Bone marrow biopsy puncture sampling device for hematology department

Abstract

The invention relates to the technical field of medical instruments, and discloses a hematology department bone marrow biopsy puncture sampling device which comprises a handheld seat. The trocar is fixedly mounted on the handheld seat, and a rectangular opening is formed in the surface of the bottom of the trocar; the needle body is inserted into the trocar, a rectangular groove matched with the rectangular opening is formed in the surface of the needle body, and a precisely machined sharp cutting edge is designed on the edge of the rectangular groove; according to the bone marrow biopsy puncture sampling device for the hematology department, the sealed cavity is formed through dislocation after sampling is completed, tissue is wrapped in the groove and prevented from making contact with path tissue chippings on the surface of the trocar, sample pollution is reduced from the source, the problem that in a traditional device, path tissue is mixed into biopsy samples is solved, and the pollution condition is reduced; meanwhile, the isolation sleeve is clamped in the annular clamping groove through the elastic buckle piece and is taken out along with the needle body, so that impurities in the external environment are prevented from polluting a sample, and tissue fragments are prevented from falling into the external environment.

Description

Technical Field

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

[0002] In clinical hematology, bone marrow biopsy is a key method for diagnosing diseases such as leukemia, multiple myeloma, and myelodysplastic syndrome. Its core is to obtain uncontaminated bone marrow tissue samples to ensure the accuracy of pathological analysis results. However, existing bone marrow biopsy sampling devices often lead to sample contamination during the tissue extraction process due to structural design defects, which has become a major problem restricting diagnostic accuracy.

[0003] Currently, when the trocar is inserted from the skin into the bone marrow cavity, it will pass through non-bone marrow tissues such as subcutaneous tissue and cortical bone. When the trocar is pulled out, the surface of the trocar and the biopsy tissue may carry tissue debris along these paths and come into contact with the bone marrow tissue in the biopsy groove, causing contamination. It is also easy to contaminate the external environment or fall off, reducing the purity of the sample. Therefore, we have proposed a hematology bone marrow biopsy puncture sampling device to solve the above problems. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a hematology bone marrow biopsy puncture sampling device, which solves the problem in the existing technology that the cannula needle passes through non-bone marrow tissue during puncture, resulting in the surface and biopsy tissue being easily carried with path tissue debris when pulled out, causing bone marrow tissue contamination in the biopsy groove, and easily contaminating the external environment or causing the sample to fall, thereby reducing the purity of the sample.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A hematology bone marrow biopsy puncture sampling device, comprising a handheld seat;

[0006] A trocar is fixedly mounted on the handheld base, and a rectangular opening is formed on the bottom surface of the trocar;

[0007] The needle body is inserted into the trocar, and a rectangular groove matching the rectangular opening is provided on the surface of the needle body, and the edge of the rectangular groove is designed with a precisely machined sharp edge;

[0008] A needle seat, fixedly mounted on the top end of the needle body;

[0009] The isolation sleeve is located on the top of the handheld base and is sleeved on the outside of the needle body. The surface of the isolation sleeve is provided with multiple groups of elastic buckles, and the surface of the needle body is provided with an annular groove adapted to the elastic buckles;

[0010] an annular magnet, provided on the handheld seat;

[0011] A locking mechanism is installed on the hand-held seat for locking the needle seat.

[0012] Preferably, the needle body is adapted to and tightly fits the inner cavity of the trocar, and the top end of the needle body extends to the outside of the trocar.

[0013] Preferably, the isolating sleeve is made of a magnetic material, the hand-held seat is provided with an annular groove adapted to the annular magnet, and the annular magnet is located in the annular groove and fixedly connected with the hand-held seat.

[0014] Preferably, the bottom of the hand-held seat is rotatably installed with a movable seat through a bearing, the movable seat is provided with a through hole in the center, and the diameter of the through hole is greater than the external diameter of the trocar, and the top of the needle seat is fixedly installed with a hexagonal clamping sleeve.

