Sample extraction tool
By designing a sample extraction tool, using the movement of the control lever to achieve multiple operations, the cerebrospinal fluid extraction process is simplified, the problem of cumbersome and wasteful operation is solved, and safety and patient comfort is improved.
Patent Information
- Application Number
- CN202510275818.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-10
- Publication Date
- 2025-05-09
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The current cerebrospinal fluid extraction operation is complicated, which can easily cause cerebrospinal fluid waste and poses a safety hazard for needle stab injuries.
A sample extraction tool is designed to realize pressure measurement, sampling, suction and other operations through the up and down movement of the control lever. There is no need to replace the instrument in the middle, simplifying the operation steps, and the design of the baffle and needle core is used to prevent needle stab injuries.
It simplifies operational steps, improves work efficiency, reduces unwarranted waste of cerebrospinal fluid, reduces patient discomfort, improves patient comfort, and reduces the occurrence of complications.
Smart Images
Figure CN119949896A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of sample extraction equipment, in particular to a sample extraction tool. Background Art
[0002] Cerebrospinal fluid examination can detect diseases such as encephalitis, meningitis, brain tumors, cerebral hemorrhage, and cerebral infarction. The current method of extracting cerebrospinal fluid is to have the patient lie on his side without an occipital pillow, hold his knees with both hands, and keep his knees as close to the abdomen as possible. Sometimes, family members or other medical staff are needed to assist in positioning and fixing the body. After disinfection and anesthesia, the puncture needle tip is tilted upward and the needle body is kept horizontal and inserted into the L4-5 or L5-S1 intervertebral space. When the needle passes through the supraspinous ligament, interspinous ligament and dura mater, there is a feeling of sudden disappearance of resistance (the needle insertion depth is generally 4-5cm for adults and 2-4cm for children, depending on age and body shape). The needle has entered the subarachnoid space. Turn the needle about 90° so that the inclined surface of the needle faces the head. Slowly pull out the needle core. Cerebrospinal fluid can be seen flowing out, which proves that the puncture is successful. Then relax the patient's limbs, take the pressure gauge, extract the needle core, connect the pressure gauge to the puncture needle, and measure the cerebrospinal fluid pressure. After the pressure measurement is completed, remove the pressure gauge and insert the needle core into the puncture needle. Then pour the cerebrospinal fluid in the pressure gauge into the test tube. Then put the test tube under the puncture needle, and then pull out the needle core again to make the cerebrospinal fluid flow into the test tube. When an appropriate amount of cerebrospinal fluid is obtained or the test tube needs to be replaced, the needle core needs to be pulled out again. Finally, pull out the puncture needle after sampling. In addition, if the cerebrospinal fluid cannot drip out due to certain lesions (such as too high protein content or too low cerebrospinal fluid pressure), the syringe can be connected to the puncture needle after the needle core is pulled out, and then the cerebrospinal fluid can be extracted by gently aspirating.
[0003] The following problems exist during the operation: 1. There are many items used. During the specific operation, one hand needs to stabilize the puncture needle while pulling out the needle core and connecting the pressure measuring tube to the puncture needle, or one hand needs to stabilize the puncture needle while pulling out the needle core and holding the test tube to collect cerebrospinal fluid. The operation is cumbersome and the whole process is a great test of the skills of medical staff. Mistakes will be made if they are not careful. Sometimes two medical staff will perform the operation, but this will undoubtedly cause a waste of personnel; 2. The needle core needs to be pulled out and inserted many times. Frequent pulling out and inserting can easily increase the risk of needle stick injury during insertion. It is very easy to cause injury to medical staff due to operating errors or hand shaking, which poses a safety hazard. In addition, since small epidermal emboli may be brought to the subarachnoid space during puncture without a needle core, and some nerve root fibers may be inhaled when the needle core is withdrawn, causing pain, the needle core must be ensured to be located in the puncture needle during insertion and withdrawal. The insertion of the needle core into the puncture needle can also prevent the leakage of cerebrospinal fluid and act as a switch. In this way, this step cannot be omitted, and the needle core can only be inserted and removed at high risk. 3. Excessive discharge of cerebrospinal fluid will cause the patient's intracranial pressure to decrease, causing symptoms such as headache and nausea, thereby causing discomfort to the patient. When the needle core is pulled out, cerebrospinal fluid will always drip from the puncture needle onto the bed sheet, thereby wasting more cerebrospinal fluid and increasing the probability of discomfort for the patient. Summary of the invention
[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a sample extraction tool, which effectively solves the problem of cumbersome cerebrospinal fluid extraction operation and easy waste of cerebrospinal fluid.
