Sampling device for cerebrospinal fluid inspection

Abstract

The invention relates to the technical field of neurology examination, and discloses a sampling device for cerebrospinal fluid examination, which comprises a human body model, a support assembly fixedly mounted on the outer wall of the human body model, an adjusting mechanism movably mounted on the inner wall of the support assembly, and a puncture assembly arranged between the human body model and the adjusting mechanism, the adjusting mechanism comprises a left side sliding block and a right side sliding block which are slidably connected to the inner wall of the supporting assembly, a pushing control assembly is arranged in the left side sliding block, and by arranging the pushing control assembly and a rotation control assembly in the adjusting mechanism, the control difficulty of slight pushing and slight rotation can be greatly reduced; the puncture needle tube is ensured to reach a specified position, discomfort and complication risks of a patient are reduced to the greatest extent, a propelling knob can be twisted during slight propelling, and an output shaft of the propelling knob drives a first reduction gear and a second reduction gear to rotate in a relatively decelerating manner through a first transmission gear.

Description

Technical Field

[0001] The present invention relates to the field of neurology testing technology, and in particular to a sampling device for cerebrospinal fluid testing. Background Art

[0002] The cerebrospinal fluid sampling device is a special medical device used to obtain cerebrospinal fluid samples from the subarachnoid space of the human body (usually through lumbar puncture). This sampling is crucial for the diagnosis of various central nervous system diseases (such as meningitis, cerebral hemorrhage, brain tumors, etc.). Lumbar puncture is usually performed in the space between the lumbar vertebrae L3-L4 or L4-L5 because it is easier to enter the subarachnoid space while avoiding damage to the spinal cord.

[0003] Patent publication number CN114767232A discloses a measurement sampling device for clinical neurology. First, a cannula is used to replace the puncture needle for holding the puncture. During the puncture, the puncture needle is affected by the puncture resistance and moves backward relative to the cannula in the puncture direction, and is reset in the opposite direction when the puncture resistance suddenly decreases. During the movement of the puncture needle when it is reset, the combined limiting coupling component can be used to limit its reset, thereby instantly limiting the position of the cannula to prevent it from continuing to approach the patient for puncture, thereby limiting the excessive puncture of the puncture needle in the cannula and effectively avoiding the problem of accidental injury to the intraspinal venous plexus.

[0004] The prior art has the following defects:

[0005] Unable to ensure that the puncture needle reaches the designated position: During lumbar puncture, the doctor will slowly insert the needle and judge the position of the needle tip by feeling the different resistances it passes through. When passing through the epidural layer and reaching the subarachnoid space, a sudden decrease in resistance will usually be felt, but this cannot ensure that the puncture needle has reached the designated position. If there is no cerebrospinal fluid outflow at this time, the doctor needs to slightly adjust the position of the needle, including slightly pushing inward, withdrawing or rotating the needle, but this slight force is very difficult to control, so an auxiliary device is needed to assist in the slight adjustment of the puncture needle to minimize the patient's discomfort and the risk of complications.

[0006] Rotation of the puncture needle during advancement cannot be avoided during slight adjustments: Rotation of the puncture needle during advancement will increase the risk of damaging surrounding tissues, especially the spinal nerve roots and dura mater, leading to unnecessary pain or other complications. If the direction of the needle needs to be adjusted, the doctor will usually make fine adjustments when the needle stops advancing completely, rather than rotating the needle while advancing. Therefore, an auxiliary device is needed to assist the puncture needle. Only one of the advancement and rotation can be performed during slight adjustments to avoid postoperative pain or the risk of other nerve damage.

[0007] Unable to fully control the patient's movements during surgery: If the patient moves during lumbar puncture, it will significantly affect the effect and safety of the puncture. Any movement of the patient may cause the puncture needle to shift, increase the risk of puncture failure, and even cause the needle to injure surrounding nerves or other important structures, thereby causing pain or other complications. Therefore, wrapping the auxiliary device around the patient can greatly reduce the negative impact of the patient's movements. Summary of the invention

[0008] In view of the problems in the prior art such as the inability to ensure that the puncture needle reaches the designated position, the inability to avoid the puncture needle rotating while being pushed forward during slight adjustments, and the inability to fully control the patient's movements during surgery, a sampling device for cerebrospinal fluid testing is proposed.

[0009] The present application provides a sampling device for cerebrospinal fluid testing, the purpose of which is to reduce the negative impact of the patient's movements by setting a support component and an adjustment mechanism, wherein the adjustment mechanism is fixed to the patient through the support component, and the adjustment mechanism has the effect of slight adjustment and control of pushing and rotating at different times.

