Piercing system

Abstract

The utility model provides a kind of puncture system, the puncture system includes catheter, handle and puncture needle, the puncture needle is pipe body structure, the proximal end of the catheter is connected with the handle, the handle includes moving assembly, the moving assembly is fixedly connected with the proximal end side of the puncture needle, the distal end side of the puncture needle is arranged in the catheter, can solve the problem that the handle of puncture instrument is prone to bleeding in surgical process.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a puncture system. Background Technology

[0002] Endovascular repair of aortic diseases using covered stents can restore patency to the diseased areas of the aorta, improving blood flow and limb ischemia caused by vascular stenosis or occlusion. However, in specific lesion sites such as the aortic arch, celiac trunk, bilateral renal arteries, or superior mesenteric artery, covered stents can affect the blood supply to arterial branches. In these cases, in-situ fenestration of the covered stent is necessary during surgery to create the desired opening, and then a branch stent is delivered to this opening and connected to the covered stent. This method overcomes the dependence of treatment plans on the anatomy of the body's branch vessels, shortens surgical time, and reduces the risk of infection.

[0003] Currently, the mechanical fenestration method is used for in-situ fenestration of covered stents after implantation. This typically involves inserting a puncture instrument through the brachial / carotid artery to the junction of the branch vessel and the main vessel, physically puncturing the stent graft with a needle, and then inserting a guidewire into the stent graft through the needle lumen. After removing the puncture instrument while retaining the guidewire, a balloon is inserted along the guidewire to dilate the stent fenestration and create the desired opening. However, the handles of existing puncture instruments are prone to bleeding during the procedure. Utility Model Content

[0004] To address the issue of blood leakage from the handle of puncture instruments during surgery, this invention provides a puncture system comprising a catheter, a handle, and a puncture needle. The puncture needle has a tubular structure, with the proximal end of the catheter connected to the handle. The handle includes a moving component fixedly connected to the proximal side of the puncture needle, with the distal end of the puncture needle passing through the catheter. The moving component includes an axially extending moving tube. The handle includes an input tube and a transition tube. The input tube is fixedly located at the proximal end of the handle and communicates with the outside of the handle. The proximal end of the transition tube extends into and is fixed from the distal end of the input tube. The distal end of the transition tube extends into the moving tube from the proximal end of the moving tube. Both ends of the transition tube are radially tightly fitted to the moving tube and the input tube, respectively. The input tube, the transition tube, and the moving tube are sequentially connected. When the moving component moves axially, causing the puncture needle to move axially, the moving tube moves axially relative to the transition tube along the surface of the transition tube.

[0005] The aforementioned puncture system incorporates a transition tube within the handle. The proximal end of the transition tube extends into and is fixed within the input tube from the distal end. The distal end of the transition tube extends into the moving tube from the proximal end. Both ends of the transition tube are radially tightly fitted to the moving tube and the input tube, respectively. This interlocking arrangement of the transition tube with the input tube and the moving tube creates overlapping gaps, extending the path of fluid leakage and reducing blood leakage. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of a puncture system provided in one embodiment.

[0007] Figure 2 This is an exploded structural diagram of a puncture system provided in one embodiment.

[0008] Figure 3 This is a schematic diagram of the structure of a mobile component provided in one embodiment.

[0009] Figure 4 This is a schematic cross-sectional view of a puncture system provided in one embodiment.

[0010] Figure 5 for Figure 4 Enlarged view of section A.

[0011] Figure 6 This is a schematic cross-sectional view of the structure of a mobile component provided in one embodiment.

[0012] Figure 7 This is a partial structural schematic diagram of a puncture system provided in one embodiment.

[0013] Figure 8 This is a partial structural schematic diagram of a puncture system provided in one embodiment.

[0014] Figure 9 This is a partial structural schematic diagram of a puncture system provided in one embodiment.

[0015] Figure 10 This is a partial structural schematic diagram of a puncture system provided in one embodiment.

[0016] Figure 11 This is an exploded view of a mobile component provided in one embodiment.

[0017] Figure 12 A schematic diagram of the structure of the first outer shell portion provided in one embodiment.

[0018] Figure 13 This is a partial structural schematic diagram of a puncture system provided in one embodiment.

[0019] Figure 14 for Figure 13Enlarged view of section B. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "inner," "outer," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] It should be noted that the terms "distal" and "proximal" are used as directional terms, which are commonly used in the field of interventional medical devices. "Distal" refers to the end furthest from the operator during the procedure, while "proximal" refers to the end closest to the operator. Axial direction refers to the direction parallel to the line connecting the center of the distal and proximal ends of the medical device; radial direction refers to the direction perpendicular to the aforementioned axial direction.

[0023] See Figure 1 One embodiment provides a puncture system 100, which includes a catheter 1, a handle 2, and a puncture needle 3. The proximal end of the catheter 1 is connected to the handle 2. The puncture needle 3 is a tubular structure used for inserting a guidewire.