[0015] Preferably, the top of the hand-held seat is provided with a socket groove adapted to the needle seat, the bottom of the needle seat is provided with a first installation groove, and the needle seat is fixedly installed with a second magnet in the form of an annular structure in the installation groove, the hand-held seat is provided with a second installation groove corresponding to the first installation groove, and the hand-held seat is fixedly installed with a first magnet in the second installation groove.

[0016] Preferably, the first magnet and the second magnet are of opposite magnetic poles.

[0017] Preferably, the locking mechanism comprises lock plates arranged symmetrically on the hand-held seat, the lock plates are rotatably connected with the hand-held seat through a rotating shaft, a reset torsional spring is sleeved on the rotating shaft and arranged symmetrically, the surface of the needle seat is provided with a first clamping groove adapted to the lock plate, and the needle seat is provided with a second clamping groove adapted to the lock plate at a 45° angle position of the first clamping groove.

[0018] Preferably, the hand-held seat is provided with a movable opening adapted to the lock plate, and the lock plate is movable in the movable opening, and the two ends of the reset torsional spring are fixedly connected with the lock plate and the hand-held seat, respectively.

[0019] Preferably, the needle seat is provided with a mark strip at the top of the second clamping groove, for distinguishing the first clamping groove and the second clamping groove.

[0020] Preferably, when the lock plate is clamped in the first clamping groove, the rectangular groove of the needle body is sealed and misaligned with the rectangular opening of the trocar, and when the lock plate is clamped in the second clamping groove, the rectangular groove of the needle body corresponds to the rectangular opening of the trocar.

[0021] Beneficial effects

[0022] The application provides a blood marrow biopsy puncture sampling device.

[0023] The hematology bone marrow biopsy puncture sampling device forms a sealed cavity by staggering after sampling is completed, wrapping the tissue in the groove to prevent it from contacting the path tissue debris on the surface of the cannula needle, reducing sample contamination at the source, and solving the problem of path tissue mixing into the biopsy sample in traditional devices, reducing contamination. At the same time, the isolation sleeve is clamped in the annular groove by an elastic buckle and is taken out with the needle body, forming a physical shielding for the tissue in the rectangular groove, preventing impurities in the external environment from contaminating the sample, and preventing tissue debris from falling into the external environment, such as the operating table and skin surface, solving the problem of samples easily falling and polluting the environment in traditional devices, further improving the practicality and flexibility of the device to meet actual use needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 A partial cross-sectional view of the trocar and needle body structure of the present invention;

[0026] Figure 3 It is a cross-sectional view of the structure of the present invention as a whole;

[0027] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at point A;

[0028] Figure 5 This is a schematic diagram of the separation structure of the trocar and the needle body structure of the present invention;

[0029] Figure 6 Schematic diagram of the isolation sleeve and elastic buckle structure of the present invention

[0030] Figure 7 For the present invention Figure 5 Schematic diagram of the enlarged structure at point B.

[0031] In the figure: 101, hand-held seat; 102, trocar; 103, movable seat; 104, needle seat; 105, hexagonal ferrule seat; 106, needle body; 107, rectangular opening; 108, rectangular groove; 109, annular slot; 110, first magnet; 111, second magnet; 112, annular magnet; 113, isolation sleeve; 114, elastic buckle; 2, locking mechanism; 201, locking plate; 202, reset torsion spring; 203, first slot; 204, second slot. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] like Figure 1-7 As shown:

[0034] A bone marrow biopsy puncture sampling device for hematology, comprising a handheld seat 101;

[0035] The trocar 102 is fixedly mounted on the handheld base 101, and a rectangular opening 107 is formed on the bottom surface of the trocar 102;

[0036] The needle body 106 is inserted into the trocar 102, and a rectangular groove 108 is formed on the surface of the needle body 106 to match the rectangular opening 107. The edge of the rectangular groove 108 is designed with a precision-machined sharp edge. The needle body 106 is adapted to and fits tightly with the inner cavity of the trocar 102, and the top of the needle body 106 extends to the outside of the trocar 102.

