Cerebrospinal fluid lumbar puncture needle pressure measuring device

Abstract

The utility model relates to a cerebrospinal fluid lumbar puncture needle pressure measuring device which comprises a puncture needle tube, a puncture needle core and a brain pressure gauge, the puncture needle core is arranged in the puncture needle tube in a penetrating mode, the brain pressure gauge is connected with the puncture needle tube through a pressure measuring tube, a liquid outlet tube is arranged on the side edge of the puncture needle tube, and a first connector is arranged at the end of the liquid outlet tube. A second connector is arranged at the end, facing the liquid outlet pipe, of the pressure measuring pipe and abuts against the first connector, a movable connecting sleeve is arranged on the outer side of the second connector, one end of the connecting sleeve abuts against the outer side of the second connector, the other end of the connecting sleeve is in threaded connection with the first connector, and an anti-loosening structure is arranged on the first connector. The first connector and the second connector are connected through the connecting sleeve, only the connecting sleeve needs to be rotated during installation, the operation difficulty is reduced, the installation position of the pressure measuring pipe is convenient to adjust, the connecting sleeve is prevented from loosening through the anti-loosening structure, and the stability of connection between the pressure measuring pipe and the liquid outlet pipe is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical puncture equipment, in particular to a cerebrospinal fluid lumbar puncture needle pressure measuring device. Background Art

[0002] Lumbar puncture is one of the commonly used examination methods in neurology. It is of great value in the diagnosis and treatment of neurological diseases, simple and easy to perform, and relatively safe. The lumbar puncture needle is a tool used to puncture the patient's lumbar spine to obtain cerebrospinal fluid during lumbar puncture. In order to measure the patient's cerebrospinal fluid pressure, it is necessary to puncture the lumbar spine with a puncture needle. After the puncture is successful, the tail of the puncture needle is connected to an L-shaped pressure measuring tube.

[0003] At present, the pressure measuring tube and the lumbar puncture needle need to be connected during operation, and the sealing of the interface is poor, which can easily lead to cerebrospinal fluid leakage and cause inaccurate pressure measuring structure. For example, Chinese utility model patent with publication number CN219000361U discloses a cerebrospinal fluid lumbar puncture needle pressure measuring device, including a lumbar puncture needle and a pressure measuring tube. The lumbar puncture needle includes a needle tube, a needle core and a needle seat. The tail end of the needle seat is provided with a threaded sleeve connected to the pressure measuring tube, the inner wall of the threaded sleeve is provided with an internal thread, and a sealing ring is provided inside the threaded sleeve. The pressure measuring tube is an L-shaped tubular body, and one end of the horizontal section of the pressure measuring tube is provided with an external thread connected to the threaded sleeve. The vertical section of the pressure measuring tube is a water storage tube. However, this pressure measuring tube installation method has the following problems: 1. The threaded connection method has the problem of leakage; 2. The entire pressure measuring tube needs to be rotated during installation, which increases the difficulty of one-handed operation, and it is inconvenient to adjust the position of the pressure measuring tube during installation. Utility Model Content

[0004] The utility model aims to provide a cerebrospinal fluid lumbar puncture needle pressure measuring device to solve the problems raised by the background technology.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical scheme: a cerebrospinal fluid lumbar puncture pressure measuring device, comprising: a puncture needle tube, a puncture needle core and a brain pressure gauge, the puncture needle core is inserted into the puncture needle tube, the brain pressure gauge is connected to the puncture needle tube through a pressure measuring tube, a liquid outlet tube is arranged on the side of the puncture needle tube, a first connector is arranged at the end of the liquid outlet tube, a second connector is arranged at one end of the pressure measuring tube facing the liquid outlet tube, the second connector is abutted against the first connector, a movable connecting sleeve is arranged on the outside of the second connector, one end of the connecting sleeve is pressed against the outside of the second connector, and the other end is screwed on the first connector, and an anti-loosening structure is arranged on the first connector.

[0006] Preferably, the inner wall of the connecting sleeve is provided with an internal thread, and the outer side of the first connecting head is provided with a matching external thread.

[0007] Preferably, a through hole is provided at one end of the connecting sleeve away from the first connecting head, the pressure measuring tube is passed through the through hole, and the aperture of the through hole is smaller than the outer diameter of the second connecting head.

[0008] Preferably, the anti-loosening structure comprises a retaining ring and a spring washer arranged on the outside of the first connecting head, and the spring washer is sleeved on the outside of the first connecting head and is located between the connecting sleeve and the retaining ring.

