Labor-saving bone marrow puncture suction appliance

Abstract

The utility model discloses a bone marrow puncture suction appliance which is labor-saving in operation. The bone marrow puncture suction appliance comprises a needle tube; the tube sleeve is elastically connected to the needle tube in a sleeving mode, a fourth positioning block is arranged at the end of the tube sleeve, and the fourth positioning block is of a kidney-shaped or oval cylinder structure; a needle core; the needle cylinder is detachably connected to the needle tube and the tube sleeve in a clamped mode and comprises a cylinder body, a driven piston arranged in a liquid storage cavity of the cylinder body in a sliding mode, a pressing piston and a linkage rod, extracted bone marrow is stored between the driven piston and the inner bottom of the cylinder body, and the middle of the linkage rod is rotationally connected to the interior of the liquid storage cavity through a rotating shaft; the distance between the rotating shaft and the driven piston is smaller than that between the rotating shaft and the pressing piston. Compared with common related products, the size of the needle tube is designed, so that the needle tube can be conveniently inserted into the bone marrow of a patient and butted with the bone marrow of the patient; the needle tube and the tube sleeve are movable, so that the needle core is convenient to disassemble and assemble; bone marrow suction adopts pressing operation, so that severe pain of a patient caused by instrument shaking is reduced, and the bone marrow suction operation is more labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of bone marrow puncture, in particular to a bone marrow puncture aspiration device that is labor-saving in operation. Background Art

[0002] Malignant tumors of the hematopoietic system are one of the most common cancers, and their incidence and mortality rates are both among the top ten of malignant tumors. It is worth noting that globally, the number of incident cases of malignant tumors of the hematopoietic system has been increasing since 1990, reaching 1.34385 million cases in 2019. However, the age-standardized death rate (ASDR) of all types of malignant tumors of the hematopoietic system has been declining, which indicates the progress of treatment methods and the effectiveness of preventive measures. In particular, allogeneic hematopoietic stem cell transplantation is an indispensable method for curing hematopoietic system diseases at present, and the collection and reinfusion of bone marrow cells to supplement mesenchymal stem cells can improve the engraftment of blood cells. Clinically, about 400 ml of bone marrow cells of donors are generally collected in the operating room, and a large amount of physical strength is required for bone marrow collection. As a routine diagnostic and treatment method for hematopoietic system diseases, the daily volume of bone marrow puncture is large.

[0003] Bone marrow puncture generally uses a bone marrow puncture needle to collect bone marrow samples. The steps are as follows: insert the stylet into the puncture needle, insert the puncture needle into the patient's body, pull out the stylet, connect the syringe to the tail end of the puncture needle, aspirate the bone marrow sample through the syringe, pull out the syringe, reinsert the stylet into the puncture needle, and then pull out the puncture needle.

[0004] In actual operation, due to the design of the size of conventional bone marrow puncture instruments, it is difficult to insert the needle tube and dock it with the patient's bone marrow; when separating the stylet and the puncture needle, it is necessary to insert the gap at the end of the two to remove the stylet, which is difficult to operate under the operating conditions that require wearing medical gloves; when aspirating bone marrow, the operation method of holding the syringe barrel with one hand and pulling the piston with the other hand has poor convenience and stability, and the instrument is prone to shaking, resulting in severe pain for the patient. In addition, clinically, patients with dry aspiration during bone marrow puncture are often encountered. The above-mentioned conventional instruments are difficult and laborious to operate, and the operating physicians often have insufficient arm strength at the end of the operation. Moreover, there are mostly female physicians in the hematology department, which is a challenge for them. Therefore, it is necessary to improve the bone marrow puncture instrument for convenient collection. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a bone marrow puncture aspiration device that is labor-saving in operation to solve the problems that when operating common bone marrow puncture aspiration instruments, it is difficult to insert the needle tube and dock it with the patient's bone marrow, it is difficult to separate the stylet and the puncture needle, the convenience and stability of bone marrow aspiration operation are poor, the instrument is prone to shaking, resulting in severe pain for the patient, and the overall operation is laborious.

