Biopsy needle with quantitative suction function
By designing a quantitative mechanism in the biopsy needle, the controllable and stable amount of negative pressure is achieved, and the problem of unstable negative pressure control of existing biopsy needles is solved, and the safety of biopsy and the convenience of operation is improved.
Patent Information
- Application Number
- CN202421511814.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-06-28
AI Technical Summary
Existing biopsy needles are unstable in the negative pressure control during operation, which may lead to tissue damage or insufficient tissue sampling, increasing patient pain.
A quantitative suction biopsy needle is designed, and a quantitative mechanism is used to adjust the total length of the fixing rod and the extension rod, combined with the engagement of the insert block and the slot to achieve controllable and stable negative pressure generation.
Through the design of the quantitative mechanism, the negative pressure generation of the biopsy needle is more controllable and stable, which improves the safety of the biopsy, reduces the patient's pain, and simplifies the operation process.
Smart Images
Figure CN222899174U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of biopsy needles, in particular to a biopsy needle for quantitative aspiration. Background Art
[0002] During the pathological biopsy operation, it is necessary to insert the biopsy needle into the tissue to be examined, generate negative pressure to suck the diseased tissue into the biopsy needle, and cut and remove it. Currently, various biopsy needles are widely used for their advantages of convenient puncture, small damage, and ability to enter deep into the tissue.
[0003] During actual operation, if the negative pressure generated by the biopsy needle is excessive, it may cause damage to the local tissue of the human body, resulting in bleeding in the tissue. If the negative pressure fails to meet the requirements, the amount of tissue taken will be too small, and the pathological result cannot be determined, requiring multiple samplings, increasing the pain of the patient. Therefore, we propose a biopsy needle for quantitative aspiration. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the shortcomings existing in the prior art, and to propose a biopsy needle for quantitative aspiration, so that the amount of negative pressure generated by the biopsy needle is more controllable and stable, which is beneficial to ensuring the safety of the biopsy and reducing the pain of the patient.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0006] A biopsy needle for quantitative aspiration, including a suction cylinder, one end of the suction cylinder is fixedly connected with a connecting pipe, and a piston is slidably connected inside the suction cylinder. One side of the piston is fixed with a rod body, and one end of the rod body is fixed with a pressure handle;
[0007] A quantitative mechanism is arranged at one end of the suction cylinder. The quantitative mechanism includes a first spring, a receiving cavity and a fixed rod. One end of the pressure handle is fixedly connected with a cross bar. A receiving groove is opened at one end of the fixed rod, and a screw rod is threadedly connected above one end of the fixed rod. An extension rod is slidably connected inside the receiving groove. One end of the extension rod is penetrated and connected with a guide rod. One end of the guide rod is fixed with a connecting piece, and a second spring is sleeved outside the guide rod. A plug is fixed below the connecting piece, and a slot matching the plug is opened on the surface of the cross bar.
[0008] Preferably, the cross bar is slidably connected with the receiving cavity.
[0009] Preferably, the guide rod is slidably connected with the extension rod, and both ends of the second spring are fixedly connected with the extension rod and the connecting piece respectively.
[0010] Preferably, one end of the connecting pipe is fixedly connected with a suction inner tube, an outer suction tube is sleeved outside the suction inner tube, an inner sampling groove is formed at one end of the suction inner tube, and an outer sampling groove is formed at one end of the outer suction tube.
[0011] Preferably, a positioning member is fixed at the other end of the suction inner tube, a positioning groove is formed at the other end of the outer suction tube, and the positioning groove includes an A end and a B end.
[0012] Preferably, the first spring is sleeved outside the rod body, and two ends of the first spring are respectively fixedly connected with the suction cylinder body and the pressing handle.
[0013] Preferably, finger sleeves are symmetrically fixed outside the suction cylinder body.
[0014] Preferably, a puncture part is arranged at one end of the outer suction tube, and the puncture part is of a closed structure.
[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0016] 1. A quantitative mechanism is provided. By adjusting the total length of the fixed rod and the extension rod and using the engagement of the insertion block and the insertion slot, the adjustment of the generated amount of negative pressure of the biopsy needle can be realized, making the generated amount of negative pressure more controllable and stable, which is beneficial to ensuring the safety of the biopsy and reducing the pain of the patient;
[0017] 2. A positioning member and a positioning groove are provided. The positioning groove includes an A end and a B end. After the suction inner tube is inserted into the outer suction tube, the positioning member abuts against the A end, and the inner sampling groove can be aligned with the outer sampling groove, which is more convenient for the user to operate. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic diagram of the overall structure of a biopsy needle with quantitative suction proposed by the utility model;
[0019] Figure 2 is a schematic cross-sectional structure diagram of a biopsy needle with quantitative suction proposed by the utility model;
[0020] Figure 3 is a biopsy needle with quantitative suction proposed by the utility model Figure 2 The enlarged schematic diagram of the structure at A in;
[0021] Figure 4 is a schematic diagram of the structure of the suction inner tube and the outer suction tube of a biopsy needle with quantitative suction proposed by the utility model from the first perspective;
[0022] Figure 5 is a schematic diagram of the structure of the suction inner tube and the outer suction tube of a biopsy needle with quantitative suction proposed by the utility model from the second perspective.
