Bone marrow biopsy needle with dragging handle

Abstract

The utility model discloses a bone marrow biopsy needle with a dragging handle, and relates to the technical field of medical instruments. The puncture needle comprises a needle handle and a puncture tail column, a biopsy needle core is arranged at one end of the needle handle, a puncture needle is connected to the end face, away from the needle handle, of the puncture tail column, and a supporting handle is arranged on the periphery of the puncture needle in a sleeved mode. The peripheral side of the biopsy needle core is sleeved with a middle connecting column and a movable connecting column, a transmission gear ring and four driven gear rings are arranged in the middle connecting column in a rotating fit mode, and the driven gear rings are meshed with the side portion of the inner wall of the transmission gear ring. By rotating the rotating piece, the transmission gear ring drives the driven gear ring to rotate, so that the screw rod is driven to slide in the middle connecting column, the distance between the middle connecting column and the movable connecting column is conveniently adjusted according to the condition of a patient, and the overall length adjusting precision of the middle connecting column and the movable connecting column is improved; the requirement for preparing a plurality of middle connecting columns with different lengths is reduced, and the use cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, specifically, it relates to a bone marrow biopsy needle with a drag handle. Background Technology

[0002] Bone marrow aspiration is a commonly used diagnostic technique for collecting bone marrow fluid. Clinically, bone marrow aspiration fluid is often used for blood cell morphology examination, as well as for hematopoietic stem cell culture, cytogenetic analysis, and pathogenic biological examination, to assist in clinical diagnosis, observation of treatment efficacy, and prognosis assessment.

[0003] Chinese Patent No. CN213465117U discloses a bone marrow biopsy needle with a drag handle, comprising: the bone marrow biopsy needle further comprising an intermediate column, the intermediate column comprising an intermediate connector and an intermediate interface, the intermediate connector having the same structure as the handle protruding connector, and the intermediate interface having the same structure as the end concave interface.

[0004] The bone marrow biopsy needle with a drag handle disclosed in the application requires the preparation of various intermediate columns of different lengths due to the different conditions of each patient. The appropriate intermediate column is selected according to the patient's condition. However, the size interval between the intermediate columns is fixed. Only intermediate columns with close values ​​can be used, resulting in low accuracy. If the size interval between the intermediate columns is reduced, more intermediate columns are required within the same range, which will increase the cost of use. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a bone marrow biopsy needle with a drag handle, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A bone marrow biopsy needle with a handle includes: a handle and a puncture tail column. A biopsy needle core is provided at one end of the handle, and a puncture needle is connected to the end face of the puncture tail column away from the handle. Both the puncture tail column and the puncture needle are located around the biopsy needle core, and a handle is sleeved around the puncture needle.

[0008] The biopsy needle core is fitted with a central connecting post and a movable connecting post on its periphery. Both the central connecting post and the movable connecting post are located between the needle handle and the puncture tail post. The movable connecting post is located on the end face of the central connecting post near the needle handle. A drive gear ring and four driven gear rings are rotatably fitted inside the central connecting post. The drive gear ring is fitted around the four driven gear rings, which are evenly distributed around the periphery of the biopsy needle core. The driven gear rings mesh with the inner wall side of the drive gear ring. A rotating component is rotatably fitted on the side of the central connecting post, and the rotating component meshes with the outer wall side of the drive gear ring. A screw corresponding to the driven gear ring is installed on the end face of the movable connecting post near the central connecting post. The screw is slidably fitted inside the central connecting post, and the driven gear ring is threaded around the screw. The movable connecting post is slidably fitted around the periphery of the biopsy needle core.

[0009] Optionally, the intermediate column is provided with an annular groove 1 and four annular grooves 2. The annular grooves 2 are connected to the annular grooves 1. The drive gear ring rotates and engages in the annular groove 1, and the driven gear ring rotates and engages in the corresponding annular groove 2.

[0010] Optionally, the middle connecting column has four sliding grooves on one end face, and the annular groove is located on the periphery of the corresponding sliding groove, and the screw slides in the corresponding sliding groove.

[0011] Optionally, the rotating component includes a throttle, one end of which extends into the interior of the intermediate column. A bevel gear is mounted on the end face of the throttle, and the bevel gear is rotatably engaged within the intermediate column, meshing with the outer wall side of the transmission gear ring.

[0012] Optionally, the intermediate column is provided with a movable groove, and a bevel gear is rotatably engaged in the movable groove, which is connected to an annular groove.

