Bone marrow collecting device for department of hematology

Abstract

The invention relates to the technical field of medical instruments, in particular to a hematology department bone marrow collecting device which comprises a thick tube part and a thin tube part connected to the bottom of the thick tube part, a needle tube is connected in the thin tube part in a sleeved mode and extends downwards, the hematology department bone marrow collecting device further comprises a thick tube part and a thin tube part connected to the bottom of the thick tube part, and the needle tube penetrates through the thin tube part in a sliding mode. The device further comprises a collecting mechanism and a negative pressure adjusting mechanism. The collecting mechanism comprises a button arranged on the top of the thick tube part and a piston abutting against the top of the needle tube. The negative pressure adjusting mechanism is arranged between the button and the piston and is used for adjusting the speed and the flow rate of bone marrow collection; the speed and flow of bone marrow collection can be adjusted, the stability is good, the comfort degree is high, and pain caused by multiple times of puncture to a patient is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a bone marrow collection device for hematology. Background Art

[0002] There are many kinds of hematological diseases, including anemic diseases (such as iron deficiency anemia, aplastic anemia, etc.), white blood cell system diseases (such as leukemia, myelodysplastic syndrome, etc.) and other hemorrhagic diseases and tumor diseases. The diagnosis and treatment of these diseases often rely on bone marrow examination to provide accurate basis. Therefore, bone marrow collection devices have a wide range of application needs in the field of hematology. With the continuous development of medical technology, bone marrow collection devices are also constantly updated. However, during the collection process, traditional bone marrow collection devices often have low collection efficiency due to factors such as the viscosity of the bone marrow mixture and pipeline resistance. Multiple punctures or extended collection time are required. In addition, during the bone marrow collection process, the bone marrow mixture is prone to accumulate and coagulate in the pipeline, resulting in tube blockage, which not only increases the patient's pain and discomfort, but may also affect the accuracy of the collection results.

[0003] In response to the above problems, the patent number: CN111388027B discloses a bone marrow collection device, including a sleeve and a needle core sleeved in the sleeve, wherein the needle core is provided with an input channel for inputting impact fluid and an output channel for extracting a bone marrow mixture; further comprising an impact system and a collection system, wherein the impact system includes a storage chamber, an impact pump and an impact pipeline, wherein the impact pipeline is connected to the input channel, and the impact pump is used to output the impact fluid in the storage chamber to the input channel; and the collection system includes a collection chamber, which is connected to the output channel through a pipeline. The bone marrow collection device provided by the present invention impacts the bone marrow cavity through the high-speed liquid flow of the impact system, thereby extracting a larger range and more bone marrow, thereby reducing the number of punctures required.

[0004] However, the bone marrow collection device still has the following problems during use: 1. Although the bone marrow collection device has a large impact force, it is easy to flush most of the bone marrow into the bone marrow cavity, affecting the bone marrow collection; 2. The bone marrow collection device has no stabilizing device during collection and needs to be held by medical staff. The patient's comfort level is also low during collection and needle withdrawal; 3. When the bone marrow collection device discharges the collected bone marrow from the collection cavity and places it in a container for testing, the bone marrow in the collection cavity is prone to residue and cannot be completely discharged out of the collection cavity. If the amount of bone marrow discharged out of the collection cavity is too little, multiple punctures and collections are inevitably required, which can easily cause discomfort to the patient. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention aims to provide a hematology bone marrow collection device to at least solve the problem that the bone marrow collection device in the prior art cannot adjust the collection speed and has poor stability.

[0006] The main idea of ​​the technical solution adopted by the present invention is: A bone marrow collection device for hematology is designed, including: a negative pressure regulating mechanism, a flushing mechanism, and a stabilizing mechanism. The negative pressure regulating mechanism adjusts the negative pressure inside the device, so that the speed of bone marrow collection can be specifically adjusted according to different patients. The flushing mechanism is arranged above the needle tube, and the flushing mechanism runs through the needle tube and the bottom is located above the needle head. A sphere is arranged at the bottom of the flushing mechanism to disperse the flushing solution to avoid excessive impact force causing the bone marrow mixture to rush into the bone marrow cavity. The stabilizing mechanism allows the needle to be inserted smoothly during collection and withdrawn steadily after collection is completed, so as to reduce the patient's pain as much as possible. In addition, a locking structure is arranged outside the needle tube, so that the needle tube is locked after reaching a certain position, further improving the stability during puncture.

