Bone marrow extraction device

Abstract

The utility model discloses a bone marrow extraction device and relates to the technical field of medical instruments, the bone marrow extraction device comprises an inner core, an outer sleeve, a handle and an extraction assembly, the handle is integrally formed on the outer sleeve, the inner core movably penetrates through the outer sleeve, a through hole communicated with the outer sleeve is formed in the handle, and the extraction assembly is installed on the through hole; the extraction assembly comprises an extractor and a locking piece, the extractor is installed on the through hole, and the locking piece is detachably installed on the handle and used for locking the extractor; and the width of the concave part of the handle is greater than the diameter of the extractor. The bone marrow extractor has the advantages that shaking is reduced during bone marrow extraction, the accuracy and firmness during port butt joint are improved, and the manual extraction efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly relates to a bone marrow extraction device. Background Art

[0002] Hematological diseases are diseases that originate from the hematopoietic system and mainly affect the hematopoietic system. For many other systems with blood-related changes, they can only be called the hematological manifestations of systemic diseases. There are many causes of hematological diseases. To better determine the causes of hematological diseases, bone marrow biopsy is usually required, and a bone marrow extractor is usually needed when taking out bone marrow.

[0003] Currently, bone marrow is usually extracted from the cervical vertebrae and thoracic vertebrae. Since the vertebral bodies are too small, it is inconvenient to extract, and there is a risk of nerve injury. When the existing vacuum syringe is used for bone marrow extraction, there will be problems such as shaking and insecure docking, which affect the efficiency of manual extraction. Utility Model Content

[0004] In order to improve the problem that the puncture needle holder and the vacuum syringe are not firmly docked during the bone marrow extraction process, there is a risk of shaking, which affects the extraction efficiency. This application provides a bone marrow extraction device.

[0005] A bone marrow extraction device provided by this application adopts the following technical solutions:

[0006] A bone marrow extraction device includes an inner core, an outer sleeve, a handle, and an extraction assembly. The handle is integrally formed on the outer sleeve. The inner core is movably inserted through the outer sleeve. A through hole communicating with the outer sleeve is opened on the handle, and the extraction assembly is installed on the through hole. The extraction assembly includes an extractor and a locking member. The extractor is installed on the through hole, and the locking member is detachably installed on the handle for locking the extractor. The width of the recessed part of the handle is greater than the diameter of the extractor.

[0007] By adopting the above technical solutions, when extracting bone marrow from the lumbar vertebra, the inner core is inserted into the outer sleeve, punctured from the back of the lumbar vertebra, passes through the pedicle (the narrowest part of the vertebral body) into the vertebral body, the inner core is pulled out, and then the extractor is replaced. The extractor is placed on the recessed part of the handle, and the extractor is limited and fixed on the handle by the locking member, ensuring the firmness of the docking during extraction, avoiding the risk of shaking during extraction, effectively improving the extraction efficiency. The port of the extractor communicates with the through hole of the outer sleeve, and bone marrow is extracted from the corresponding bone marrow cavity.

[0008] Optionally, the locking member includes a locking frame and a locking bolt. The locking bolt passes through the locking frame and is in threaded cooperation with the handle. The extractor is installed in the locking frame, and the locking frame is installed on the recessed part of the handle.

[0009] By adopting the above technical solution, the locking frame limits the whole body of the extractor, facilitating the coaxial alignment of the axis of the extractor placed in the locking frame and the axis of the through hole, and fastening the locking frame to the handle with a locking bolt.

[0010] Optionally, the locking frame includes a first frame body and a second frame body, and the first frame body and the second frame body are spliced to form an annular notch, and the annular notch abuts against the outer wall of the extractor.

[0011] By adopting the above technical solution, the annular notch formed by splicing the first frame body and the second frame body abuts against the outer wall of the extractor nozzle, facilitating the extractor to remain coaxial with the handle during bone marrow extraction and improving the firmness and stability of the interface between the two.

[0012] Optionally, a tightening member for tightly pressing against the outer wall of the extractor is further installed on the first frame body and the second frame body.

[0013] By adopting the above technical solution, on the basis of the mutual splicing of the first frame body and the second frame body, a tightening member is further provided along the circumferential direction of the ring formed by their splicing, improving the tightening effect on the side wall of the extractor.