[0013] Optionally, the movable connector has an annular groove 1 on one end face, and the puncture tail post has an annular groove 2 on one end face. The annular groove 1 and the annular groove 2 have the same diameter. The inner diameter of the annular groove 1 and the annular groove 2 is larger than the outer diameter of the biopsy needle core. The needle handle has an annular post 1 that is adapted to the annular groove 1 and the annular groove 2 on one end face. The annular post 1 is located on the periphery of the biopsy needle core.

[0014] Optionally, the annular column is provided with an external thread 1 on one circumference, the annular groove is provided with an internal thread 1 that matches the external thread 1 on one circumference, and the annular groove is provided with an internal thread 2 that matches the external thread 1 on the second circumference.

[0015] Optionally, the middle connecting post has a second annular post that is adapted to the second annular groove on the end face away from the movable connecting post. The second annular post is located on the periphery of the biopsy needle core, and the periphery of the second annular post has an external thread, which is the same as the first external thread.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0017] By rotating the rotating component, the transmission gear ring drives the driven gear ring to rotate, thereby driving the screw to slide within the intermediate connecting column. This facilitates the adjustment of the distance between the intermediate connecting column and the movable connecting column according to the patient's condition, improves the accuracy of the overall length adjustment of the intermediate connecting column and the movable connecting column, reduces the need to prepare multiple intermediate connecting columns of different lengths, and lowers the cost of use. Through the cooperation of the transmission gear ring and four driven gear rings, the rotating component can drive the four screws to slide synchronously, improving the stability of the movable connecting column during sliding.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0020] In the picture:

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the intermediate column;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the rotating component.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Needle handle, 2. Biopsy needle core, 3. Puncture tail post, 4. Puncture needle, 5. Intermediate connecting post, 6. Movable connecting post, 7. Drive gear ring, 8. Driven gear ring, 9. Screw, 10. Bevel gear 1, 11. Annular groove 1, 12. Annular groove 2, 13. Movable groove, 14. Slide groove, 15. Support handle, 16. External thread 1, 17. Internal thread 1, 18. External thread 2, 19. Internal thread 2, 20.

[0026] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Bone marrow is the body's hematopoietic tissue, located within the medullary cavity. Bone marrow aspiration is the procedure of using a specialized needle to insert into the medullary cavity from a selected bone site and extract a small amount of bone marrow fluid for laboratory testing. The principle behind this procedure is based on the fact that bone marrow contains abundant hematopoietic stem cells and various blood cell precursors. Changes in the morphology, quantity, and function of these cells can reflect the body's hematopoietic function and the presence of disease.

[0030] Bone marrow aspiration is a common and important medical examination procedure that plays a crucial role in the diagnosis, treatment monitoring, and prognostic assessment of hematological diseases and various systemic diseases. It provides doctors with direct sample data to gain a deeper understanding of the physiological and pathological state of human bone marrow, which is of great significance for precision medicine.

[0031] Bone marrow aspiration, a classic medical examination method, has provided crucial information for the diagnosis and treatment of countless patients over the past few decades. With the continuous development of medical technology, bone marrow aspiration techniques are constantly being improved and refined. For example, the development of new aspiration instruments and intelligent assistance systems for the procedure further enhance the accuracy and safety of the procedure. Simultaneously, combining bone marrow aspiration with other advanced detection technologies (such as gene sequencing and flow cytometry) can provide more comprehensive and accurate information for disease diagnosis and treatment, leading to better treatment outcomes and quality of life for patients. In the future, bone marrow aspiration is expected to play a vital role in more fields, making a greater contribution to medical development and human health.

[0032] I. Structure and Principle of Bone Marrow Biopsy Needles

[0033] (I) Basic Structure

[0034] Bone marrow biopsy needles typically consist of a core, an outer sheath, and a handle. The core has a sharp cutting edge at its tip for penetrating bone and cutting bone marrow tissue; the outer sheath protects the core, holds the obtained bone marrow tissue, and controls the puncture depth. The handle is ergonomically designed for easy gripping and manipulation by the physician, ensuring stability and accuracy during the puncture process. Different types of bone marrow biopsy needles may vary slightly in their specific structure, but they are all generally designed around these core components.

[0035] (II) Working Principle

[0036] Its working principle is based on mechanical cutting and tissue acquisition. After the doctor inserts the bone marrow biopsy needle into the bone marrow cavity, the cutting edge of the needle core cuts the bone marrow tissue through rotation and advancement. The cut bone marrow tissue is then collected in the outer cannula. This method of directly obtaining bone marrow tissue can completely preserve the tissue structure of the bone marrow, providing more comprehensive and accurate information for pathological diagnosis. Compared with simply aspirating bone marrow fluid through bone marrow puncture, the sample obtained by the biopsy needle is more conducive to observing the distribution and arrangement of bone marrow cells and the bone marrow microenvironment.