[0007] In order to achieve the above object, the technical solution adopted by the present invention to solve the technical problem is: A bone marrow collection device for hematology, comprising: a thick tube part and a thin tube part connected to the bottom of the thick tube part, a needle tube slidingly passing through the thin tube part, and also comprising: a collection mechanism and a negative pressure adjustment mechanism; The collecting mechanism includes: a button arranged at the top of the thick tube part and a piston abutting against the top of the needle tube; The negative pressure regulating mechanism is arranged between the button and the piston, and is used for regulating the flow rate of collecting bone marrow.

[0008] Furthermore, the negative pressure regulating mechanism includes: a screw rod, a slider and a spring; The top of the screw rod is connected with a button; The upper section of the slider is threadedly matched with the lower section of the screw rod; The top of a spring is connected to the slider and the bottom is connected to the piston.

[0009] Furthermore, it also includes a flushing mechanism disposed above the needle tube and penetrating the needle tube, the flushing mechanism including: a pump body, a first delivery tube and a second delivery tube; The pump body is arranged in the thick pipe part and the bottom is connected with a first delivery pipe; The bottom of the first delivery tube is sleeved with a second delivery tube, and the second delivery tube runs through the needle tube.

[0010] Furthermore, a first spring is arranged near the bottom end in the second delivery tube, a first sphere is arranged at the bottom of the first spring, and the first sphere extends out of the second delivery tube.

[0011] Furthermore, a notch is provided on the thick tube portion, and a feeding port is provided on the pump body, and the feeding port extends from the notch to the outside of the thick tube portion.

[0012] Furthermore, a connecting piece is arranged outside the thick tube portion, and the connecting piece is used for movably connecting the stabilizing mechanism.

[0013] Furthermore, the stabilizing mechanism includes: a limiter, a movable rod, a sleeve and a plurality of presser feet; The limiting member is arranged above the connecting member; The movable rod is connected to the bottom of the limiting member and is movably sleeved in the connecting member; The sleeve is connected to the bottom of the movable rod and is movably sleeved outside the needle tube, and a plurality of presser feet are evenly distributed on the bottom of the sleeve.

[0014] Furthermore, a locking piece for limiting the position of the needle tube is movably provided on the capillary portion, and a locking groove matching the locking piece is provided on the outer side wall of the needle tube.

[0015] Furthermore, a cylinder is vertically arranged on the capillary portion, one end of the locking member passes through the cylinder, and the other end abuts against the needle tube and matches the locking groove, and a second spring is arranged between the cylinder and one end of the locking member located in the cylinder.

[0016] Furthermore, a pressure plate is provided below the button, and the pressure plate is slidably located in the thick tube portion. A limit rack is also provided in the thick tube portion, and the limit rack is provided below the pressure plate; Two sections of springs are arranged between the pressure plate and the limit frame.

[0017] Compared with the prior art, the present invention has the following advantages: The present invention can adjust the negative pressure in the needle tube by arranging a negative pressure regulating mechanism, thereby adjusting the speed of bone marrow collection; the present invention can prevent the needle tube from being blocked by the bone marrow mixture during the sampling process by arranging a flushing mechanism, thereby improving the collection efficiency and effectively avoiding multiple collections; the present invention can achieve stable needle insertion during collection and stable needle withdrawal after bone marrow collection by arranging a stabilizing mechanism, effectively improving the patient's comfort and avoiding causing discomfort to the patient; the present invention can lock the needle tube after it is pushed to a certain position by arranging a locking piece, thereby further improving the stability during use; the present invention can discharge as much bone marrow as possible into the detection container after being collected by arranging a pressure plate.

[0018] The present invention provides a negative pressure regulating mechanism. When the button is rotated, the screw rod rotates simultaneously. Through the cooperation of the threads outside the screw rod and inside the slider, the slider slides downward or upward. The downward movement of the slider drives the needle tube downward, so that puncture can be performed. After the button is released, the negative pressure in the needle tube can collect bone marrow. The further the slider moves downward, the further the piston moves downward, and the greater the negative pressure value in the needle tube, thereby increasing the speed and flow rate of bone marrow collection. Therefore, the collection speed can be adjusted specifically according to the patient's condition.

