Biopsy needle and syringe and biopsy sampling assembly thereof
By incorporating and locking components between the biopsy needle and syringe, the problem of needle detachment from syringe is solved, achieving a stable sampling locking structure and reducing medical risks and operational difficulties.
Patent Information
- Application Number
- CN202422898534.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-11-27
AI Technical Summary
During biopsy sampling, the high viscosity of the mixture of cells to be tested, blood, blood clots, or viscous fluid in the needle, and/or poor control of the advance speed of the syringe plunger, can easily cause the needle to detach from the syringe, resulting in specimen loss and medical and health risks.
A biopsy needle, its syringe, and a biopsy sampling assembly were designed. By setting an embedding component and a clearance component between the needle handle and the needle handle cap, a stable sleeve structure is formed. Furthermore, by setting an embedding component and a locking component between the needle handle and the syringe plunger, a sampling locking structure is formed, which enhances the locking degree between the needle tube and the syringe.
This ensures that the needle does not easily detach from the syringe during the cell ejection step, reducing medical risks and specimen loss, simplifying the operation, and improving operational safety.
Smart Images
Figure CN223682549U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of medical examination, in particular, the present application relates to a biopsy needle, a syringe thereof and a biopsy sampling assembly. BACKGROUND
[0002] In the current pathological diagnosis, such as tumor medical diagnosis, biopsy needs to be performed on patients to obtain part of the cells of the suspected lesions of the patients for pathological research. The biopsy is usually performed on various organs such as breast, thyroid, prostate and pancreas to sample living cells, among which the biopsy needle and the syringe are commonly used sampling tools.
[0003] The whole cell sampling process is as follows: (1) according to the medical image (such as B-ultrasound), the biopsy needle is inserted into the suspected lesion area of the patient, and the needle tube is used to repeatedly cut the tissue in the area, then the needle core part is lifted or completely pulled out of the needle tube, based on the principle of siphon, part of the cells are sucked into the needle tube, until enough cells are sucked, the biopsy needle is pulled out, and the cell sucking step is completed; (2) the needle handle of the needle tube is sleeved on the needle plug at the end of the disposable syringe, the piston shaft of the syringe is pushed, so that the piston moves forward, the cells in the needle tube are pushed out of the test vessel (such as a glass slide), so as to complete the cell pushing step.
[0004] At present, in the operation of pushing the cells in the needle tube and moving them to the test vessel, the connection mode of the needle handle and the needle plug of the syringe is the same as that of the general needle and syringe. That is, only the needle handle is sleeved on the needle plug and tightened. At this time, the needle tube is full of a mixture of cells to be tested, blood, blood clots or viscous cystic fluid. Compared with the needle agent generally injected by the syringe, the viscosity of the mixture is relatively high, which is not easy to be pushed out, resulting in a relatively large internal pressure of the needle tube during the cell pushing step. Therefore, the pushing speed of the piston of the syringe needs to be controlled during the cell pushing step, otherwise, the needle tube and the syringe will be separated due to the inability to release the pressure in the needle tube and the needle handle, and at the same time, the mixture of cells to be tested, blood, blood clots or viscous cystic fluid will be sprayed out from the separation between the needle tube and the needle handle. If the above situation occurs, the cell sample and the pathogen carried by the cell sample will cause a serious medical risk to the sampling site and the medical staff, and also cause the loss of the patient's cell sample. SUMMARY
[0005] In order to solve the technical problem of the medical and health risk caused by the disconnection of the needle tube and the syringe and the loss of the sample due to the high viscosity of the mixture of cells to be tested, blood, blood clots or viscous cystic fluid in the needle tube and / or the poor control of the pushing speed of the piston of the syringe in the current sampling process, the present application provides a biopsy needle, a syringe thereof and a biopsy sampling assembly.