[0037] (III) Maintenance and Care of Bone Marrow Biopsy Needles

[0038] 1. Cleaning: After use, the bone marrow biopsy needle should be cleaned promptly to remove contaminants such as blood and tissue residue from the surface. Generally, rinse with clean water first, then soak and scrub with a special instrument cleaning agent to ensure that the inside and outside of the needle core, outer cannula, and other components are thoroughly cleaned.

[0039] 2. Disinfection and Sterilization: After cleaning, the biopsy needle must undergo strict disinfection and sterilization to prevent cross-infection. Common disinfection methods include high-temperature autoclaving and ethylene oxide sterilization. Before sterilization, ensure the biopsy needle is completely dry to avoid affecting the sterilization effect due to residual moisture.

[0040] 3. Inspection and Maintenance: Regularly inspect the bone marrow biopsy needle to check for sharpness of the core, deformation or damage to the outer sheath, and sturdiness of the handle. If any problems are found, repair or replace the affected parts promptly. Store the biopsy needle properly to avoid impact and damage.

[0041] Bone marrow biopsy plays an irreplaceable role in clinical diagnosis, providing crucial histological evidence for the diagnosis of hematological diseases (such as leukemia, lymphoma, and myelodysplastic syndrome), certain infectious diseases (such as malaria and leishmaniasis when pathogens invade the bone marrow), and bone metastases from malignant tumors. Through pathological examination of bone marrow tissue, doctors can determine the type, stage, and progression of the disease, thereby developing precise treatment plans.

[0042] With the continuous development of medical technology, bone marrow biopsy needles are also constantly being improved and innovated. In the future, more intelligent and precise bone marrow biopsy needles may emerge, making the operation simpler and safer, obtaining higher-quality tissue samples, and causing less trauma to patients. At the same time, combined with advanced imaging technologies (such as ultrasound guidance and CT guidance), the accuracy of bone marrow biopsy needle puncture will be further improved, providing stronger support for clinical diagnosis and treatment, and making a greater contribution to human health.

[0043] Please see Figure 1-3As shown, this embodiment provides a bone marrow biopsy needle with a handle, including: a needle handle 1 and a puncture tail column 3. A biopsy needle core 2 is provided at one end of the needle handle 1, and one end of the biopsy needle core 2 is threaded into the needle handle 1. A puncture needle 4 is connected to the end face of the puncture tail column 3 away from the needle handle 1. Both the puncture tail column 3 and the puncture needle 4 are located on the periphery of the biopsy needle core 2. A handle 16 is sleeved on the periphery of the puncture needle 4.

[0044] The biopsy needle core 2 is fitted with a central connecting post 5 and a movable connecting post 6 on its periphery. Both the central connecting post 5 and the movable connecting post 6 are located between the needle handle 1 and the puncture tail post 3. The movable connecting post 6 is located on the end face of the central connecting post 5 near the needle handle 1. A transmission gear ring 7 and four driven gear rings 8 are rotatably fitted inside the central connecting post 5. The transmission gear ring 7 is fitted around the four driven gear rings 8. The four driven gear rings 8 are evenly distributed around the periphery of the biopsy needle core 2. The driven gear rings 8 mesh with the inner wall side of the transmission gear ring 7. A rotating part is rotatably fitted on the side of the central connecting post 5. The rotating part meshes with the outer wall side of the transmission gear ring 7. A screw 9 corresponding to the driven gear ring 8 is installed on the end face of the movable connecting post 6 near the central connecting post 5. The screw 9 is slidably fitted inside the central connecting post 5 and around the threaded side of the driven gear ring 8. The movable connecting post 6 is slidably fitted around the periphery of the biopsy needle core 2.

[0045] One application of this embodiment is as follows: In use, firstly, adjust the distance between the intermediate connecting post 5 and the movable connecting post 6 according to the patient's condition. During this process, first rotate the rotating component clockwise, causing the rotating component to drive the transmission gear ring 7 to rotate. Simultaneously, the transmission gear ring 7 drives the four driven gear rings 8 to rotate synchronously. The rotation of the driven gear rings 8 drives the screw 9 to slide. The sliding of the screw 9 pushes the movable connecting post 6 away from the intermediate connecting post 5. When the distance between the movable connecting post 6 and the intermediate connecting post 5 reaches the appropriate position, release the rotating component. Then, holding the needle handle 1, sequentially pass the biopsy needle core 2 through the movable connecting post 6, the intermediate connecting post 5, the puncture tail post 3, and the puncture needle 4 to perform the subsequent bone marrow retrieval operation. It should be noted that all electrical equipment involved in this application can be powered by a storage battery or an external power source.

