Suction device used after bone marrow puncture

Abstract

The invention belongs to the technical field of bone marrow puncture, and relates to a post-bone marrow puncture suction device which comprises a mounting shell, a transmission box fixedly arranged on the mounting shell and a limiting arc plate rotationally arranged on the mounting shell. A limiting block in the limiting unit is used for precisely limiting the liquid pumping stroke, the volume is quantified in cooperation with rack and gear transmission, it is ensured that the pumping amount is precise, and the excessive risk is avoided; through the damping effect of the hydraulic damper, the moving speed of the liquid extraction sliding block is limited, the extraction speed is controllable, and pain and tissue damage of a patient are reduced; by means of a two-way locking structure of the ratchet wheel and the pawl, the liquid extraction sliding block is prevented from moving reversely, marrow fluid is prevented from flowing back, and infection and hematoma risks are reduced; the detachable design of the disposable syringe and the hydraulic damper which are detachably connected in a clamping mode is adopted, disinfection is convenient, and cross infection is reduced; hydraulic transmission unlocking and one-key operation of a liquid outlet button are achieved, the operation safety and convenience are improved, and the clinical precise and safe suction requirements are met.

Description

Technical Field

[0001] The invention belongs to the technical field of bone marrow puncture, and in particular relates to a post-bone marrow puncture aspiration device. Background Art

[0002] In the medical field, bone marrow puncture is an important examination method for obtaining bone marrow fluid for disease diagnosis (such as leukemia and anemia). After the bone marrow puncture, the bone marrow fluid must be extracted into a syringe using a suction device. However, existing aspiration devices after bone marrow puncture have the following significant drawbacks in practical applications: (1) Uncontrollable extraction speed: The existing device lacks an effective speed control mechanism. If the medical staff does not operate with stable force when extracting bone marrow fluid, the extraction speed may be too fast, causing severe pain to the patient or damage to the bone marrow tissue, affecting the accuracy of subsequent testing; (2) Imprecise control of the extraction volume: Different clinical test items require different volumes of bone marrow fluid (such as 5 ml, 10 ml, 15 ml, etc.). Traditional devices rely on medical staff to manually control the extraction stroke and lack a quantitative limit structure, which is prone to errors in the extraction volume and even excessive extraction due to operational errors, increasing patient risks. (3) Risk of liquid reflux: If the device is not stable enough or lacks a reflux prevention design during the suction process, bone marrow fluid may flow back to the puncture site, which will not only affect the integrity of the sample, but may also cause local infection or hematoma, exacerbating the patient's pain.

[0003] Therefore, a post-bone marrow puncture aspiration device with controllable extraction speed, precisely controllable extraction volume and ability to prevent liquid reflux is needed to solve the above problems. Summary of the Invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention uses the limit block in the limit unit to accurately limit the pumping stroke, and cooperates with the rack and pinion transmission to quantify the volume, so as to ensure the accuracy of the extraction volume and avoid the risk of overdose; through the damping effect of the hydraulic damper, the movement speed of the pumping slider is limited to achieve controllable pumping speed, reducing patient pain and tissue damage; with the help of the two-way locking structure of the ratchet and pawl, the pumping slider is prevented from moving in the opposite direction, preventing the backflow of bone marrow fluid and reducing the risk of infection and hematoma; a detachable disposable syringe and a detachable hydraulic damper are adopted to facilitate disinfection and reduce cross infection; the hydraulic transmission unlocking and the liquid discharge button are operated with one button, which improves the safety and convenience of operation and meets the clinical requirements of accurate and safe suction.