[0005] The technical solution is as follows: the present invention comprises a main body box, a sliding sleeve is slidably connected to the right side of the upper end of the main body box, a groove with an opening facing right is provided in the sliding sleeve, a control rod in the up-down direction is slidably connected in the sliding sleeve, three plug-in balls distributed in the up-down direction and movable left and right are provided on the control rod, and the plug-in balls can be inserted into the groove, a transparent box is fixed on the left side of the upper end of the main body box, a needle sleeve with left and right axial directions is provided on the left end of the transparent box, an L-shaped drainage pipe with a lower front and a higher rear inclined shape is fixed on the left and right sides of the lower end of the transparent box, an inverted L-shaped baffle plate which moves left and right with the up-down movement of the control rod is provided in the transparent box, the baffle plate can block the upper end opening of the drainage pipe, a leakage hole which runs through from top to bottom and can be connected with the drainage pipe is provided on the baffle plate, a needle core which can be inserted into the needle sleeve is fixed on the baffle plate, the inner diameter of the left end of the needle sleeve is smaller than the inner diameter of the right side thereof, the outer diameter of the needle core is equal to the inner diameter of the left end of the needle sleeve, and a through hole with up-down axial directions is provided on the upper end of the transparent box; A pressure measuring box is provided at the upper end of the transparent box, and a through hole is provided on the pressure measuring box, which runs through the upper and lower parts and is coaxial with the through hole. A pressure measuring tube coaxial with the through hole is fixed on the upper end of the pressure measuring box, and a left-right axial suction cylinder is fixed on the pressure measuring box. The left end surface of the suction cylinder is flush with the side wall of the through hole. A piston that can move left and right with the sliding sleeve is provided in the suction cylinder. When the plug ball located in the middle is inserted into the groove, the sliding sleeve can move left and right. When the sliding sleeve moves to the right, the baffle blocks the two drainage pipes, and the through hole is connected with the outside world through the needle sleeve. When the sliding sleeve moves to the left, the needle core blocks the needle sleeve, and the needle sleeve is connected with the drainage pipe on the left through the leakage hole, and the drainage pipe on the right is connected with the through hole.
[0006] The beneficial effects of the present invention are as follows: medical staff can perform various operations such as pressure measurement, sampling, and suction by simply manipulating the up and down and left and right movements of the control lever, without having to change instruments back and forth in the middle, thereby simplifying the operating steps, improving work efficiency, and reducing the unnecessary waste of cerebrospinal fluid, thereby reducing the patient's discomfort, improving the patient's comfort, and reducing the occurrence of complications. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is an axonometric view of the present invention.
[0008] Figure 2 It is a cutaway main axonometric view of the present invention.
[0009] Figure 3 It is a cutaway front view of the present invention.
[0010] Figure 4 It is a full-section main axonometric drawing of the present invention.
[0011] Figure 5 The present invention Figure 4 A is an enlarged view of the middle image.
[0012] Figure 6 It is a stepped cutaway top axonometric view of the present invention.
[0013] Figure 7 The present invention Figure 4 Enlarged view of B.
[0014] Figure 8 It is an axonometric view of the needle sleeve in the present invention.
[0015] Fig. 9 It is an axonometric view of the pressure measuring box in the present invention.
[0016] Fig.10 It is an axonometric view of the main box in the present invention. DETAILED DESCRIPTION
[0017] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.
