Tissue sampling device capable of preventing needle head from being blocked and being partially recycled

Abstract

The utility model provides a tissue sampling device capable of preventing a needle head from being blocked and being partially recycled, and relates to the technical field of medical auxiliary equipment. The sampling device comprises a sampling tube, a needle tube, a piston piece, a needle head, a cutting piece and a rotating ring; the near end of the sampling tube is connected with the near end of the needle tube; the far-end head of the piston piece is positioned in the sampling tube, the rod part penetrates through the first plugging part and is connected with the head part, and the near-end is in threaded connection with the needle tube; the needle head is connected with the piston piece; the multiple cutting pieces are arranged between the needle head and the rotating ring at intervals in the circumferential direction. According to the sampling device disclosed by the utility model, the needle head and the cutting piece firstly penetrate into a pathology, then the piston piece drives the needle head and the cutting piece to rotate to cut off the pathology, and the cut pathology can enter the sampling tube for sampling through suction of the piston piece, so that the problem that the needle head of the sampling device is blocked can be reduced, and the sampling efficiency is improved; meanwhile, the sampling device can be partially recycled, so that the use cost can be reduced, and energy conservation and environmental protection are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical auxiliary equipment technical field, specifically, relate to a kind of tissue sampling device that can be partially recycled and prevent needle head from being blocked. BACKGROUND

[0002] The needle tube sampling device is a tool for puncture sampling, mainly used for extracting tissue samples or liquid samples from the patient's body for pathological or cytological examination to help doctors make diagnosis or evaluate treatment plan.

[0003] However, since the needle tube sampling device is pre-punctured by the needle tube, and then sampled by using negative pressure, after the needle head pierces the pathology, the cell fragments or blood clots in the tissue sample block the needle head, resulting in poor negative pressure suction effect, affecting the sampling. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of tissue sampling device that can be partially recycled and prevent needle head from being blocked, to solve the problem that needle head is easily blocked and affects sampling.

[0005] To solve the above problems, the utility model first provides a kind of tissue sampling device that can be partially recycled and prevent needle head from being blocked, including sampling pipe, needle tube, piston piece, needle head, cutting piece and rotating ring;The distal end of the sampling pipe is open, and the proximal end of the sampling pipe is closed by the first plugging part and connected with the distal end of the needle tube;The piston piece includes head and stem, the head is arranged in the sampling pipe, and is sealed and slidingly cooperated with the inner circumferential surface of the sampling pipe, the stem is located in the needle tube, the distal end of the stem passes through the first plugging part and is connected with the head, and the proximal end of the stem is screw-connected with the needle tube;The distal end of the needle head is located outside the sampling pipe, and the proximal end of the needle head is connected with the piston piece;The rotating ring is connected to the proximal end of the sampling pipe in a rotatable manner around its own axis;A plurality of cutting pieces are arranged in a circumferential direction between the needle head and the rotating ring, one end of the cutting piece is connected with the proximal end of the needle head, the other end is connected with the rotating ring, and the cutting piece is configured to be deformed under external force;Wherein, rotating the piston piece can move the distal end of the needle head from outside the sampling pipe to inside the sampling pipe.

[0006] According to the sampling device, the needle head is used to pierce the pathology and perform suction, and the needle head and the cutting member are used to pierce the pathology first, then the needle head and the cutting member are driven to rotate by the piston member, and the pathology is cut off, and the cut-off pathology can be sucked into the sampling tube by the piston member to perform sampling.

[0007] In addition, the sampling device has the following additional technical features.

[0008] In some embodiments of the utility model, the outer surface of the plurality of cutting members forms a conical profile when the distal end of the needle head is located outside the sampling tube.

[0009] In some embodiments of the utility model, the needle head comprises a tip portion, a main body portion and a spiral conveying portion, the tip portion is located at the distal end of the main body portion, and the spiral conveying portion extends in a spiral shape on the outer peripheral surface of the main body portion along the axial direction of the main body portion.

[0010] In some embodiments of the utility model, the sampling tube is provided with a sampling outlet and a second blocking portion covering the sampling outlet, and the second blocking portion is detachably connected to the sampling tube.

