Positioning puncture needle

Abstract

The invention provides a positioning puncture needle. The positioning puncture needle comprises a puncture handle, a puncture needle body arranged on the puncture handle, a pushing handle, a pushing pipe arranged on the pushing handle and a locking fastener. The pushing tube penetrates through the puncture handle and is arranged in the puncture needle, the first end of the locking fastener is matched with the pushing handle to form a clamping structure for limiting the locking fastener to move towards the opposite direction of the puncture needle, and the locking device locks the position of the locking fastener after the pushing tube is pushed in place, so that the locking fastener cannot move. By arranging the locking device, the lock catch piece is fixed to the position where the pushing pipe is pushed in place, and the accuracy of puncture positioning is improved. The problem that the locking fastener is difficult to take out due to the fact that the pushing pipe retracts under the action of external force is solved, and the stability and the safety of an 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] The lung nodules of early lung cancer, precancerous lesions or suspected early lung cancer are often small in size and deep in the lesions, which are sometimes difficult to locate during thoracoscopic surgery. The use of a positioning puncture needle under CT guidance is the current mainstream method of locating lung nodules, 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, the 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 in a bent state at the end of the flexible positioning rope. When in use, the push tube and the anchor hook are sent 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 the patent, it is also necessary to remove the locking piece that plays a limiting role, withdraw the push tube, and then take out the puncture needle, leaving the positioning line and anchor hook at the lesion position for marking. In practice, it is found that after the puncture needle is pushed, the needle tip at its distal end will push into the inside of the lung tissue. The push handle is connected to the push tube, and the push handle is pressed to push the anchor hook in the push tube out and release it. After it is released in place, 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 reversed, and the reversed anchor hook acts on the push tube so that the push handle moves in the opposite direction of the puncture. Due to the restriction of the locking structure 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 performed. Therefore, this application further improves the patent CN219940749U in view of the above technical problems. On the one hand, a design for the problem of push tube withdrawal after the anchor hook is released is added, and on the other hand, a positioning needle that is easy to remove the locking piece is provided. Summary of the invention

[0003] The present application provides a positioning puncture needle, which fixes the locking piece at 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, resulting in difficulty in removing 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 of the puncture needle, and also includes a locking device, after the pushing tube is pushed into place, the locking device locks the position of the locking piece, 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 arranged 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 unfolded 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 unfolded 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 slot, 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] Furthermore, according to the positioning puncture needle as described above, the locking piece also includes a weak connection, which divides the locking piece into a locking part and a screwing part, and the screwing part is arranged at the first end of the locking piece; after the screwing part is screwed, the weak connection breaks and the screwing part falls off; the locking part is provided with the locking device as described above, and the screwing part falls off after being screwed, and the locking part is locked on the slide groove.

[0012] 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 of the puncture needle, 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; and also includes a pop-up device, the pop-up device is arranged on the puncture handle, the pop-up device is arranged on the slide groove wall, and after the push tube is pushed into place, the pop-up device pops out the locking piece in the radial direction.

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

[0014] 1. This application fixes the lock piece at the position after the push tube is pushed into place by setting a locking device, thereby fixing the relative position of the push handle and the puncture handle, on the one hand, ensuring the complete release of the anchor hook at the lesion position and improving the accuracy of puncture positioning. On the other hand, it avoids the problem of difficulty in removing the lock piece caused by the push tube being withdrawn under the action of external force during the release process, thereby improving the stability and safety of the operation.

[0015] 2. The present application sets straight-through slide grooves or weak connections for different locking devices, which can more conveniently remove the locking device for subsequent withdrawal operations while ensuring complete release, and reduce the effect of the removal action on the positioning puncture needle to avoid affecting the position of the anchored positioning line. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0017] Figure 1 Shown is a three-dimensional structural diagram of a positioning puncture needle according to an embodiment of the present application.

[0018] Figure 2 Shown Figure 1 An exploded view of the three-dimensional structure of the positioning puncture needle of the illustrated 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 yet 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] Fig. 9 Shown Figure 8 A three-dimensional structural diagram of a locking member for positioning a puncture needle in the illustrated embodiment.

[0026] Figure numerals: puncture handle 10, puncture needle 11, push handle 12, push 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, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0028] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "including" or "comprising" and the like used in this application specification and claims mean that the elements or objects appearing before "including" or "comprising" include the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" 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. The singular forms of "a", "an" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more 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] For 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 of the puncture needle, and also includes a locking device, after the pushing tube is pushed into place, the locking device locks the position of the locking piece, so that the locking piece cannot be displaced.