[0018] Depend on Figures 1 to 10 The invention comprises a main box 1, a sliding sleeve 2 is slidably connected to the right side of the upper end of the main box 1, a groove opening to the right is provided in the sliding sleeve 2, a control rod 3 in the up-down direction is slidably connected in the sliding sleeve 2, three plug balls 4 distributed in the up-down direction and movable left-right are provided on the control rod 3, and the plug balls 4 can be inserted into the groove, a transparent box 5 is fixed on the left side of the upper end of the main box 1, a needle sleeve 6 is provided on the left end of the transparent box 5, and L-shaped needle sleeves are fixed on the left and right sides of the lower end of the transparent box 5, and the lower side is low in front and low in back. A highly inclined discharge tube 7, a baffle plate 8 in an inverted L shape is provided in the transparent box 5 and moves left and right with the up and down movement of the control rod 3, the baffle plate 8 can cover the upper end opening of the discharge tube 7, a leakage hole 9 is provided on the baffle plate 8 and is connected to the discharge tube 7, a needle core 10 that can be inserted into the needle sleeve 6 is fixed on the baffle plate 8, the inner diameter of the left end of the needle sleeve 6 is smaller than the inner diameter of the right end thereof, and the outer diameter of the needle core 10 is equal to the inner diameter of the left end of the needle sleeve 6, and a through hole 11 is provided on the upper end of the transparent box 5 in the upper and lower axial directions; A pressure measuring box 12 is provided at the upper end of the transparent box 5. A through hole 13 is provided on the pressure measuring box 12, which runs through from top to bottom and is coaxial with the through hole 11. A pressure measuring tube 14 coaxial with the through hole 13 is fixed to the upper end of the pressure measuring box 12. A left-right axial suction cylinder 15 is fixed on the pressure measuring box 12. The left end surface of the suction cylinder 15 is flush with the side wall of the through hole 13. A piston 16 that can move left and right with the sliding sleeve 2 is provided in the suction cylinder 15. When the plug ball 4 located in the middle is inserted into the groove, the sliding sleeve 2 can move left and right. When the sliding sleeve 2 moves to the right, the baffle 8 blocks the two drainage pipes 7, and the through hole 11 is connected to the outside through the needle sleeve 6. When the sliding sleeve 2 moves to the left, the needle core 10 blocks the needle sleeve 6, and the needle sleeve 6 is connected to the drainage pipe 7 on the left side through the leakage hole 9, and the drainage pipe 7 on the right side is connected to the through hole 11.
[0019] In order to enable the plug ball 4 to move left and right, the control rod 3 is provided with three cylindrical grooves corresponding to the plug balls 4 and opening to the left. The plug ball 4 is located in the corresponding cylindrical grooves, and the right end of the plug ball 4 is connected to the right wall of the cylindrical groove via a compression spring.
[0020] In order to make the baffle 8 move left and right as the control rod 3 moves up and down, a slide plate 17 is slidably connected in the main box 1, and a push groove 18 is opened on the slide plate 17. The push groove 18 includes three vertical grooves in the up and down directions and two oblique grooves with the left lower and the right higher. The three vertical grooves and the two oblique grooves are staggered, and the lower ends of the vertical grooves are connected with the upper ends of the adjacent vertical grooves through the oblique grooves. A sliding rod 19 in the left and right directions is fixed to the lower end of the control rod 3. The sliding rod 19 passes through the slide plate 17 and is slidably connected to the slide plate 17. A pull rod 20 in an inverted L shape located above the main box 1 is fixed to the right end of the baffle 8. The right end of the pull rod 20 passes through the transparent box 5, and the lower end of the pull rod 20 is inserted into the main box 1 and is slidably connected to the main box 1. A push column 21 inserted into the push groove 18 is fixed to the lower end of the pull rod 20, and the baffle 8 is slidably connected to the transparent box 5.
[0021] In order to enable the piston 16 to move left and right with the sleeve 2, a connecting box 22 with an upward opening is fixed to the rear end of the sleeve 2, a connecting rod is fixed to the right end of the piston 16, and a connecting block that can be inserted into the connecting box 22 is fixed to the right end of the connecting rod. The left end face of the piston 16 is flush with the inner wall of the through hole 13, and the piston 16 is slidably connected to the suction cylinder 15.