[0011] In some embodiments of the utility model, from the distal end to the proximal end of the sampling device, the sampling tube comprises a first portion and a second portion connected in sequence, the radial dimension of the first portion is smaller than that of the second portion, the rotating ring is connected to the distal end of the first portion, the proximal end of the second portion is connected to the needle tube, and the head portion is located in the second portion.

[0012] In some embodiments of the utility model, the second portion and the needle tube are detachably connected.

[0013] In some embodiments of the utility model, the second portion and the needle tube are detachably connected.

[0014] In some embodiments of the utility model, the rod portion comprises a first rod body and a second rod body, the length of the first rod body is smaller than that of the second rod body, the distal end of the first rod body is fixedly connected to the head portion, the proximal end of the first rod body is detachably connected to the distal end of the second rod body, and the distal end of the second rod body is threadedly connected to the inner wall of the needle tube.

[0015] In some embodiments of the utility model, the first rod body and the second rod body are inserted.

[0016] In some embodiments of the present application, the proximal end of the rod portion extends out of the sampling tube and is provided with a rotating handle. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by the provided drawings without creative labor for those skilled in the art.

[0018] Figure 1 A structure schematic view of the tissue sampling device provided by the embodiment of the present application is shown in the figure.

[0019] Figure 2 A structure schematic view of the tissue sampling device provided by the embodiment of the present application is shown in the figure.

[0020] Figure 3 A structure schematic view of the tissue sampling device provided by the embodiment of the present application is shown in the figure.

[0021] Figure 4 A structure schematic view of the tissue sampling device provided by the embodiment of the present application is shown in the figure. Figure 3 An enlarged view of a part a of the figure.

[0022] Figure 5 A structure schematic view of the tissue sampling device provided by the embodiment of the present application is shown in the figure.

[0023] Figure 6 An enlarged view of a part b of the figure. Figure 5

[0024] Explanation of reference signs:

[0025] 100, sampling tube; 110, first part; 120, second part; 121, sampling outlet; 122, second blocking part; 123, first protrusion; 124, first blocking part; 200, needle tube; 210, first insertion slot; 300, piston piece; 310, head portion; 320, rod portion; 321, first rod body; 3211, second insertion slot; 322, second rod body; 3221, second protrusion; 323, rotating handle; 400, needle; 410, tip portion; 420, main body portion; 430, spiral conveying portion; 500, cutting piece; 600, rotating ring. DETAILED DESCRIPTION

[0026] ​In order to make the above object, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application will be described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0027] The pathological sampling device for tumors or gynecology usually includes cutting sampling, sampling needle sampling and scraping sampling, etc., and for the sampling needle, the principle is to use the needle to puncture the pathology and extract the tissue sample, and the needle is easy to be blocked when the pathology has high viscosity or the tissue fragments or cell fragments enter the inside of the sampling needle, thereby affecting the sampling.

[0028] Therefore, the present embodiment provides a tissue sampling device capable of preventing needle blockage and partially recycling, which uses a needle to puncture the pathology and cuts through a cutting member, combines the sampling needle and the cutting sampling, and expands the radial size of the sampling needle suction to solve the above technical problems.

[0029] The specific embodiments of the present application will be described below with reference to the drawings. Figures 1-6 The present embodiment provides a tissue sampling device capable of preventing needle blockage and partially recycling.

[0030] It should be noted that the "proximal end" in the present embodiment refers to the end of the sampling device close to the operator during sampling, and the "distal end" refers to the end of the sampling device away from the operator during sampling.

[0031] The specific embodiments of the present application will be described below with reference to the drawings. Figures 1-4 The present embodiment provides a tissue sampling device capable of preventing needle blockage and partially recycling, which includes a sampling tube 100, a needle tube 200, a piston member 300, a needle 400, a cutting member 500 and a rotating ring 600. The sampling tube 100 and the needle tube 200 can be plastic parts, the needle 400 is a metal part, the piston member 300 can be made of rubber, and the rotating ring 600 can be a metal or plastic part.

[0032] The distal end of the sampling tube 100 is open, the proximal end of the sampling tube 100 is connected to the distal end of the needle tube 200, and the connection mode of the sampling tube 100 and the needle tube 200 can be integral connection or integral molding, or can be detachable connection as described below.

