Tumor needle biopsy needle

Abstract

The utility model discloses a tumor needle biopsy needle which comprises a handle and a sampling needle. An inner tube body is arranged at the front end of the handle, an inner needle core mounting seat is arranged at the front end of the inner tube body, an inner needle core fixing groove is formed in the upper portion of the inner needle core mounting seat, a firing mechanism extending into the inner tube body is arranged in the handle, an outer sleeve mounting seat is arranged in front of the inner needle core mounting seat, and an outer sleeve fixing groove is formed in the upper portion of the outer sleeve mounting seat. A plurality of guide rods are connected between the outer sleeve mounting seat and the percussion mechanism, penetrate through the inner needle core mounting seat and avoid the inner needle core fixing groove; the sampling needle comprises an inner needle core and an outer sleeve, the inner needle core is arranged in the outer sleeve in a penetrating mode, a sampling groove is formed in the position, close to the front end, of the outer portion of the inner needle core, an inner needle core clamping block clamped in the inner needle core fixing groove is arranged at the rear end of the inner needle core, and an outer sleeve clamping block clamped in the outer sleeve fixing groove is arranged at the rear end of the outer sleeve. The inner needle core and the outer sleeve are convenient to replace, so that the use cost is reduced, and the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of tumor biopsy, in particular to a tumor puncture biopsy needle. Background Technique

[0002] A tumor puncture biopsy needle is a special needle tool dedicated to tissue sampling of a suspected tumor site. A tumor puncture biopsy needle generally includes a handle part, an inner needle core and an outer sleeve tube. The tip of the inner needle core is generally designed with a sampling groove (generally about 20 mm). The tumor tissue is cut by manual or automatic forward firing of the outer sleeve tube to achieve sampling. Specifically, reference can be made to a puncture biopsy needle disclosed in Chinese Utility Model Patent CN212118188U.

[0003] Existing tumor puncture biopsy needles are generally disposable items and are discarded as a whole after use, with relatively high costs. The handle parts of some tumor puncture biopsy needles can be reused, but when replacing the inner needle core and the outer sleeve tube, it is necessary to open the housing of the handle, and the replacement is very troublesome. Content of the Utility Model

[0004] Aiming at the defects in the prior art, the utility model provides a tumor puncture biopsy needle, which is convenient for replacing the inner needle core and the outer sleeve tube, not only reducing the use cost, but also being convenient to operate.

[0005] The utility model provides a tumor puncture biopsy needle;

[0006] It includes a handle and a sampling needle;

[0007] The front end of the handle is provided with an inner tube body, the front end of the inner tube body is provided with an inner needle core mounting seat, the upper part of the inner needle core mounting seat is provided with an inner needle core fixing groove, a firing mechanism extending into the inner tube body is arranged in the handle, the front of the inner needle core mounting seat is provided with an outer sleeve tube mounting seat, the upper part of the outer sleeve tube mounting seat is provided with an outer sleeve tube fixing groove, and a plurality of guide rods are connected between the outer sleeve tube mounting seat and the firing mechanism. The guide rods pass through the inner needle core mounting seat and avoid the inner needle core fixing groove;

[0008] The sampling needle includes an inner needle core and an outer sleeve tube. The inner needle core is sleeved in the outer sleeve tube. A sampling groove is arranged at the front end of the outer part of the inner needle core. An inner needle core clamping block clamped in the inner needle core fixing groove is arranged at the rear end of the inner needle core. An outer sleeve tube clamping block clamped in the outer sleeve tube fixing groove is arranged at the rear end of the outer sleeve tube.

[0009] Further, it further includes a limit sleeve, which is axially movably installed at the front end of the handle and can be sleeved outside the inner needle core mounting seat and the outer sleeve tube mounting seat or expose the inner needle core mounting seat and the outer sleeve tube mounting seat. When the limit sleeve is sleeved outside the inner needle core mounting seat and the outer sleeve tube mounting seat, it can limit the inner needle core block in the inner needle core fixing groove and the outer sleeve tube block in the outer sleeve tube fixing groove.

[0010] Further, an outer tube body is provided at the front end of the handle. The outer tube body surrounds the inner tube body, and an annular cavity is formed between the outer tube body and the inner tube body. An inner convex ring is provided at the front end of the outer tube body. The rear end of the limit sleeve penetrates into the annular cavity and is provided with an outer convex ring limited on the front side of the inner convex ring. A first spring is provided in the annular cavity and supports on the rear side of the outer convex ring.