[0022] In order to enable the sliding sleeve 2 to move left and right when the plug ball 4 located in the middle is inserted into the groove, when the sliding sleeve 2 moves to the right, the baffle 8 blocks the two drainage pipes 7, and the through hole 11 is connected to the outside through the needle sleeve 6. When the sliding sleeve 2 moves to the left, the needle core 10 blocks the needle sleeve 6, and the needle sleeve 6 is connected to the drainage pipe 7 on the left through the leakage hole 9, and the drainage pipe 7 on the right is connected to the through hole 11. A guide groove is provided in the main body box 1, and the guide groove includes an auxiliary groove 23 in the up and down direction, a transition groove 24 in the left and right direction, and a mouth-shaped groove 25. The lower side of the left end of the mouth-shaped groove 25 is connected to the middle part of the auxiliary groove 23 through the transition groove 24, and a guide column 26 inserted into the guide groove is fixed on the control rod 3.
[0023] In order to limit the moving direction of the guide column 26 in the guide groove, the main body box 1 is slidably connected with two blocks 27 whose front ends are inserted into the mouth-shaped groove 25 and distributed up and down. The upper block 27 is located to the right of the left corner of the upper end of the mouth-shaped groove 25 and its front end face is an inclined surface with left front and right rear. The lower block 27 is located to the left of the right corner of the lower end of the mouth-shaped groove 25 and its front end face is an inclined surface with left rear and right front. The rear end of the block 27 is connected to the main body box 1 via a spring.
[0024] In order to facilitate the collection of cerebrospinal fluid discharged from the drainage tubes 7 , a liquid collecting tube 28 which is low in front and high in the back and runs through the main box 1 is fixed at the lower ends of the two drainage tubes 7 .
[0025] In order to facilitate the piston 16 to better aspirate cerebrospinal fluid, the pressure measuring box 12 is slidably connected with an L-shaped sealing plate 29 that can cover the through hole 13. The sealing plate 29 is located above the suction cylinder 15. The sealing plate 29 is provided with a connecting hole 30 that is coaxial with the through hole 13 and passes through from top to bottom. The upper end of the sealing plate 29 passes through the pressure measuring box 12 and is slidably connected to the pressure measuring box 12. An elastic blocking column 31 that can contact the sealing plate 29 is fixed on the pressure measuring box 12.
[0026] In order to facilitate cleaning and disinfection after use, a connector 32 is fixed to the right end of the needle sleeve 6, and the connector 32 is threadedly connected to the main box 1. A clearance groove is opened at the upper end of the transparent box 5, and the pressure measuring box 12 can be inserted into the clearance groove. The front and rear sides of the pressure measuring box 12 are respectively threadedly connected with threaded knobs 33, and the threaded knob 33 is threadedly connected to the transparent box 5. Sealing rings are respectively fixed to the upper and left ends of the transparent box 5. The needle core 10 is located on the inner side of the sealing ring at the left end, and the sealing ring at the left end can contact the connector 32. The through hole 11 is located on the inner side of the sealing ring at the upper end, and the sealing ring at the upper end can contact the pressure measuring box 12.
[0027] For ease of use, a finger ring is rotatably connected to the upper end of the control rod 3 , and scale lines are fixed on the needle sleeve 6 and the pressure measuring tube 14 respectively, and the inclined surface at the needle tip of the needle sleeve 6 is perpendicular to the axis of the pressure measuring tube 14 .