[0005] The technical solution adopted by the present invention is as follows: a post-bone marrow puncture suction device, comprising a mounting shell, a transmission box fixedly arranged on the mounting shell, and a limiting arc plate rotatably arranged on the mounting shell, a syringe body is detachably clamped in the mounting shell, a piston rod is slidably arranged inside the syringe body, and a clamping design is adopted to facilitate the use of a disposable syringe for extraction, thereby avoiding the difficulty of disinfection caused by the use of a fixed reusable syringe and thus causing infection of the patient's wound, a piston box 1 is fixedly provided on the side wall of the mounting shell, a clamping piston is slidably provided in the mounting shell, one end of the piston rod is clamped in the clamping piston, and one end of the piston box 1 is detachably fixed with a hydraulic damper, and the detachable design facilitates the removal of the hydraulic damper and then The device is disinfected. The hydraulic damper includes a piston box 2 fixed at one end of the piston box 1 and a piston 2 slidably arranged in the piston box 2. A number of tiny through holes are provided on the piston box. The piston box 2 is filled with hydraulic oil. The function of the hydraulic oil is to prevent the piston 2 from moving quickly in the piston box 2 when the return spring 1 is in place, so as to avoid the bone marrow fluid from being extracted too quickly. A return spring 1 is fixed at one end of the piston 2, and the other end of the return spring 1 is fixedly connected to the piston box 2. The function of the return spring 1 is to reset the piston 2. The other end of the piston 2 is fixed with a piston 1, and the piston 1 is in contact with the clamping piston. A liquid extraction slider is slidably provided on the mounting shell, and a transmission rod 2 is fixed between the liquid extraction slider and the clamping piston.

[0006] As a preferred technical solution of this scheme, a limit unit is provided in the array inside the transmission box, and the limit unit can limit the movement of the liquid pumping slider. The limit unit includes a limit block slidably arranged on the top wall of the transmission box, a limit button slidably arranged on the side wall of the transmission box, a slider sleeve fixedly arranged at one end of the limit button, an ejection slider slidably arranged in the slider sleeve, an ejection spring fixedly arranged at the bottom of the ejection slider, a transmission rod 1 fixedly arranged on the side wall of the slider sleeve and a return spring 2 fixedly arranged on the transmission rod 1, the other end of the ejection spring is fixedly connected to the slider sleeve, and the other end of the return spring 2 is fixedly connected to the inner wall of the transmission box, the limit block is used to prevent the liquid pumping slider from sliding on the transmission box, the return spring 2 is used to reset the transmission rod 1, and the ejection spring can eject the ejection slider upward.

[0007] As an optimal technical solution of this scheme, a ratchet 1 is provided on the surface of the mounting shell for rotation, and a ratchet 2 is coaxially fixed on the top of the ratchet 1, and a gear is coaxially fixed on the top of the ratchet 2, and a rack is fixed on one side of the liquid pumping slider, and the rack is meshed with the gear, and the gear can limit the movement of the liquid pumping slider through the rack. A pawl 1 is provided on the surface of the mounting shell for rotation, and a pawl 2 is coaxially rotated on the top of the pawl 1, and the pawl 1 corresponds to the ratchet 1. When the ratchet 1 and the pawl 1 are in contact, the liquid pumping slider can be prevented from moving toward the piston box 1. The ratchet 2 corresponds to the pawl 2, and when the ratchet 2 and the pawl 2 are in contact, the liquid pumping slider can be prevented from moving away from the piston box 1. A spring sheet 1 is fixed on the inner wall of the transmission box, and the spring sheet 1 makes the pawl 2 contact the ratchet 2, and the spring sheet 2 is fixed on the inner wall of the transmission box, and the spring sheet 2 makes the pawl 1 contact the ratchet 1.

[0008] As a preferred technical solution of this scheme, a hydraulic transmission tube is fixedly provided in the side wall of the transmission box, and the hydraulic transmission tube is filled with liquid. An unlocking slider 2 is provided in an array-type sliding manner in the hydraulic transmission tube, and a transmission rod 1 can push the unlocking slider 2 to move. An unlocking slider 1 is slidingly provided on the hydraulic transmission tube, and pushing the unlocking slider 2 to move can make the unlocking slider 1 move and push the pawl 1 to disengage the ratchet 1.

