A positioning puncture needle

Abstract

The application provides a positioning puncture needle, which comprises a puncture handle, a puncture needle arranged on the puncture handle, a pushing handle, a pushing tube arranged on the pushing handle and a locking piece. The pushing tube is arranged in the puncture needle through the puncture handle, the first end of the locking piece is matched with the pushing handle to form a clamping structure for limiting displacement of the locking piece in the opposite direction of the puncture needle, and the locking device is further included. After the pushing tube is pushed to the position, the locking device locks the position of the locking piece, so that the locking piece cannot be displaced. The locking device is arranged to fix the locking piece at the position after the pushing tube is pushed to the position, thereby improving the accuracy of puncture positioning. In addition, the problem that the locking piece is difficult to be taken out due to the withdrawal of the pushing tube under external force is avoided, and the stability and safety of the operation are improved.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a positioning puncture needle. Background Art

[0002] Lung nodules in early-stage lung cancer, precancerous lesions, or suspected early-stage lung cancer are often small in size and have deep lesions, making them sometimes difficult to locate during thoracoscopy. The current mainstream method for locating lung nodules is to use a positioning puncture needle under CT guidance, which mainly relies on the hook at the front end of the positioning puncture needle to hook the lung tissue next to the lesion for positioning. In the prior art, a lung nodule positioning puncture needle with a flexible positioning rope usually adopts a method in which a push tube and an anchor hook are sheathed in the puncture needle, a flexible positioning rope is sheathed in the push tube, and an anchor hook is installed at the end of the flexible positioning rope in a bent state. When in use, the push tube and the anchor hook are delivered into the patient's body through the puncture needle. Patent CN219940749U proposes a lung nodule positioning puncture needle. The puncture needle includes a push handle, a puncture needle, a push tube, and a locking member. The locking member cooperates with the push handle to form a locking structure, so that the push handle cannot move in the opposite direction of the puncture needle during pushing. After positioning using the puncture needle of this patent, it is necessary to remove the locking piece that acts as a limiter, withdraw the push tube, and then remove the puncture needle, leaving the positioning line and anchor hook at the lesion position for marking. In practice, it has been found that after the puncture needle is pushed, the needle tip at its distal end will penetrate into the interior of the lung tissue. The push handle is connected to the push tube, and pressing the push handle pushes out the anchor hook in the push tube and releases it. After it is released, no pressure is applied to the push handle. At this time, due to the elasticity of the lung tissue, the anchor hook pushed out of the push tube will be pushed back. The pushed anchor hook acts on the push tube, causing the push handle to move in the opposite direction of puncture. Due to the locking structure limitation of the locking piece, the locking piece cannot be removed after the puncture handle moves in the opposite direction, and the subsequent withdrawal operation cannot be carried out. Therefore, this application further improves patent CN219940749U to address the above technical problems. On the one hand, a design is added to solve the problem of the push tube retraction after the anchor hook is released. On the other hand, a positioning needle with an easy-to-remove locking piece is provided. Summary of the Invention

[0003] The present application provides a positioning puncture needle, which fixes the locking piece in the position after the push tube is pushed into place by setting a locking device, thereby improving the accuracy of puncture positioning and avoiding the problem of the push tube retreating under the action of external force, which makes it difficult to remove the locking piece.

[0004] The present invention provides a positioning puncture needle, comprising a puncture handle, a puncture needle arranged on the puncture handle, a pushing handle, a pushing tube arranged on the pushing handle, and a locking piece; the pushing tube passes through the puncture handle and is placed in the puncture needle, the first end of the locking piece cooperates with the pushing handle to form a locking structure that limits the displacement of the locking piece in the opposite direction toward the puncture needle, and also includes a locking device, which locks the position of the locking piece after the pushing tube is pushed into place, so that the locking piece cannot be displaced.

[0005] Furthermore, the locking device is a barb provided at the second end of the locking piece, and the locking piece is displaced in the puncture direction as the pushing tube is pushed. The barb is unfolded after the pushing tube is pushed into place, locking the position of the locking piece so that the locking piece cannot produce displacement in the opposite direction of the puncture needle.