[0033] The proximal end of the sampling tube 100 of the present embodiment is provided with a first plugging part 124 for plugging the proximal end thereof, so that the sampling tube 100 forms a sampling cavity with a distal end opening and a proximal end closed, and the cut pathological enters the sampling cavity for collection.

[0034] The piston member 300 of this embodiment includes a head portion 310 and a rod portion 320. The radial dimension of the head portion 310 is larger than that of the rod portion 320. The head portion 310 is disposed within the sampling tube 100 and is sealed and slidably engaged with the inner circumferential surface of the sampling tube 100. The head portion 310 can also rotate around its own axial direction within the sampling tube 100 under the drive of the rod portion 320.

[0035] The rod 320 of this embodiment is located inside the needle tube 200, the distal end of the rod 320 passes through the first blocking portion 124 and is connected to the head 310, and the proximal end of the rod 320 is threadedly connected to the internal thread provided on the inner wall of the needle tube 200, so that the rod 320 can move a certain amount along its own axial direction or length direction under the action of the thread when rotating.

[0036] In this embodiment, the distal end of the needle 400 is located outside the sampling tube 100 . The needle 400 is a solid structure, and the proximal end of the needle 400 is connected to the piston 300 .

[0037] The rotating ring 600 of this embodiment is connected to the proximal end of the sampling tube 100 in a manner that it can rotate around its own axis. Specifically, an annular groove may be provided at the proximal end of the sampling tube 100, and the rotating ring 600 may be directly installed in the annular groove.

[0038] Multiple cutting elements are arranged circumferentially between the needle 400 and the rotating ring 600. One end of the cutting element 500 is connected to the proximal end of the needle 400, and the other end is connected to the rotating ring 600. The cutting element 500 is configured to be deformable under the action of external force.

[0039] Combined with attachment Figures 3-6 As shown, when sampling, the distal end of the needle 400 and the cutting member 500 are first inserted into the pathological area, and then the piston 300 is rotated to drive the distal end of the needle 400 to move from the outside of the sampling tube 100 to the inside of the sampling tube 100. During this process, the cutting member 500, the needle 400 and the rotating ring 600 rotate synchronously to cut, and the cutting member 500 is deformed to form a Figure 5 and 6 In the state, and under the negative pressure of the head 310 of the piston 300, the cut pathology is sucked into the sampling tube 100 to complete the sampling.

[0040] The sampling structure and the sampling process are different from the way of piercing the pathological tissue with the needle 400 and sucking in the related art. The needle 400 and the cutting member 500 are first used to pierce the pathological tissue, and then the needle 400 and the cutting member 500 are rotated by the piston member 300 to cut the pathological tissue. The cut pathological tissue can be sucked into the sampling tube 100 by the piston member 300 for sampling. Since the cutting member 500 can cut the pathological tissue into pieces, and the diameter of the sampling tube 100 is larger than the radial dimension of the needle 400, the problem of blockage of the needle 400 of the sampling device can be reduced, the sampling efficiency is improved, and the sampling difficulty is reduced.

[0041] In combination with the accompanying drawings Figure 1 and the accompanying drawings Figure 2 As shown in the accompanying drawings, in some examples, the outer surface of the plurality of cutting members 500 forms a conical contour when the distal end of the needle 400 of the embodiment is optionally located outside the sampling tube 100, thereby facilitating the piercing of the distal end of the needle 400 and the cutting member 500 into the pathological tissue.

[0042] In combination with the accompanying drawings Figures 3-6 As shown in the accompanying drawings, in some examples, the needle 400 includes a tip portion 410, a main body portion 420, and a spiral conveying portion 430. The tip portion 410 is located at the distal end of the main body portion 420 and is integrally connected or integrally formed with the main body portion 420. The spiral conveying portion 430 extends in a spiral shape on the outer peripheral surface of the main body portion 420 along the axial direction of the main body portion 420. The spiral conveying portion 430 can also be integrally connected or integrally formed with the main body portion 420. The integrally connected means that the connection is integrally formed by welding, bonding, or the like. The integrally formed means that the structure is integrally formed by injection molding or the like during processing.