[0009] As a preferred technical solution of this solution, a liquid discharge button is slidably provided on the transmission box, and pushing the liquid discharge button can disengage the second pawl from the second ratchet wheel.

[0010] After adopting the above structure, the beneficial effects of the present invention are as follows: (1) The extraction volume is precisely controllable: The limit unit in the transmission box can select the corresponding limit button according to clinical needs (such as 5 ml, 10 ml, 15 ml), and the limit block is pushed up by the ejection spring to accurately limit the maximum sliding distance of the extraction slider. In conjunction with the transmission relationship between the rack and the gear, the extraction stroke is converted into a quantitative volume, avoiding manual control errors, reducing the risk of over-extraction, and improving operational accuracy; (2) Controllable extraction speed: Through the design of the hydraulic damper, when the piston 2 moves in the piston box 2, the hydraulic oil produces a damping effect through the tiny through-hole, hindering the rapid reset of the piston, thereby limiting the movement speed of the extraction slider, preventing medical staff from extracting bone marrow fluid too quickly due to unstable operation force, reducing patient pain and the risk of bone marrow tissue damage, and ensuring sample quality; (3) Effectively prevent liquid backflow: The two-way locking structure between ratchet 1 and pawl 1, and ratchet 2 and pawl 2, limits the movement of the liquid extraction slider away from the piston box through pawl 2 during the extraction process, prevents the piston rod from retreating, avoids the backflow of bone marrow fluid to the puncture site, reduces the risk of infection and hematoma, and ensures the integrity of the sample; (4) Reduce infection risk and facilitate disinfection: The disposable syringe body is detachable and snap-on to avoid the disinfection risks of reused syringes; the detachable design of the hydraulic damper facilitates the disinfection of other components, and the quick fixing structure of the limiting arc plate ensures the convenience of operation and reduces the risk of cross infection from a structural perspective, which complies with medical safety standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention.

[0012] Figure 1 This is a schematic diagram of the overall structure of a post-bone marrow puncture aspiration device according to the present invention; Figure 2 Schematic diagram of the connection structure between the limit button and the transmission box in the present invention; Figure 3 It is a cross-sectional view of the hydraulic damper structure in the invention; Figure 4 Schematic diagram of the connection structure between the liquid pumping slider and the clamping piston in the present invention; Figure 5 Schematic diagram of the connection structure between the liquid pumping slider and the rack in the present invention; Figure 6 for Figure 5 A magnified view of the local structure at point A; Figure 7 Schematic diagram of the connection structure of the limiting unit in the present invention; Figure 8 Schematic diagram of the connection structure between the liquid outlet button and the second pawl in the present invention; Figure 9 Schematic diagram of the connection structure between the unlocking slider 1 and the pawl 1 in the present invention.