[0011] Further, the limit sleeve is a circular tube, and the inner needle core mounting seat and the outer sleeve tube mounting seat are circular blocks adapted to the inside of the limit sleeve. Openings for the inner needle core to pass through are provided on the front groove wall of the inner needle core fixing groove and the rear groove wall of the outer sleeve tube fixing groove. An opening for the outer sleeve tube to pass through is provided on the front groove wall of the outer sleeve tube fixing groove.

[0012] Further, four guide rods are provided around the inner needle core fixing groove.

[0013] Further, the firing mechanism includes a firing head, a second spring, a locking structure and a trigger switch;

[0014] The firing head is axially movably installed in the handle. The front end of the firing head extends into the inner tube body. A snap structure is provided at the rear end of the firing head. A support platform is provided in the handle behind the firing head. The second spring supports between the firing head and the support platform;

[0015] The locking structure is provided in the handle. Two loading blocks extending out of both sides of the handle are provided outside the firing head. Pushing the two loading blocks backward can drive the firing head to move backward and compress the second spring, and lock the snap structure at the rear end of the firing head with the locking structure;

[0016] The trigger switch is used to release the lock between the locking structure and the snap structure.

[0017] Further, the snap structure is a snap ring provided on the outer edge of the firing head, and the locking structure is an elastic arm provided behind the snap ring and fixed at the rear end in the handle. A clamping groove capable of being clamped and matched with the snap ring is provided on the side of the elastic arm;

[0018] The trigger switch is a pressing member movably installed at the rear end of the handle. The front end of the pressing member extends into the handle and is provided with a driving inclined surface that abuts against the front end of the elastic arm. The pressing member can drive the elastic arm to bend away from the snap ring through the driving inclined surface, so that the snap ring exits the card slot.

[0019] Furthermore, it further includes a safety pin, and the safety pin can be inserted into or withdrawn from the handle and the pressing member to lock or unlock the pressing member.

[0020] The beneficial effects of the present utility model are reflected in:

[0021] In this application, an inner needle core mounting seat is provided at the front end of the inner tube body, an outer sleeve tube mounting seat is provided in front of the inner needle core mounting seat, and the outer sleeve tube mounting seat is connected to the firing mechanism through a guide rod passing through the inner needle core mounting seat. The inner needle core mounting seat has the function of stabilizing the guide rod. When installing the sampling needle, first insert the inner needle core into the outer sleeve tube, and then respectively snap the inner needle core block at the rear end of the inner needle core into the inner needle core fixing groove on the inner needle core mounting seat, and snap the outer sleeve tube block at the rear end of the outer sleeve tube into the outer sleeve tube fixing groove on the outer sleeve tube mounting seat. The installation of the inner needle core and the outer sleeve tube is convenient. When in use, after the inner needle core pierces the suspected tumor site, the tumor tissue enters the sampling groove outside the inner needle core, and then the outer sleeve tube is driven forward by the firing mechanism to cut the tumor tissue to achieve sampling. Therefore, compared with the prior art, this application is convenient for replacing the inner needle core and the outer sleeve tube, not only reducing the use cost, but also being convenient to operate. Description of the Drawings

[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0023] Figure 1 It is a top view of an embodiment of the present utility model;

[0024] Figure 2 It is Figure 1 the A-A cross-sectional view of

[0025] Figure 3 It is Figure 1 the B-B cross-sectional view of

[0026] Figure 4 It is Figure 1 the C-C cross-sectional view of

[0027] Figure 5 It is Figure 1 the D-D cross-sectional view of

[0028] In the attached drawings, 100 is the handle; 110 is the inner tube body; 120 is the needle core mounting seat; 121 is the inner needle core fixing groove; 130 is the firing mechanism; 131 is the firing head; 1311 is the snap ring; 1312 is the cocking block; 132 is the second spring; 133 is the elastic arm; 1331 is the card slot; 134 is the pressing member; 140 is the outer tube mounting seat; 141 is the outer tube fixing groove; 150 is the guide rod; 160 is the outer tube body; 161 is the annular cavity; 162 is the inner convex ring; 170 is the support platform; 180 is the safety pin; 200 is the sampling needle; 210 is the inner needle core; 211 is the sampling groove; 212 is the inner needle core clamping block; 220 is the outer tube; 221 is the outer tube clamping block; 300 is the limiting sleeve; 310 is the outer convex ring; 320 is the first spring. Detailed implementation manners

[0029] The embodiments of the technical solution of the present invention will be described in detail below with reference to the attached drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0030] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present invention belongs.