[0043] The spiral conveying portion 430 of the above structure can be a spiral protrusion or a sheet structure. When the needle 400 rotates, the structure can convey the pathological tissue from the distal end to the proximal end of the sampling tube 100.

[0044] In combination with the accompanying drawings Figure 2 In order to facilitate the removal of the pathological tissue from the sampling tube 100, in some examples, the sampling tube 100 is provided with a sampling outlet 121 and a second blocking portion 122 covering the sampling outlet 121. The second blocking portion 122 is detachably connected to the sampling tube 100.

[0045] The second blocking portion 122 can be bonded to the sampling tube 100 or connected to the sampling tube 100 by hot pressing or the like. However, the connection area is small, so it can be convenient for medical personnel to tear off.

[0046] In some examples, optionally, along the distal end to the proximal end of the sampling device, the sampling tube 100 comprises a first portion 110 and a second portion 120 connected in sequence, the radial dimension of the first portion 110 is smaller than the radial dimension of the second portion 120, the rotating ring 600 is connected to the distal end of the first portion 110, the proximal end of the second portion 120 is connected with the needle tube 200, and the head 310 is located in the second portion 120.

[0047] The second portion 120 is provided with the second blocking part 122, the sample outlet 121 and the first blocking part 124 as described above, and the second portion 120 forms a sampling chamber, and the radial dimension of the first portion 110 is designed to be smaller so as to facilitate the generation of a larger negative pressure at the distal end of the first portion 110 when the head 310 of the piston member 300 moves, thereby facilitating the suction of the cut pathological tissue and facilitating the entry of the pathological tissue from the first portion 110 into the sampling chamber of the second portion 120.

[0048] Based on the above structure, the applicant finds that the existing sampling devices are all disposable consumables, and the needle tube 200 and the needle head 400 are discarded after use, causing waste and environmental pollution, and therefore the structure of the sampling device is further improved in this embodiment, which is designed as a detachable structure, and after sampling, the sampling tube 100 can be discarded, while the needle tube 200 and part of the piston rod are retained.

[0049] In combination with the drawings Figures 2-6 As shown in some examples, the second portion 120 of the present embodiment is detachably connected with the needle tube 200, and the detachable connection can be the insertion or threaded connection of the second portion 120 of the sampling tube 100 with the needle tube 200.

[0050] Specifically, it can be as Figure 4 and 6 As shown, a first protrusion 123 is arranged on the end face of the proximal end of the second portion 120, and a first slot 210 is arranged on the end face of the distal end of the needle tube 200, and the first protrusion 123 and the first slot 210 are inserted. Alternatively, one of the internal thread and the external thread is arranged on the second portion 120, and the other of the internal thread and the external thread is arranged on the needle tube 200, and the internal thread and the external thread are screwed (this embodiment is not shown in the figure).

[0051] After sampling, the connection between the second portion 120 of the sampling tube 100 and the needle tube 200 can be released, and then the sampling tube 100 is discarded, while the needle tube 200 is retained.

[0052] Further, in order to facilitate the retention of most of the structure of the piston 300, in some examples, the rod 320 of the present embodiment can optionally be designed to include a first rod body 321 and a second rod body 322, the length of the first rod body 321 being less than the length of the second rod body 322, for example, the length of the first rod body 321 being one-twentieth to one-tenth of the length of the second rod body 322.

[0053] The distal end of the first rod body 321 of the present embodiment is fixedly connected with the head 310, and the proximal end of the first rod body 321 is detachably connected with the distal end of the second rod body 322.

[0054] The detachable connection can be in various forms, such as clamping, insertion or threaded connection, but when the first rod body 321 and the second rod body 322 are threaded, the rotation of the second rod body 322 driving the first rod body 321 can easily cause the threaded connection between the two to loosen, so the present embodiment inserts the first rod body 321 and the second rod body 322.

[0055] Specifically, a second protrusion 3221 can be provided on the second rod body 322, and a second slot 3211 can be provided on the first rod body 321, the second protrusion 3221 and the second slot 3211 being inserted and matched, and the size of the second protrusion 3221 can be designed to be slightly larger than that of the second slot 3211 to improve the stability of the connection between the two.