[0010] The technical solution of the present invention is: a sampling device for cerebrospinal fluid testing, comprising a human body model, a support assembly fixedly mounted on the outer wall of the human body model, an adjustment mechanism movably mounted on the inner wall of the support assembly, and a puncture assembly arranged between the human body model and the adjustment mechanism, the adjustment mechanism comprising a left sliding block and a right sliding block slidably connected to the inner wall of the support assembly, a propulsion control assembly is arranged inside the left sliding block, two pushing limit assemblies are slidably connected between the left sliding block and the right sliding block, a left clamping plate and a right clamping plate are fixedly connected between the outer walls of the two pushing limit assemblies, and a rotation control assembly is arranged inside the left clamping plate;

[0011] The rotation control assembly includes a rotation knob rotatably connected to the outer wall of the left clamping plate, a second transmission gear sleeved on the output shaft of the rotation knob, a rotation half gear meshing with the teeth of the second transmission gear, and a rotation inner groove opened inside the left clamping plate and the right clamping plate. The outer wall of the rotation half gear is rotationally connected to the inner wall of the rotation inner groove, and the inner wall of the rotation half gear is fixedly connected to a clamping block.

[0012] By adopting the above scheme, the propulsion control component and the rotation control component are arranged together on the left side, which is convenient for the doctor to operate and avoids the risk of postoperative pain or other nerve damage caused by running the propulsion control component and the rotation control component at the same time. When rotating slightly, the rotating knob can be twisted, and the output shaft of the rotating knob drives the rotating half gear to rotate in the rotating inner groove through the second transmission gear. The total transmission ratio is 10:1, that is, the rotating knob rotates 45°, and the rotating half gear rotates 4.5°, which greatly reduces the difficulty of controlling slight rotation.

[0013] Furthermore, the pushing limit assembly includes two limit plates respectively slidably connected to the inner walls of the left sliding block and the right sliding block, two second sliding grooves respectively opened on the inner walls of the left sliding block and the right sliding block, a protective cover fixedly installed on the outer wall of the left limit plate, two racks fixedly connected to the inner walls of the two limit plates, and a pushing gear meshing with the teeth of the two racks, and the outer walls of the two limit plates are respectively slidably connected to the inner walls of the two second sliding grooves.

[0014] By adopting the above scheme, the propulsion control component is operated to drive the propulsion gear to rotate on the rack, so that the limit plate drives the left clamping plate and the right clamping plate to slide in the second sliding groove, thereby achieving a slight propulsion effect, and the limit plate is used to fix the left clamping plate and the right clamping plate, so that the left clamping plate and the right clamping plate can be pushed forward or withdrawn synchronously.

[0015] Furthermore, the propulsion control component includes two driven shafts fixedly connected to the inner walls of the two pushing gears, respectively. The two ends of the driven shafts are movably connected to the inner walls of the left sliding block and the right sliding block, respectively. The outer wall of the driven shaft is fixedly connected with a driven gear, and the two driven gears are both arranged inside the left sliding block.

[0016] Furthermore, the propulsion control assembly also includes a propulsion knob rotatably connected to the outer wall of the left sliding block, a first transmission gear sleeved on the output shaft of the propulsion knob, a first reduction gear meshing with the teeth of the first transmission gear, and a second reduction gear meshing with the teeth of the first reduction gear, and the first reduction gear and the second reduction gear are respectively connected to the two driven gears by two reduction toothed belts.

[0017] By adopting the above scheme, by twisting the advancing knob, the output shaft of the advancing knob drives the first reduction gear and the second reduction gear to rotate relatively at a reduced speed through the first transmission gear, and then drives the driven shaft to further rotate at a reduced speed through the reduction belt and the driven gear. The total transmission ratio is 20:1, that is, the advancing knob rotates one circle, and the driven shaft rotates 1 / 20 circle, which greatly reduces the difficulty of controlling slight advancement. The driven shaft then drives the pushing gear to rotate on the rack, so that the limit plate drives the left clamping plate and the right clamping plate to slide in the second sliding groove, thereby achieving the effect of slight advancement.

[0018] Furthermore, the puncture assembly includes a puncture needle tube clamped between a left clamping plate and a right clamping plate, a plurality of clamping grooves provided on the outer wall of the puncture needle tube, a puncture needle hole provided on the inner wall of the puncture needle tube, and a puncture needle core slidably connected to the inner wall of the puncture needle hole, and the inner wall of any one of the clamping grooves can be clamped with the outer wall of the clamping block.

[0019] By adopting the above scheme, the clamping block is engaged with the clamping groove closest to the puncture needle tube, so that the adjustment mechanism replaces the puncture needle tube for adjustment. When sampling, the puncture needle core in the puncture needle tube is pulled out. If cerebrospinal fluid is seen flowing out of the puncture needle hole, it can be confirmed that the position of the puncture needle tube is correct, and then a pressure gauge is connected to the puncture needle hole for pressure detection.

[0020] Furthermore, the support component includes a puncture mark point fixedly connected to the outer wall of the human body model, and the puncture component is slidably connected to the inside of the human body model by penetrating the puncture mark point.

[0021] By adopting the above scheme, the doctor can plan in advance the puncture position of the puncture needle during lumbar puncture by setting the puncture marking points. The doctor wears sterile gloves, holds the puncture needle tightly, and vertically pierces the skin along the puncture marking point and gradually goes deeper. When a "pop" sound is heard, it indicates that the needle has passed through the dura mater and entered the subarachnoid space.