[0009] Preferably, the end face of the second connector is provided with a positioning convex ring, and the positioning convex ring is inserted into the liquid outlet pipe.

[0010] Preferably, an annular groove is provided on the end face of the second connector, the annular groove is arranged outside the positioning convex ring, and a sealing ring is provided in the annular groove.

[0011] Preferably, a flow control valve is provided on the liquid outlet pipe.

[0012] Preferably, the pressure measuring tube is an L-shaped tube.

[0013] Preferably, an observation tube opening is provided on the side of the puncture needle tube opposite to the liquid outlet tube, and a sealing plug is provided at the observation tube opening.

[0014] The beneficial effects of the utility model are as follows: the utility model connects the first connector and the second connector through a connecting sleeve. During installation, only the connecting sleeve needs to be rotated, which not only reduces the difficulty of operation but also facilitates adjustment of the installation position of the pressure measuring tube. An anti-loosening structure is provided to prevent the connecting sleeve from loosening, thereby ensuring the stability of the connection between the pressure measuring tube and the liquid outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0016] Figure 2 It is an exploded view of an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the connection between the first connector and the second connector in an embodiment of the utility model;

[0018] In the figure: 1-puncture needle tube, 2-puncture needle core, 3-cerebral pressure gauge, 4-pressure measuring tube, 5-liquid outlet tube, 6-first connector, 7-second connector, 8-connecting sleeve, 9-spring washer, 10-blocking ring, 11-through hole, 12-annular groove, 13-sealing ring, 14-positioning convex ring, 15-flow control valve, 16-observation tube mouth, 17-sealing plug. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] This specific embodiment is merely an explanation of the present utility model, and it is not a limitation of the present utility model. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as it is within the scope of the claims of the present utility model, it shall be protected by the patent law.

[0021] Example: Figure 1 , Figure 2 and Figure 3 As shown, a cerebrospinal fluid lumbar puncture pressure measuring device includes: a puncture needle tube 1, a puncture needle core 2 and a brain pressure gauge 3, the puncture needle core 2 is inserted into the puncture needle tube 1, and the brain pressure gauge 3 is connected to the puncture needle tube 1 through a pressure measuring tube 4, and the pressure measuring tube 4 is an L-shaped tube.

[0022] A liquid outlet pipe 5 is arranged on the side of the puncture needle tube 1, and a flow control valve 15 is arranged on the liquid outlet pipe 5. An observation pipe opening 16 is arranged on the side of the puncture needle tube 1 opposite to the liquid outlet pipe 5, and a sealing plug 17 is arranged at the observation pipe opening 16.

[0023] A first connector 6 is provided at the end of the liquid outlet pipe 5, and a second connector 7 is provided at one end of the pressure measuring tube 4 facing the liquid outlet pipe 5. The second connector 7 is abutted against the first connector 6, and a movable connecting sleeve 8 is provided on the outer side of the second connector 7. One end of the connecting sleeve 8 is pressed against the outer side of the second connector 7, and the other end is screwed on the first connector 6.

[0024] The connecting sleeve 8 is a sleeve structure, the inner wall of the connecting sleeve 8 is provided with an internal thread, and the outer side of the first connecting head 6 is provided with a matching external thread.

[0025] The end of the connecting sleeve 8 away from the first connector 6 is provided with a through hole 11, and the pressure measuring tube 4 is inserted into the through hole 11. The aperture of the through hole 11 is smaller than the outer diameter of the second connector 7. The connecting sleeve 8 is sleeved on the outside of the pressure measuring tube 4 and the second connector 7, and can move forward and backward or rotate circumferentially.

[0026] An annular groove 12 is disposed on the end surface of the second connector 7 . The annular groove 12 is disposed outside the positioning convex ring 14 . A sealing ring 13 is disposed inside the annular groove 12 .

[0027] The end surface of the second connector 7 is provided with a positioning convex ring 14, which is inserted into the liquid outlet tube 5. The positioning convex ring 14 is connected to the liquid outlet tube 5 by interference fit, preventing cerebrospinal fluid from entering the gap between the end surfaces of the first connector 6 and the second connector 7 from the liquid outlet tube 5, so that the cerebrospinal fluid directly flows from the liquid outlet tube 5 into the pressure measuring tube 4.