[0006] In one aspect, the biopsy needle provided by the embodiments of the present application is connected with a syringe in the cell pushing step, and at least comprises a needle core, a needle handle cap, a needle tube and a needle handle, the needle core is fixedly connected with the needle handle cap, the needle tube is fixedly connected with the needle handle, the needle core can be sleeved in the needle tube, and the needle handle cap is detachably arranged on the needle handle;
[0007] An embedding member is arranged on the inner wall of the needle handle, and an avoiding member is arranged on the outer wall part of the needle handle connected with the needle handle, the avoiding member is correspondingly sleeved with the embedding member;
[0008] The embedding member is correspondingly arranged with a locking member of the outer wall of the needle plug of the syringe, and the two form a sampling locking structure between the biopsy needle and the syringe.
[0009] In an optional embodiment, the embedding member comprises a protrusion, and the avoiding member comprises a clearance slot, the extension range of the clearance slot corresponds to the connected part in the state that the needle handle and the needle handle cap are completely sleeved;
[0010] The number of the protrusions is at least two, and the protrusions are uniformly distributed on the inner wall of the needle handle;
[0011] The number of the clearance slots and the interval between two adjacent clearance slots correspond to the protrusions.
[0012] In an optional embodiment, the at least two protrusions are located at the same horizontal position of the needle handle.
[0013] In an optional embodiment, the cross-sectional shape of the protrusion is circular, and the width of the clearance slot corresponds to the diameter size of the circular protrusion.
[0014] In an optional embodiment, the extension direction of the clearance slot is parallel to the extension direction of the needle core.
[0015] In one aspect, the syringe provided by the embodiments of the present application is used in the cell pushing step in combination with the biopsy needle provided by any one of the above embodiments, and the syringe comprises the locking member;
[0016] The locking member is arranged on the outer wall of the needle plug of the syringe, the locking member and the embedding member are sleeved with each other, so that the needle tube and the needle plug are locked and communicated with each other, forming a sampling locking structure.
[0017] In an optional embodiment, the locking member comprises: a plurality of sets of sliding slots and locking slots, the sliding slots are parallel to the needle tube, the locking slots are perpendicular to the sliding slots and communicate with each other, and the locking slots are located at the end of the same set of sliding slots close to the needle barrel of the syringe; wherein the end close to the needle barrel of the syringe is the limit position where the needle handle and the needle plug can be converted to the locked state.
[0018] Each set of sliding slots and locking slots corresponds to one protrusion.
[0019] In an optional embodiment, the protrusion has a circular shape in the largest cross section parallel to the sliding slot, the diameter of the largest cross section of the protrusion corresponds to the width of the sliding slot, the width of the outlet of the locking slot is smaller than the diameter of the largest cross section of the protrusion, and the maximum width of the inside of the locking slot is greater than or equal to the diameter of the protrusion.
[0020] In an optional embodiment, the depth of the locking slot is equal to the height of the protrusion.
[0021] In one aspect, the embodiments of the present application also provide a biopsy sampling assembly, which comprises: the biopsy needle provided by any of the above embodiments, and the syringe provided by any of the above embodiments, wherein the biopsy needle and the syringe are connected and used in pairs in the cell pushing step.
[0022] The biopsy needle, the syringe and the biopsy sampling assembly provided by the present application have the following technical effects:
[0023] Based on the biopsy needle provided in the embodiments of the present application, the embedding member and the avoiding member arranged at the corresponding connection positions of the needle handle and the needle handle cap respectively make the needle handle cap and the needle handle nested with each other before the needle core is extracted in the suction step, so that the entire biopsy needle can form a stable sleeving structure, thereby ensuring that the needle core and the needle tube are not easily contaminated and always in a sterile state before use.
[0024] In addition, due to the corresponding arrangement of the embedding member of the needle handle and the locking member on the needle plug of the syringe, the sampling locking structure formed by the embedding member and the locking member is included in the sampling process, which enhances the locking degree between the needle tube and the syringe, thereby ensuring that the needle tube can be firmly locked on the syringe, and the biopsy needle will not be separated from the syringe, even if the pressure in the needle barrel and the needle tube cannot be released in a short time due to the over-speed pushing of the piston of the syringe, and / or the high viscosity of the mixture of cells, blood, blood clots or viscous cystic fluid in the needle tube.