[0019] The present invention uses a stabilizing mechanism. After the limiter is pressed, the spring is compressed and the limiter is abutted by the connecting piece. The movable rod drives the sleeve and the presser foot to move downward. After the presser foot is combined with the patient's skin, the needle tube is pushed upward, thereby realizing stable needle withdrawal and reducing the patient's discomfort.

[0020] The present invention provides a locking piece, and after the needle tube is pushed to the puncture site of the patient, the locking piece of the capillary portion is snapped into the locking groove, so that the position of the needle tube is locked and immovable, thereby further improving the stability during sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a hematology bone marrow collection device proposed by the present invention; Figure 2 This is an external schematic diagram of the thick tube portion, the thin tube portion and the needle tube proposed by the present invention; Figure 3 For the present invention Figure 2 Cross-section of the middle AA; Figure 4 For the present invention Figure 3 A magnified schematic diagram of part A; Figure 5 For the present invention Figure 3 A magnified schematic diagram of part B; Figure 6 For the present invention Figure 3 A magnified schematic diagram of part C; Figure 7 For the present invention Figure 3 The enlarged schematic diagram of the D part; Figure 8 The present invention provides a connection diagram of a screw rod, a slider and a pump body; Fig. 9 It is a structural schematic diagram of the stabilizing mechanism proposed by the present invention; Fig.10 It is a schematic diagram of the interior of the locking member proposed by the present invention; Fig.11 This is a schematic diagram of the internal structure of the thick tube part, the thin tube part and the needle tube proposed in the present invention.

[0022] The above drawings include the following reference numerals: 10. thick tube; 11. connecting piece; 12. button; 13. screw rod; 131. one of the cross keys; 14. two-stage spring; 15. slider; 151. the second cross key; 16. one-stage spring; 17. clamping piece; 18. limit rack; 20. thin tube; 21. cylinder; 22. locking groove; 23. locking piece; 24. second spring; 30. stabilizing mechanism; 31. limit piece; 32. movable rod; 33. sleeve; 34. presser foot; 40. needle tube; 41. storage chamber; 42. needle; 50. pump body; 51. feeding port; 52. first delivery pipe; 521. second delivery pipe; 522. first spring; 523. first sphere; 60. photoelectric sensor; 70. piston; 80. pressure plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example 1

[0025] like Figure 1 As shown, the present application discloses a hematology bone marrow collection device, comprising: a thick tube portion 10 and a thin tube portion 20 connected to the bottom of the thick tube portion 10, the thick tube portion 10 and the thin tube portion 20 are connected, and a needle tube 40 is sleeved in the thin tube portion 20 and extends downward, as shown in FIG. Figure 3 and Fig.11 As shown, it also includes: a collection mechanism, a negative pressure regulating mechanism and a flushing mechanism; the collection mechanism includes: a button 12 arranged at the top of the thick tube part 10 and a piston 70 abutting against the top of the needle tube 40, the button 12 passes through the top of the thick tube part 10, and can move up and down along the axial direction of the thick tube part 10, and can rotate in the thick tube part 10; Figure 6As shown, protrusions are provided on both sides of the piston 70, and the needle tube 40 matches the protrusions, and the needle tube 40 is pushed forward by the protrusions. The two sides of the bottom of the thick tube part 10 are provided with clamping parts 17, and the distance between the two clamping parts 17 matches the piston 70. The highest point of the initial position of the piston 70 is determined by the two clamping parts 17; the negative pressure regulating mechanism is provided between the button 12 and the piston 70, and the negative pressure regulating mechanism is used to adjust the speed and flow rate of collecting bone marrow; Furthermore, if Figure 4 and Figure 5 As shown, the negative pressure regulating mechanism includes: a screw rod 13, a slider 15 and a spring 16; Figure 8 As shown, a cross key 131 is provided on the top of the screw rod 13, and a cross key groove matching the cross key 131 is provided in the button 12. The top of the screw rod 13 is fixed in the button 12 by the cross key 131, so that the screw rod 13 rotates while the button 12 is rotated; a thread matching the outer part of the screw rod 13 is provided in the slider 15, and the bottom of the screw rod 13 is rotatably connected to the slider 15 through the thread, so that the slider can be adjusted to move up and down by rotating the screw rod 13; a section of spring 16 is connected to the slider 15 at the top and connected to the piston 70 at the bottom, and when the button 12 is pressed , the button 12 drives the screw rod 13, the slider 15 and a spring 16 to press down, and finally drives the piston 70 to press down. After the needle tube 40 punctures into the patient's body, the position of the needle tube 40 is fixed, and a negative pressure is formed inside the needle tube 40. Then the button 12 is released. After the button 12 is reset, it drives the screw rod 13, the slider 15 and a spring 16 to slide upward. Finally, the spring 16 drives the piston 70 to slide upward and collect and absorb bone marrow; a photoelectric sensor 60 is provided at the bottom of the slider 15, and the distance between the slider 15 and the piston 70 is detected by the photoelectric sensor 60.