[0028] The first connector 6 is provided with an anti-loosening structure, which includes a retaining ring 10 and a spring washer 9 arranged outside the first connector 6. The spring washer 9 is sleeved on the outside of the first connector 6 and is located between the connecting sleeve 8 and the retaining ring 10. The retaining ring 10 is an integral structure with the first connector 6. When the connecting sleeve 8 is installed in place, the elastic force generated by the extrusion deformation of the spring washer 9 acts on the end of the connecting sleeve 8 to prevent the connecting sleeve 8 from reversing and loosening.

[0029] When in use, first determine the positions of the puncture needle tube 1 and the intracranial pressure gauge 3 according to the body position and operating position, then dock the first connector 6 with the second connector 7, and screw the connecting sleeve 8 onto the first connector 6 by rotating the connecting sleeve 8. The other end of the connecting sleeve 8 tightly connects the first connector 6 with the second connector 7 through pressure to complete the installation of the pressure measuring tube 4 and the intracranial pressure gauge 3; then slowly pull out the puncture needle core 2 to allow cerebrospinal fluid to flow into the puncture needle tube 1, and when cerebrospinal fluid is observed to flow out of the observation tube opening 16, immediately block the observation tube opening 16 with a sealing plug 17, and then open the flow control valve 15 to allow cerebrospinal fluid to enter the pressure measuring tube 4. The intracranial pressure can be accurately measured through the intracranial pressure gauge 3, and the flow rate of the cerebrospinal fluid can be controlled by the flow control valve 15 to avoid symptoms of brain hernia when too much fluid is released too quickly.

Claims

1. A cerebrospinal fluid lumbar puncture pressure measuring device, comprising: A puncture needle tube (1), a puncture needle core (2) and a brain pressure gauge (3), wherein the puncture needle core (2) is inserted into the puncture needle tube (1), and the brain pressure gauge (3) is connected to the puncture needle tube (1) via a pressure measuring tube (4), characterized in that a liquid outlet tube (5) is provided on the side of the puncture needle tube (1), a first connector (6) is provided at the end of the liquid outlet tube (5), a second connector (7) is provided at one end of the pressure measuring tube (4) facing the liquid outlet tube (5), the second connector (7) abuts against the first connector (6), a movable connecting sleeve (8) is provided on the outside of the second connector (7), one end of the connecting sleeve (8) abuts against the outside of the second connector (7), and the other end is screwed on the first connector (6), and an anti-loosening structure is provided on the first connector (6).

2. A cerebrospinal fluid lumbar puncture pressure measuring device according to claim 1, characterized in that: The inner wall of the connecting sleeve (8) is provided with an internal thread, and the outer side of the first connecting head (6) is provided with a matching external thread.

3. A cerebrospinal fluid lumbar puncture pressure measuring device according to claim 2, characterized in that: A through hole (11) is provided at one end of the connecting sleeve (8) away from the first connecting head (6), the pressure measuring tube (4) is inserted into the through hole (11), and the aperture of the through hole (11) is smaller than the outer diameter of the second connecting head (7).

4. A cerebrospinal fluid lumbar puncture pressure measuring device according to claim 1, characterized in that: The anti-loosening structure comprises a retaining ring (10) and a spring washer (9) arranged on the outside of the first connecting head (6); the spring washer (9) is sleeved on the outside of the first connecting head (6) and is located between the connecting sleeve (8) and the retaining ring (10).

5. A cerebrospinal fluid lumbar puncture pressure measuring device according to claim 1, characterized in that: The end surface of the second connector (7) is provided with a positioning convex ring (14), and the positioning convex ring (14) is inserted into the liquid outlet pipe (5).

6. A cerebrospinal fluid lumbar puncture pressure measuring device according to claim 5, characterized in that: The end surface of the second connector (7) is provided with an annular groove (12), the annular groove (12) is arranged outside the positioning convex ring (14), and a sealing ring (13) is arranged inside the annular groove (12).

7. A cerebrospinal fluid lumbar puncture pressure measuring device according to claim 1, characterized in that: The liquid outlet pipe (5) is provided with a flow control valve (15).

8. A cerebrospinal fluid lumbar puncture pressure measuring device according to claim 1, characterized in that: The pressure measuring tube (4) is an L-shaped tube.

9. A cerebrospinal fluid lumbar puncture pressure measuring device according to claim 1, characterized in that: An observation tube opening (16) is provided on the side of the puncture needle tube (1) opposite to the liquid outlet tube (5), and a sealing plug (17) is provided at the observation tube opening (16).

Images