[0006] Furthermore, the barbs are provided on one or more sides of the second end of the locking member.

[0007] Furthermore, the locking device is arranged on the puncture handle, and the puncture handle is provided with a slide groove, and the slide groove is used to cooperate with the movement of the locking piece in the puncture direction; the locking device is arranged on the slide groove wall, and the locking piece is provided with a locking groove. After the pushing tube is pushed into place, the locking device is expanded to insert into the locking groove, so that the locking piece cannot be displaced, or the locking device is arranged on the locking piece, and the slide groove wall is provided with a locking groove. After the pushing tube is pushed into place, the locking device is expanded to insert into the locking groove, so that the locking piece cannot be displaced.

[0008] Furthermore, the locking device is an elastic member, and the locking groove is a limiting hole adapted to the diameter of the elastic member.

[0009] Furthermore, the elastic member is a spring and a rigid end connected to each other, one end of the spring is fixed on the slide groove, and the other end of the spring is connected to the rigid end.

[0010] Furthermore, it also includes a straight-through slide groove, which is integrally arranged with the puncture handle and forms an acute angle with the slide groove of the puncture handle; the groove of the straight-through slide groove is adapted to the locking piece with the barbs in the expanded state, and the locking piece with the barbs in the expanded state can slide relatively on the straight-through slide groove.

[0011] Further, the locking member further comprises a weak connection part, which divides the locking member into a locking part and a screwing part, and the screwing part is arranged at the first end of the locking member; after the screwing part is screwed, the weak connection part is broken, and the screwing part is detached; the locking part is provided with the locking device, and after the screwing part is detached, the locking part is locked on the sliding groove.

[0012] The application provides a positioning puncture needle, which comprises a puncture handle, a puncture needle arranged on the puncture handle, a pushing handle, a pushing tube arranged on the pushing handle and a locking member; the pushing tube is arranged in the puncture needle through the puncture handle, the first end of the locking member is matched with the pushing handle to form a clamping structure for limiting displacement of the locking member in the opposite direction of the puncture needle, the puncture handle is provided with a sliding groove, and the sliding groove is used for matching movement of the locking member in the puncture direction; the positioning puncture needle further comprises a pop-up device, which is arranged on the puncture handle and arranged on the wall of the sliding groove; after the pushing tube is pushed to the position, the pop-up device pops up the locking member in the radial direction.

[0013] Compared with the prior art, the application has at least the following beneficial effects:

[0014] 1. The locking device is arranged to fix the locking member at the position after the pushing tube is pushed to the position, so that the relative position of the pushing handle and the puncture handle is fixed, which can ensure complete release of the anchor hook at the lesion position and improve the accuracy of puncture positioning; in addition, the problem that the locking member is difficult to take out due to withdrawal of the pushing tube under external force during the release process is avoided, and the stability and safety of the operation are improved.

[0015] 2. The straight sliding groove or the weak connection part is arranged for different locking devices, which can conveniently take down the locking device for subsequent withdrawal operation under the premise of ensuring complete release, and reduces the action of the puncture needle during the taking-down operation, so as to avoid affecting the position of the positioning line which has been anchored. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate an embodiment consistent with the present application and, together with the specification, serve to explain the principles of the application.

[0017] Figure 1 Fig. 1 shows a perspective structure diagram of the positioning puncture needle of one embodiment of the application.

[0018] Figure 2 Fig. 2 shows a perspective structure diagram of the positioning puncture needle of the embodiment. Figure 1 Fig. 3 shows an exploded perspective structure diagram of the positioning puncture needle of the embodiment.

[0019] Figure 3Shown is a three-dimensional structural diagram of a positioning puncture needle according to another embodiment of the present application.

[0020] Figure 4 Shown is a three-dimensional structural exploded view of a positioning puncture needle according to another embodiment of the present application.

[0021] Figure 5 Shown is a three-dimensional structural exploded view of a positioning puncture needle according to another embodiment of the present application.