[0022] Furthermore, the support assembly also includes medical gauze laid on the outer wall of the human body model, a medical bandage wrapped around the outer wall of the human body model, and a support frame fixedly connected between the two ends of the medical bandage, and the outer wall of the support frame overlaps the outer wall of the medical gauze.

[0023] Furthermore, the outer wall of the support frame is rotatably connected to a plurality of threaded telescopic rods, and two support rods are respectively threadedly connected between the outer walls of the plurality of threaded telescopic rods.

[0024] Furthermore, two first sliding grooves are provided on the inner walls of the two support rods, and the inner walls of the first sliding grooves are respectively slidably connected to the outer walls of the left sliding block and the right sliding block.

[0025] By adopting the above scheme, medical gauze is laid on the outside of the human body model, and a medical bandage is used to wrap around the waist of the human body model to tie the support frame to the outside of the medical gauze, and the support rod is adjusted to a suitable depth position through the threaded telescopic rod. At this time, the adjustment mechanism is in the initial state, the left sliding block and the right sliding block are respectively at the leftmost and rightmost sides of the support rod, and the left sliding block and the right sliding block can be slid through the first sliding groove.

[0026] Furthermore, the outer wall of the right sliding block is fixedly connected to a test tube base, and a plurality of dripping test tubes are placed on the inner wall of the test tube base.

[0027] Using the above scheme, cerebrospinal fluid sampling is performed by using the drip tube on the tube base. If the cerebrospinal fluid pressure continues to be abnormal, further cerebrospinal fluid extraction is stopped to avoid potential brain herniation or other serious complications, and the patient's overall condition needs to be further evaluated.

[0028] Beneficial effects of the present invention:

[0029] 1. By setting the propulsion control component and the rotation control component in the adjustment mechanism, the control difficulty of slight propulsion and slight rotation can be greatly reduced, ensuring that the puncture needle reaches the designated position, and minimizing the patient's discomfort and complication risks. When slightly propulsing, the propulsion knob can be twisted, and the output shaft of the propulsion knob drives the first reduction gear and the second reduction gear to rotate relatively at a reduced speed through the first transmission gear, and then drives the driven shaft to further reduce and rotate through the reduction gear belt and the driven gear. The total transmission ratio is 20:1, that is, the propulsion knob rotates one circle, and the driven shaft rotates 1 / 20 circle, which greatly reduces the control difficulty of slight propulsion. The driven shaft then drives the push gear to rotate on the rack, so that the limit plate drives the left clamping plate and the right clamping plate to slide in the second sliding groove, thereby achieving the effect of slight propulsion. When slightly rotating, the rotating knob can be twisted, and the output shaft of the rotating knob drives the rotating half gear to rotate in the rotating inner groove through the second transmission gear. The total transmission ratio is 10:1, that is, the rotating knob rotates 45°, and the rotating half gear rotates 4.5°, which greatly reduces the control difficulty of slight rotation.

[0030] 2. By setting the propulsion control component and the rotation control component together on the left side, it is convenient for doctors to operate and avoid running the propulsion control component and the rotation control component at the same time, which may cause postoperative pain or other risks of nerve damage. After slight propulsion or slight rotation, observe the cerebrospinal fluid outflow and cerebrospinal fluid pressure again until the cerebrospinal fluid flows out normally. Use the drip test tube on the test tube base to perform cerebrospinal fluid sampling. If the cerebrospinal fluid pressure continues to be abnormal, stop further extraction of cerebrospinal fluid to avoid potential brain herniation or other serious complications. Further evaluation of the patient's overall condition is required.

[0031] 3. Draw a puncture mark point at the designated puncture position of the human model, lay medical gauze, and use a medical bandage to wrap around the waist of the human model to tie the support frame to the outside of the medical gauze. Use the threaded telescopic rod to adjust the support rod to a suitable depth position. At this time, the adjustment mechanism is in the initial state, the left sliding block and the right sliding block are respectively at the leftmost and rightmost sides of the support rod, and the left sliding block and the right sliding block can be slid through the first sliding groove to achieve the effect of making the support frame follow the patient's movements, greatly reducing the negative impact of the patient's movements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0033] Figure 2 It is a structural schematic diagram of the support assembly of the present invention;

[0034] Figure 3 It is a front view of the structure of the support assembly of the present invention;

[0035] Figure 4It is a schematic diagram of the initial structure of the regulating mechanism of the present invention;

[0036] Figure 5 For the present invention Figure 4 The structural diagram of the enlarged part at A in the middle;

[0037] Figure 6 It is an exploded view of the structure of the puncture assembly of the present invention;

[0038] Figure 7 It is a structural schematic diagram of the regulating mechanism of the present invention;

[0039] Figure 8 It is a structural schematic diagram of the left sliding block of the present invention;

[0040] Fig. 9 It is a cross-sectional schematic diagram of a propulsion control assembly of the present invention;

[0041] Fig.10 It is a schematic diagram of the structure of the push gear of the present invention;

[0042] Fig.11 It is a schematic diagram of the motion state of the push gear of the present invention;

[0043] Fig.12 It is a structural schematic diagram of the rotary knob of the present invention;

[0044] Fig.13 It is a cross-sectional schematic diagram of the rotation control assembly of the present invention;

[0045] Fig.14 It is an exploded view of the structure of the rotation control assembly of the present invention;

[0046] Fig.15 It is a schematic diagram of the motion state of the rotating half gear of the present invention.