[0026] In order to limit the position where the needle tube 40 punctures the patient's body, a cylinder 21 for placing a locking piece 23 is provided outside the thin tube part 20, and a locking groove 22 matching the locking piece 23 is provided outside the needle tube 40.

[0027] Furthermore, one end of the locking piece 23 is a hook and extends outside the cylinder 21, and the other end is a sphere, which abuts against the needle tube 40 and matches the locking groove 22. A second spring 24 is provided inside the cylinder 21 and at the end of the locking piece 23; when the locking piece 23 abuts against the needle tube 40, the second spring 24 is compressed, and at this time, one end of the locking piece 23 is outside the cylinder 21 and the other end is inside the cylinder 21; when the needle tube 40 is pushed downward, the locking groove 22 on the needle tube 40 moves downward to the locking piece 23, and at this time the second spring 24 returns to a normal state, one end of the locking piece 23 is outside the cylinder 21, and the sphere at the other end is clamped in the locking groove 22, and at this time the position of the needle tube 40 is locked. Example 2

[0028] On the basis of the first embodiment, in order to stably withdraw the needle after bone marrow collection, a connecting piece 11 is provided outside the thick tube portion 10, such as Figure 2 and Fig. 9 As shown, the connecting member 11 is used for movably connecting the stabilizing mechanism 30; the stabilizing mechanism 30 includes: a limiter 31, a movable rod 32, a sleeve 33 and a plurality of presser feet 34; the limiter 31 is arranged above the connecting member 11, the movable rod 32 is connected to the bottom of the limiter 31 and is movably connected to the inside of the connecting member 11, the damping between the movable rod 32 and the connecting member 11 is relatively large, and the movable rod 32 can be stopped at any position; the sleeve 33 is connected to the bottom of the movable rod 32 and is movably sleeved on the outside of the needle tube 40; a plurality of presser feet 34 are evenly distributed at the bottom of the sleeve 33, and the presser feet 34 are L-shaped, and the top of the presser feet 34 is connected to the sleeve The bottom of the tube 33; when it is necessary to collect the needle, hold the needle tube 40 above the puncture site, then press the limiter 31 to push the movable rod 32 downward, at this time, the sleeve 33 also slides downward along the needle tube 40 and makes the pressure foot 34 fit the patient's skin to achieve the function of stabilizing the entire device, and finally press the button 12 to allow the needle tube 40 to achieve vertical needle insertion; when it is necessary to withdraw the needle after collection, the medical staff presses the limiter 31 with one hand to maintain the pressure foot 34 in contact with the patient's skin, and holds the thick tube part 10 with the other hand to slide upward and move the needle tube 40 away from the puncture site, so as to achieve vertical and stable needle withdrawal and relieve the patient's pain.

[0029] Furthermore, if Figure 4 As shown, a pressure plate 80 is sleeved at the bottom of the button 12, and a limit frame is arranged in the thick tube part 10, and the limit frame is arranged below the pressure plate 80; a two-stage spring 14 is sleeved on the outer surface of the pressure plate 80, and the top of the two-stage spring 14 abuts against the pressure plate 80, and the bottom abuts against the top of the limit frame; the stiffness coefficient of the two-stage spring 14 is greater than that of the one-stage spring 16. After the sampling is completed, the bone marrow needs to be discharged from the storage cavity 41 into the detection container. At this time, the button 12 is pressed, and after the one-stage spring 16 is compressed, the resistance is instantly increased when pressed, and the two-stage spring 14 is compressed. Pressing the button 12 drives the pressure plate 80 downward to abut against the top of the limit frame. At this time, the button 12 can no longer be pressed, and the bone marrow in the storage cavity 41 is completely discharged.