[0013] In the accompanying drawings: 1. Mounting shell; 2. Limiting arc plate; 3. Hydraulic damper; 4. Syringe body; 5. Transmission box; 6. Liquid extraction slider; 7. Piston box 1; 8. Limiting unit; 9. Limiting button; 10. Transmission rod 2; 11. Piston rod; 12. Clamping piston; 13. Piston 1; 14. Piston 2; 15. Return spring 1; 16. Piston box 2; 17. Rack; 18. Ratchet 1; 19. Ratchet 2; 20. Gear; 21. Ratchet 1; 22. Ratchet 2; 23. Ejection slider; 24. Ejection spring; 25. Slider sleeve; 26. Transmission rod 1; 27. Return spring 2; 28. Liquid discharge button; 29. ​​Spring sheet 1; 30. Spring sheet 2; 31. Unlocking slider 1; 32. Hydraulic transmission pipe; 33. Unlocking slider 2; 34. Limiting block. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0016] Example 1, as Figures 1-9 As shown, the post-bone marrow puncture suction device of this embodiment includes a mounting shell 1, a transmission box 5 fixedly arranged on the mounting shell 1, and a limiting arc plate 2 rotatably arranged on the mounting shell 1. A syringe body 4 is detachably clamped in the mounting shell 1, and a piston rod 11 is slidably provided inside the syringe body 4. The clamping design facilitates the use of a disposable syringe for extraction, avoids the difficulty of disinfection caused by the use of a fixed reusable syringe and thus causes the patient's wound infection. A piston box 7 is fixedly provided on the side wall of the mounting shell 1, and a clamping piston 12 is slidably provided in the mounting shell 1. One end of the piston rod 11 is clamped in the clamping piston 12, and one end of the piston box 7 is detachably fixed with a hydraulic damper 3. The detachable design facilitates the removal of the hydraulic damper 3 and then disinfection of the device. The pressure damper 3 includes a piston box 2 16 fixed at one end of the piston box 17 and a piston 2 14 slidably arranged in the piston box 2 16, and is provided with a number of tiny through holes. The piston box 2 16 is filled with hydraulic oil. The hydraulic oil prevents the piston 2 14 from moving quickly in the piston box 2 16 by the return spring 15, thereby avoiding the bone marrow fluid from being extracted too quickly. A return spring 15 is fixed at one end of the piston 2 14, and the other end of the return spring 15 is fixedly connected to the piston box 2 16. The function of the return spring 15 is to reset the piston 2 14. A piston 13 is fixed at the other end of the piston 2 14, and the piston 13 is in contact with the clamping piston 12. A liquid extraction slider 6 is slidably provided on the mounting shell 1, and a transmission rod 2 10 is fixed between the liquid extraction slider 6 and the clamping piston 12.

[0017] Among them, a limit unit 8 is provided in the array inside the transmission box 5, which can limit the movement of the liquid extraction slider 6. The limit unit 8 includes a limit block 34 slidably arranged on the top wall of the transmission box 5, a limit button 9 slidably arranged on the side wall of the transmission box 5, a slider sleeve 25 fixed at one end of the limit button 9, an ejection slider 23 slidably arranged in the slider sleeve 25, an ejection spring 24 fixed at the bottom of the ejection slider 23, a transmission rod 1 26 fixed on the side wall of the slider sleeve 25, and a return spring 27 fixed on the transmission rod 1 26. The other end of the ejection spring 24 is fixedly connected to the slider sleeve 25, and the other end of the return spring 27 is fixedly connected to the inner wall of the transmission box 5. The limit block 34 is used to prevent the liquid extraction slider 6 from sliding on the transmission box 5, and the return spring 27 is used to reset the transmission rod 1 26. The ejection spring 24 can eject the ejection slider 23 upward.

[0018] Among them, the surface of the mounting shell 1 is provided with a ratchet 18 for rotation, the top of the ratchet 18 is coaxially fixed with a ratchet 2 19, the top of the ratchet 2 19 is coaxially fixed with a gear 20, and one side of the liquid extraction slider 6 is fixed with a rack 17, the rack 17 is meshed with the gear 20, and the gear 20 can limit the movement of the liquid extraction slider 6 through the rack 17, and the surface of the mounting shell 1 is provided with a pawl 21 for rotation, and the top of the pawl 21 is coaxially rotated with a pawl 22, and the pawl 21 is opposite to the ratchet 18. When the ratchet 18 and the pawl 1 21 are in contact, the liquid pumping slider 6 can be prevented from moving toward the piston box 1 7. The ratchet 2 19 corresponds to the pawl 2 22. When the ratchet 2 19 and the pawl 2 22 are in contact, the liquid pumping slider 6 can be prevented from moving away from the piston box 1 7. A spring piece 29 is fixedly provided on the inner wall of the transmission box 5. The spring piece 29 makes the pawl 2 22 contact the ratchet 2 19. A spring piece 2 30 is fixedly provided on the inner wall of the transmission box 5. The spring piece 2 30 makes the pawl 1 21 contact the ratchet 18.