[0047] In the figure:

[0048] 1. Human body model; 2. Support assembly; 21. Medical gauze; 22. Medical bandage; 23. Support frame; 24. Threaded telescopic rod; 25. Support rod; 26. First sliding groove; 27. Puncture mark point; 3. Adjustment mechanism; 31. Left sliding block; 32. Right sliding block; 33. Propulsion control assembly; 331. Propulsion knob; 332. First transmission gear; 333. First reduction gear; 334. Second reduction gear; 335. Reduction toothed belt; 336. Driven gear; 337. Driven shaft; 34. Rotation control assembly; 341, rotation knob; 342, second transmission gear; 343, rotation half gear; 344, rotation inner groove; 345, clamping block; 35, left clamping plate; 36, push limit assembly; 361, limit plate; 362, second sliding groove; 363, protective cover; 364, push gear; 365, rack; 37, right clamping plate; 38, test tube base; 39, drip test tube; 4, puncture assembly; 41, puncture needle tube; 42, clamping groove; 43, puncture needle hole; 44, puncture needle core. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0050] Example 1, reference Figure 1 - Fig.15 , which is the first embodiment of the present invention, provides a sampling device for cerebrospinal fluid testing, including a human body model 1, a support component 2 fixedly mounted on the outer wall of the human body model 1, an adjustment mechanism 3 movably mounted on the inner wall of the support component 2, and a puncture component 4 arranged between the human body model 1 and the adjustment mechanism 3, the adjustment mechanism 3 includes a left sliding block 31 and a right sliding block 32 slidably connected to the inner wall of the support component 2, a propulsion control component 33 is arranged inside the left sliding block 31, two pushing limit components 36 are slidably connected between the left sliding block 31 and the right sliding block 32, a left clamping plate 35 and a right clamping plate 37 are fixedly connected between the outer walls of the two pushing limit components 36, and a rotation control component 34 is arranged inside the left clamping plate 35.

[0051] Reference Fig.12 - Fig.15 The rotation control assembly 34 includes a rotation knob 341 rotatably connected to the outer wall of the left clamping plate 35, a second transmission gear 342 sleeved on the output shaft of the rotation knob 341, a rotation half gear 343 meshing with the second transmission gear 342, and a rotation inner groove 344 opened inside the left clamping plate 35 and the right clamping plate 37. The outer wall of the rotation half gear 343 is rotatably connected to the inner wall of the rotation inner groove 344, and the inner wall of the rotation half gear 343 is fixedly connected with a clamping block 345.

[0052] Specifically, the adjustment mechanism 3 is fixed on the human body model 1 through the support component 2, and the adjustment mechanism 3 is divided into a left sliding block 31 and a right sliding block 32. The inner wall of the left sliding block 31 is provided with a propulsion control component 33, and two pushing limit components 36 are connected between the left sliding block 31 and the right sliding block 32. The outer walls of the two pushing limit components 36 are fixedly connected with a left clamping plate 35 and a right clamping plate 37, and the left clamping plate 35 and the right clamping plate 37 are both provided with a rotating inner groove 344 inside, and a rotating half gear 343 is rotated on the inner wall of the rotating inner groove 344, and the rotating half gear 343 is driven to rotate by the second transmission gear 342, and the second transmission gear 342 is controlled by a rotating knob 341, and the rotating knob 341 is arranged on the outer side of the left clamping plate 35.

[0053] By arranging the propulsion control component 33 and the rotation control component 34 together on the left side, it is convenient for the doctor to operate and avoid the risk of postoperative pain or other nerve damage caused by running the propulsion control component 33 and the rotation control component 34 at the same time. When rotating slightly, the rotating knob 341 can be twisted, and the output shaft of the rotating knob 341 drives the rotating half gear 343 to rotate in the rotating inner groove 344 through the second transmission gear 342. The total transmission ratio is 10:1, that is, the rotating knob 341 rotates 45°, and the rotating half gear 343 rotates 4.5°, which greatly reduces the difficulty of controlling slight rotation.

[0054] Reference Figure 8 - Fig.12 The pushing and limiting assembly 36 includes two limiting plates 361 respectively slidably connected to the inner walls of the left sliding block 31 and the right sliding block 32, two second sliding grooves 362 respectively opened on the inner walls of the left sliding block 31 and the right sliding block 32, a protective cover 363 fixedly installed on the outer wall of the left limiting plate 361, two racks 365 fixedly connected to the inner walls of the two limiting plates 361, and a pushing gear 364 meshing with the teeth of the two racks 365. The outer walls of the two limiting plates 361 are respectively slidably connected to the inner walls of the two second sliding grooves 362.