[0030] Embodiment 3: According to Embodiment 1, in order to prevent the needle tube 40 from being blocked by the bone marrow mixture when collecting bone marrow, and to avoid pulling out the needle tube 40 to clean the bone marrow mixture, which causes the patient to undergo multiple punctures, a flushing mechanism is further provided, and the flushing mechanism is provided above the needle tube 40 and penetrates the needle tube 40; Furthermore, if Figure 5 and Figure 6As shown, the flushing mechanism includes: a pump body 50, a first delivery pipe 52 and a second delivery pipe 521; the pump body 50 is fixedly connected to the thick tube part 10 and is provided with a through hole in the middle; a second cross key 151 is provided on the outside of the slider 15, and a cross key groove matching it is provided on the through hole in the pump body 50, the pump body 50 is sleeved on the outside of the slider 15 and the slider 15 is locked in the horizontal direction by the second cross key 151 to prevent the slider 15 from rotating when the screw rod 13 is rotated. The slider 15 can only slide downward or upward. The lower the slider 15 is, the lower the initial position of the piston 70 is driven, and the greater the negative pressure value is achieved, so that the speed of collecting bone marrow is faster; on the contrary, the higher the slider 15 is, The initial position of the piston 70 is driven upward, and the smaller the negative pressure value is, the slower the speed of collecting bone marrow is. At the same time, the highest point of the initial position of the piston 70 is limited by two clamping parts 17, so the collection speed can be adjusted specifically according to the patient's condition; a first delivery tube 52 is connected to the bottom of the pump body 50, and a second delivery tube 521 is sleeved on the bottom of the first delivery tube 52. The first delivery tube 52 and the second delivery tube 521 slide relative to each other, so that when the needle tube 40 extends downward for sampling, the second delivery tube 521 also slides downward and matches the needle tube 40, and the second delivery tube 521 runs through the needle tube 40 and the bottom of the second delivery tube 521 is slightly higher than the needle 42 at the bottom of the needle tube 40.

[0031] Furthermore, if Figure 7 As shown, a first spring 522 is provided at the bottom of the second delivery tube 521, a first sphere 523 is provided at the bottom of the first spring 522, and a through hole is provided at the bottom of the second delivery tube 521 connecting to the first spring 522, so as to ensure that the blood anticoagulant can flow out of the second delivery tube 521 to the first sphere 523. When the first spring 522 is in a normal state, half of the first sphere 523 extends to the outside of the second delivery tube 521; when the pump body 50 is opened, pressure is generated in the second delivery tube 521, the first spring 522 is compressed downward and pushes the first sphere 523 out of the bottom of the second delivery tube 521, and at this time, the blood anticoagulant in the pump body 50 disperses and flows out through the top of the first sphere 523, which can not only disperse the bone marrow mixture at the needle 42, but also avoid excessive impact force causing the bone marrow mixture to rush into the bone marrow cavity.

[0032] Furthermore, if Figure 2 As shown, a notch is provided on the thick tube part 10 , and a feeding port 51 is provided on the pump body 50 . The feeding port 51 extends from the notch to the outside of the thick tube part 10 , so as to add blood anticoagulant into the pump body 50 from the outside.

[0033] During use, a bone marrow collection device for hematology provided in the present invention is specifically operated as follows: When sampling, the doctor holds the thick tube part 10 above the bone marrow puncture site, rotates the button 12 to rotate the screw rod 13 at the same time, and adjusts the position of the slider 15 and thereby the position of the piston 70 through the threaded cooperation between the outer surface of the screw rod 13 and the inner surface of the slider 15 to adjust the negative pressure to an appropriate value; then presses the limiter 31 to push the movable rod 32 downward, at which time the sleeve 33 also slides downward along the needle tube 40 and makes the pressure foot 34 fit the patient's skin to stabilize the entire device, and finally presses the button 12 to allow the needle tube 40 to be inserted vertically, at which time the button 12 pushes the screw rod 13, thereby driving the slider 15 to squeeze the piston 70, and the piston 70 drives the needle tube 40 to move downward, and the locking groove 22 on the needle tube 40 moves downward to the locking member 23, the position of the needle tube 40 is locked, and puncture is performed; if If there is a blockage during puncture, open the pump body 50, and disperse the blood anticoagulant inside it through the top of the first sphere 523 to disperse the bone marrow mixture at the needle 42; after sampling, the medical staff presses the limiter 31 with one hand to maintain the state of the presser foot 34 in contact with the patient's skin, and holds the thick tube 10 with the other hand to slide upward and move the needle tube 40 away from the puncture site, so as to achieve vertical and stable needle withdrawal and relieve the patient's pain; if the bone marrow in the storage chamber 41 needs to be discharged and tested, press the button 12, and after the first section of the spring 16 is compressed, the resistance is instantly increased when pressed, and the second section of the spring 14 is compressed. Pressing the button 12 drives the pressure plate 80 downward to abut against the top of the limit frame. At this time, the button 12 can no longer be pressed, and the bone marrow in the storage chamber 41 is completely discharged.

