out the lumbar puncture needle, disinfect, cover with gauze, press locally, and the operation is completed.

The above embodiments are only specific examples selected for the purpose of the utility model, technical solutions and beneficial effects in detail, but should not limit the scope of protection of the utility model. , the various modifications, equivalent replacements and improvements should fall within the protection scope of the present utility model.

Claims (9)

1. A digital lumbar puncture manometer with controllable cerebrospinal fluid flow, including a lumbar puncture needle connection end, a cerebrospinal fluid tube connection end, a pressure sensor and a digital display head, characterized in that it includes an instrument shell, a valve stem, a valve head, and a valve seat and a nut sleeve, the inside of the meter casing is partially narrowed to form a valve seat, the valve seat divides the inner cavity of the meter casing into a cerebrospinal fluid drainage chamber and a pressure detection chamber, the valve seat matches the shape of the valve head, when the valve When the head fits tightly with the valve seat, the channel between the cerebrospinal fluid drainage cavity and the pressure detection cavity is blocked; when the valve head leaves the valve seat, the cerebrospinal fluid drainage cavity and the The pressure detection chambers are connected; the instrument shell is provided with a lumbar puncture needle connection end and a cerebrospinal fluid tube connection end, and the cerebrospinal fluid tube connection end is a 90° elbow. 2. The digital lumbar puncture manometer with controllable cerebrospinal fluid flow according to claim 1, wherein the valve head is located at the bottom end of the valve stem, and the valve stem is provided with an external thread section and The internal thread of the nut sleeve is engaged, and the nut sleeve is provided with an external thread to connect with the instrument housing. When the valve stem rotates left and right, the valve stem will move up and down relative to the nut sleeve. 3. The digital lumbar puncture manometer with controllable cerebrospinal fluid flow according to claim 1, wherein the internal thread of the nut sleeve is a trapezoidal or rectangular thread with a pitch of 3-6 mm. 4. The digital lumbar puncture manometer with controllable cerebrospinal fluid flow according to claim 1, characterized in that, the top of the valve stem is connected with a digital display head, and the digital display head passes through the valve via a data line. The core of the rod is connected with the pressure sensor located at the bottom of the valve rod, and the pressure signal detected by the pressure sensor is displayed in real time by the digital display head. 5 . The digital lumbar puncture manometer with controllable cerebrospinal fluid flow according to claim 4 , wherein the data line is provided with a coiled section of not less than 3 turns at the center of the valve stem. 6 . The digital lumbar puncture manometer with controllable cerebrospinal fluid flow according to claim 1 , wherein a gland is attached to the nut sleeve, and a sealing packing is provided between the gland and the nut sleeve. 7. The digitalized lumbar puncture manometer with controllable cerebrospinal fluid flow according to claim 1, wherein the instrument housing is made of any transparent material in glass, transparent PC, directional plexiglass or polycarbonate production. 8. The digitalized lumbar puncture manometer with controllable cerebrospinal fluid flow according to claim 1, characterized in that, the connecting end of the lumbar puncture needle is a cone with a large inside and a small outside, and the outer diameter of the cone is the same as The inner diameter of the hub of the waist needle is matched. 9. The digitalized lumbar puncture manometer with controllable cerebrospinal fluid flow according to claim 8, characterized in that, the needle body of the lumbar puncture needle is provided with a scale, and the scale is 0 at the far end of the needle body, It gradually increases along the proximal end of the needle body, and the scale unit is mm.