[0014] Optionally, an arc-shaped handle is integrally formed on the inner core, and the arc-shaped handle is buckled and matched with the concave part of the handle.

[0015] By adopting the above technical solution, during bone marrow puncture, the end of the arc-shaped handle pierces into the vertebra, facilitating the piercing of the vertebra and simultaneously piercing the outer sleeve into the body to reach the appropriate position.

[0016] Optionally, the outer sleeve has a diameter of 2 - 3 mm and a length of 15 - 20 mm.

[0017] By adopting the above technical solution, from the puncture point to the anterior edge of the vertebra is 5 - 7 cm, and the average diameter of the pedicle is 6 - 7 mm. The diameter of the outer sleeve is smaller than the diameter of the pedicle. Therefore, the diameter and length of the outer sleeve meet the requirement of piercing it into the body to the appropriate position of the bone marrow.

[0018] Optionally, the tightening member includes a pull rod, a spring and an arc-shaped plate. Activity frames for accommodating the displacement of the arc-shaped plate are formed on both the first frame body and the second frame body. The pull rod passes through the first frame body / the second frame body and is fixed to the arc-shaped plate. One end of the spring is fixed to the arc-shaped plate, and the other end of the spring is fixed to the first frame body / the second frame body.

[0019] By adopting the above technical solution, the pull rod, the arc-shaped plate and the spring cooperate to tightly press against the outer wall of the extractor. When the spring is not under external force, its own elastic deformation presses the arc-shaped plate against the outer wall of the sampler, and the movable frame is used to limit and guide the arc-shaped plate; when the pull rod is manually pulled out, the spring is compressed, and at the same time, the arc-shaped plate and the outer wall of the extractor move away from each other, facilitating the removal of the extractor from the circular area formed by the splicing of the first frame body and the second frame body.

[0020] Optionally, the end of the inner core away from the arc handle is spiked or conical.

[0021] By adopting the above technical solution, the sharp end of the inner core is convenient for piercing into the body to the appropriate position of the bone marrow.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. When extracting bone marrow, the inner core located inside the outer sleeve punctures the vertebra. After pulling out the inner core, replace it with an extractor, and use the locking member to improve the firmness of the connection between the extractor and the handle, reducing the shaking of the extractor, and then extract the bone marrow.

[0024] 2. Compared with traditional bone marrow extraction, the extractor is stable on the handle along with the locking member during bone marrow extraction, reducing the interface docking and stabilization work of medical staff and improving the efficiency of manual extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram showing the extractor installed on the outer sleeve in the present application.

[0027] Figure 2 It is a schematic structural diagram showing the inner core and the outer sleeve in the present application.

[0028] Figure 3 It is a schematic structural diagram showing the locked state of the extractor by the locking member in the present application.

[0029] Figure 4 It is a cross-sectional view showing the overall structure in the present application.

[0030] Figure 5 It is shown in the present application Figure 4 The enlarged view in the direction A.

[0031] Figure 6It is a cross-sectional view showing the inner core inserted into the outer sleeve in this application.

[0032] Reference numerals: 1, inner core; 2, outer sleeve; 3, handle; 4, extraction assembly; 41, locking member; 42, extractor; 5, through hole; 411, locking frame; 412, locking bolt; 4111, first frame; 4112, second frame; 6, pressing member; 7, arc handle; 61, pull rod; 62, spring; 63, arc plate; 64, movable frame. Detailed implementation manners

[0033] The following will Figures 1-6 make a further detailed description of this application in conjunction with the attached drawings.

[0034] An embodiment of this application discloses a bone marrow extraction device.

[0035] Referring to Figure 1 and Figure 2 As shown, it is composed of an inner core 1, an outer sleeve 2, a handle 3 and an extraction assembly 4. The handle 3 is integrally and fixedly formed at one end of the outer sleeve 2. The inner core 1 is movably inserted through the outer sleeve 2. A through hole 5 communicating with the outer sleeve 2 is formed in the middle of the handle 3. The extraction assembly 4 is installed on the through hole 5. The extraction assembly 4 is composed of an extractor 42 and a locking member 41. The needle hole end of the extractor 42 is inserted and matched with the through hole 5. The locking member 41 is detachably arranged on the handle 3 for locking the extractor 42. The width of the recessed part of the handle 3 is greater than the diameter of the extractor 42, which is convenient for the extractor 42 to be inserted into the through hole 5 of the recessed part of the handle 3.