[0031] As Figures 1-5 shown, the embodiment of the present invention provides a tumor puncture biopsy needle, which includes a handle 100 and a sampling needle 200.

[0032] The front end of the handle 100 is provided with an inner tube body 110. The front end of the inner tube body 110 is provided with an inner needle core mounting seat 120. The upper part of the inner needle core mounting seat 120 is provided with an inner needle core fixing groove 121. A firing mechanism 130 extending into the inner tube body 110 is arranged in the handle 100. An outer tube mounting seat 140 is arranged in front of the inner needle core mounting seat 120. The upper part of the outer tube mounting seat 140 is provided with an outer tube fixing groove 141. A plurality of guide rods 150 are connected between the outer tube mounting seat 140 and the firing mechanism 130. The guide rods 150 pass through the inner needle core mounting seat 120 and avoid the inner needle core fixing groove 121.

[0033] The sampling needle 200 includes an inner needle core 210 and an outer tube 220. The inner needle core 210 is sleeved in the outer tube 220. A sampling groove 211 is arranged at the front end of the outer part of the inner needle core 210. An inner needle core clamping block 212 clamped in the inner needle core fixing groove 121 is arranged at the rear end of the inner needle core 210. An outer tube clamping block 221 clamped in the outer tube fixing groove 141 is arranged at the rear end of the outer tube 220.

[0034] In this application, an inner needle core mounting seat 120 is provided at the front end of the inner tube body 110, and an outer sleeve tube mounting seat 140 is provided in front of the inner needle core mounting seat 120. The outer sleeve tube mounting seat 140 is connected to the firing mechanism 130 through a guide rod 150 passing through the inner needle core mounting seat 120. The inner needle core mounting seat 120 functions to stabilize the guide rod 150. When installing the sampling needle 200, first insert the inner needle core 210 into the outer sleeve tube 220, and then respectively snap the inner needle core clamping block 212 at the rear end of the inner needle core 210 into the inner needle core fixing groove 121 on the inner needle core mounting seat 120, and snap the outer sleeve tube clamping block 221 at the rear end of the outer sleeve tube 220 into the outer sleeve tube fixing groove 141 on the outer sleeve tube mounting seat 140. The installation of the inner needle core 210 and the outer sleeve tube 220 is convenient. During use, after the inner needle core 210 penetrates into the suspected tumor site, the tumor tissue enters the sampling groove 211 outside the inner needle core 210, and then the outer sleeve tube 220 is driven forward by the firing mechanism 130 to cut the tumor tissue, achieving sampling. Therefore, compared with the prior art, this application facilitates the replacement of the inner needle core 210 and the outer sleeve tube 220, not only reducing the use cost but also being convenient to operate.

[0035] Referring to Figures 2-5 , this embodiment further includes a limit sleeve 300. The limit sleeve 300 is axially movably installed at the front end of the handle 100 and can be sleeved outside the needle core mounting seat 120 and the outer sleeve tube mounting seat 140 or expose the needle core mounting seat 120 and the outer sleeve tube mounting seat 140. When the limit sleeve 300 is sleeved outside the needle core mounting seat 120 and the outer sleeve tube mounting seat 140, it can limit the inner needle core clamping block 212 in the inner needle core fixing groove 121 and the outer sleeve tube clamping block 221 in the outer sleeve tube fixing groove 141, thereby preventing the inner needle core clamping block 212 from exiting the inner needle core fixing groove 121 and the outer sleeve tube clamping block 221 from exiting the outer sleeve tube fixing groove 141, making the installation of the inner needle core 210 and the outer sleeve tube 220 more secure and preventing the inner needle core 210 and the outer sleeve tube 220 from falling off the handle 100.