[0006] To achieve the above object, the utility model adopts the following technical solutions: A bone marrow puncture aspiration device with labor-saving operation, comprising:

[0007] A syringe, on which a locator is provided;

[0008] A sleeve, which is elastically sleeved on the syringe, and a fourth positioning block is provided at the end, and the fourth positioning block is in the structure of a waist-shaped or oval column;

[0009] A stylet, which is detachably inserted into the infusion inner cavity of the syringe, and the top abuts against the sleeve;

[0010] A syringe barrel, which is detachably clamped on the syringe and the sleeve, and comprises a barrel body, a driven piston, a pressing piston and a linkage rod slidably arranged in the liquid storage cavity of the barrel body. The bone marrow extracted between the driven piston and the inner bottom of the barrel body is stored. The middle part of the linkage rod is rotationally connected in the liquid storage cavity through a rotating shaft. The distance between the rotating shaft and the driven piston is less than the distance between the rotating shaft and the pressing piston. The end of the linkage rod is slidably connected to the end faces of the driven piston and the pressing piston.

[0011] As a further description of the above technical solution:

[0012] External threads are provided on the syringe, and the locator is screwed on the external threads.

[0013] As a further description of the above technical solution:

[0014] The overall length of the syringe and the sleeve is 16-18 cm.

[0015] As a further description of the above technical solution:

[0016] The difference between the major axis dimension and the minor axis dimension of the fourth positioning block is 0.5-1 cm.

[0017] As a further description of the above technical solution:

[0018] The syringe comprises a syringe body and a first positioning block. The syringe body is inserted into the syringe hole of the sleeve. An activity groove extends laterally from the syringe hole. A slider on the side of the syringe body is slidably connected in the activity groove. An elastic member is arranged between the slider and the side of the activity groove away from the puncture end of the syringe body. The first positioning block is embedded and abutted in the groove on the end face of the sleeve.

[0019] As a further description of the above technical solution:

[0020] A connection seat is provided at the bottom of the syringe barrel. A stepped groove is provided on the bottom surface of the connection seat. The stepped groove is detachably sleeved and clamped on the third positioning block and the fourth positioning block at the top of the stylet.

[0021] As a further description of the above technical solution:

[0022] The needle core includes a needle core body and a second positioning block, and the second positioning block is detachably sleeved on the third positioning block.

[0023] As a further description of the above technical solution:

[0024] The linkage rod includes a sleeve sleeved on the rotating shaft and a connecting rod outside the sleeve.

[0025] As a further description of the above technical solution:

[0026] A ball shaft is arranged at the end of the linkage rod, and the ball shafts at both ends are respectively slidably connected in a first spherical guide groove and a second spherical guide groove on the opposite surfaces of the driven piston and the pressing piston. A pressing rod is arranged at the end of the pressing piston.

[0027] As a further description of the above technical solution:

[0028] A plurality of linkage rods are provided. The rotating shaft is of an annular structure, and the plurality of linkage rods are arranged at equal intervals in the circumferential direction along the annular structure. The annular structure is connected to the inside of the cylinder through an outer rod.

[0029] In summary, due to the adoption of the above technical solution, the present utility model has the following

[0030] Advantages:

[0031] Compared with common related products, the present bone marrow puncture aspiration device adopts a movable design of the needle tube and the tube sleeve, which is convenient for the disassembly and assembly of the needle core; the positioner can adjust the insertion amount of the needle tube in the patient's body to ensure the accurate docking of the needle tube and the bone marrow, and ensure that the puncture operation is completed at one time; the bone marrow aspiration abandons the common operation mode and structure of holding the syringe with one hand and pulling the piston with the other hand, adopts a pressing operation, and the size design of the needle tube and the tube sleeve improves the convenience and stability of the operation to reduce the severe pain of the patient caused by the shaking of the device; through the lever principle, the piston pressing operation design is carried out, making the bone marrow aspiration operation more labor-saving. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0033] Figure 1Schematic diagram of the assembly structure of the syringe tube, sleeve, needle core and locator in a bone marrow puncture aspiration device with labor-saving operation.

[0034] Figure 2 Cross-sectional view of the assembly structure of the syringe tube, sleeve and needle core in a bone marrow puncture aspiration device with labor-saving operation.

[0035] Figure 3 Usage state diagram when the needle core is removed from the assembly structure of the syringe tube, sleeve and needle core in a bone marrow puncture aspiration device with labor-saving operation.