[0024] See Figure 2 and Figure 3 The handle 2 includes a moving component 20, which is fixedly connected to the proximal side of the puncture needle 3. The distal side of the puncture needle 3 passes through the catheter 1. The moving component 20 includes a moving tube 201 that extends axially through the needle. See also... Figure 2 , Figure 4 and Figure 5The handle 2 includes an input tube 21 and a transition tube 22. The input tube 21 is fixedly disposed at the proximal end of the handle 2 and communicates with the outside of the handle 2. The proximal end of the transition tube 22 extends into the input tube 21 from the distal end and is fixed therein. The distal end of the transition tube 22 extends into the moving tube 201 from the proximal end. Both ends of the transition tube 22 are radially tightly fitted with the moving tube 201 and the input tube 21, respectively. The input tube 21, the transition tube 22, and the moving tube 201 are sequentially connected. When the axial moving component 20 drives the puncture needle 3 to move axially, the moving tube 201 moves axially relative to the transition tube 22 along the surface of the transition tube 22. The input tube 21 is used to connect external instruments or deliver fluids, etc.

[0025] Understandably, when the distal end of the puncture system 100 is inserted into the body, blood flows into the distal end of the lumen structure of the puncture needle 3 and flows out from the proximal end of the lumen structure of the puncture needle 3. In this embodiment, a transition tube 22 is provided in the handle 2, and the proximal end of the transition tube 22 extends into and is fixed from the distal end of the input tube 21. The distal end of the transition tube 22 extends into the moving tube 201 from the proximal end of the moving tube 201, and both ends of the transition tube 22 are tightly fitted radially to the moving tube 201 and the input tube 21, respectively. This allows the transition tube 22 to be interlocked with the input tube 21 and the moving tube 201, creating overlapping gaps to extend the path of fluid leakage and reduce the leakage of blood from the proximal end of the lumen structure of the puncture needle 3 into the handle 2.

[0026] In one embodiment, see Figure 5 and Figure 6 The lumen 2010 of the movable tube 201 includes a first tube segment 2011 and a second tube segment 2012 that are axially connected to each other. The inner diameter of the first tube segment 2011 is smaller than the inner diameter of the second tube segment 2012. A first step structure 2010a is provided between the first tube segment 2011 and the second tube segment 2012. The distal end of the transition tube 22 is located in the second tube segment 2012. The inner diameter of the first tube segment 2011 is approximately the same as the outer diameter of the puncture needle 3. The puncture needle 3 is radially limited within the first tube segment 2011, so that the first tube segment 2011 can be used to radially fix the puncture needle 3.

[0027] Furthermore, when the moving tube 201 moves proximally to its closest position, the distal end of the transition tube 22 is spaced apart from the first step structure 2010a, and this gap locally forms a first gap 2012a. It is understood that regardless of where the moving tube 201 moves, the distal end of the transition tube 22 and the first step structure 2010a will not come into contact; the first gap 2012a is always present between them. This first gap 2012a can be used to collect liquid, further extending the path of liquid leakage, thereby further reducing the leakage of blood flowing from the proximal end of the lumen structure of the puncture needle 3 into the handle 2. Furthermore, the proximal end of the puncture needle 3 enters the second tube section 2012 through the first tube section 2011 and is placed inside the transition tube 22. The proximal end of the puncture needle 3 and the transition tube 22 are in close radial contact, so that the walls of the puncture needle 3, the transition tube 22 and the second tube section 2012 overlap and are in close radial contact with each other, further extending the path of liquid leakage, thereby further reducing the leakage of blood flowing from the proximal end of the lumen structure of the puncture needle 3 into the handle 2.

[0028] Furthermore, the moving tube 201 and the transition tube 22 have a first overlap length, and the transition tube 22 and the puncture needle 3 have a second overlap length. The shorter of the first overlap length and the second overlap length is greater than half of the axial length of the second tube segment. This arrangement ensures that during the operation, blood flowing from the proximal end of the lumen structure of the puncture needle 3 will not leak into the handle 2.

[0029] In one embodiment, see Figure 2 and Figure 7 The handle 2 also includes a guide tube 23. Figure 5 and Figure 6 In this embodiment, the guide tube 23 is connected to the moving tube 201. The proximal end of the puncture needle 3 is sequentially inserted into the guide tube 23 and the moving tube 201. The lumen 2010 of the moving tube 201 also includes a third tube segment 2013. The third tube segment 2013, the first tube segment 2011, and the second tube segment 2012 are sequentially axially connected. The proximal end of the guide tube 23 extends into the third tube segment 2013, and the moving tube 201 moves axially along the outer wall of the guide tube 23. In this embodiment, by providing a guide tube, the puncture needle 3 can be protected on the one hand, and the moving tube 201 can be guided on the other hand, improving the stability of the movement of the moving tube 201.