[0056] After sampling, the sampling tube 100 and the needle tube 200 are pulled in the opposite direction to release the connection of the second part 120 of the sampling tube 100, and at the same time the connection between the first rod body 321 and the second rod body can be released, leaving the needle tube 200 and the piston 300 for next use, and then removing the pathology by tearing off the second blocking part 122, and then discarding the sampling tube 100, the needle 400 and the piston head after sampling.

[0057] Again in combination with the drawings shown in Figure 1 , 2 , 3 and 5, in some examples, the proximal end of the rod 320 can optionally extend out of the sampling tube 100 and be provided with a rotating handle 323. By configuring the rotating handle 323, it is convenient for medical staff to rotate the piston 300.

[0058] Although the present utility model discloses as above, the present utility model is not limited thereto. Any person skilled in the art, without departing from the spirit and scope of the present utility model, can make various changes and modifications, therefore the protection scope of the present utility model should be limited by the scope defined by the claims.

[0059] Finally, it should be noted that, in the subject specification, terms such as first and second, or the like, are used merely to distinguish one entity or action from another, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0060] The various embodiments in the specification are described in progressive manner, each embodiment focuses on the difference from other embodiments, and the same or similar parts between various embodiments can be referred to each other.

[0061] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tissue sampling device that is resistant to needle clogging and can be partially recycled, characterized in that: It includes a sampling tube, a needle tube, a piston, a needle, a cutting piece and a rotating ring; The distal end of the sampling tube is open, and the proximal end of the sampling tube is closed by a first blocking portion and connected to the distal end of the needle tube; The piston member includes a head and a rod, wherein the head is disposed in the sampling tube and is sealed and slidably fitted with the inner circumference of the sampling tube; the rod is located in the needle tube, the distal end of the rod passes through the first blocking portion and is connected to the head, and the proximal end of the rod is threadedly connected to the needle tube; The distal end of the needle is located outside the sampling tube, and the proximal end of the needle is connected to the piston member; The rotating ring is connected to the proximal end of the sampling tube in a manner that it can rotate around its own axis; A plurality of cutting elements are arranged circumferentially and spaced apart between the needle and the rotating ring, one end of the cutting element is connected to the proximal end of the needle, and the other end is connected to the rotating ring, and the cutting element is configured to be deformable under the action of an external force; Wherein, rotating the piston can drive the distal end of the needle to move from outside the sampling tube to inside the sampling tube.

2. The sampling device according to claim 1, characterized in that When the distal end of the needle is located outside the sampling tube, the outer surfaces of the plurality of cutting elements form a tapered profile.

3. The sampling device according to claim 1, characterized in that The needle includes a tip portion, a main body portion, and a spiral conveying portion. The tip portion is located at the distal end of the main body portion. The spiral conveying portion extends spirally along the axial direction of the main body portion on the outer circumference of the main body portion.

4. The sampling device according to claim 1, characterized in that A sample outlet and a second blocking portion covering the sample outlet are provided on the tube wall of the sampling tube, and the second blocking portion is detachably connected to the sampling tube.

5. The sampling device according to claim 1, characterized in that From the distal end to the proximal end of the sampling device, the sampling tube includes a first part and a second part connected in sequence, the radial dimension of the first part is smaller than the radial dimension of the second part, the rotating ring is connected to the distal end of the first part, the proximal end of the second part is connected to the needle tube, and the head is located in the second part.

6. The sampling device according to claim 5, characterized in that The second part is detachably connected to the needle tube.

7. The sampling device according to claim 6, characterized in that The second part is plugged or threadedly connected to the needle tube.

8. The sampling device according to claim 6, characterized in that The rod portion includes a first rod body and a second rod body, the length of the first rod body is smaller than the length of the second rod body, the distal end of the first rod body is fixedly connected to the head, the proximal end of the first rod body is detachably connected to the distal end of the second rod body, and the distal end of the second rod body is threadedly connected to the inner wall of the needle tube.

9. The sampling device according to claim 8, characterized in that The first rod body and the second rod body are plugged into each other.

10. The sampling device according to any one of claims 1 to 9, characterized in that: The proximal end of the rod extends out of the sampling tube and is provided with a rotating handle.

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