[0022] Figure 6 Shown is a three-dimensional structural diagram of a positioning puncture needle according to another embodiment of the present application.

[0023] Figure 7 Shown Figure 6 A cross-sectional view of a positioning puncture needle according to an embodiment.

[0024] Figure 8 Shown is a three-dimensional structural diagram of a positioning puncture needle according to another embodiment of the present application.

[0025] Figure 9 Shown Figure 8 A three-dimensional structural diagram of the locking member for positioning the puncture needle in the illustrated embodiment.

[0026] Figure numerals: puncture handle 10, puncture needle 11, pushing handle 12, pushing tube 13, locking member 14, first end 141, second end 142, barb 16, slide groove 17, elastic member 19, limiting hole 20, straight-through channel 21, weak connection 22, locking portion 23, screwing portion 24, boss 25. DETAILED DESCRIPTION

[0027] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0028] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should have the usual meaning understood by people with ordinary skills in the field to which this application belongs. The words "include" or "comprise" and the like used in this application specification and claims mean that the elements or objects appearing before "include" or "comprise" cover the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0029] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0030] In this application, the distal end refers to the end of the medical device that is away from the operator during normal use, and the proximal end is usually the end close to the operator. The proximal end and the distal end are relative terms used to describe relative positions and do not refer to a specific part.

[0031] Regarding the usage of the positioning puncture needle in the present invention, please refer to patent CN219940749U.

[0032] The present invention provides a positioning puncture needle, comprising: a puncture handle, a puncture needle arranged on the puncture handle, a pushing handle, a pushing tube arranged on the pushing handle, and a locking piece; the pushing tube passes through the puncture handle and is placed in the puncture needle, the first end of the locking piece cooperates with the pushing handle to form a locking structure that limits the displacement of the locking piece in the opposite direction toward the puncture needle, and also includes a locking device, which locks the position of the locking piece after the pushing tube is pushed into place, so that the locking piece cannot be displaced.

[0033] Example 1:

[0034] Combine Figures 1 to 2As shown, the puncture positioning needle of the present application comprises a puncture handle 10, a puncture needle 11 on the puncture handle 10, a pushing handle 12, a pushing tube 13 on the pushing handle 12, a locking piece 14, and a barb 16 arranged at the second end 142 of the locking piece 14. The pushing tube 13 is detachably sleeved in the puncture needle 11, and the pushing tube 13 has a positioning line therein. The first end 141 of the locking piece 14 can be locked to the pushing handle 12 and moves with the pushing handle 12 in the puncture direction. The puncture handle 10 has a limiting sliding groove 17, and the locking piece 14 is partially arranged in the sliding groove 17 and can move relatively. The barb 16 is arranged at the second end 142 of the locking piece 14 and is located at the contact surface of the locking piece 14 and the sliding groove 17. After the puncture handle 10 is controlled to pierce the puncture positioning needle into the lesion, the pushing handle 12 is controlled to push the pushing tube 13 in the puncture direction, and the pushing handle 12 is considered to be pushed into place when the pushing handle 12 abuts against the puncture handle 10. When the pushing tube 13 is not pushed, the second end 142 of the locking piece 14 is located at the proximal end of the limiting sliding groove 17, and the barb 16 arranged at the second end 142 is in a contracted state under the extrusion of the channel of the limiting sliding groove 17. With the pushing action, the second end 142 of the locking piece 14 slides to the distal end of the sliding groove 17, and when the pushing handle 12 abuts against the puncture handle 10, the second end 142 of the locking piece 14 slides out of the limiting sliding groove 17, the barb 16 of the second end 142 expands and abuts against the puncture handle 10, so that the locking piece 14 cannot move in the opposite direction of the puncture direction. Due to the abutment of the puncture handle 10 and the pushing handle 12, the pushing tube 13 can no longer move in the puncture direction. In this way, the locking piece 14 and the barb 16 at the second end 142 of the locking piece 14 fix the relative position of the puncture needle 11 and the pushing tube 13, lock the position of the pushing tube 13 so that it cannot be displaced, improve the accuracy of positioning, and avoid the problem of retraction caused by operation errors or lung tissue rebounding.