[0036] Preferably, an outer tube body 160 is provided at the front end of the handle 100. The outer tube body 160 surrounds the outer side of the inner tube body 110. An annular cavity 161 is formed between the outer tube body 160 and the inner tube body 110. An inner convex ring 162 is provided at the front end of the outer tube body 160. The rear end of the limit sleeve 300 penetrates into the annular cavity 161 and is provided with an outer convex ring 310 limited on the front side of the inner convex ring 162. A first spring 320 is provided in the annular cavity 161 and supported on the rear side of the outer convex ring 310. When the sampling needle 200 needs to be installed, the limit sleeve 300 is pushed backward to expose the inner needle core mounting seat 120 and the outer sleeve mounting seat 140. Then, the inner needle core block 212 at the rear end of the inner needle core 210 is respectively snapped into the inner needle core fixing groove 121 on the inner needle core mounting seat 120, and the outer sleeve block 221 at the rear end of the outer sleeve 220 is snapped into the outer sleeve fixing groove 141 on the outer sleeve mounting seat 140. Then, the limit sleeve 300 is released. The limit sleeve 300 moves forward under the action of the first spring 320 and sleeves outside the inner needle core mounting seat 120 and the outer sleeve mounting seat 140, so as to lock the inner needle core mounting seat 120 and the outer sleeve mounting seat 140, and the operation is convenient.

[0037] In this embodiment, the limit sleeve 300 is a circular tube, the inner needle core mounting seat 120 and the outer sleeve mounting seat 140 are circular blocks adapted to be inside the limit sleeve 300. The front groove wall of the inner needle core fixing groove 121 and the rear groove wall of the outer sleeve fixing groove 141 are both provided with openings for the inner needle core 210 to pass through. The front groove wall of the outer sleeve fixing groove 141 is provided with an opening for the outer sleeve 220 to pass through. In this way, the inner needle core mounting seat 120 and the outer sleeve mounting seat 140 can play a role in guiding and supporting the limit sleeve 300.

[0038] In this embodiment, referring to Figure 3 and Figure 5 , four guiding rods 150 are provided around the inner needle core fixing groove 121.

[0039] Referring to Figure 1 and Figure 2 , the firing mechanism 130 includes a firing head 131, a second spring 132, a locking structure and a trigger switch.

[0040] The firing head 131 is axially movably installed in the handle 100. The front end of the firing head 131 extends into the inner tube body 110. A snap structure is provided at the rear end of the firing head 131. A support platform 170 is provided in the handle 100 behind the firing head 131. The second spring 132 is supported between the firing head 131 and the support platform 170.

[0041] The locking structure is provided in the handle 100. Two loading toggles 1312 extending out of both sides of the handle 100 are provided outside the firing head 131. Pushing the two loading toggles 1312 backward can drive the firing head 131 to move backward and compress the second spring 132, and lock the snap structure at the rear end of the firing head 131 with the locking structure.

[0042] The trigger switch is used to contact and lock between the buckle structure and the snap structure.

[0043] In this embodiment, the snap structure is specifically a snap ring 1311 provided on the outer edge of the firing head 131, and the locking structure is an elastic arm 133 provided behind the snap ring 1311 and fixed at the rear end within the handle 100. A slot 1331 capable of being snap-fitted with the snap ring 1311 is provided on the side of the elastic arm 133.

[0044] The trigger switch is specifically a pressing member 134 movably installed at the rear end of the handle 100. The front end of the pressing member 134 extends into the handle 100 and is provided with a driving inclined surface that abuts against the front end of the elastic arm 133. The pressing member 134 can drive the elastic arm 133 to bend away from the snap ring 1311 through the driving inclined surface, so that the snap ring 1311 exits the slot 1331.

[0045] Refer to Figure 2 , when the firing mechanism 130 is loaded, by moving two loading blocks 1312 backward, the firing head 131 can be driven to move backward and compress the second spring 132, so that the snap ring 1311 at the rear end of the firing head 131 snaps into the slot 1331 on the side of the elastic arm 133, and the firing head 131 is locked. When firing, the finger presses the pressing member 134, and the pressing member 134 drives the elastic arm 133 to bend away from the snap ring 1311 through the driving inclined surface, so that the snap ring 1311 exits the slot 1331. The firing head 131 is fired forward under the action of the second spring 132, thereby driving the outer sleeve mounting seat 140 to move forward through the guide rod 150, so as to drive the outer sleeve 220 to cut the tumor tissue forward.

[0046] This embodiment further includes a safety pin 180, and the safety pin 180 can be inserted into or withdrawn from the handle 100 and the pressing member 134 to lock or unlock the pressing member 134. During the puncture process, the pressing member 134 can be locked by the safety pin 180 to prevent accidental pressing. When cutting the tumor tissue, the safety pin 180 is removed to release the lock on the pressing member 134.