[0033] Embodiment 1:

[0034] Combination Figure 1 to Figure 2As shown, the puncture positioning needle of the present invention includes a puncture handle 10, a puncture needle 11 on the puncture handle 10, a push handle 12, a push tube 13 on the push handle 12, a locking member 14, and a barb 16 arranged at the second end 142 of the locking member 14. The push tube 13 is detachably sleeved in the puncture needle 11, and a positioning line is provided in the push tube 13. The first end 141 of the locking member 14 can be locked to the push handle 12 and move in the puncture direction with the push handle 12. The puncture handle 10 is provided with a limiting slide groove 17, and the locking member 14 is partially placed in the slide groove 17 and can move relatively. The barb 16 is arranged at the second end 142 of the locking member 14, and is located at the contact surface between the locking member 14 and the slide groove 17. After controlling the puncture handle 10 to insert the puncture positioning needle into the lesion, the pushing handle 12 is controlled to push the pushing tube 13 in the puncture direction until the pushing handle 12 abuts against the puncture handle 10, which can be regarded as being pushed into place. When the pushing tube 13 is not pushed forward, the second end 142 of the locking member 14 is located at the proximal end of the slide groove 17, and the barb 16 arranged at the second end 142 is contracted under the squeezing of the groove of the limiting slide groove 17. As the pushing action slides toward the distal end of the slide groove 17, when the pushing handle 12 abuts against the puncture handle 10, the second end 142 of the locking member 14 slides out of the limiting slide groove 17, and the barb 16 at the second end 142 expands and supports the puncture handle 10, so that the locking member 14 cannot move in the opposite direction of the puncture direction. Due to the abutment between the puncture handle 10 and the push handle 12, the push tube 13 can no longer move in the puncture direction. In this way, the locking member 14 and the barb 16 located at the second end 142 of the locking member 14 fix the relative positions of the puncture needle 11 and the push tube 13, lock the position of the push tube 13 so that it cannot move, improve the accuracy of positioning, and avoid operational errors during surgery or withdrawal problems caused by lung tissue rebound.

[0035] Combination Figure 3 As shown, in some embodiments, the barbs 16 are disposed on one or more sides of the second end 142 of the locking member 14 .

[0036] Embodiment 2:

[0037] like Figure 4 As shown, compared with the first embodiment, the difference of this embodiment is that the barb 16 is not used, but an elastic member 19 fixed on the slide groove 17 is provided. The elastic 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 part, etc. When the spring is in a natural state, the rigid end can extend out of the groove plane of the slide groove 17.

[0038] A limiting hole 20 is provided at a corresponding position of the locking member 14. When the pushing tube 13 is not pushed forward, the spring 19 is squeezed by the locking member 14 in the slide groove 17 section and is in a compressed state. As the locking member 14 slides on the slide groove 17, the limiting hole 20 on the locking member 14 approaches the compressed elastic member 19. When the pushing handle 12 abuts against the puncture handle 10, the orifice of the limiting hole 20 is aligned with the rigid end of the elastic member 19, the spring is not compressed and returns to a natural state, and the rigid end enters the limiting hole 20 with the movement of the spring to lock 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 limiting hole 20 is provided on the slide groove 17. When the push tube 13 is not pushed in, the spring 19 on the locking member 14 is on the slide groove 17, and the spring 19 is compressed by the slide groove 17. After the push tube 13 is pushed in place, the spring 19 enters the limiting hole 20 to lock the relative position of the locking member 14 and the puncture handle 10 without moving.

[0040] Embodiment three:

[0041] like Figure 5 As shown, in the new embodiment, an elastic member 19 fixed on the slide groove 17 is provided, but a limiting hole 20 is not provided, and a boss 25 is provided at the second end 141 of the lock member 14, and the boss 25 is used to limit the lock member 14 from moving on the slide groove 17, that is, when the boss 25 slides on the slide groove 17, the lock member 14 cannot be removed due to the limitation of the channel of the slide groove 17. When the push handle 12 abuts the puncture handle 10, the boss 25 moves out of the slide groove 17, the lock member 14 is no longer limited by the channel, the pressure on the spring is reduced, and it recovers from the compressed state to the natural state, and the rigid end pops out to pop out the lock member 14 from the radial direction, thereby achieving the purpose of removing the lock member 14.