[0023] In the figure: 10, suction cylinder; 11, connecting pipe; 12, accommodating cavity; 20, piston; 30, rod body; 40, pressing handle; 50, first spring; 60, cross bar; 61, slot; 70, fixed rod; 71, accommodating groove; 80, extension rod; 90, screw; 100, guide rod; 110, connecting piece; 120, second spring; 130, insertion block; 140, inner suction tube; 141, inner sampling groove; 142, positioning member; 150, outer suction tube; 151, outer sampling groove; 152, puncture part; 153, positioning groove; 1531, A end; 1532, B end; 160, finger cot. Specific embodiments
[0024] 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.
[0025] Refer to Figures 1-5 , a biopsy needle for quantitative aspiration, comprising a suction cylinder 10, one end of the suction cylinder 10 is fixedly connected with a connecting pipe 11, and a piston 20 is slidably connected inside the suction cylinder 10. One side of the piston 20 is fixed with a rod body 30, one end of the rod body 30 is fixed with a pressing handle 40, and a quantitative mechanism is arranged at one end of the suction cylinder 10. The quantitative mechanism includes a first spring 50, an accommodating cavity 12 and a fixed rod 70. One end of the pressing handle 40 is fixedly connected with a cross bar 60. The cross bar 60 is slidably connected with the accommodating cavity 12. The first spring 50 is sleeved outside the rod body 30, and both ends of the first spring 50 are fixedly connected with the suction cylinder 10 and the pressing handle 40 respectively. One end of the fixed rod 70 is provided with an accommodating groove 71, and a screw 90 is threadedly connected above one end of the fixed rod 70. An extension rod 80 is slidably connected in the accommodating groove 71. One end of the extension rod 80 is penetrated and connected with a guide rod 100. The guide rod 100 is slidably connected with the extension rod 80, and one end of the guide rod 100 is fixed with a connecting piece 110. A second spring 120 is sleeved outside the guide rod 100. Both ends of the second spring 120 are fixedly connected with the extension rod 80 and the connecting piece 110 respectively. An insertion block 130 is fixed below the connecting piece 110, and a slot 61 matching the insertion block 130 is provided on the surface of the cross bar 60. By adjusting the total length of the fixed rod 70 and the extension rod 80 and using the engagement of the insertion block 130 and the slot 61, the adjustment of the generated amount of negative pressure of this biopsy needle can be realized, making the generated amount of negative pressure more controllable and stable.
[0026] One end of the connecting pipe 11 is fixedly connected with a suction inner tube 140. An outer suction tube 150 is sleeved outside the suction inner tube 140. One end of the suction inner tube 140 is provided with an inner sampling groove 141, and one end of the outer suction tube 150 is provided with an outer sampling groove 151. After negative pressure is generated in the suction cylinder 10 and the suction inner tube 140, the tissue can be sucked into the outer sampling groove 151 and the inner sampling groove 141. One hand keeps the outer suction tube 150 still, and the other hand rotates the suction cylinder 10 and the suction inner tube 140. Through the intersection of the outer sampling groove 151 and the inner sampling groove 141, the extracted tissue is retained in the suction inner tube 140. Then, the suction inner tube 140 is pulled out by using the suction cylinder 10 to complete a biopsy sampling.
[0027] A positioning member 142 is fixed at the other end of the suction inner tube 140. A puncture part 152 is arranged at one end of the outer suction tube 150. The puncture part 152 is of a closed structure. A positioning groove 153 is formed at the other end of the outer suction tube 150. The positioning groove 153 includes an A end 1531 and a B end 1532. After the suction inner tube 140 is inserted into the outer suction tube 150, the positioning member 142 abuts against the A end 1531, and the inner sampling groove 141 can be aligned with the outer sampling groove 151.
[0028] Finger sleeves 160 are symmetrically fixed outside the suction cylinder 10. The finger sleeves 160 are provided to enable the doctor to grip the suction cylinder 10 more stably.