[0025] Furthermore, the biopsy sampling assembly formed by the paired and locked connection of the biopsy needle and syringe in the cell ejection step provided in the above embodiments can greatly reduce the medical risks caused by easy contact with cell specimens and pathogens carried by cell specimens at the sampling site and by medical personnel operating the cell ejection step, and avoid the loss of cell specimens as a result. In addition, based on the mutual locking connection between the embedded component and the locking component, it helps to reduce the requirements for medical personnel operating the cell ejection step to control the piston's advance speed, thereby reducing the difficulty of cell ejection operation while ensuring operational safety.
[0026] Additional aspects and advantages of this application will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice. Attached Figure Description
[0027] The above and / or additional aspects and advantages will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:
[0028] Figure 1 A schematic cross-sectional view of the needle handle cap and handle of a biopsy needle provided in an embodiment of this application in the sleeved state;
[0029] Figure 2 A schematic cross-sectional view of the needle handle cap and needle handle in a separated state, provided for an embodiment of this application;
[0030] Figure 3 for Figure 1 Enlarged view of region I in the middle;
[0031] Figure 4 for Figure 2 Enlarged view of region II;
[0032] Figure 5 A schematic diagram of the syringe provided for one embodiment of this application;
[0033] Figure 6 for Figure 5 Enlarged view of region III;
[0034] Figure 7 A schematic cross-sectional view of a syringe provided in one embodiment of this application;
[0035] Figure 8 for Figure 7 Enlarged view of region IV;
[0036] Figure 9 A schematic diagram of the biopsy needle and syringe in a separated state in a biopsy sampling assembly provided in an embodiment of this application;
[0037] Figure 10 For Figure 9 Enlarged view of region V in FIG. 8;
[0038] Figure 11 Cross-sectional structure schematic diagram of the biopsy needle and the syringe in the biopsy sampling assembly provided by an embodiment of the present application in the state of being used together;
[0039] Figure 12 For Figure 11 Enlarged view of region VI in FIG. 8. DETAILED DESCRIPTION
[0040] The present application will be further described below in conjunction with the accompanying drawings and exemplary embodiments, wherein the same reference numerals refer to the same components throughout the drawings. In addition, if detailed description of known technologies is unnecessary for showing the features of the present application, it will be omitted.
[0041] In view of the technical problem that, in the sampling process, the needle tube and the syringe are easily separated and the specimen is lost due to the high viscosity of the mixture of cells, blood, blood clots or viscous cystic fluid to be detected in the needle tube and / or the poor control of the advancing speed of the piston of the syringe, which brings about the medical health risk, the present application provides a biopsy needle, a syringe and a biopsy sampling assembly.
[0042] Reference Figures 1-12 , Figure 1 Cross-sectional structure schematic diagram of the needle handle cap and the needle handle of the biopsy needle provided by an embodiment of the present application in the state of being sleeved, Figure 2 Cross-sectional structure schematic diagram of the needle handle cap and the needle handle of the biopsy needle provided by an embodiment of the present application in the state of being separated, Figure 3 For Figure 1 Enlarged view of region I in FIG. 8, Figure 4 For Figure 2 Enlarged view of region II in FIG. 8, Figure 5 Structure schematic diagram of the syringe provided by an embodiment of the present application, Figure 6 For Figure 5 Enlarged view of region III in FIG. 8, Figure 7 Cross-sectional structure schematic diagram of the syringe provided by an embodiment of the present application, Figure 8 For Figure 7 Enlarged view of region IV in FIG. 8, Figure 9 Structure schematic diagram of the biopsy needle and the syringe in the biopsy sampling assembly provided by an embodiment of the present application in the state of being separated, Figure 10 For Figure 9 Enlarged view of region V in FIG. 8, Figure 11 Cross-sectional structure schematic diagram of the biopsy needle and the syringe in the biopsy sampling assembly provided by an embodiment of the present application in the state of being used together;Figure 12 For Figure 11 Enlarged view of the VI region.