[0028] When the present invention is in use, the initial state is that the connector 32 is connected to the main box 1, the needle core 10 is inserted into the needle sleeve 6, the inclined surface at the needle tip of the needle core 10 is coplanar with the inclined surface at the needle tip of the needle sleeve 6, the inclined surface at the needle tip of the needle sleeve 6 faces forward, the threaded knob 33 is connected to the transparent box 5, the through hole 13 is connected to the through hole 11, the sealing plate 29 is located on the right side of the elastic blocking column 31 and contacts the elastic blocking column 31, the connecting hole 30 is coaxial with the through hole 13, the upper end opening of the drainage pipe 7 on the left is connected to the leakage hole 9, the baffle 8 is located on the left side of the through hole 11, the through hole 11 is connected to the upper end of the drainage pipe 7 on the right, the push column 21 is located in the vertical groove at the lowermost side of the push groove 18, the push column 21 cannot move to the right, the lowermost plug ball 4 is inserted into the groove, the guide column 26 is located at the upper limit position of the auxiliary groove 23, the sliding sleeve 2 is located at the left limit position, and the connecting block is inserted into the connecting box 22; When in use, take out the sterile device, after the patient is positioned and disinfected and anesthetized, pierce the patient's skin with the needle tip of the needle sheath 6 facing upward. After feeling the sense of empty space, rotate the whole by 90 degrees so that the inclined surface of the needle tip of the needle sheath 6 faces the patient's head. At this time, the pressure measuring tube 14 is in the up and down direction. Put your finger into the finger ring and press the control rod 3 downward. The lowermost plug ball 4 gradually moves out of the groove and squeezes the compression spring. The control rod 3 drives the guide column 26 and the slide bar 19 to move downward. The slide bar 19 drives the slide plate 17 to move downward. The push column 21 gradually moves from the lowermost vertical groove to the inclined groove and moves to the right under the action of the inclined groove. The push column 21 drives the baffle 8 to move to the right through the pull rod 20. The baffle 8 drives the needle core 10 to move to the right, and the leakage hole 9 gradually staggers with the drainage pipe 7 on the left. When the plug ball 4 in the middle is inserted into the groove, stop pressing the control rod 3 downward. At this time, the guide column 26 is opposite to the transition groove 24 on the left and right, the push column 21 is located in the middle vertical groove, the baffle 8 blocks the upper ends of the two drainage tubes 7, the leakage hole 9 is located between the upper ends of the two drainage tubes 7, the through hole 11 is located on the left side of the vertical part of the baffle 8, and the needle tip of the needle core 10 is located at the larger inner diameter of the needle sleeve 6. The needle core 10 cannot block the needle sleeve 6. At this time, cerebrospinal fluid enters the transparent box 5 through the space between the needle sleeve 6 and the needle core 10. When cerebrospinal fluid is observed in the transparent box 5, it proves that the puncture site is correct and the state remains unchanged. At this time, the cerebrospinal fluid gradually flows into the transparent box 5 through the needle sleeve 6 and then enters the pressure measuring tube 14 through the through hole 11, the through hole 13, and the connecting hole 30. When the liquid level in the pressure measuring tube 14 is stable, the patient's cerebrospinal fluid pressure can be read; After the pressure measurement is completed, the test tube is taken out and placed at the lower end of the liquid collecting tube 28, and the control rod 3 is continued to be pressed downward. The guide column 26 continues to move downward along the auxiliary groove 23 to the lower limit position. The baffle 8 continues to move to the right under the action of the push column 21 and the slide plate 17. The middle plug ball 4 moves out of the groove and squeezes the compression spring. When the uppermost plug ball 4 is inserted into the groove, the control rod 3 is stopped. At this time, the guide column 26 is at the lower limit position of the auxiliary groove 23, and the push column 21 is at the uppermost position. In the upper vertical groove, the baffle 8 cannot move left and right. At this time, the vertical part of the baffle 8 is located on the right side of the through hole 11. The baffle 8 blocks the drainage tube 7 on the left side. The upper end of the drainage tube 7 on the right side is connected with the leakage hole 9. The through hole 11, the leakage hole 9, the drainage tube 7 on the right side, and the needle sleeve 6 are connected together. The cerebrospinal fluid in the human body and the cerebrospinal fluid in the pressure measuring tube 14 flow into the liquid collecting tube 28 through the leakage hole 9 and the drainage tube 7 on the right side, and then flow out of the liquid collecting tube 28 into the test tube. After taking an appropriate amount of cerebrospinal fluid, the finger ring is pulled upward, and the finger ring drives the control rod 3 to move upward, so that the lowermost plug ball 4 is inserted into the groove, and the baffle 8 moves leftward to the initial position under the action of the slide plate 17 and the push column 21. At this time, the cerebrospinal fluid remaining in the transparent box 5 and the pressure measuring