[0037] The needle seat 104 is fixedly mounted on the top of the needle body 106;

[0038] The isolation sleeve 113 is located on the top of the hand-held base 101 and is sleeved on the outside of the needle body 106. The surface of the isolation sleeve 113 is provided with multiple groups of elastic buckles 114. The surface of the needle body 106 is provided with an annular groove 109 adapted to the elastic buckle 114. The isolation sleeve 113 is made of a magnetically attracted material, such as iron. The annular magnet 112 is provided on the hand-held base 101. The hand-held base 101 is provided with an annular groove adapted to the annular magnet 112. The annular magnet 112 is located in the annular groove and is fixedly connected to the hand-held base 101.

[0039] A movable seat 103 is rotatably mounted on the bottom of the handheld seat 101 via a bearing. A through hole is provided at the center of the movable seat 103, and the diameter of the through hole is larger than the outer diameter of the trocar 102. A hexagonal ferrule seat 105 is fixedly mounted on the top outer surface of the needle seat 104.

[0040] A socket slot adapted to the needle holder 104 is provided on the top of the hand-held holder 101, a first mounting slot is provided on the bottom of the needle holder 104, and a second magnet 111 arranged in a ring structure is fixed in the mounting slot of the needle holder 104, a second mounting slot corresponding to the first mounting slot is provided on the hand-held holder 101, and a first magnet 110 is fixed in the second mounting slot of the hand-held holder 101, and the first magnet 110 and the second magnet 111 have opposite magnetic poles;

[0041] The locking mechanism 2 is installed on the handheld seat 101 and is used for locking the needle seat 104. The locking mechanism 2 comprises symmetrically arranged locking plates 201 arranged on the handheld seat 101 and rotationally connected to the handheld seat 101 through a rotating shaft. A reset torsion spring 202 is sleeved on the rotating shaft in a symmetrically arranged manner. The surface of the needle seat 104 is provided with a first clamping groove 203 matched with the locking plate 201. The needle seat 104 is provided with a second clamping groove 204 at a 45° angle position of the first clamping groove 203. The handheld seat 101 is provided with a movable opening matched with the locking plate 201, and the locking plate 201 is movably arranged in the movable opening. The two ends of the reset torsion spring 202 are fixedly connected with the locking plate 201 and the handheld seat 101. The needle seat 104 is provided with a mark strip at the top of the second clamping groove 204, which is used for distinguishing the first clamping groove 203 and the second clamping groove 204. When the locking plate 201 is clamped in the first clamping groove 203, the rectangular groove 108 of the needle body 106 is sealed and misaligned with the rectangular opening 107 of the trocar 102. When the locking plate 201 is clamped in the second clamping groove 204, the rectangular groove 108 of the needle body 106 corresponds to the rectangular opening 107 of the trocar 102.

[0042] As shown in the drawings: Figure 2 In this embodiment, the blood marrow biopsy puncture sampling device. In the initial state of use, the locking plate 201 of the locking mechanism 2 is clamped into the first clamping groove 203 of the needle seat 104 under the elastic force of the reset torsion spring 202. At this time, the rectangular groove 108 of the needle body 106 is in a sealed and misaligned state with the rectangular opening 107 of the trocar 102. The rectangular opening 107 is blocked by the solid surface of the needle body 106, so as to avoid the path tissue from entering the sampling area during the puncture process.

[0043] As shown in the drawings: Figure 3-4 The second magnet 111 at the bottom of the needle seat 104 and the first magnet 110 of the handheld seat 101 are attracted to each other in a repulsive manner. The magnetic attraction limits the up and down shaking of the needle seat 104, ensures the stability of the relative position of the rectangular opening 107 and the rectangular groove 108, and temporarily locks the position of the isolation sleeve 113 by attracting and fixing the isolation sleeve 113 to the top of the handheld seat 101 by the annular magnet 112. The anti-dropping force of the elastic buckle 114 buckled in the annular clamping groove 109 is greater than the attraction force of the isolation sleeve 113 and the annular magnet 112.