[0043] The biopsy needle 100 provided by the present application at least comprises a needle core 110, a needle handle cap 120, a needle tube 130 and a needle handle 140, wherein the needle core 110 is fixedly connected with the needle handle cap 120, and the needle tube 130 is fixedly connected with the needle handle 140. In the state ready for use, the needle core 110 is detachably sleeved in the needle tube 130, and the needle handle cap 120 is detachably arranged on the needle handle 140.
[0044] In the cell pushing step, the needle core 110 and the needle handle cap 120 are separated from the needle tube 130 and the needle handle 140, and the needle tube 130 is connected with and communicated with the syringe 200 through the needle handle 140. In actual operation, a 5ml disposable sterile syringe can be used in cooperation with the biopsy needle with a specification of 22G, 23G or 25G to complete the operation of the cell pushing step.
[0045] The biopsy needle 100 and the syringe 200 are used in cooperation to perform sampling, which at least includes two operation processes:
[0046] (1) According to the image data (such as B-ultrasound), the biopsy needle 100 is inserted into the suspected lesion area of the patient, and the needle tube 130 is used to repeatedly cut the tissue in the area, then the needle core 110 is lifted or pulled off the needle tube 130, and part of the cells are sucked into the needle tube 130 based on the principle of siphon, until enough cells are sucked, the needle tube 130 is pulled out, and the cell sucking step is completed;
[0047] (2) The needle handle 140 of the needle tube 130 is sleeved on the needle plug 210 at the end of the disposable syringe 200, the piston shaft 231 of the syringe 200 is pushed, so that the piston 230 moves forward, the cells in the needle tube 130 are pushed out and moved to the test vessel (such as a glass slide), and the cell pushing step is completed.
[0048] In the embodiment, the biopsy needle 100 further comprises an embedding member 150. In the operation process of the cell pushing step, the needle handle 140 is connected with the needle plug 210 of the syringe 200, and the connection structure therebetween specifically comprises the embedding member 150 and a corresponding locking member 220. The embedding member 150 is arranged on the inner wall of the needle handle 140, and the locking member 220 is arranged on the outer wall of the needle plug 210. In the cell pushing step, the needle handle 140 and the needle plug 210 are sleeved with each other and in a screwed state, and the embedding member 150 and the locking member 220 are sleeved with each other, so as to realize the locking and communication of the needle cylinder 240 of the syringe 200 and the needle tube 130.
[0049] During the cell pushing step, the needle tube 130 can pass through the sampling locking structure formed by the embedding member 150 and the locking member 220, specifically, the needle tube 130 is locked on the needle plug 210 of the syringe 200, preventing the needle tube 130 from being separated from the syringe 200 and the mixture being sprayed out due to the high viscosity of the mixture during the process of the piston 230 pushing the mixture of cells, blood, blood clots or viscous cystic fluid in the needle tube 130 outwards.
[0050] The biopsy needle 100 further comprises an avoiding member 160 corresponding to the embedding member 150. Specifically, the number and size of the embedding member 150 and the avoiding member 160 are corresponding, and the two can be nested with each other to form the entire biopsy needle 100. The embedding member 150 is arranged on the inner wall of the needle handle 140, and the avoiding member 160 is arranged on the outer wall corresponding to the embedding member 150. During the cell suction step, the embedding member 150 is embedded into the avoiding member 160, and the needle handle cap 120 and the needle handle 140 are in a state ready for use, avoiding the mutual rotation between the needle handle cap 120 and the needle handle 140, and ensuring the sterile state of the needle core 110 and the needle tube 130 before use.