tube 14 can still enter the test tube through the two drainage tubes 7, but the needle core 10 has blocked the needle sheath 6, so no new cerebrospinal fluid will enter the transparent box 5. After the cerebrospinal fluid in the transparent box 5 and the pressure measuring tube 14 is discharged, the needle sheath 6 can be separated from the patient's body normally; When cleaning, the connector 32 can be rotated to separate the connector 32 from the main box 1, and then the threaded knob 33 can be rotated to separate the threaded knob 33 from the transparent box 5, and then the corresponding cleaning and disinfection can be performed; For patients whose cerebrospinal fluid cannot drip out normally, after the insertion is completed and the middle plug ball 4 is connected to the groove, the sealing plate 29 is pulled to the left, so that the sealing plate 29 moves from the right side of the elastic blocking column 31 to the left side of the elastic blocking column 31. At this time, the connecting hole 30 is staggered with the through hole 13, and the sealing plate 29 blocks the through hole 13. The sliding sleeve 2 is pulled to the right, and the sliding sleeve 2 drives the control rod 3 to move to the right. The control rod 3 drives the guide column 26 to the right into the transition groove 24, and the sliding rod 19 moves to the right relative to the slide plate 17, and the slide plate 17 does not move, so that the through hole 11 is connected to the needle sleeve 6, but the baffle 8 blocks the state of the two drainage tubes 7, the sliding sleeve 2 drives the piston 16 to move rightward through the connecting block and the connecting rod, so that the cerebrospinal fluid is sucked into the suction cylinder 15 through the needle sleeve 6, the transparent box 5, the through hole 11, and the through hole 13, and the guide column 26 gradually enters the mouth-shaped groove 25. After the guide column 26 moves to the right for a certain distance, it contacts the inclined surface of the block 27 on the lower side, so that the block 27 moves backward to squeeze the spring. When the guide column 26 moves to the right of the block 27, the block 27 moves forward under the action of the spring to block the guide column 26, thereby preventing the guide column 26 from moving to the left; Pull the control rod 3 upward, the control rod 3 drives the slide plate 17 to move upward, so that the baffle 8 moves to the left, so that the needle core 10 blocks the needle sleeve 6, the baffle 8 is located on the left side of the through hole 11, and the through hole 11 is connected to the drainage tube 7 on the right. Push the sliding sleeve 2 to the left, the sliding sleeve 2 drives the control rod 3 to move to the left, and the piston 16 moves to the left to discharge the cerebrospinal fluid in the suction cylinder 15 into the transparent box 5 and discharges it through the drainage tube 7 on the right, thereby completing the collection of the cerebrospinal fluid. The guide column 26 moves to the left for a certain distance and then tilts with the upper block 27 When the guide column 26 moves to the left of the stopper 27, the stopper 27 moves forward under the action of the spring, thereby preventing the guide column 26 from moving to the right. The control rod 3 is moved downward to insert the middle plug ball 4 into the groove. If cerebrospinal fluid still needs to be aspirated, the sliding sleeve 2 is pushed to the right again and the above operation is repeated. If no aspiration is needed, the sliding sleeve 2 is pushed to the left to allow the sliding sleeve 2 to enter the auxiliary groove 23 through the transition groove 24, and then the control rod 3 is pulled upward to restore the control rod 3 to its initial position.
[0029] The invention has novel concept, ingenious structure, convenient operation and strong practicality. Through the arrangement of baffle, pull rod, push column, slide plate, push groove, slide rod, control rod and sliding sleeve, the needle core is controlled to be inserted and removed by moving the control rod up and down. The needle core is not exposed to the outside during the whole process, so needle puncture is prevented and the safety of medical staff is ensured. At the same time, the movement of the control rod can also control the connection and disconnection of the needle sleeve, the pressure measuring tube and the drainage tube, so as to realize rapid sampling after pressure measurement, without changing the equipment back and forth, and the operation is simpler, time-saving and labor-saving, and work efficiency is improved. In addition, the guide groove, guide column, piston and connecting rod are used. The arrangement of the connection block, the connection box, the through hole, the closed plate, and the connection hole facilitates the extraction and discharge of cerebrospinal fluid. When extracting fluid, the through hole is connected to the needle sleeve, and when discharging fluid, the through hole is connected to the drainage tube to achieve automatic conversion. Medical staff only need to control the up and down movement and the left and right movement of the control lever, which makes the operation more convenient. The arrangement of the connector and the threaded knob makes the device easy to clean and disinfect, convenient for multiple use, and reduces the waste of resources. There will be no waste of cerebrospinal fluid due to the insertion and extraction of the needle core throughout the process. The necessary cerebrospinal fluid can be effectively extracted, unnecessary waste can be reduced, and the comfort of the patient can be improved.