[0034] The above description of the embodiments is to facilitate the understanding and application of the present invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to the above embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention should be within the scope of protection of the present invention.

Claims

1. A bone marrow collection device for hematology, comprising: A thick tube part (10) and a thin tube part (20) connected to the bottom of the thick tube part (10), wherein a needle tube (40) is slidably penetrated in the thin tube part (20), characterized in that it also includes: a collection mechanism and a negative pressure adjustment mechanism; The collecting mechanism comprises: a button (12) arranged on the top of the thick tube (10) and a piston (70) abutting against the top of the needle tube (40); The negative pressure regulating mechanism is arranged between the button (12) and the piston (70), and is used to regulate the flow rate of collected bone marrow.

2. A hematology bone marrow collection device according to claim 1, characterized in that: The negative pressure regulating mechanism comprises: a screw rod (13), a slider (15) and a spring (16); The top of the screw rod (13) is connected to the button (12); The upper section of the slider (15) is threadably engaged with the lower section of the screw rod (13); The top of the spring section (16) is connected to the slider (15), and the bottom is connected to the piston (70).

3. A hematology bone marrow collection device according to claim 1, characterized in that: It also includes a flushing mechanism disposed above the needle tube (40) and penetrating the needle tube (40), the flushing mechanism comprising: a pump body (50), a first delivery tube (52), and a second delivery tube (521); The pump body (50) is arranged in the thick tube portion (10) and the bottom is connected to the first delivery pipe (52); The second delivery tube (521) is sleeved on the bottom of the first delivery tube (52), and the second delivery tube (521) passes through the needle tube (40).

4. A hematology bone marrow collection device according to claim 3, characterized in that: A first spring (522) is arranged near the bottom end of the second delivery tube (521), a first sphere (523) is arranged at the bottom of the first spring (522), and the first sphere (523) extends outside the second delivery tube (521).

5. A hematology bone marrow collection device according to claim 3, characterized in that: The thick tube portion (10) is provided with a notch, and the pump body (50) is provided with a feeding port (51), wherein the feeding port (51) extends from the notch to the outside of the thick tube portion (10).

6. A hematology bone marrow collection device according to claim 1, characterized in that: A connecting piece (11) is provided outside the thick tube portion (10), and the connecting piece (11) is used for movably connecting to the stabilizing mechanism (30).

7. A hematology bone marrow collection device according to claim 6, characterized in that: The stabilizing mechanism (30) comprises: a limiting member (31), a movable rod (32), a sleeve (33) and a plurality of presser feet (34); The limiting member (31) is arranged above the connecting member (11); The movable rod (32) is connected to the bottom of the limiting member (31) and is movably sleeved in the connecting member (11); The sleeve (33) is connected to the bottom of the movable rod (32) and is movably sleeved outside the needle tube (40), and a plurality of presser feet (34) are evenly distributed on the bottom of the sleeve (33).

8. A hematology bone marrow collection device according to claim 1, characterized in that: A locking piece (23) for limiting the position of the needle tube (40) is movably provided on the capillary portion (20), and a locking groove (22) matching the locking piece (23) is provided on the outer side wall of the needle tube (40).

9. A hematology bone marrow collection device according to claim 8, characterized in that: A cylinder (21) is vertically disposed on the capillary portion (20); one end of the locking member (23) passes through the cylinder (21) and the other end abuts against the needle tube (40) and matches the locking groove (22); a second spring (24) is disposed between the cylinder (21) and one end of the locking member (23) located inside the cylinder (21).

10. A hematology bone marrow collection device according to claim 1, characterized in that: A pressure plate (80) is provided below the button (12), and the pressure plate (80) is slidably located in the thick tube portion (10). A limit frame (18) is also provided in the thick tube portion (10), and the limit frame (18) is provided below the pressure plate (80); A two-stage spring (14) is provided between the pressure plate (80) and the position limiting frame (18).

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