[0036] Figure 4 Exploded view of the structures of the syringe tube, sleeve and needle core in a bone marrow puncture aspiration device with labor-saving operation.

[0037] Figure 5 Cross-sectional view of the assembly structure of the syringe tube, sleeve and barrel in a bone marrow puncture aspiration device with labor-saving operation.

[0038] Figure 6 Cross-sectional view of the usage state during bone marrow extraction of the assembly structure of the syringe tube, sleeve and barrel in a bone marrow puncture aspiration device with labor-saving operation.

[0039] Legend:

[0040] 1. Syringe tube; 11. Syringe tube body; 12. First positioning block; 13. Third positioning block; 14. Slide block; 15. External thread; 2. Sleeve; 21. Activity groove; 22. Elastic member; 23. Fourth positioning block; 3. Needle core; 31. Needle core body; 32. Second positioning block; 4. Locator; 5. Barrel; 51. Cylinder body; 511. Connecting seat; 512. Step-shaped groove; 513. Liquid storage cavity; 514. Rotating shaft; 52. Driven piston; 521. First spherical guide groove; 53. Pressing piston; 531. Pressing rod; 532. Second spherical guide groove; 54. Linkage rod; 541. Sleeve; 542. Link; 543. Ball shaft. Detailed implementation mode

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0042] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model.

[0043] Please refer to Figure 1-6 , the present utility model provides a technical solution: a bone marrow puncture aspiration device that is labor-saving in operation, including:

[0044] A syringe 1, on which a locator 4 is provided;

[0045] A sleeve 2, which is elastically sleeved on the syringe 1, and a fourth positioning block 23 is provided at the end. The fourth positioning block 23 is a waist-shaped or oval cylindrical structure;

[0046] A stylet 3, which is detachably inserted into the infusion inner cavity of the syringe 1, and its top abuts against the sleeve 2;

[0047] A syringe barrel 5, which is detachably clamped on the syringe 1 and the sleeve 2, and includes a barrel body 51, a driven piston 52 slidably arranged in the liquid storage cavity 513 of the barrel body 51, a pressing piston 53 and a linkage rod 54. The bone marrow to be aspirated is stored between the driven piston 52 and the inner bottom of the barrel body 51. The middle of the linkage rod 54 is rotatably connected in the liquid storage cavity 513 through a rotating shaft 514. The distance between the rotating shaft 514 and the driven piston 52 is less than its distance from the pressing piston 53. The end of the linkage rod 54 is slidably connected to the end faces of the driven piston 52 and the pressing piston 53.

[0048] In addition, scale lines are provided on the barrel body 51, and a sliding structure with a limited length of a slider and a chute is provided between one side of the pressing piston 53 and the barrel body 51, so as to realize the micro-controlled aspiration of 0.1 - 0.2 ml of bone marrow.

[0049] Compared with common related products, this bone marrow puncture aspiration device adopts a movable design of the syringe and the sleeve, which is convenient for the disassembly and assembly of the stylet; the locator can adjust the insertion amount of the syringe in the patient's body, ensure the accurate docking of the syringe and the bone marrow, and ensure that the puncture operation is completed at one time; the bone marrow aspiration abandons the common operation method and structure of holding the syringe barrel with one hand and pulling the piston with the other hand, adopts a pressing operation, and the size design of the syringe and the sleeve improves the convenience and stability of the operation, so as to reduce the severe pain of the patient caused by the shaking of the device; through the lever principle, a piston pressing operation design is carried out, making the bone marrow aspiration operation more labor-saving.

[0050] The syringe tube 1 is provided with an external thread 15, and the locator 4 is screwed onto the external thread 15. By rotating the locator 4, the adjustment of the distance between it and the puncture end of the syringe tube 1 can be realized. Furthermore, based on the determination of the thickness of the patient's body structure on the outer layer of the patient's body bones, the insertion amount of the syringe tube 1 into the patient's body is adjusted to ensure the accurate docking of the syringe tube with the bone marrow.