[0036] When extracting bone marrow from the lumbar vertebra, the inner core 1 is inserted into the outer sleeve 2, punctured from the back of the lumbar vertebra, passed through the pedicle (the narrowest part of the vertebral body) into the vertebral body, the inner core 1 is pulled out, and then the extractor 42 is replaced. The extractor 42 is placed on the recessed part of the handle 3. The locking member 41 is used to limit and fix the extractor 42 on the handle 3, ensuring the firmness of the docking during extraction, avoiding the risk of shaking during extraction, effectively improving the extraction efficiency. The port of the extractor 42 communicates with the through hole 5 of the outer sleeve 2, and bone marrow is extracted from the corresponding bone marrow cavity.

[0037] See Figure 3 and Figure 4As shown, the locking member 41 includes a locking frame 411 and a locking bolt 412. The locking bolt 412 passes through the locking frame 411 and is in threaded fit with the handle 3. The extractor 42 is installed inside the locking frame 411. The locking frame 411 is installed in the recessed part of the handle 3. The locking frame 411 is composed of a first frame body 4111 and a second frame body 4112. The first frame body 4111 and the second frame body 4112 are spliced to form an annular notch. The annular notch abuts against the outer wall of the extractor 42. The axis of the extractor 42 is collinear with the axis of the annular notch formed by the splicing of the first frame body 4111 and the second frame body 4112, which is convenient for the accurate and firm docking of the extractor 42 and the through hole 5 on the handle 3. The inner diameter of the locking frame 411 is larger than the outer diameter of the extractor 42, which is convenient for medical staff to hold the spliced first frame body 4111, second frame body 4112 and the internal extractor 42 with one hand, and is convenient for the other hand to extract bone marrow.

[0038] See Figure 6 As shown, an arc-shaped handle 7 is also integrally formed on the inner core 1. The arc-shaped handle 7 is buckled and matched with the recessed part of the handle 3. The arc-shaped handle 7 and the handle 3 are in a shape-fitting manner, so that when the end of the inner core 1 is punctured, the relative sliding is reduced. The end of the inner core 1 away from the arc-shaped handle 7 is spiked or conical, and the front end of the inner core 1 is sharp, which is convenient for penetrating the vertebra and reaching the appropriate position. The arc-shaped handle 7 is convenient for removing the inner core 1 after its tip reaches the corresponding appropriate position.

[0039] The outer sleeve 2 has a diameter of 2 - 3 mm and a length of 15 - 20 mm. The distance from the puncture point to the anterior edge of the vertebra is 5 - 7 cm, and the average diameter of the pedicle is 6 - 7 mm. The diameter of the outer sleeve 2 is smaller than the diameter of the pedicle. Since the outer sleeve 2 operates directly on the surface of the vertebra, the problem of the patient's BMI does not need to be considered.

[0040] See Figure 4 As shown, a tightening member 6 for pressing against the outer wall of the extractor 42 is also installed on the first frame body 4111 and the second frame body 4112. In the embodiment, two, three, four or more tightening members 6 are provided on the first frame body 4111 and the second frame body 4112 according to the actual situation, and are set according to actual needs to ensure that the tightening member 6 presses against the outer side wall of the extractor 42.

[0041] See Figure 5As shown, the pressing member 6 is composed of a pull rod 61, a spring 62 and an arc-shaped plate 63. An activity frame 64 for accommodating the displacement of the arc-shaped plate 63 is formed on both the first frame body 4111 and the second frame body 4112. The activity frame 64 is in an open shape and is fixed on the first frame body 4111 / the second frame body 4112. The pull rod 61 passes through the first frame body 4111 / the second frame body 4112 and is fixed to the arc-shaped plate 63. The pull rod 61 is in sliding fit with the activity frame 64. When the arc-shaped plate 63 moves within the activity frame 64, the friction coefficient is small and can be ignored for the function in this embodiment. One end of the spring 62 is fixed to the arc-shaped plate 63, and the other end of the spring 62 is fixed to the first frame body 4111 / the second frame body 4112. The pull rod 61 located outside the first frame body 4111 / the second frame body 4112 is manually pulled, so that the spring 62 located within the activity frame 64 is compressed. The pull rod 61 drives the arc-shaped plate 63 to move away from the axis side of the first frame body 4111 and the second frame body 4112, so that the arc-shaped plate 63 releases the abutting action on the outer peripheral wall of the extractor 42; when the pull rod 61 is not affected by an external force, the elastic action of the spring 62 itself abuts the arc-shaped plate 63 connected to one end of the pull rod 61 against the outer peripheral wall of the extractor 42, so that the axis of the extractor 42 and the axis of the through hole 5 on the outer sleeve 2 are collinear, reducing the occurrence of shaking when the assembled extractor 42 is extracting, and improving the docking firmness of the extractor 42.