[0019] Among them, a hydraulic transmission tube 32 is fixedly provided in the side wall of the transmission box 5, and the hydraulic transmission tube 32 is filled with liquid. An unlocking slider 2 33 is slidingly provided in the hydraulic transmission tube 32 in an array manner. The transmission rod 1 26 can push the unlocking slider 2 33 to move. An unlocking slider 1 31 is slidingly provided on the hydraulic transmission tube 32. Pushing the unlocking slider 2 33 to move can make the unlocking slider 1 31 move and push the pawl 1 21 out of the ratchet 18.

[0020] A liquid discharge button 28 is slidably provided on the transmission box 5 , and pushing the liquid discharge button 28 can disengage the second ratchet pawl 22 from the second ratchet wheel 19 .

[0021] When using it specifically: separate the mounting shell 1 and the limiting arc plate 2, snap the syringe body 4 onto the mounting shell 1, snap one end of the piston rod 11 outside the syringe body 4 onto the snap-on piston 12, rotate the limiting arc plate 2 to fix the movable end of the limiting arc plate 2 onto the mounting shell 1, and complete the fixation of the syringe body 4. Select the limiting unit 8 according to the measurement of the bone marrow to be extracted. If you want to extract five milliliters, choose to use the first limiting unit 8, if you want to extract ten milliliters, choose to use the second limiting unit 8, and if you want to extract fifteen milliliters, choose to use the third limiting unit 8. After selecting, press the corresponding limiting button 9, and the limiting button 9 drives the slider sleeve 25 to move. The movement of the slider sleeve 25 drives the transmission rod 1 26 to move. The transmission rod 1 26 moves and contacts the unlocking slider 2 33, squeezing the unlocking slider. The locking slider 2 33 moves toward the hydraulic transmission tube 32, and the unlocking slider 2 33 squeezes the liquid in the hydraulic transmission tube 32, thereby extending the unlocking slider 1 31. The extension of the unlocking slider 1 31 drives the pawl 1 21 to rotate and disengage from the ratchet 18. The movement of the liquid extraction slider 6 will drive the rack 17 to move, and the movement of the rack 17 drives the gear 20 to rotate. The rotation of the gear 20 drives the ratchet 18 and the ratchet 2 19 to rotate. If the ratchet 18 contacts the pawl 1 21, the ratchet 18 will hinder the liquid extraction slider 6 from moving toward the piston box 1 7. The pawl 1 21 no longer restricts the rotation of the ratchet 18, so that the ratchet 18 no longer restricts the movement of the liquid extraction slider 6 toward the piston box 1 7, avoiding medical accidents caused by forgetting to set the extraction volume. The movement of the ejection spring 24 will also The ejection slider 23 is driven to move. When the ejection slider 23 moves to the bottom of the limit block 34, the ejection slider 23 is no longer restricted by the top wall of the transmission box 5 and moves upward. The ejection slider 23 moves upward, driving the limit block 34 to move upward. After the limit block 34 moves upward, it can limit the maximum sliding distance of the liquid extraction slider 6 to accurately control the extracted volume. After the ejection spring 24 moves upward to eject the limit block 34, the ejection spring 24 enters the top wall of the transmission box 5, thereby completing the fixation of the transmission rod 12, so that the pawl 12 will not limit the movement of the liquid extraction slider 6 during the extraction process, and the liquid extraction slider 6 is moved. The liquid extraction slider 6 drives the engaging piston 12 to move and then drives the piston rod 11 to move, thereby extracting the bone marrow. During the extraction process, the hydraulic The movable end of the damper 3 contacts the clamping piston 12, and the hydraulic damper 3 can prevent the extraction speed from being too fast and causing harm to the patient. At the same time, the pawl 22 contacts the ratchet 2 19, and limits the movement of the extraction slider 6 in the direction away from the piston box 7 via the gear 20 and the rack 17, so as to prevent the backflow of bone marrow fluid from increasing the risk of infection and causing damage to the puncture site. After the extraction is completed, the bone marrow fluid in the syringe body 4 needs to be released, and the liquid discharge button 28 is pressed. The liquid discharge button 28 drives the pawl 22 to disengage from the ratchet 2 19, and the ratchet 2 19 no longer limits the movement of the extraction slider 6 in the direction away from the piston box 7. The movable end of the hydraulic damper 3 pushes the clamping piston 12 and then pushes the piston rod 11 to complete the release of the bone marrow fluid. After the release is completed, the limit block 34 is pressed.The limit block 34 drives the ejection slider 23 to move downward and away from the top wall of the transmission box 5. The transmission box 5 no longer restricts the movement of the ejection slider 23. The transmission rod 1 26 is reset under the action of the reset spring 2 27, and the entire device is reset to facilitate the next use.