[0055] Specifically, a second sliding groove 362 is provided inside the left sliding block 31 and the right sliding block 32. The inner wall of the second sliding groove 362 is slidably connected to a limiting plate 361, and a rack 365 is fixed on the limiting plate 361. After the two racks 365 are combined, a pushing gear 364 rolls on the surface thereof and is protected by a protective cover 363.

[0056] By running the propulsion control component 33, the propulsion gear 364 is driven to rotate on the rack 365, so that the limit plate 361 drives the left clamping plate 35 and the right clamping plate 37 to slide in the second sliding groove 362, thereby achieving a slight propulsion effect, and the limit plate 361 is used to fix the left clamping plate 35 and the right clamping plate 37, so that the left clamping plate 35 and the right clamping plate 37 can be pushed forward or withdrawn synchronously.

[0057] Reference Fig. 9 - Fig.11 The propulsion control component 33 includes two driven shafts 337 fixedly connected to the inner walls of the two pushing gears 364 respectively, the two ends of the driven shaft 337 are movably connected to the inner walls of the left sliding block 31 and the right sliding block 32 respectively, the outer wall of the driven shaft 337 is fixedly connected with a driven gear 336, and the two driven gears 336 are both arranged inside the left sliding block 31, the propulsion control component 33 also includes a propulsion knob 331 rotatably connected to the outer wall of the left sliding block 31, a first transmission gear 332 sleeved on the output shaft of the propulsion knob 331, a first reduction gear 333 meshing with the first transmission gear 332, and a second reduction gear 334 meshing with the first reduction gear 333, and two reduction toothed belts 335 are respectively connected to the first reduction gear 333 and the second reduction gear 334 with the two driven gears 336.

[0058] Specifically, the pushing gear 364 is controlled by the driven shaft 337, and the driven shaft 337 is driven to rotate by the driven gear 336. The driven gear 336 is driven and decelerated by the first reduction gear 333 and the second reduction gear 334 via the reduction belt 335. The first reduction gear 333 and the second reduction gear 334 are meshed with each other and rotate in opposite directions. The first reduction gear 333 is controlled to rotate by the pushing knob 331 via the first transmission gear 332. The pushing knob 331 is set on the outer wall of the left sliding block 31.

[0059] By twisting the push knob 331, the output shaft of the push knob 331 drives the first reduction gear 333 and the second reduction gear 334 to rotate relatively at a reduced speed via the first transmission gear 332, and then drives the driven shaft 337 to further rotate at a reduced speed via the reduction tooth belt 335 and the driven gear 336. The total transmission ratio is 20:1, that is, the push knob 331 rotates one circle, and the driven shaft 337 rotates 1 / 20 circle, which greatly reduces the difficulty of controlling slight propulsion. The driven shaft 337 then drives the pushing gear 364 to rotate on the rack 365, so that the limit plate 361 drives the left clamping plate 35 and the right clamping plate 37 to slide in the second sliding groove 362, thereby achieving the effect of slight propulsion.

[0060] Reference Figure 5 - Figure 6The puncture assembly 4 includes a puncture needle tube 41 clamped between the left clamping plate 35 and the right clamping plate 37, a plurality of clamping grooves 42 opened on the outer wall of the puncture needle tube 41, a puncture needle hole 43 opened on the inner wall of the puncture needle tube 41, and a puncture needle core 44 slidably connected to the inner wall of the puncture needle hole 43, and the inner wall of any clamping groove 42 can be clamped with the outer wall of the clamping block 345.

[0061] Specifically, the puncture assembly 4 consists of a puncture needle tube 41, a puncture needle hole 43 and a puncture needle core 44. The puncture needle tube 41 is used for puncture, the puncture needle hole 43 is used to extract cerebrospinal fluid, and the puncture needle core 44 is used to block the puncture needle hole 43. The outer wall of the puncture needle tube 41 is provided with a plurality of clamping grooves 42, and any one of the clamping grooves 42 can be clamped with the clamping block 345.

[0062] By clamping the clamping block 345 with the clamping groove 42 closest to the puncture needle tube 41, the adjustment mechanism 3 replaces the puncture needle tube 41 for adjustment. When sampling, pull out the puncture needle core 44 in the puncture needle tube 41. If cerebrospinal fluid is seen flowing out of the puncture needle hole 43, it can be confirmed that the position of the puncture needle tube 41 is correct, and then a pressure gauge is connected to the puncture needle hole 43 for pressure detection.