[0046] By rotating the rotating component, the transmission gear ring 7 drives the driven gear ring 8 to rotate, thereby driving the screw 9 to slide within the intermediate connecting post 5. This facilitates the adjustment of the distance between the intermediate connecting post 5 and the movable connecting post 6 according to the patient's condition, improves the accuracy of the overall length adjustment of the intermediate connecting post 5 and the movable connecting post 6, reduces the need to prepare multiple intermediate connecting posts 5 of different lengths, and lowers the cost of use. Through the cooperation between the transmission gear ring 7 and the four driven gear rings 8, the rotating component can drive the four screws 9 to slide synchronously, improving the stability of the movable connecting post 6 during sliding.

[0047] like Figure 2As shown, the intermediate column 5 in this embodiment is provided with an annular groove 12 and four annular grooves 23. The annular grooves 213 are connected to the annular groove 12. The transmission gear ring 7 is rotatably engaged in the annular groove 12, and the driven gear ring 8 is rotatably engaged in the corresponding annular groove 213. The annular grooves 12 and 213 facilitate the provision of movement space for the transmission gear ring 7 and the driven gear ring 8, and facilitate the meshing of the driven gear ring 8 and the transmission gear ring 7, reducing the probability of disengagement between the driven gear ring 8 and the transmission gear ring 7.

[0048] like Figure 2 , 3 As shown, in this embodiment, one end face of the intermediate connecting post 5 is provided with four sliding grooves 15, and the second annular groove 13 is located on the periphery of the corresponding sliding groove 15. The second annular groove 13 is connected to the sliding groove 15, and the screw 9 is slidably engaged in the corresponding sliding groove 15. The sliding groove 15 facilitates the movement of the driven gear ring 8 to drive the screw 9 to slide in the intermediate connecting post 5, and provides storage space for the screw 9.

[0049] like Figure 3 As shown, the rotating component in this embodiment includes a throttle 10. One end of the throttle 10 extends into the interior of the intermediate column 5. A bevel gear 11 is mounted on one end face of the throttle 10. The bevel gear 11 is rotatably engaged in the intermediate column 5. The bevel gear 11 meshes with the outer wall side of the transmission gear ring 7. The transmission gear ring 7 includes an inner gear ring. A bevel gear 2 is provided on the periphery of the inner gear ring. The bevel gear 11 meshes with the bevel gear 2. By rotating the throttle 10, the bevel gear 11 is driven to rotate, thereby causing the bevel gear 11 to rotate and drive the bevel gear 2 and the inner gear ring to rotate, and causing the inner gear ring to rotate and drive the driven gear ring 8 to rotate.

[0050] like Figure 3 As shown, the intermediate connecting column 5 in this embodiment is provided with a movable groove 14, and the bevel gear 11 is rotatably engaged in the movable groove 14. The movable groove 14 is connected to the annular groove 12. The side of the intermediate connecting column 5 is provided with a rotating hole that is connected to the movable groove 14. One end of the handle 10 is rotatably engaged in the rotating hole. The movable groove 14 provides a space for the bevel gear 11 to move, reducing the probability of the bevel gear 11 disengaging from the transmission gear ring 7.

[0051] like Figure 1 , 3 As shown, in this embodiment, the movable connector 6 has an annular groove 1 on one end face, and the puncture tail column 3 has an annular groove 2 on one end face. The annular groove 1 and the annular groove 2 have the same diameter, and the inner diameter of the annular groove 1 and the annular groove 2 is larger than the outer diameter of the biopsy needle core 2. The needle handle 1 has an annular post 1 on one end face that is adapted to the annular groove 1 and the annular groove 2. The annular post 1 is located on the periphery of the biopsy needle core 2. By the annular post 1 cooperating with the annular groove 1 or the annular groove 2, it is convenient to connect the needle handle 1 with the movable connector 6 or the puncture tail column 3, thereby reducing the probability of misalignment between the needle handle 1 and the movable connector 6 or the puncture tail column 3.