[0051] Based on the biopsy needle 100 provided in the embodiments of the present application, the needle handle cap 120 and the needle handle 140 are nested with each other before the extraction of the needle core 110 in the cell suction step, so that the entire biopsy needle 100 can form a stable sleeving structure, thereby ensuring that the needle core 110 and the needle tube 130 are not easily contaminated before use and are always in a sterile state. Moreover, due to the corresponding arrangement of the embedding member 150 of the needle handle 140 and the locking member 220 on the needle plug 210 of the syringe 200, the sampling locking structure formed by the embedding member 150 and the locking member 220 is included in the cell pushing step, which enhances the locking degree between the needle tube 130 and the syringe 200, avoids the situation that the needle tube 130 easily separates from the syringe 200 due to excessive internal pressure and causes the cell specimen to be ejected, greatly reduces the medical risk of the medical staff operating the cell pushing step due to easy access to the cell specimen and the pathogens carried by the cell specimen, and avoids the loss of the cell specimen. In addition, based on the mutual locking connection relationship between the embedding member 150 and the locking member 220, it is helpful to reduce the requirement of the medical staff operating the cell pushing step to control the pushing speed of the piston 230, thereby reducing the operation difficulty of the cell pushing under the condition of ensuring the operation safety.
[0052] In the present embodiment, the connection mode between the needle handle 140 and the needle handle cap 120 is that the embedding member 150 is sleeved by the avoiding member 160, and the avoiding member 160 also provides space and guidance for the up-down movement of the embedding member 150.
[0053] On the basis of the above-provided embodiments, the embedding member 150 comprises: a protrusion 151 extending from the inner wall of the needle handle 140 to the center of the needle handle 140; and correspondingly, the avoiding member 160 comprises: a displacement slot 161.
[0054] In the present embodiment, the embedding member 150 comprises at least two protrusions 151, which are uniformly distributed on the inner wall of the needle handle 140. The number of displacement slots 161 is the same as the number of protrusions 151, and the interval between adjacent two displacement slots 161 is equal to the interval between adjacent two protrusions 151, so that the protrusions 151 are sleeved in the respective corresponding displacement slots 161.
[0055] The extension range of the displacement slot 161 is the range in which the needle handle 140 and the needle handle cap 120 are connected with each other in the fully sleeved state of the biopsy needle 100, specifically including: the range in which the needle handle 140 and the needle handle cap 120 are connected with each other before the extraction of the needle core 110 in the cell suction step and the state before use.
[0056] The extension direction of the accommodation groove 161 is parallel to the extension direction of the needle core 110. In the partial lifting or complete lifting of the needle core 110 in the cell suction step, the protrusion 151 is lifted along the extension direction of the respective accommodation groove 161 by taking the handle 121 on the upper part of the needle handle cap 120, so that the puncture operation of the biopsy needle 100 is smooth.
[0057] Specifically, the cross-sectional enlarged view of the needle head of the biopsy needle in the ready-to-use state can be seen from Figure 3 The first sharp head part 110a and the second sharp head part 110b of the head part of the needle core 110 are parallel to the third sharp head part 130a and the fourth sharp head part 130b of the outlet of the needle tube 130. In the puncture operation, in order to more easily penetrate the biopsy needle 100 into the patient's body, the fourth sharp head part 130b of the needle tube 130 needs to be first penetrated into the patient's skin. For the needle core 110, in order to ensure that the entire biopsy needle 100 can also be smoothly penetrated into the patient's body, the second sharp head part 110b of the needle core 110 also needs to be first penetrated into the patient's skin. In this embodiment, due to the sleeving design of the accommodation groove 161 and the protrusion 151, it is ensured that the slope where the head part of the needle core 110 is located is parallel to the slope where the outlet of the needle tube 130 is located before the biopsy needle 100 is penetrated into the patient's body and during the puncture process. Therefore, in the puncture operation, the fourth sharp head part 130b of the needle tube 130 is first penetrated into the patient's body, and for the needle core 110, it can also be ensured that the second sharp head part 110b of the needle core 110 is first penetrated into the patient's body, thereby ensuring that the puncture operation of the biopsy needle 100 is smooth, and at the same time, the biopsy needle 100 can be punctured to the suspected lesion area in the shortest time, which helps to reduce the pain of the patient.