[0063] During use, the doctor holds the puncture needle tube 41 tightly and vertically pierces the skin, and gradually penetrates deeper. When a "pop" sound is heard, the needle passes through the dura mater and enters the subarachnoid space. At this time, the left sliding block 31 and the right sliding block 32 slide oppositely, and the clamping block 345 on the rotating half gear 343 is clamped with the nearest clamping groove 42 on the puncture needle tube 41, and the left clamping plate 35 and the right clamping plate 37 are combined together. The puncture needle core 44 in the puncture needle tube 41 is pulled out. If cerebrospinal fluid is seen flowing out of the puncture needle tube, When the cerebrospinal fluid flows out of the needle hole 43, it can be confirmed that the position of the puncture needle tube 41 is correct, and then a pressure gauge is connected to the puncture needle hole 43 to perform pressure detection; if the cerebrospinal fluid does not flow out normally or the cerebrospinal fluid pressure is abnormal, the cerebrospinal fluid outflow and cerebrospinal fluid pressure detection are observed after slightly advancing or rotating the puncture needle tube 41. When slightly advancing, the advancement knob 331 can be twisted, and the output shaft of the advancement knob 331 drives the first reduction gear 333 and the second reduction gear 334 to rotate relatively at a reduced speed through the first transmission gear 332. , and then the reduction gear belt 335 and the driven gear 336 drive the driven shaft 337 to further reduce the rotation speed, and the total transmission ratio is 20:1, that is, the driving knob 331 rotates one circle, and the driven shaft 337 rotates 1 / 20 circle, which greatly reduces the difficulty of controlling slight advancement. The driven shaft 337 then drives the pushing gear 364 to rotate on the rack 365, so that the limit plate 361 drives the left clamping plate 35 and the right clamping plate 37 to slide in the second sliding groove 362, thereby achieving the effect of slight advancement. During micro-rotation, the rotating knob 341 can be twisted, and the output shaft of the rotating knob 341 drives the rotating half gear 343 to rotate in the rotating inner groove 344 through the second transmission gear 342. The total transmission ratio is 10:1, that is, the rotating knob 341 rotates 45°, and the rotating half gear 343 rotates 4.5°, which greatly reduces the difficulty of controlling slight rotation, and the pushing knob 331 and the rotating knob 341 are controlled separately, avoiding the risk of rotating the puncture needle while pushing, causing postoperative pain or other nerve damage.

[0064] Example 2, reference Figure 1 - Figure 7 , which is the second embodiment of the present invention, and which is different from the first embodiment in that: Figure 5 The support component 2 includes a puncture marking point 27 fixedly connected to the outer wall of the human body model 1 , and the puncture component 4 is slidably connected to the inside of the human body model 1 by penetrating the puncture marking point 27 .

[0065] By setting the puncture mark point 27, the doctor can plan in advance the puncture position of the puncture needle tube 41 during lumbar puncture. The doctor wears sterile gloves, holds the puncture needle tube 41 tightly, and vertically pierces the skin along the puncture mark point 27 and gradually penetrates deeper. When a "pop" sound is heard, it indicates that the needle has passed through the dura mater and entered the subarachnoid space.

[0066] Reference Figure 2The support assembly 2 also includes a medical gauze 21 laid on the outer wall of the human body model 1, a medical bandage 22 wrapped around the outer wall of the human body model 1, and a support frame 23 fixedly connected between the two ends of the medical bandage 22. The outer wall of the support frame 23 overlaps the outer wall of the medical gauze 21. The outer wall of the support frame 23 is rotatably connected with a plurality of threaded telescopic rods 24. Two support rods 25 are respectively threadedly connected between the outer walls of the plurality of threaded telescopic rods 24. The inner walls of the two support rods 25 are each provided with two first sliding grooves 26. The inner walls of the plurality of first sliding grooves 26 are respectively slidably connected with the outer walls of the left sliding block 31 and the right sliding block 32.

[0067] Specifically, the medical gauze 21 is laid on the outside of the human body model 1, and the medical bandage 22 is used to wrap around the human body to tie the support frame 23 to the outside of the medical gauze 21. The outer wall of the support frame 23 is fixedly connected with a plurality of threaded telescopic rods 24, and the depth of the support rod 25 can be adjusted by the threaded telescopic rods 24. The inner wall of the support rod 25 is provided with a plurality of first sliding grooves 26 for the sliding of the left sliding block 31 and the right sliding block 32.

[0068] By laying medical gauze 21 on the outside of the human model 1, and using a medical bandage 22 to wrap around the waist of the human model 1 to tie the support frame 23 to the outside of the medical gauze 21, the support rod 25 is adjusted to a suitable depth position through the threaded telescopic rod 24. At this time, the adjustment mechanism 3 is in the initial state, the left sliding block 31 and the right sliding block 32 are respectively at the leftmost and rightmost positions of the support rod 25, and the left sliding block 31 and the right sliding block 32 can be slid through the first sliding groove 26.

[0069] Reference Figure 7 The outer wall of the right sliding block 32 is fixedly connected with a test tube base 38 , and a plurality of dripping test tubes 39 are placed on the inner wall of the test tube base 38 .