[0030] It can be seen that the use of a sample extraction device provided by the present invention can effectively solve the problem of complicated cerebrospinal fluid extraction operation and easy waste of cerebrospinal fluid. This structure is simple to operate, easy to use, and improves the efficiency of cerebrospinal fluid aspiration.
Claims
1. A sample extraction device, comprising a main box (1), characterized in that: A sliding sleeve (2) is slidably connected to the right side of the upper end of the main body box (1), a groove with an opening facing rightward is provided in the sliding sleeve (2), a control rod (3) in the upper and lower directions is slidably connected in the sliding sleeve (2), three plug balls (4) distributed in the upper and lower directions and movable left and right are provided on the control rod (3), and the plug balls (4) can be inserted into the groove, a transparent box (5) is fixed to the left side of the upper end of the main body box (1), a needle sleeve (6) is provided at the left end of the transparent box (5) in a left and right axial direction, and an L-shaped drainage pipe (6) with a lower side having a lower front and a higher rear side is fixed to the left and right sides of the lower end of the transparent box (5) respectively. 7), a baffle plate (8) in an inverted L shape is provided in the transparent box (5) and moves left and right as the control rod (3) moves up and down. The baffle plate (8) can cover the upper opening of the discharge pipe (7). A leakage hole (9) is provided on the baffle plate (8) and is connected to the discharge pipe (7). A needle core (10) is fixed on the baffle plate (8) and can be inserted into the needle sleeve (6). The inner diameter of the left end of the needle sleeve (6) is smaller than the inner diameter of the right end thereof. The outer diameter of the needle core (10) is equal to the inner diameter of the left end of the needle sleeve (6). A through hole (11) is provided in the upper end of the transparent box (5) in the vertical direction. The transparent box (5) is provided with a pressure measuring box (12) at the upper end, and a through hole (13) is provided on the pressure measuring box (12) which passes through the pressure measuring box (12) from top to bottom and is coaxial with the through hole (11). A pressure measuring tube (14) coaxial with the through hole (13) is fixed on the upper end of the pressure measuring box (12). A suction cylinder (15) is fixed on the pressure measuring box (12) in a left-right axial direction, and the left end surface of the suction cylinder (15) is flush with the side wall of the through hole (13). The suction cylinder (15) is provided with a The piston (16) moves, and when the plug ball (4) located in the middle is inserted into the groove, the sliding sleeve (2) can move left and right. When the sliding sleeve (2) moves to the right, the baffle (8) blocks the two drainage pipes (7), and the through hole (11) is connected to the outside through the needle sleeve (6). When the sliding sleeve (2) moves to the left, the needle core (10) blocks the needle sleeve (6), and the needle sleeve (6) is connected to the drainage pipe (7) on the left side through the leakage hole (9), and the drainage pipe (7) on the right side is connected to the through hole (11).
2. A sample extraction tool according to claim 1, characterized in that: The control rod (3) is provided with three cylindrical grooves corresponding to the plug balls (4) one by one and opening to the left. The plug balls (4) are located in the corresponding cylindrical grooves, and the right end of the plug balls (4) is connected to the right side wall of the cylindrical groove via a compression spring.