[0044] The operator holds the handheld base 101 and uses the sharp end of the trocar 102 to penetrate the skin, subcutaneous tissue, and cortical bone until it reaches the vicinity of the bone marrow cavity. When holding the movable base 103, it is rotatably connected to the handheld base 101 through a bearing, and the trocar 102 can be rotated. The sharp end of the trocar 102 can gradually penetrate the cortical bone through a rotary cutting action. Compared with simple linear advancement, it can disperse the puncture pressure and reduce the tearing damage to the bone and surrounding soft tissue. It is particularly suitable for bone marrow biopsy in children or patients with osteoporosis, reducing postoperative pain or bleeding risks and better insertion.

[0045] When the trocar 102 approaches the medullary cavity, the locking plate 201 of the locking mechanism 2 is pressed to disengage it from the first slot 203. At the same time, the needle holder 104 is rotated by the hexagonal ferrule 105 to adjust the angle by 45 degrees, so that the locking plate 201 corresponds to the second slot 204. At this time, the reset torsion spring 202 is in elastic torsion. When the locking plate 201 is released, the reset torsion spring 202 is elastically reset, driving the two sets of locking plates 201 to be clamped into the second slot 204. A marking strip is provided on the second slot 204 to facilitate the driving of the first slot 203 and the second slot 204, so that the correspondence between the rectangular opening 107 and the rectangular slot 108 can be understood in real time. When the locking plate 201 is clamped in the second slot 204, the rectangular slot 108 of the needle body 106 accurately corresponds to the rectangular opening 107 of the trocar 102, and the rectangular opening 107 is completely exposed.

[0046] The trocar 102 is pushed into the bone marrow cavity by 1-1.5 cm, and the bone marrow tissue enters the rectangular groove 108 of the needle body 106 through the rectangular opening 107. Since the edge of the rectangular groove 108 is a precisely machined sharp edge, when the needle seat 104 is rotated, the edge can cut off the connection between the tissue and the surrounding area, ensuring that the tissue is completely embedded in the groove. After the tissue is embedded, the needle seat 104 is rotated in the opposite direction, and the rectangular groove 108 and the rectangular opening 107 are misaligned again to form a sealed cavity. The rectangular groove 108 fits with the side wall of the trocar 102, wrapping the tissue in the cavity to prevent tissue shedding or contamination during the sampling process;

[0047] When the surgeon holds the needle holder 104 and pulls out the needle body 106, the annular groove 109 on the surface of the needle body 106 contacts the elastic buckle 114 of the isolation sleeve 113. The elastic buckle 114 is squeezed and then bounces into the annular groove 109 and gets stuck, and the isolation sleeve 113 is pulled out together with the needle body 106. After the isolation sleeve 113 is pulled out with the needle body 106, it completely wraps the rectangular groove 108 area of ​​the needle body 106, forming a physical shield for the extracted tissue, preventing the external environment, such as air, impurities in the operating table from contaminating the sample; at the same time, it prevents tissue debris from falling, reducing pollution to the external environment, and thus completing tissue sampling;

[0048] In this solution, after sampling is completed, the tissue is staggered to form a sealed cavity, and the tissue is wrapped in the groove to prevent it from contacting the path tissue debris on the surface of the cannula needle 102, reducing sample contamination from the source, and solving the problem of path tissue mixing into biopsy samples in traditional devices, reducing contamination. At the same time, the isolation sleeve 113 is clamped in the annular groove 109 by the elastic buckle 114 and is taken out together with the needle body 106, forming a physical shield for the tissue in the rectangular groove 108, preventing impurities in the external environment from contaminating the sample, and preventing tissue debris from falling into the external environment, such as the operating table and skin surface, solving the problem of samples easily falling and polluting the environment in traditional devices, further improving the practicality and flexibility of the device, and meeting actual use needs.