[0070] During use, disinfection and local anesthesia are first performed, and a puncture mark 27 is drawn at the designated puncture position of the human model 1, and then the medical gauze 21 is laid, and the medical bandage 22 is used to wrap around the waist of the human model 1 to tie the support frame 23 to the outside of the medical gauze 21, and the support rod 25 is adjusted to a suitable depth position through the threaded telescopic rod 24. At this time, the adjustment mechanism 3 is in the initial state, and the left sliding block 31 and the right sliding block 32 are respectively at the leftmost and rightmost positions of the support rod 25, and the left sliding block 31 and the right sliding block 32 can be slid through the first sliding groove 26. Then the doctor puts on sterile gloves, holds the puncture needle tube 41 tightly, vertically pierces the skin along the puncture mark point 27, and gradually penetrates deeper. When a "pop" sound is heard, it indicates that the needle has passed through the dura mater and entered the subarachnoid space. After slight advancement or slight rotation, observe the cerebrospinal fluid outflow and cerebrospinal fluid pressure detection again until the cerebrospinal fluid flows out normally. Use the drip test tube 39 on the test tube base 38 to perform cerebrospinal fluid sampling. If the cerebrospinal fluid pressure continues to be abnormal, stop further extraction of cerebrospinal fluid to avoid potential brain herniation or other serious complications. The overall condition of the patient needs to be further evaluated. The remaining structure is the same as that of Example 1.

[0071] Working principle of the present invention:

[0072] During the operation, disinfection and local anesthesia are first performed, and a puncture mark point 27 is drawn at the designated puncture position of the human model 1, and then medical gauze 21 is laid, and a medical bandage 22 is used to wrap around the waist of the human model 1 to tie the support frame 23 to the outside of the medical gauze 21, and the support rod 25 is adjusted to a suitable depth position through the threaded telescopic rod 24. At this time, the adjustment mechanism 3 is in the initial state, the left sliding block 31 and the right sliding block 32 are respectively at the leftmost and rightmost positions of the support rod 25, and the left sliding block 31 and the right sliding block 32 can be slid through the first sliding groove 26.

[0073] Then the doctor puts on sterile gloves, holds the puncture needle tube 41 tightly, and vertically pierces the skin along the puncture mark point 27, and gradually penetrates deeper. When a "pop" sound is heard, the needle passes through the dura mater and enters the subarachnoid space. At this time, the left sliding block 31 and the right sliding block 32 slide oppositely, and the clamping block 345 on the rotating half gear 343 is clamped with the nearest clamping groove 42 on the puncture needle tube 41, and the left clamping plate 35 and the right clamping plate 37 are merged together.

[0074] Pull out the puncture needle core 44 in the puncture needle tube 41. If cerebrospinal fluid is seen flowing out from the puncture needle hole 43, it can be confirmed that the puncture needle tube 41 is positioned correctly, and then a pressure gauge is connected to the puncture needle hole 43 for pressure detection. If the cerebrospinal fluid does not flow out normally or the cerebrospinal fluid pressure is abnormal, slightly push or rotate the puncture needle tube 41 and then observe the cerebrospinal fluid outflow and cerebrospinal fluid pressure.

[0075] When slightly advancing, the advancing knob 331 can be twisted, and the output shaft of the advancing knob 331 drives the first reduction gear 333 and the second reduction gear 334 to rotate relatively at a reduced speed through the first transmission gear 332, and then drives the driven shaft 337 to further rotate at a reduced speed through the reduction tooth belt 335 and the driven gear 336. The total transmission ratio is 20:1, that is, the advancing knob 331 rotates one circle, and the driven shaft 337 rotates 1 / 20 circle, which greatly reduces the difficulty of controlling slight advancement. The driven shaft 337 then drives the pushing gear 364 to rotate on the rack 365, so that the limit plate 361 drives the left clamping plate 35 and the right clamping plate 37 to slide in the second sliding groove 362, thereby achieving the effect of slight advancement.

[0076] When rotating slightly, the rotating knob 341 can be twisted, and the output shaft of the rotating knob 341 drives the rotating half gear 343 to rotate in the rotating inner groove 344 through the second transmission gear 342. The total transmission ratio is 10:1, that is, the rotating knob 341 rotates 45°, and the rotating half gear 343 rotates 4.5°, which greatly reduces the difficulty of controlling slight rotation, and the pushing knob 331 and the rotating knob 341 are controlled separately, avoiding the risk of rotating the puncture needle while pushing, causing postoperative pain or other nerve damage.

[0077] After slight advancement or slight rotation, observe the cerebrospinal fluid outflow and cerebrospinal fluid pressure again until the cerebrospinal fluid flows out normally. Use the drip test tube 39 on the test tube base 38 to perform cerebrospinal fluid sampling. If the cerebrospinal fluid pressure continues to be abnormal, stop further extraction of cerebrospinal fluid to avoid potential brain herniation or other serious complications. The patient's overall condition needs to be further evaluated.