[0051] The elastic movable structure of the syringe tube 1 and the tube sleeve 2 is specifically as follows: The syringe tube 1 includes a syringe tube main body 11 and a first positioning block 12. The syringe tube main body 11 is inserted into the syringe tube hole of the tube sleeve 2. A movable groove 21 extends laterally from the syringe tube hole, and a slider 14 on the side of the syringe tube main body 11 is slidably connected in the movable groove 21. An elastic member 22 is provided between the slider 14 and the side of the movable groove 21 away from the puncture end of the syringe tube main body 11. The first positioning block 12 is embedded and abutted in the groove on the end face of the tube sleeve 2. For common instruments, the needle core 3 needs to be inserted into the gap between the tube sleeve 2 to remove the needle core 3, which is difficult to operate under the operating conditions where medical gloves need to be worn. However, the above design of the present utility model enables the needle core 3 to protrude when the tube sleeve 2 is pressed during the removal of the needle core 3, and it can be quickly pulled out, with simple operation.

[0052] A connecting seat 511 is provided at the bottom of the syringe barrel 5. A stepped groove 512 is provided on the bottom surface of the connecting seat 511, and the stepped groove 512 is detachably sleeved and clamped on the third positioning block 13 and the fourth positioning block 23 at the top of the needle core 3.

[0053] The overall length of the syringe tube 1 and the tube sleeve 2 is 16 - 18 cm. The difference between the major axis dimension and the minor axis dimension of the fourth positioning block 23 is 0.5 - 1 cm.

[0054] Among them, in this embodiment, the length of the syringe tube 1 is shortened to 17 cm compared with the standard length of the common bone marrow puncture needle standard part. The fourth positioning block 23 of the plastic tube sleeve 2 at the end of the syringe tube 1 is widened on a single axis, and the widened length is 0.5 - 1 cm, so that the fourth positioning block 23 presents a waist-shaped or oval structure. The size design of this syringe tube and tube sleeve can improve the assembly and positioning stability and efficiency with the needle core 3 and the syringe barrel 5, and reduce the shaking of the instruments during the bone marrow aspiration operation, ensuring the convenience, labor-saving of the operation, and low pain level of the patient. An elastic sealing ring is provided at the connection between the connecting seat 511 and the inner cavity of the third positioning block 13, so that when the pressing piston 53 is pressed, the sealing ring opens and the bone marrow is drawn in. When not pressed, the sealing ring closes to avoid cross-contamination between the liquid storage cavity 513 and the external environment.

[0055] The needle core 3 includes a needle core main body 31 and a second positioning block 32. The second positioning block 32 is detachably sleeved on the third positioning block 13. Among them, the size of the second positioning block 32 is larger than the size of the first positioning block 12.

[0056] The linkage rod 54 includes a sleeve 541 sleeved on the rotating shaft 514 and a connecting rod 542 outside the sleeve 541. The rotating shaft 514 and the connecting rod 542 should be made of high-strength materials to achieve efficient synchronous movement of the two pistons during bone marrow aspiration, enabling efficient and precise aspiration volume of bone marrow with quick operation.

[0057] To further improve the stability of the synchronous movement of the linkage rod 54 with the pressing operation of the pressing piston 53, a ball shaft 543 is provided at the end of the linkage rod 54. The two ball shafts 543 at both ends are respectively slidably connected in a first spherical guide groove 521 and a second spherical guide groove 532 on the opposite surfaces of the driven piston 52 and the pressing piston 53. A pressing rod 531 is provided at the end of the pressing piston 53.

[0058] In an embodiment not shown in another figure, a plurality of the linkage rods 54 are provided. The rotating shaft 514 is of an annular structure, and the plurality of linkage rods 54 are arranged at equal intervals along the circumferential direction of the annular structure. The annular structure is connected to the inside of the cylinder 51 through an outer rod. The above design can further improve the labor-saving degree of the operation of the syringe 5.