[0052] like Figure 1 , 3 As shown, in this embodiment, the annular post is provided with an external thread 17 on one circumference, the annular groove is provided with an internal thread 18 that matches the external thread 17 on one circumference, and the annular groove is provided with an internal thread 20 that matches the external thread 17 on the other circumference. In use, the external thread 17 and the internal thread 18 cooperate to fix the needle handle 1 and the movable connector 6 together, thereby limiting the length of the biopsy needle core 2 through the puncture needle 4. The external thread 17 and the internal thread 18 cooperate to fix the needle handle 1 and the puncture tail post 3 after they are separated from the biopsy needle core 2 together, thereby facilitating the use of the puncture needle 4 to perform puncture operations on the patient.

[0053] like Figure 1 , 3 As shown, in this embodiment, the end face of the intermediate connecting post 5 away from the movable connecting post 6 is provided with an annular post 2 that is adapted to the annular groove 2. The annular post 2 is located on the periphery of the biopsy needle core 2. The periphery of the annular post 2 is provided with an external thread 2 19. The external thread 2 19 is the same as the external thread 1 17. In use, the needle handle 1 and the puncture tail post 3 are first connected together by threads. Then, the puncture needle 4 is inserted into the bone marrow. Then, the needle handle 1 and the puncture tail post 3 are separated. The needle handle 1 and the biopsy needle core 2 are first connected and fixed. Then, the needle handle 1 and the movable connecting post 6, the intermediate connecting post 5 and the puncture tail post 3 are connected together, so that the biopsy needle core 2 passes through the puncture needle 4 to remove the bone marrow. The external thread 2 19 and the internal thread 2 20 are matched to make it easy to fix the movable connecting post 6 and the puncture tail post 3 together, so that the entire biopsy needle is fixed, making it easy for the biopsy needle core 2 to pass through the puncture needle 4 to remove the bone marrow.

[0054] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A bone marrow biopsy needle with a drag handle, characterized in that, include: The needle handle (1) and the puncture tail column (3) are provided with a biopsy needle core (2) at one end of the needle handle (1) and a puncture needle (4) is connected to the end face of the puncture tail column (3) away from the needle handle (1). A support handle (16) is sleeved on the periphery of the puncture needle (4). The biopsy needle core (2) is fitted with a central connecting post (5) and a movable connecting post (6) on its periphery. The central connecting post (5) is rotatably fitted with a transmission gear ring (7) and four driven gear rings (8). The driven gear rings (8) mesh with the inner wall side of the transmission gear ring (7). The side of the central connecting post (5) is rotatably fitted with a rotating part, which meshes with the outer wall side of the transmission gear ring (7). The movable connecting post (6) is fitted with a screw (9) corresponding to the driven gear ring (8) on one end face near the central connecting post (5).

2. The bone marrow biopsy needle with a drag handle according to claim 1, characterized in that, The intermediate column (5) is provided with an annular groove 1 (12) and four annular grooves 2 (13). The transmission gear ring (7) is rotatably engaged in the annular groove 1 (12), and the driven gear ring (8) is rotatably engaged in the corresponding annular groove 2 (13).

3. A bone marrow biopsy needle with a drag handle according to claim 2, characterized in that, The middle column (5) has four sliding grooves (15) on one end face, and the screw (9) slides in the corresponding sliding groove (15).

4. A bone marrow biopsy needle with a drag handle according to claim 1, characterized in that, The rotating component includes a throttle (10), one end of which extends into the interior of the intermediate column (5), and a bevel gear (11) is mounted on one end face of the throttle (10), which meshes with the outer wall side of the transmission gear ring (7).

5. A bone marrow biopsy needle with a drag handle according to claim 4, characterized in that, The intermediate column (5) is provided with a movable groove (14), and the bevel gear (11) is rotatably engaged in the movable groove (14).

6. A bone marrow biopsy needle with a drag handle according to claim 1, characterized in that, The movable connector (6) has an annular groove 1 on one end face, the puncture tail column (3) has an annular groove 2 on one end face, and the needle handle (1) has an annular post 1 that is compatible with the annular groove 1 and the annular groove 2 on one end face. The annular post 1 is located on the periphery of the biopsy needle core (2).

7. A bone marrow biopsy needle with a drag handle according to claim 6, characterized in that, The annular column has an external thread (17) on one side, the annular groove has an internal thread (18) that matches the external thread (17) on one side, and the annular groove has an internal thread (20) that matches the external thread (17) on the other side.

8. A bone marrow biopsy needle with a drag handle according to claim 7, characterized in that, The middle connecting post (5) is provided with a ring post two that is adapted to the ring groove two at one end face away from the movable connecting post (6), and the ring post two is provided with an external thread two (19) on its circumference.

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