[0047] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A tumor puncture biopsy needle, comprising a handle and a sampling needle, characterized in that: An inner tube body is provided at the front end of the handle, an inner needle core mounting seat is provided at the front end of the inner tube body, an inner needle core fixing groove is provided at the upper part of the inner needle core mounting seat, a firing mechanism extending into the inner tube body is provided in the handle, an outer sleeve mounting seat is provided in front of the inner needle core mounting seat, an outer sleeve fixing groove is provided at the upper part of the outer sleeve mounting seat, a plurality of guide rods are connected between the outer sleeve mounting seat and the firing mechanism, and the guide rods pass through the inner needle core mounting seat and avoid the inner needle core fixing groove; The sampling needle includes an inner needle core and an outer sleeve, the inner needle core is inserted into the outer sleeve, a sampling groove is provided on the outside of the inner needle core near the front end, an inner needle core clamping block is provided at the rear end of the inner needle core and is clamped in the inner needle core fixing groove, and an outer sleeve clamping block is provided at the rear end of the outer sleeve and is clamped in the outer sleeve fixing groove.

2. The tumor puncture biopsy needle according to claim 1, characterized in that: It also includes a limiting sleeve, which is movably installed at the front end of the handle along the axial direction and can be sleeved outside the needle core mounting seat and the outer sleeve mounting seat or expose the needle core mounting seat and the outer sleeve mounting seat. When the limiting sleeve is sleeved outside the needle core mounting seat and the outer sleeve mounting seat, the inner needle core block can be limited to the inner needle core fixing groove, and the outer sleeve block can be limited to the outer sleeve fixing groove.

3. The tumor puncture biopsy needle according to claim 2, characterized in that: An outer tube body is provided at the front end of the handle, and the outer tube body surrounds the inner tube body to form an annular cavity between the outer tube body and the inner tube body. An inner convex ring is provided at the front end of the outer tube body, and the rear end of the limiting sleeve penetrates into the annular cavity and is provided with an outer convex ring limited to the front side of the inner convex ring. A first spring supported on the rear side of the outer convex ring is provided in the annular cavity.

4. The tumor puncture biopsy needle according to claim 3, characterized in that: The limiting sleeve is a round tube, the inner needle core mounting seat and the outer tube mounting seat are round blocks adapted to fit inside the limiting sleeve, the front groove wall of the inner needle core fixing groove and the rear groove wall of the outer tube fixing groove are both provided with openings for the inner needle core to pass through, and the front groove wall of the outer tube fixing groove is provided with an opening for the outer tube to pass through.

5. The tumor puncture biopsy needle according to claim 1, characterized in that: Four guide rods are arranged around the inner needle core fixing groove.

6. The tumor puncture biopsy needle according to any one of claims 1 to 5, characterized in that: The firing mechanism includes a firing head, a second spring, a locking structure and a trigger switch; The firing head is movably installed in the handle along the axial direction, the front end of the firing head extends into the inner tube, the rear end of the firing head is provided with a buckle structure, a support platform is provided in the handle behind the firing head, and the second spring is supported between the firing head and the support platform; The locking structure is arranged in the handle, and two loading blocks extending from two sides of the handle are arranged outside the firing head. Pushing the two loading blocks backward can drive the firing head to move backward and compress the second spring, so that the buckle structure at the rear end of the firing head is locked with the locking structure; The trigger switch is used to contact the locking between the locking structure and the buckle structure.

7. The tumor puncture biopsy needle according to claim 6, wherein: The snap structure is a snap ring provided on the outer edge of the firing head, the locking structure is an elastic arm provided behind the snap ring and fixed at the rear end within the handle, and a card slot capable of being engaged with the snap ring in a snap-fit manner is provided on the side of the elastic arm; The trigger switch is a pressing member movably installed at the rear end of the handle, the front end of the pressing member extends into the handle and is provided with a driving inclined surface that abuts against the front end of the elastic arm, and the pressing member can drive the elastic arm to bend away from the snap ring through the driving inclined surface so that the snap ring withdraws from the card slot.

8. The tumor puncture biopsy needle according to claim 7, wherein: It further includes a safety pin, and the safety pin can be inserted into or withdrawn from the handle and the pressing member to lock or unlock the pressing member.

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