[0035] In combination Figure 3 As shown, in some embodiments, the barb 16 is arranged on one or more sides of the second end 142 of the locking piece 14.

[0036] Embodiment two:

[0037] As Figure 4 Compared with embodiment one, the difference of the present embodiment is that the barb 16 is not arranged, but a resilient member 19 fixed on the sliding groove 17 is arranged. The resilient member 19 can be a spring and a rigid end connected to the free end of the spring. The rigid end can be a ball or a cylindrical metal piece, etc. When the spring is in a natural state, the rigid end can extend out of the channel plane of the sliding groove 17.

[0038] A limiting hole 20 is provided at a corresponding position on the locking member 14. When the push tube 13 is not advanced, the spring 19 is squeezed by the locking member 14 in the chute 17 section, becoming compressed. As the locking member 14 slides along the chute 17, the limiting hole 20 on the locking member 14 approaches the compressed elastic member 19. When the pushing handle 12 abuts the puncture handle 10, the opening of the limiting hole 20 aligns with the rigid end of the elastic member 19, and the spring is uncompressed and returns to its natural state. The rigid end enters the limiting hole 20 as the spring moves, locking the relative position of the locking member 14 and the puncture handle 10.

[0039] In some embodiments, a spring 19 is provided at the second end 142 of the locking member 14, and a corresponding stopper hole 20 is provided on the slide 17. When the push tube 13 is not advanced, the spring 19 on the locking member 14 is located on the slide 17 and compressed by the slide 17. After the push tube 13 is advanced into position, the spring 19 enters the stopper hole 20 to lock the relative position of the locking member 14 and the puncture handle 10, preventing them from moving.

[0040] Example 3:

[0041] like Figure 5 As shown, in the new embodiment, an elastic member 19 is provided fixed to the chute 17, but no limiting hole 20 is provided. A boss 25 is provided at the second end 141 of the locking member 14. The boss 25 is used to limit the movement of the locking member 14 on the chute 17. That is, when the boss 25 slides on the chute 17, the locking member 14 cannot be removed due to the restriction of the chute 17. When the pushing handle 12 abuts the puncture handle 10, the boss 25 moves out of the chute 17, and the locking member 14 is no longer restricted by the groove. The pressure on the spring is reduced, and the locking member 14 returns to its natural state from the compressed state. The rigid end is ejected, ejecting the locking member 14 in the radial direction, thereby achieving the purpose of removing the locking member 14.

[0042] Example 4:

[0043] like Figures 6 and 7As shown, compared to the second embodiment, the locking member 14 of this embodiment is provided with a weak connection 22. This weak connection 22 is a location that is relatively fragile and easily broken due to its material and thickness. The weak connection 22 divides the locking member 14 into a locking portion 23 and a screwing portion 24. The weak connection 22 is located between the locking device and the first end 141. The screwing portion 24 is located at the first end 141 of the locking member 14. When the screwing portion 24 is screwed, the weak connection 22 breaks and the screwing portion 24 falls off. Because the first end 141 of the locking member 14 locks the push handle 12, after the screwing portion 24 falls off, the push handle 12 is no longer constrained by the locking member 14 and can move relative to the push handle 12. Due to the action of the locking device, the locking portion 23 remains fixed to the slide groove 17 of the puncture handle 10. After the screwing portion 24 falls off, the push tube 13 can be withdrawn from the puncture needle 11. This embodiment shows another arrangement of the spring 19 , that is, springs 19 are arranged on both side walls of the groove 17 , which can enhance the fixing effect of the locking member.