[0058] Further, the cross-sectional shape of the protrusion 151 provided in the above embodiment is circular, which reduces the friction between the protrusion 151 and the accommodation groove 161, thereby reducing the friction between the needle handle cap 120 and the needle handle 140 when they move relative to each other. Specifically, the shape of the accommodation groove 161 can be a corresponding circular groove or a square groove. The width of the accommodation groove 161 corresponds to the diameter of the protrusion 151, and further, the width of the accommodation groove 161 is greater than or equal to the diameter of the protrusion 151, so as to ensure that the protrusion 151 is placed in the accommodation groove 161 and can move smoothly, thereby ensuring that the cell suction step meets the medical and health standards and the stability of the lifting of the needle core 110.
[0059] In addition, for the same needle handle 140, all the protrusions 151 are arranged at the same horizontal position, so that the protrusions 151 in each direction are equal in force with the corresponding relief groove 161 in the cell suction step, so as to ensure that the needle core 110 is more smoothly operated.
[0060] In addition, the protrusions 151 arranged on the inner wall of the needle handle 140 provide a structural basis for the design of the sampling locking structure formed between the needle handle 140 and the needle plug 210 in the cell pushing step. Specifically, the structure that all the protrusions 151 arranged on the inner wall of the needle handle 140 are at the same horizontal position makes the force in each direction where the needle handle 140 contacts the needle plug 210 equal, ensuring the stability of the sampling locking structure, which helps to achieve the purpose of preventing the biopsy needle 100 and the syringe 200 from being separated in the cell pushing step.
[0061] In this application, in addition to the technical solution of the biopsy needle 100 provided by the above-mentioned embodiment, a syringe 200 used in cooperation with the biopsy needle 100 is also provided, which can be specifically referred to Figures 5-8 .
[0062] In the cell pushing step, the biopsy needle 100 and the syringe 200 are completely set, the needle handle 140 of the biopsy needle 100 is connected to the outer wall part of the needle plug 210 of the syringe 200, and the corresponding locking member 220 is arranged. At this time, the locking member 220 and the embedded member 150 are locked with each other to form a sampling locking structure. The sampling locking structure can ensure that during the cell pushing step, even if the pressure inside the needle barrel 130 and the needle cylinder 240 cannot be released due to the high viscosity of the mixture of cells, blood, blood clots or viscous cystic fluid caused by the over-speed pushing of the piston 230 of the syringe 200, the needle barrel 130 can be firmly locked on the syringe 200, and the biopsy needle 100 will not be separated from the syringe 200, so as to reduce the medical risk caused by the easy contact of the medical staff with the cell specimen and the pathogen carried by the cell specimen in the sampling site and the medical staff operating the cell pushing step, and avoid the loss of the cell specimen. In addition, based on the mutual locking connection relationship between the embedded member 150 and the locking member 220, it is helpful to reduce the operation requirement of the medical staff controlling the pushing speed of the piston 230 in the cell pushing step, so as to reduce the operation difficulty of the cell pushing under the condition of ensuring the operation safety.
[0063] Specifically, the locking member 220 comprises a plurality of sets of sliding slots 221 and locking slots 222, and the sliding slots 221 and the locking slots 222 in the same set are communicated. Each sliding slot 221 is parallel to the needle tube 130. Each sliding slot 221 is perpendicular to and communicated with a respective locking slot 222, and the locking slots 222 are located at the end of the same set of sliding slots 221 close to the needle barrel 240 of the syringe 200. Each set of sliding slots 221 and locking slots 222 forms a "7"-shaped groove on the needle plug 210, as shown in Figures 5-6 Each set of sliding slots 221 and locking slots 222 corresponds to a protrusion 151. Specifically, the number of sets of sliding slots 221 and locking slots 222 and the interval between two sets of sliding slots 221 and locking slots 222 on the needle plug 210 correspond to the number of protrusions 151 and the interval between two adjacent protrusions 151, as shown in Figures 7-8 .