3. A sample extraction tool according to claim 1, characterized in that: A slide plate (17) is slidably connected inside the main body box (1), and a push groove (18) is provided on the slide plate (17). The push groove (18) includes three vertical grooves in the up-and-down direction and two inclined grooves which are lower on the left and higher on the right. The three vertical grooves and the two inclined grooves are arranged alternately, and the lower ends of the vertical grooves are connected to the upper ends of the adjacent vertical grooves through the inclined grooves. A slide bar (19) in the left-and-right direction is fixed to the lower end of the control rod (3), and the slide bar (19) passes through the slide plate (177) and is slidably connected to the slide plate (177). A pull rod (20) in an inverted L shape which is located above the main body box (1) is fixed to the right end of the baffle (8), and the right end of the pull rod (20) passes through the transparent box (5). The lower end of the pull rod (20) is inserted into the main body box (1) and is slidably connected to the main body box (1). A push column (21) inserted into the push groove (18) is fixed to the lower end of the pull rod (200), and the baffle (8) is slidably connected to the transparent box (5).
4. A sample extraction tool according to claim 1, characterized in that: A connection box (22) with an opening facing upward is fixed to the rear end of the sliding sleeve (2), a connection rod is fixed to the right end of the piston (16), a connection block that can be inserted into the connection box (22) is fixed to the right end of the connection rod, the left end surface of the piston (16) is flush with the inner wall of the through hole (13), and the piston (16) is slidably connected to the suction cylinder (15).
5. A sample extraction tool according to claim 1, characterized in that: The main body box (1) is provided with a guide groove, which includes an auxiliary groove (23) in the up-down direction, a transition groove (24) in the left-right direction, and a mouth-shaped groove (25). The lower left end of the mouth-shaped groove (25) is connected to the middle of the auxiliary groove (23) through the transition groove (24). A guide column (26) inserted into the guide groove is fixed on the control rod (3).
6. A sample extraction tool according to claim 1, characterized in that: The main body box (1) is slidably connected with two stoppers (27) whose front ends are inserted into the mouth-shaped groove (25) and are distributed up and down. The upper stopper (27) is located to the right of the left corner of the upper end of the mouth-shaped groove (25) and its front end surface is a left front and right rear inclined surface. The lower stopper (27) is located to the left of the right corner of the lower end of the mouth-shaped groove (25) and its front end surface is a left rear and right front inclined surface. The rear end of the stopper (27) is connected to the main body box (1) via a spring.
7. A sample extraction tool according to claim 1, characterized in that: A liquid collecting pipe (28) which is lower in front and higher in the back and passes through the main box (1) is fixed at the lower end of the two liquid discharge pipes (7).
8. A sample extraction tool according to claim 1, characterized in that: The pressure measuring box (12) is slidably connected with an L-shaped sealing plate (29) capable of covering the through hole (13). The sealing plate (29) is located above the suction cylinder (15). The sealing plate (29) is provided with a connecting hole (30) which is coaxial with the through hole (13) and passes through the sealing plate (29) vertically. The upper end of the sealing plate (29) passes through the pressure measuring box (12) and is slidably connected to the pressure measuring box (12). An elastic blocking column (31) capable of contacting the sealing plate (29) is fixed to the pressure measuring box (12).
9. A sample extraction tool according to claim 1, characterized in that: The right end of the needle sleeve (6) is fixed with a connector (32), which is threadedly connected to the main box (1). The upper end of the transparent box (5) is provided with a clearance groove, into which the pressure measuring box (12) can be inserted. The front and rear sides of the pressure measuring box (12) are respectively threadedly connected with threaded knobs (33), which are threadedly connected to the transparent box (5). The upper and left ends of the transparent box (5) are respectively fixed with sealing rings, the needle core (10) is located on the inner side of the sealing ring at the left end, and the sealing ring at the left end can contact the connector (32). The through hole (11) is located on the inner side of the sealing ring at the upper end, and the sealing ring at the upper end can contact the pressure measuring box (12).
10. A sample extraction tool according to claim 1, characterized in that: The upper end of the control rod (3) is rotatably connected to a finger ring, and scale lines are fixed on the needle sleeve (6) and the pressure measuring tube (14) respectively, and the inclined surface at the needle tip of the needle sleeve (6) is perpendicular to the axis of the pressure measuring tube (14).