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CN-122004945-A - Department of neurology cerebrospinal fluid sampling device

CN122004945ACN 122004945 ACN122004945 ACN 122004945ACN-122004945-A

Abstract

The invention discloses a cerebrospinal fluid sampling device for neurology, and belongs to the technical field of medical appliances. The device comprises a shell, a puncture needle assembly, a guide mechanism and a warning assembly. The puncture needle tube is connected with the front end of the floating needle seat, and the rear end of the floating needle seat is connected with the transmission guide rod. The transmission guide rod is fixedly connected to the rear end of the floating needle seat and penetrates through the limit guide support to be in sliding connection with the limit guide support, the reset spring is installed on the transmission guide rod, the micro switch is installed on the installation plate in the shell, and the micro switch is located on the moving path of the transmission guide rod. When the micro-switch is used, the resistance of the ligamentum flavum can push the floating needle seat backwards, so that the micro-switch is triggered, the circuit is closed, and the indicator lamp is lightened. Once the resistance of the ligamentum flavum is reduced, the spring is reset, and the indicator light is extinguished. Thereby providing visual feedback of the puncture location. Therefore, the invention reduces the probability of inaccurate subjective judgment and possible nerve injury in the traditional puncture operation, and has the advantages of stable operation, high safety and the like.

Inventors

  • GAO JIYING

Assignees

  • 河北北方学院附属第一医院

Dates

Publication Date
20260512
Application Date
20260311

Claims (9)

  1. 1. The neurological cerebrospinal fluid sampling device is characterized by comprising a shell, a puncture needle assembly, a guide mechanism and a warning assembly; the puncture needle assembly comprises a puncture needle tube and a floating needle seat, and the puncture needle tube is detachably arranged at the front end of the floating needle seat; The guide mechanism comprises a limit guide bracket, a transmission guide rod, a reset spring and a micro switch, wherein the limit guide bracket is fixedly arranged in the shell, the transmission guide rod is fixedly connected to the rear end of the floating needle seat and penetrates through the limit guide bracket to be in sliding connection with the limit guide bracket, the reset spring is arranged on the transmission guide rod, the micro switch is arranged on a mounting plate in the shell, and the micro switch is positioned on a moving path of the transmission guide rod; the warning component comprises a power supply and a luminous piece arranged on the surface of the shell, and the micro switch, the luminous piece and the power supply are mutually connected in series to form a loop.
  2. 2. The neurological cerebrospinal fluid sampling device according to claim 1, further comprising an elastic force adjustment assembly comprising a pre-tightening force adjustment slider, a nut seat, an adjustment screw, a rear seat, and a rotation knob; the pretightening force adjusting slide block is connected with the inner wall of the shell in a sliding way and is positioned at one end of the reset spring far away from the needle seat; One end of the reset spring is abutted against the limiting ring of the transmission guide rod, and the other end of the reset spring is abutted against the pretightening force adjusting slide block; The nut seat is fixedly connected with one side of the pretightening force adjusting sliding block, which is far away from the reset spring; the rear seat is fixedly arranged at the rear end of the shell, the rear seat is rotationally connected with a rotary knob, one end of the adjusting screw is fixedly connected with the rotary knob, and the other end of the adjusting screw is screwed into the nut seat and is in threaded connection with the nut seat.
  3. 3. The neurological cerebrospinal fluid sampling device according to claim 1, further comprising a plurality of sets of anti-shake hysteresis components comprising a magnetic conductor and a permanent magnet; The magnetic conductor is arranged on one side of the limit guide bracket facing the floating needle seat, and the permanent magnet is arranged on one side of the floating needle seat facing the limit guide bracket.
  4. 4. The neurological cerebrospinal fluid sampling device according to claims 2 and 3, further comprising a plurality of groups of magnetic force adjusting mechanisms, wherein each group of magnetic force adjusting mechanisms comprises two guide plates fixedly connected with a limiting guide bracket, a guide groove is formed in each guide plate, a nonmagnetic sliding block is slidably arranged in each guide groove, a magnetic conductor is specifically arranged on the nonmagnetic sliding block and is positioned between the two guide plates, one end of the nonmagnetic sliding block is fixedly connected with the inner wall of the shell through an elastic reset piece, and the other end of the nonmagnetic sliding block is fixedly connected with the pretightening force adjusting sliding block through a non-elastic flexible traction belt.
  5. 5. The neurological cerebrospinal fluid sampling device according to claim 2, wherein a through hole is formed in one end of the nut seat adjacent to the pretightening force adjusting slider, the mounting plate passes through the through hole, and the microswitch is located in the through hole of the nut seat.
  6. 6. The neurological cerebrospinal fluid sampling device according to claim 1, wherein in the initial state, a safe distance is left between the floating needle holder and the limit guide bracket, and the safe distance is less than or equal to 1 mm.
  7. 7. The neurological cerebrospinal fluid sampling device according to claim 2, wherein the outer surface of the rear seat is printed with indicia of a target population, and the rotary knob is provided with a corresponding indication arrow.
  8. 8. The neurological cerebrospinal fluid sampling device according to claim 1, wherein a positioning groove is formed in one surface of the floating needle seat facing the puncture needle tube, a second permanent magnet is embedded in the inner wall of the positioning groove, and the puncture needle tube is made of a magnetic conductive material.
  9. 9. The neurological cerebrospinal fluid sampling device according to claim 1, wherein a linear bearing capable of guiding the drive guide rod is installed in the limit guide bracket.