[0059] The working principle of a bone marrow puncture aspiration device with labor-saving operation in this embodiment includes: during bone marrow puncture aspiration operation, first hold the second positioning block 32 and the tube sleeve 2 by hand, and press the needle core 3 into the needle tube 1 from the hole of the third positioning block 13, as Figure 2 shown; based on the determination of the thickness of the patient's body structure on the outer layer of the patient's body bones, rotate the positioner 4 to adjust the exposed length of the needle tube 1, as Figure 1 shown; hold the tube sleeve 2 and press the needle core 3 to press the needle tube body 11 into the patient's bone marrow, and the positioner 4 abuts against the patient's skin; hold the positioner 4 with one hand and press the tube sleeve 2 with the other hand to expose the second positioning block 32, then the needle core 3 can be pulled out by holding the second positioning block 32, as Figure 3 shown; hold the tube sleeve 2 to perform the snap-fit positioning assembly of the connecting seat 511 of the syringe 5 with the needle tube 1 and the tube sleeve 2, as Figure 5 shown; then perform bone marrow aspiration. Press the pressing rod 531 to move the pressing piston 53 inward. Through the rotation of the linkage rod 54, drive the driven piston 52 to move outward, so that the liquid storage cavity 513 performs micro-quantitative extraction of bone marrow. After completion, pull out the syringe 5, press the needle core 3 back into the needle tube 1, pull out the whole structure, and perform wound treatment on the patient.

[0060] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent replacements or changes, and should be covered by the protection scope of the present invention.

Claims

1. A bone marrow puncture aspiration device that is labor-saving in operation, characterized in that, Comprising: A syringe needle, on which a locator is provided; A sleeve, which is elastically sleeved on the syringe needle, and a fourth positioning block is provided at the end, and the fourth positioning block is in a waist-shaped or oval cylindrical structure; A plunger, which is detachably inserted into the infusion inner cavity of the syringe needle, and the top abuts against the sleeve; A syringe barrel, which is detachably clamped on the syringe needle and the sleeve, and includes a barrel body, a driven piston slidably arranged in the liquid storage cavity of the barrel body, a pressing piston and a linkage rod. The bone marrow extracted between the driven piston and the inner bottom of the barrel body is stored. The middle part of the linkage rod is rotatably connected in the liquid storage cavity through a rotating shaft. The distance between the rotating shaft and the driven piston is less than the distance between the rotating shaft and the pressing piston. The end of the linkage rod is slidably connected to the end faces of the driven piston and the pressing piston.

2. The bone marrow puncture aspiration device with labor-saving operation according to claim 1, characterized in that, External threads are provided on the syringe needle, and the locator is screwed on the external threads.

3. The bone marrow puncture aspiration device with labor-saving operation according to claim 1, wherein, The overall length of the syringe needle and the sleeve is 16 - 18 cm.

4. The bone marrow puncture aspiration device with labor-saving operation according to claim 1, characterized in that The difference between the major axis dimension and the minor axis dimension of the fourth positioning block is 0.5 - 1 cm.

5. An aspiration device for bone marrow puncture that is labor-saving in operation, characterized in that, The syringe needle includes a syringe needle body and a first positioning block. The syringe needle body is inserted into the syringe needle hole of the sleeve. The syringe needle hole extends laterally with a movable groove. A slider on the side of the syringe needle body is slidably connected in the movable groove. An elastic member is provided between the slider and the side of the movable groove away from the puncture end of the syringe needle body. The first positioning block is embedded and abuts against the groove on the end face of the sleeve.

6. The bone marrow puncture aspiration device with labor-saving operation according to claim 1, wherein, A connecting seat is provided at the bottom of the syringe barrel. A stepped groove is provided on the bottom surface of the connecting seat. The stepped groove is detachably sleeved and clamped on the third positioning block and the fourth positioning block at the top of the plunger.

7. An aspiration device for bone marrow puncture with labor-saving operation according to claim 6, characterized in that, The plunger includes a plunger body and a second positioning block. The second positioning block is detachably sleeved on the third positioning block.

8. The bone marrow puncture aspiration device with labor-saving operation according to claim 1, wherein The linkage rod includes a sleeve sleeved on the rotating shaft and a connecting rod outside the sleeve.

9. The bone marrow puncture aspiration device with labor-saving operation according to claim 1, characterized in that, Ball shafts are provided at the ends of the linkage rod. The two ball shafts at both ends are respectively slidably connected in the first spherical guide groove and the second spherical guide groove on the opposite faces of the driven piston and the pressing piston. A pressing rod is provided at the end of the pressing piston.

10. The bone marrow puncture aspiration device with labor-saving operation according to claim 1, wherein A plurality of linkage rods are provided. The rotating shaft is in a ring structure. The plurality of linkage rods are arranged equidistantly along the circumference of the ring structure. The ring structure is connected to the inside of the barrel body through an outer rod.

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