[0064] In the embodiments provided in Figures 5-8 , the needle handle 140 with two symmetrically arranged protrusions 151 is exemplified. Among them, Figure 5 , and Figure 7 are structural diagrams of the same syringe 200 at different angles. The syringe 200 in Figure 5 and Figure 7 are 90 degrees apart. In Figure 5 , only one set of sliding slots 221 and locking slots 222 can be seen. In Figure 7 , one set of locking slots 222 and another set of sliding slots 221 can be seen, which are oppositely arranged on both sides of the needle plug 210.
[0065] The width of the sliding slot 221 and the locking slot 222 provided in the above embodiments corresponds to the cross-sectional diameter of the protrusion 151 in the corresponding direction. Specifically, the protrusion 151 has a circular cross-sectional shape parallel to the sliding slot 221, and the width of the sliding slot 221 is greater than or equal to the diameter of the protrusion 151, so that the needle handle 140 can be smoothly sleeved along the corresponding sliding slot 221 based on the protrusion 151 on the inner wall thereof to the end of the sliding slot 221 close to the needle barrel 240 of the syringe 200. The end close to the needle barrel 240 of the syringe 200 is the limit position of the sampling locking structure formed by the needle handle 140 and the needle plug 210 to be converted to the locked state, thereby ensuring the air tightness of the connection between the biopsy needle 100 and the syringe 200 during the cell pushing step, preventing the cells from being ejected from there.
[0066] Specifically, based on the correspondence between the protrusion 151 and each set of sliding slots 221 and locking slots 222, before the cell pushing step starts, the protrusion 151 is placed at the end of the sliding slot 221 close to the needle barrel 240 of the syringe 200, and then the needle handle 140 is pushed to the locking slot 222, so that all the protrusions 151 on the needle handle 140 are sunk into the corresponding locking slots 222.
[0067] More specifically, in an embodiment, the width of the lock slot outlet 2221 is less than the diameter of the protrusion 151, and the maximum width inside the lock slot 222 is greater than or equal to the diameter of the protrusion 151. Referring to Figures 5-8 , the edge of the lock slot outlet 2221 is tangent to the edge of the slide slot outlet 2211, and from the slide slot outlet 2211 to the lock slot outlet 2221 on the surface of the needle hub 210, a gradually narrowing outlet channel is formed. When the protrusion 151 is pushed into the corresponding lock slot 222 along with the needle handle 140, each protrusion 151 is limited by the lock slot outlet 2221 and is completely locked in the lock slot 222, making it difficult to escape from the corresponding lock slot 222, thereby ensuring that the connection between the needle handle 140 and the needle hub 210 is in a locked state at this time, and ensuring that the sampling locking structure between the biopsy needle 100 and the syringe 200 is stable and not easily separated.
[0068] Further, the depth of the lock slot 222 is equal to the height of the protrusion 151, so that the protrusion 151 can be completely wrapped in the corresponding lock slot 222, thereby improving the locking effect of the lock slot 222 on each protrusion 151 and further ensuring the stability of the sampling locking structure between the biopsy needle 100 and the syringe 200.
[0069] Based on the design idea provided by the above embodiment, taking a 5ml syringe as an example, the wall thickness of the corresponding needle hub 210 is 1mm, the depth of the lock slot 222 can be set to 0.5mm, and the height of the protrusion 151 can be set to 0.5mm. Since the slide slot 221 is only for the protrusion 151 to slide along the needle hub 210, but does not lock the protrusion 151, in this embodiment, the depth of the slide slot 221 is set to be equal to 0.5mm or between 0.5-0.7mm.
[0070] In this application, in addition to the technical solutions of the biopsy needle 100 and the syringe 200 provided by the above embodiments, a biopsy sampling assembly 1000 formed by the biopsy needle 100 and the syringe 200 provided by the above embodiments being paired and locked in the cell pushing step and being used together is also provided. For details, please refer to Figures 9-12 . For the structure of the biopsy needle 100 and the syringe 200, please refer to the description of the biopsy needle 100 and the syringe 200 provided by the above embodiments.