[0022] In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to this technical solution without creatively designing them without departing from the purpose of the invention, they should all fall within the scope of protection of the invention.

Claims

1. A post-bone marrow puncture suction device, comprising a mounting shell (1), a transmission box (5) fixedly mounted on the mounting shell (1), and a limiting arc plate (2) rotatably mounted on the mounting shell (1), characterized in that: The mounting shell (1) is provided with a syringe body (4) in a detachable snap-fit ​​manner, and a piston rod (11) is slidably provided inside the syringe body (4). A piston box (7) is fixedly provided on the side wall of the mounting shell (1), and a snap-fit ​​piston (12) is slidably provided inside the mounting shell (1). One end of the piston rod (11) is snap-fitted in the snap-fit ​​piston (12), and a hydraulic damper (3) is detachably fixedly provided at one end of the piston box (7). The movable end of the hydraulic damper (3) is fixedly connected to the snap-fit ​​piston (12). A liquid extraction slider (6) is slidably provided on the mounting shell (1), and a transmission rod 2 (10) is fixedly provided between the liquid extraction slider (6) and the snap-fit ​​piston (12). A limit unit (8) is arrayed in the transmission box (5), and the limit unit (8) corresponds to the liquid extraction slider (6).

2. A post-bone marrow puncture aspiration device according to claim 1, characterized in that: The limiting unit (8) includes a limiting block (34) slidably arranged on the top wall of the transmission box (5), a limiting button (9) slidably arranged on the side wall of the transmission box (5), a slider sleeve (25) fixedly arranged at one end of the limiting button (9), an ejection slider (23) slidably arranged in the slider sleeve (25), an ejection spring (24) fixedly arranged at the bottom of the ejection slider (23), a transmission rod (26) fixedly arranged on the side wall of the slider sleeve (25), and a return spring (27) fixedly arranged on the transmission rod (26), the other end of the ejection spring (24) is fixedly connected to the slider sleeve (25), and the other end of the return spring (27) is fixedly connected to the inner wall of the transmission box (5).

3. The post-bone marrow puncture aspiration device according to claim 2, characterized in that: A hydraulic transmission tube (32) is fixedly provided in the side wall of the transmission box (5), and an unlocking slider (33) is arranged in an array-type sliding manner in the hydraulic transmission tube (32), and the unlocking slider (33) corresponds to the transmission rod (26).

4. The post-bone marrow puncture aspiration device according to claim 3, characterized in that: A ratchet wheel 1 (18) is rotatably provided on the top of the mounting shell (1), a ratchet wheel 2 (19) is coaxially fixedly provided on the top of the ratchet wheel 1 (18), and the liquid extraction slider (6) is in transmission connection with the ratchet wheel 2 (19).

5. The post-bone marrow puncture aspiration device according to claim 4, characterized in that: A liquid outlet button (28) is slidably provided on the transmission box (5), and the liquid outlet button (28) corresponds to the second ratchet (19).

6. The post-bone marrow puncture aspiration device according to claim 5, characterized in that: An unlocking slider (31) is slidably provided on the hydraulic transmission tube (32), and the unlocking slider (31) corresponds to the ratchet (18).

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