[0044] Embodiment 5:

[0045] like Figures 8 and 9 As shown, compared with the first embodiment, this embodiment further includes a straight-through groove 21. The straight-through groove 21 is integrally provided with the puncture handle 10 and forms an acute angle with the slide groove 17 (not shown, refer to the position of the slide groove in the above embodiment) of the puncture handle 10; the straight-through groove 21 is in contact with the locking member 14 (as shown) with the barbs 16 in the expanded state. Figure 8 (as shown in the figure), the locking member 14 with its deployed barbs 16 can slide relative to the through-channel 21. After the barbs 16 are deployed, the locking member 14 locks the relative positions of the push handle 12 and the connecting handle. At this point, the anchor hook is fully released and positioning is successfully achieved. The next stage requires withdrawing the push tube 13 and then the puncture needle 11 to leave the positioning line in the positioning position. Lift the first end 141 of the locking member 14 away from the push handle 12, align the barbs 16 at the second end 142 with the notch of the through-channel 21, and slide the locking member 14 along the through-channel 21 and remove it. This allows the push handle 12 and puncture handle 10 to move relative to each other, allowing the puncture handle 10 to be removed. This arrangement ensures stable operation when pushing the anchor hook into position and releasing it, while also allowing the locking member 14 to be removed from the push tube 13 after successful release.

[0046] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0047] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A positioning puncture needle, comprising a puncture handle, a puncture needle disposed on the puncture handle, a push handle, a push tube disposed on the push handle, and a locking member; The push tube passes through the puncture handle and is placed in the puncture needle. The first end of the locking member cooperates with the pushing handle to form a locking structure that limits the displacement of the locking member in the opposite direction of the puncture needle. The invention is characterized in that: The invention also includes a locking device, which locks the position of the locking member after the pushing tube is pushed into place, so that the locking member cannot be displaced; the pushing handle is pushed into place when it abuts against the puncture handle; The puncture handle is provided with a limiting slide groove, and the locking part is placed in the limiting slide groove and can move relatively; The locking device is a barb provided at the second end of the locking member. The locking member moves in the puncture direction as the pushing tube pushes it. The barb is deployed after the pushing tube is pushed into place, locking the position of the locking member so that the locking member cannot cause displacement in the opposite direction of the puncture needle. It also includes a straight-through chute, which is integrally provided with the puncture handle and forms an acute angle with the limiting chute of the puncture handle; The channel of the straight-through chute is adapted to the locking piece with the barbs in the expanded state, and the locking piece with the barbs in the expanded state can slide relatively on the straight-through chute.

2. The positioning puncture needle according to claim 1, characterized in that: The barbs are arranged on one side or multiple sides of the second end of the locking member.

3. A positioning puncture needle, comprising a puncture handle, a puncture needle disposed on the puncture handle, a push handle, a push tube disposed on the push handle, and a locking member; The push tube passes through the puncture handle and is placed in the puncture needle. The first end of the locking member cooperates with the pushing handle to form a locking structure that limits the displacement of the locking member in the opposite direction of the puncture needle. The invention is characterized in that: The invention also includes a locking device, which locks the position of the locking member after the pushing tube is pushed into place, so that the locking member cannot be displaced; the pushing handle is pushed into place when it abuts against the puncture handle; The locking device is provided on the puncture handle, and the puncture handle is provided with a slide groove, and the slide groove is used to cooperate with the movement of the locking member in the puncture direction; The locking device is provided on the wall of the chute, and a locking groove is provided on the locking piece. After the pushing tube is pushed into place, the locking device is unfolded to be inserted into the locking groove, so that the locking piece cannot be displaced, or, The locking device is provided on the locking member, and a locking groove is provided on the wall of the chute. After the pushing tube is pushed into place, the locking device is unfolded to be inserted into the locking groove, so that the locking member cannot be displaced. The locking member also includes a weak connection, which divides the locking member into a locking portion and a screwing portion. The screwing portion is provided at the first end of the locking member; after the screwing portion is screwed, the weak connection is broken and the screwing portion falls off; The screwing portion is screwed off, and the locking portion is locked on the sliding groove by the locking device.

4. The positioning puncture needle according to claim 3, characterized in that: The locking device is an elastic member, and the locking groove is a limiting hole adapted to the diameter of the elastic member.

5. The positioning puncture needle according to claim 4, characterized in that: The elastic member is a spring and a rigid end connected to each other, one end of the spring is fixed on the slide groove, and the other end of the spring is connected to the rigid end.

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