[0042] Embodiment 4:

[0043] like Figure 6 to Figure 7As shown, compared with the second embodiment, the lock member 14 of this embodiment is provided with a weak connection 22, which is a relatively fragile and easy-to-break part in terms of material and thickness. The weak connection 22 divides the lock member 14 into a locking portion 23 and a screwing portion 24, and the weak connection 22 is arranged between the locking device and the first end 141. The screwing portion 24 is arranged at the first end 141 of the lock member 14; after the screwing portion 24 is screwed, the weak connection 22 breaks and the screwing portion 24 falls off. Since the first end 141 of the lock member 14 locks the push handle 12, after the screwing portion 24 falls off, the push handle 12 is no longer constrained by the lock member 14 and can move relative to the push handle 12. Due to the effect of the locking device, the locking portion 23 is still fixed on 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 five:

[0045] like Figures 8 to 9 As shown, compared with the first embodiment, this embodiment further includes a straight-through groove 21. The straight-through groove 21 is integrally arranged 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 groove of the straight-through groove 21 is connected to the locking member 14 (such as the locking member 14) with the barbs 16 in the expanded state. Figure 8 The locking member 14 with the barbs 16 in the unfolded state can slide relatively on the straight channel 21. After the barbs 16 are unfolded, the locking member 14 locks the relative positions of the push handle 12 and the connecting handle. At this time, the anchor hook has been completely released and the positioning is successfully achieved. In the next stage, the push tube 13 needs to be withdrawn first, and then the puncture needle 11 is withdrawn to leave the positioning line in the positioning position. The first end 141 of the locking member 14 is lifted off the push handle 12, and the barbs 16 of the second end 142 are aligned with the notch of the straight channel 21, and the locking member 14 is slid out and removed along the channel of the straight channel 21, so that the push handle 12 and the puncture handle 10 can move relative to each other, and the puncture handle 10 can be taken out. Such a setting can not only ensure the operational stability of pushing in place and releasing the anchor hook, but also can take out the locking member 14 and withdraw the push tube 13 after the release is successful.

[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. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be 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 precise structures that have been 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 arranged on the puncture handle, a push handle, a push tube arranged 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 push handle to form a locking structure that limits the displacement of the locking member in the opposite direction of the puncture needle, characterized in that: It 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.

2. The positioning puncture needle according to claim 1, characterized in that: The locking device is a barb arranged at the second end of the locking piece. 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 to lock the position of the locking piece, so that the locking piece cannot produce displacement in the opposite direction of the puncture needle.

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

4. The positioning puncture needle according to claim 1, characterized in that: 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 member in the puncture direction; The locking device is arranged on the wall of the slide groove, and the locking member is provided with a locking groove. 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, or, The locking device is arranged on the locking piece, and a locking groove is arranged on the sliding groove wall. 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.

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

6. The positioning puncture needle according to claim 5, 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 slot, and the other end of the spring is connected to the rigid end.

7. The positioning puncture needle according to claim 1, comprising a puncture handle, a puncture needle arranged on the puncture handle, a push handle, a push tube arranged 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 push handle to form a locking structure that limits the displacement of the locking member in the opposite direction of the puncture needle. The puncture handle is provided with a slide groove, which is used to cooperate with the movement of the locking member in the puncture direction; it is characterized in that It also includes a pop-up device, which is arranged on the puncture handle. The pop-up device is arranged on the wall of the slide groove, and after the pushing tube is pushed into place, the pop-up device pops out the locking member in a radial direction.

8. The positioning puncture needle according to claim 2, characterized in that: 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 channel of the straight-through slide is adapted to the locking member with the barbs in the expanded state, and the locking member with the barbs in the expanded state can slide relatively on the straight-through slide.

9. The positioning puncture needle according to any one of claims 4 to 6, characterized in that: The locking member also includes a weak connection, and the weak connection divides the locking member into a locking portion and a screwing portion. The screwing part is arranged at the first end of the locking member; after the screwing part is screwed, the weak connection is broken and the screwing part falls off; The locking portion is provided with a locking device as described in any one of claims 4 to 6, and the screwing portion falls off after being screwed, and the locking portion is locked on the sliding groove.

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