[0049] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A bone marrow biopsy puncture sampling device for hematology, characterized by: comprising a handheld holder (101); A trocar (102) is fixedly mounted on the handheld seat (101), and a rectangular opening (107) is provided on the bottom surface of the trocar (102); The needle body (106) is inserted into the trocar (102), and a rectangular groove (108) adapted to the rectangular opening (107) is provided on the surface of the needle body (106), and the edge of the rectangular groove (108) is designed with a precisely machined sharp edge; A needle seat (104) is fixedly mounted on the top of the needle body (106); An isolation sleeve (113) is located on the top of the handheld seat (101) and is sleeved on the outside of the needle body (106). The surface of the isolation sleeve (113) is provided with multiple groups of elastic buckles (114). The surface of the needle body (106) is provided with an annular groove (109) adapted to the elastic buckles (114); An annular magnet (112) is provided on the handheld base (101); The locking mechanism (2) is mounted on the handheld seat (101) and is used to limit and lock the needle seat (104).

2. The hematology bone marrow biopsy puncture sampling device according to claim 1, characterized in that: The needle body (106) is adapted to and fits tightly with the inner cavity of the trocar (102), and the top end of the needle body (106) extends to the outside of the trocar (102).

3. The hematology bone marrow biopsy puncture sampling device according to claim 1, characterized in that: The isolation sleeve (113) is made of a magnetically attracted material, and an annular groove adapted to the annular magnet (112) is provided on the hand-held seat (101), and the annular magnet (112) is arranged in the annular groove.

4. The hematology bone marrow biopsy puncture sampling device according to claim 1, characterized in that: A movable seat (103) is rotatably mounted on the bottom of the hand-held seat (101) via a bearing. A through hole is provided at the center of the movable seat (103), and the diameter of the through hole is larger than the outer diameter of the trocar (102). A hexagonal ferrule seat (105) is fixedly mounted on the top peripheral surface of the needle seat (104).

5. The hematology bone marrow biopsy puncture sampling device according to claim 1, characterized in that: The top of the handheld seat (101) is provided with a socket groove adapted to the needle seat (104); the bottom of the needle seat (104) is provided with a second magnet (111) arranged in an annular structure through a first mounting groove; and the handheld seat (101) is provided with a first magnet (110) through a second mounting groove.

6. The hematology bone marrow biopsy puncture sampling device according to claim 5, characterized in that: The first magnet (110) and the second magnet (111) have opposite magnetic poles.

7. The hematology bone marrow biopsy puncture sampling device according to claim 1, characterized in that: The locking mechanism (2) comprises a symmetrically arranged locking plate (201) provided on the hand-held seat (101); the locking plate (201) is rotatably connected to the hand-held seat (101) via a rotating shaft, and a symmetrically arranged return torsion spring (202) is sleeved on the rotating shaft; a first slot (203) adapted to the locking plate (201) is provided on the surface of the needle seat (104); and a second slot (204) adapted to the locking plate (201) is provided on the needle seat (104) at a 45° angle to the first slot (203).

8. The hematology bone marrow biopsy puncture sampling device according to claim 7, characterized in that: The hand-held seat (101) is provided with a movable opening adapted to the lock plate (201), and the lock plate (201) is movable in the movable opening, and the two ends of the reset torsion spring (202) are fixedly connected to the lock plate (201) and the hand-held seat (101), respectively.

9. The hematology bone marrow biopsy puncture sampling device according to claim 7, characterized in that: The needle seat (104) is provided with a marking strip at the top of the second card slot (204) for distinguishing the first card slot (203) from the second card slot (204).

10. The hematology bone marrow biopsy puncture sampling device according to claim 7, characterized in that: When the locking plate (201) is stuck in the first slot (203), the rectangular slot (108) of the needle body (106) and the rectangular opening (107) opened by the trocar (102) are sealed and misaligned; when the locking plate (201) is stuck in the second slot (204), the rectangular slot (108) of the needle body (106) and the rectangular opening (107) opened by the trocar (102) correspond to each other.

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