[0029] In the present utility model, according to the actual needs of a biopsy operation, the amount of negative pressure generated by the biopsy needle is adjusted as follows: Rotate the screw 90 clockwise so that the screw 90 no longer presses against the extension rod 80, adjust the length of the extension rod 80 extending out of the receiving groove 71, and then rotate the screw 90 counterclockwise to re-fix the extension rod 80. Press the pressing handle 40, the first spring 50 is compressed, and under the push of the rod body 30, the piston 20 abuts against one end of the suction cylinder 10, and the suction outer tube 150 and the suction inner tube 140 are inserted into the patient's tissue together. During this period, the pressing handle 40 cannot be released until one end of the suction outer tube 150 reaches the designated position, and then release the pressing handle 40. Under the rebounding action of the first spring 50, the piston 20, the rod body 30, the pressing handle 40, and the cross bar 60 move together. During this period, negative pressure is generated in the suction cylinder 10 and the suction inner tube 140, and the tissue is sucked into the outer sampling groove 151 and the inner sampling groove 141. When the cross bar 60 moves, the insertion block 130 slides relatively along the cross bar 60. At this time, the second spring 120 is in a compressed state. Until the slot 61 moves to the position where the insertion block 130 is located, under the elastic force of the second spring 120, the insertion block 130 can be inserted into the slot 61, so that the negative pressure generated by the biopsy needle is fixed, achieving the effect of quantitative extraction. Finally, keep one hand holding the suction outer tube 150 still, and turn the suction cylinder 10 and the suction inner tube 140 with the other hand, that is, the positioning member 142 moves from the A end 1531 to the B end 1532. Through the intersection of the outer sampling groove 151 and the inner sampling groove 141, the extracted tissue is left in the suction inner tube 140. Then, pull out the suction inner tube 140 by using the suction cylinder 10 to complete a biopsy sampling. If another sampling is needed, first pull the insertion block 130 out of the slot 61, then press the pressing handle 40, and repeat the above steps. After the suction inner tube 140 is inserted into the suction outer tube 150, make the positioning member 142 abut against the A end 1531, and the inner sampling groove 141 can be aligned with the outer sampling groove 151. Then release the pressing handle 40 to complete another sampling.
[0030] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.
Claims
1. A quantitative aspiration biopsy needle, comprising a suction cylinder (10), characterized in that: One end of the suction cylinder (10) is fixedly connected to a connecting pipe (11), and a piston (20) is slidably connected inside the suction cylinder (10), a rod (30) is fixed to one side of the piston (20), and a pressure handle (40) is fixed to one end of the rod (30); A quantitative mechanism is provided at one end of the suction cylinder (10), and the quantitative mechanism comprises a first spring (50), a containing cavity (12) and a fixed rod (70); one end of the pressure handle (40) is fixedly connected to a cross rod (60); one end of the fixed rod (70) is provided with a containing groove (71); a screw rod (90) is threadedly connected to the upper part of one end of the fixed rod (70); an extension rod (80) is slidably connected in the containing groove (71); one end of the extension rod (80) is penetrated and connected to a guide rod (100); one end of the guide rod (100) is fixed with a connecting plate (110); a second spring (120) is sleeved on the outside of the guide rod (100); an insert block (130) is fixed below the connecting plate (110); and a slot (61) matching the insert block (130) is provided on the surface of the cross rod (60).
2. A quantitative aspiration biopsy needle according to claim 1, characterized in that: The cross bar (60) is slidably connected to the accommodating cavity (12).
3. A biopsy needle for quantitative aspiration according to claim 1, characterized in that: The guide rod (100) is slidably connected to the extension rod (80), and two ends of the second spring (120) are fixedly connected to the extension rod (80) and the connecting piece (110) respectively.
4. A biopsy needle for quantitative aspiration according to claim 1, characterized in that: One end of the connecting tube (11) is fixedly connected to an inner suction tube (140), an outer suction tube (150) is sleeved on the outside of the inner suction tube (140), an inner sampling groove (141) is provided at one end of the inner suction tube (140), and an outer sampling groove (151) is provided at one end of the outer suction tube (150).
5. A quantitative aspiration biopsy needle according to claim 4, characterized in that: A positioning piece (142) is fixed to the other end of the inner suction tube (140), and a positioning groove (153) is formed at the other end of the outer suction tube (150), wherein the positioning groove (153) comprises an A end (1531) and a B end (1532).
6. A quantitative aspiration biopsy needle according to claim 1, characterized in that: The first spring (50) is sleeved on the outside of the rod body (30), and two ends of the first spring (50) are respectively fixedly connected to the suction cylinder (10) and the pressing handle (40).
7. A quantitative aspiration biopsy needle according to claim 1, characterized in that: Finger sleeves (160) are symmetrically fixed to the outside of the suction cylinder (10).
8. A quantitative aspiration biopsy needle according to claim 4, characterized in that: One end of the outer suction tube (150) is provided with a puncture portion (152), and the puncture portion (152) is a closed structure.