[0042] The implementation principle of a bone marrow extraction device in an embodiment of the present application is as follows: Before a medical staff extracts bone marrow, corresponding parts are disinfected and anesthetized in advance. The inner core 1 on the outer sleeve 2 is punctured from the back of the lumbar vertebra, enters the vertebral body through the pedicle, penetrates the vertebra to reach a suitable position, and the inner core 1 is pulled out. The first frame body 4111 and the second frame body 4112 are fastened to the recessed part of the handle 3 of the outer sleeve 2, and the extractor 42 is replaced. The arc-shaped plate 63 abuts against the outer peripheral wall of the extractor 42, so that the docking ports of the extractor 42 and the through hole 5 on the handle 3 are stably aligned, reducing the risk of shaking and effectively improving the extraction efficiency. After the bone marrow is extracted, the abutting action on the outer peripheral wall of the extractor 42 is manually released, which is convenient for taking out the extractor 42 and taking out the outer sleeve 2 together. Finally, corresponding disinfection and wound treatment are performed on the extraction site.

[0043] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings as understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second", "third" and similar terms used in the description and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. Similar terms such as "a" or "an" do not denote a quantity limitation, but rather denote the presence of at least one. Terms such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. Terms such as "upper", "lower", "left", "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0044] The above are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. A bone marrow extraction device, characterized in that: It includes an inner core (1), an outer sleeve (2), a handle (3) and a pumping component (4). The handle (3) is integrally formed on the outer sleeve (2). The inner core (1) is movably inserted through the outer sleeve (2). A through hole (5) communicating with the outer sleeve (2) is formed on the handle (3), and the pumping component (4) is installed on the through hole (5). The pumping component (4) includes a pump (42) and a locking member (41). The pump (42) is installed on the through hole (5), and the locking member (41) is detachably installed on the handle (3) for locking the pump (42). The width of the recessed part of the handle (3) is greater than the diameter of the pump (42).

2. The bone marrow extraction device according to claim 1, characterized in that: The locking member (41) includes a locking frame (411) and a locking bolt (412). The locking bolt (412) passes through the locking frame (411) and is in threaded cooperation with the handle (3). The pump (42) is installed inside the locking frame (411), and the locking frame (411) is installed in the recessed part of the handle (3).

3. The bone marrow extraction device according to claim 2, wherein: The locking frame (411) includes a first frame body (4111) and a second frame body (4112). The first frame body (4111) and the second frame body (4112) are spliced to form an annular notch, and the annular notch abuts against the outer wall of the pump (42).

4. The bone marrow extraction device according to claim 3, characterized in that: The first frame body (4111) and the second frame body (4112) are also provided with a pressing member (6) for pressing against the outer wall of the pump (42).

5. The bone marrow extraction device according to claim 1, characterized in that: An arc-shaped handle (7) is also integrally formed on the inner core (1), and the arc-shaped handle (7) is buckled and matched with the recessed part of the handle (3).

6. The bone marrow extraction device according to claim 1, characterized in that: The outer sleeve (2) has a diameter of 2 - 3 mm and a length of 15 - 20 mm.

7. The bone marrow extraction device according to claim 4, characterized in that: The pressing member (6) includes a pull rod (61), a spring (62) and an arc-shaped plate (63). An activity frame (64) for accommodating the displacement of the arc-shaped plate (63) is formed on both the first frame body (4111) and the second frame body (4112). The pull rod (61) passes through the first frame body (4111) / the second frame body (4112) and is fixed to the arc-shaped plate (63). One end of the spring (62) is fixed to the arc-shaped plate (63), and the other end of the spring (62) is fixed to the first frame body (4111) / the second frame body (4112).

8. A bone marrow extraction device according to claim 5, characterized in that: The end of the inner core (1) away from the arc-shaped handle (7) is spiked or conical.

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