Description

Department of neurology cerebrospinal fluid sampling device Technical Field The invention relates to the technical field of medical instruments, in particular to a cerebrospinal fluid sampling device for neurology. Background In clinical practice, cerebrospinal fluid collection (lumbar puncture) is a routine procedure in neurology and anesthesia. In doing so, the physician needs to precisely insert the needle into the subarachnoid space of the patient. The puncture needle sequentially passes through the skin, subcutaneous tissue, supraspinal ligament and interspinous ligament, finally passes through the yellow ligament to enter the epidural space, and then passes through the dura mater and the arachnoid membrane to reach the subarachnoid space for sampling. Traditional puncturing methods rely primarily on the feel of the physician. When the needle reaches the ligamentum flavum, the physician will feel significant resistance due to tissue density, which will disappear once the needle passes through the ligamentum flavum. The physician relies primarily on this resistance change to determine whether the needle has passed through the ligamentum flavum. However, this conventional approach based on experience and touch suffers from the following drawbacks: 1. highly dependent on experience, a doctor with insufficient experience is difficult to accurately sense the sudden change of resistance, and erroneous judgment is easy to cause; 2. Safety risk-after passing through the ligamentum flavum, behind it is a nerve-rich dangerous area. If the doctor fails to notice the reduction of resistance and stops pressing, the puncture needle can puncture too deeply due to inertia, and the nerve root or spinal cord blood vessel is damaged; 3. Lack of objective indicators-lack of visual objective signals to help the physician determine the location of the needle tip. Disclosure of Invention The invention aims to provide a neurological cerebrospinal fluid sampling device for solving the technical problems in the background technology. The embodiment of the invention provides a neurological cerebrospinal fluid sampling device, which comprises a shell, a puncture needle assembly, a guide mechanism and a warning assembly, wherein the puncture needle assembly is arranged on the shell; the puncture needle assembly comprises a puncture needle tube and a floating needle seat, and the puncture needle tube is detachably arranged at the front end of the floating needle seat; The guide mechanism comprises a limit guide bracket, a transmission guide rod, a reset spring and a micro switch, wherein the limit guide bracket is fixedly arranged in the shell, the transmission guide rod is fixedly connected to the rear end of the floating needle seat and penetrates through the limit guide bracket to be in sliding connection with the limit guide bracket, the reset spring is arranged on the transmission guide rod, the micro switch is arranged on a mounting plate in the shell, and the micro switch is positioned on a moving path of the transmission guide rod; the warning component comprises a power supply and a luminous piece arranged on the surface of the shell, and the micro switch, the luminous piece and the power supply are mutually connected in series to form a loop. Preferably, the device also comprises an elastic force adjusting component capable of adjusting the pretightening force of the reset spring according to different patients, wherein the elastic force adjusting component comprises a pretightening force adjusting sliding block, a nut seat, an adjusting screw rod, a rear seat and a rotary knob; the pretightening force adjusting slide block is connected with the inner wall of the shell in a sliding way and is positioned at one end of the reset spring far away from the needle seat; One end of the reset spring is abutted against the limiting ring of the transmission guide rod, and the other end of the reset spring is abutted against the pretightening force adjusting slide block; The nut seat is fixedly connected with one side of the pretightening force adjusting sliding block, which is far away from the reset spring; the rear seat is fixedly arranged at the rear end of the shell, the rear seat is rotationally connected with a rotary knob, one end of the adjusting screw is fixedly connected with the rotary knob, and the other end of the adjusting screw is screwed into the nut seat and is in threaded connection with the nut seat. Preferably, the anti-shake hysteresis module further comprises a plurality of groups of anti-shake hysteresis modules, wherein each anti-shake hysteresis module comprises a magnetic conductor and a permanent magnet; The magnetic conductor is arranged on one side of the limit guide bracket facing the floating needle seat, and the permanent magnet is arranged on one side of the floating needle seat facing the limit guide bracket. Preferably, the device further comprises a plurality of groups of magnetic force adjusting