[0071] Based on the biopsy sampling assembly 1000, the medical risk of the sampling site and the medical staff operating the cell pushing step caused by easy contact with the cell specimen and the pathogen carried by the cell specimen can be greatly reduced, and the loss of the cell specimen caused by this can be avoided. In addition, based on the mutual locking connection relationship between the embedded member 150 and the locking member 220, the requirement of the medical staff operating the cell pushing step to control the pushing speed of the piston 230 is reduced, thereby reducing the operation difficulty of the cell pushing while ensuring the operation safety.
[0072] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the disclosed range in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the disclosed concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the present application (but not limited to) with similar functions.
Claims
1. A biopsy needle which is connected to a syringe in the step of cell pushing, characterized by, At least comprising: a needle core, a needle handle cap, a needle tube and a needle handle, the needle core is fixedly connected with the needle handle cap, the needle tube is fixedly connected with the needle handle, the needle core can be sleeved in the needle tube, and the needle handle cap is detachably arranged on the needle handle; an embedded member is arranged on the inner wall of the needle handle, and an avoiding member is arranged on the outer wall part of the needle handle cap connected with the needle handle, the avoiding member and the embedded member are correspondingly sleeved with each other; the embedded member is correspondingly arranged with a locking member on the outer wall of the needle plug of the syringe, and the two form a sampling locking structure between the biopsy needle and the syringe.
2. The biopsy needle according to claim 1, wherein the embedded member comprises a protrusion, the avoiding member comprises a clearance slot, and the extension range of the clearance slot corresponds to the connected part in the state that the needle handle and the needle handle cap are completely sleeved; the number of the protrusions is at least two, and the protrusions are uniformly distributed on the inner wall of the needle handle; the number of the clearance slots and the interval between two adjacent clearance slots correspond to the protrusions.
3. The biopsy needle according to claim 2, wherein the at least two protrusions are located at the same horizontal position of the needle handle.
4. The biopsy needle according to claim 2, wherein the cross-sectional shape of the protrusion is circular, and the width of the clearance slot corresponds to the diameter size of the circular protrusion.
5. The biopsy needle according to claim 2, wherein the extension direction of the clearance slot is parallel to the extension direction of the needle core.
6. A syringe characterized by, The biopsy needle according to any one of claims 1-5 is used in pairing in the cell pushing step, and comprises the locking member; the locking member is arranged on the outer wall of the needle plug of the syringe, the locking member and the embedded member are sleeved with each other, so that the needle tube and the needle plug are locked and communicated with each other, forming a sampling locking structure.
7. The syringe according to claim 6, wherein the locking member comprises a plurality of groups of sliding grooves and locking grooves, the sliding grooves are parallel to the needle tube, the locking grooves are perpendicular to the sliding grooves and communicated with each other, and the locking grooves are located at the end of the same group of sliding grooves close to the needle barrel of the syringe; wherein the end close to the needle barrel of the syringe is the limit position at which the needle handle and the needle plug can be turned to the locked state; each group of sliding grooves and locking grooves corresponds to one protrusion.
8. The syringe according to claim 7, wherein the protrusion is circular in shape in parallel to the maximum cross section of the sliding groove, the diameter size of the maximum cross section of the protrusion corresponds to the width of the sliding groove, the width of the outlet of the locking groove is smaller than the diameter size of the maximum cross section of the protrusion, and the maximum width of the inside of the locking groove is greater than or equal to the diameter size of the protrusion.
9. The syringe according to claim 7, wherein the depth of the locking groove is equal to the height of the protrusion.
10. A biopsy sampling assembly comprising: The biopsy needle according to any one of claims 1-5 and the syringe according to any one of claims 6-9 are used in pairing and locked fixed connection in the cell pushing step.