[0078] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A sampling device for cerebrospinal fluid testing, comprising a human body model (1), a support assembly (2) fixedly mounted on the outer wall of the human body model (1), an adjustment mechanism (3) movably mounted on the inner wall of the support assembly (2), and a puncture assembly (4) arranged between the human body model (1) and the adjustment mechanism (3), characterized in that: The adjustment mechanism (3) comprises a left sliding block (31) and a right sliding block (32) which are slidably connected to the inner wall of the support assembly (2); a propulsion control assembly (33) is arranged inside the left sliding block (31); two pushing limit assemblies (36) are slidably connected between the left sliding block (31) and the right sliding block (32); a left clamping plate (35) and a right clamping plate (37) are fixedly connected between the outer walls of the two pushing limit assemblies (36); and a rotation control assembly (34) is arranged inside the left clamping plate (35); The rotation control assembly (34) comprises a rotation knob (341) rotatably connected to the outer wall of the left clamping plate (35), a second transmission gear (342) sleeved on the output shaft of the rotation knob (341), a rotation half gear (343) meshing with the teeth of the second transmission gear (342), and a rotation inner groove (344) provided inside the left clamping plate (35) and the right clamping plate (37), the outer wall of the rotation half gear (343) being rotatably connected to the inner wall of the rotation inner groove (344), and the inner wall of the rotation half gear (343) being fixedly connected to a clamping block (345).

2. The cerebrospinal fluid sampling device according to claim 1, characterized in that: The pushing and limiting assembly (36) comprises two limiting plates (361) respectively slidably connected to the inner walls of the left sliding block (31) and the right sliding block (32), two second sliding grooves (362) respectively opened on the inner walls of the left sliding block (31) and the right sliding block (32), a protective cover (363) fixedly mounted on the outer wall of the left limiting plate (361), two racks (365) fixedly connected to the inner walls of the two limiting plates (361), and a pushing gear (364) meshed with the teeth of the two racks (365), and the outer walls of the two limiting plates (361) are respectively slidably connected to the inner walls of the two second sliding grooves (362).

3. The cerebrospinal fluid testing sampling device according to claim 2, characterized in that: The propulsion control assembly (33) comprises two driven shafts (337) respectively fixedly connected to the inner walls of the two pushing gears (364), the two ends of the driven shaft (337) are respectively movably connected to the inner walls of the left sliding block (31) and the right sliding block (32), the outer wall of the driven shaft (337) is fixedly connected to a driven gear (336), and the two driven gears (336) are both arranged inside the left sliding block (31).

4. The sampling device for cerebrospinal fluid testing according to claim 3, characterized in that: The propulsion control assembly (33) further comprises a propulsion knob (331) rotatably connected to the outer wall of the left sliding block (31), a first transmission gear (332) sleeved on the output shaft of the propulsion knob (331), a first reduction gear (333) meshing with the teeth of the first transmission gear (332), and a second reduction gear (334) meshing with the teeth of the first reduction gear (333), wherein the first reduction gear (333) and the second reduction gear (334) are respectively connected to two driven gears (336) via two reduction toothed belts (335).

5. The cerebrospinal fluid testing sampling device according to claim 4, characterized in that: The puncture assembly (4) comprises a puncture needle tube (41) clamped between a left clamping plate (35) and a right clamping plate (37), a plurality of clamping grooves (42) provided on the outer wall of the puncture needle tube (41), a puncture needle hole (43) provided on the inner wall of the puncture needle tube (41), and a puncture needle core (44) slidably connected to the inner wall of the puncture needle hole (43), and the inner wall of any one of the clamping grooves (42) can be clamped with the outer wall of the clamping block (345).

6. The sampling device for cerebrospinal fluid testing according to claim 1, characterized in that: The support component (2) comprises a puncture mark point (27) fixedly connected to the outer wall of the human body model (1), and the puncture component (4) is slidably connected to the interior of the human body model (1) by penetrating the puncture mark point (27).

7. The sampling device for cerebrospinal fluid testing according to claim 6, characterized in that: The support assembly (2) further comprises a medical gauze (21) laid on the outer wall of the human body model (1), a medical bandage (22) wrapped around the outer wall of the human body model (1), and a support frame (23) fixedly connected between the two ends of the medical bandage (22), wherein the outer wall of the support frame (23) overlaps the outer wall of the medical gauze (21).

8. The sampling device for cerebrospinal fluid testing according to claim 7, characterized in that: The outer wall of the support frame (23) is rotatably connected to a plurality of threaded telescopic rods (24), and two support rods (25) are respectively threadedly connected between the outer walls of the plurality of threaded telescopic rods (24).

9. The sampling device for cerebrospinal fluid testing according to claim 8, characterized in that: The inner walls of the two support rods (25) are each provided with two first sliding grooves (26), and the inner walls of the plurality of first sliding grooves (26) are respectively slidably connected to the outer walls of the left sliding block (31) and the right sliding block (32).

10. The sampling device for cerebrospinal fluid testing according to claim 1, characterized in that: The outer wall of the right sliding block (32) is fixedly connected to a test tube base (38), and a plurality of dripping test tubes (39) are placed on the inner wall of the test tube base (38).

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