[0030] In one embodiment, the inner diameter of the third pipe segment 2013 is larger than the inner diameter of the first pipe segment 2011, and a second step structure 2010b is provided between the third pipe segment 2013 and the first pipe segment 2011.

[0031] In one embodiment, see Figure 8The handle 2 also includes a limiting component 24, which includes a rotating part 241 and a limiting part 242 connected to each other, with the limiting part 242 located at the outer peripheral edge of the rotating part 241. Figure 8 , Figure 9 and Figure 10 The rotating part 241 includes a rotation center 2410, which rotates around. The proximal end of the puncture needle 3 enters the rotating part 241 and is located within the rotating part 241, offset from the rotation center 2410. This causes the puncture needle 3 to approach the limiting part 242 in the radial direction, allowing the moving component 20 to axially abut against the limiting part 242, forming an abutment 20a. The abutment 20a is radially close to the puncture needle 3. A limiting component 24 is provided. By rotating the rotating part 241 of the limiting component 24, the limiting part 242 of the limiting component 24 axially abuts against the moving component 20, thereby limiting the axial movement distance of the puncture needle 3 and preventing the distal end of the puncture needle 3 from extending too far beyond the distal end of the catheter 1, which could damage the main stent or blood vessel. By positioning the abutment 20a closer to the puncture needle 3 in the radial direction, the abutment 20a can be subjected to force at a position closer to the puncture needle 3, which can prevent the puncture needle 3 from shifting axially and affecting the puncture effect.

[0032] Further, see Figures 7 to 10 The limiting component 24 is sleeved on the outside of the guide tube 23, making the internal structure of the handle more compact. The limiting part 242 includes a first limiting part 2421 and a second limiting part 2422 with different axial lengths arranged circumferentially. By rotating the rotating part 241, one of the first limiting part 2421 and the second limiting part 2422 axially abuts against the moving component 20. In this embodiment, the limiting part 242 also includes a third limiting part 2423, and several limiting parts with different axial lengths can be provided as needed.

[0033] In one embodiment, the limiting component 24 further includes a body portion 243, a rolling element 244, and a first elastic element 245. The body portion 243 is sleeved on the outside of the guide tube 23 and fixedly connected to the guide tube 23. The body portion 243 is disposed inside the rotating part 241 and cooperates with the rotating part 241. One of the outer surface of the body portion 243 and the inner surface of the rotating part 241 is provided with a plurality of circumferentially continuous first grooves 240a, and the other is provided with a second groove 240b. The first grooves 240a and the second grooves 240b are arranged radially opposite to each other. The first elastic element 245 is disposed in the second groove 240b, and one end of the first elastic element 245 is connected to the rolling element 244. When the rotating part 241 is rotated, the rolling element 244 can roll between two adjacent first grooves 240a. When the rotating part 241 is stopped, the first elastic element 245 fixes the rolling element 244 in the first groove 240a, so that the rotating part 241 and the body portion 243 are relatively fixed. In this embodiment, the cooperation of the rotating part 241, the main body part 243, the rolling member 244 and the first elastic member 245 provides a way to conveniently adjust the axial movement distance of the puncture needle 3, and allows the puncture needle 3 to be locked after being moved axially to a suitable distance each time, which facilitates the puncture of the puncture needle 3.

[0034] Furthermore, the outer surface of the main body 243 is circumferentially provided with a first limiting member 243a and a second limiting member 243b, and the inner surface of the rotating part 241 is circumferentially provided with a third limiting member 241a and a fourth limiting member 241b. The third limiting member 241a and the fourth limiting member 241b are both disposed between the first limiting member 243a and the second limiting member 243b. The first limiting member 243a can abut against the third limiting member 241a circumferentially, and the second limiting member 243b can abut against the fourth limiting member 241b circumferentially, thereby limiting the angle of relative rotation between the rotating part 241 and the main body 243.

[0035] See Figure 11 The moving component 20 also includes a second elastic element 202, a connector 203, and an operating element 204. A protrusion 201a is provided on the outer wall of the moving tube 201. The second elastic element 202 and the connector 203 are sequentially and radially sleeved on the protrusion 201a. The operating element 204 is sleeved on the connector 203. A first locking element 2030 is provided on the connector 203. (See reference...) Figure 12The handle 2 includes a first housing part 2a, the moving component 20 is axially slidable relative to the first housing part 2a, the first housing part 2a is axially provided with a plurality of second locking members 2a1, the connecting member 203 radially passes through the first housing part 2a, the operating member 204 is located outside the first housing part 2a, and the first locking member 2030 and the second locking member 2a1 are radially fixed to each other. The operating component 204 is used by the operator. By pressing the operating component 204 in the axial direction, the operator radially compresses the second elastic component 202 in the axial direction of the handle, thereby releasing the first locking component 2030 from one of the second locking components 2a1. Then, by sliding the operating component 204, the first locking component 2030 of the connecting component 203 moves to the other second locking component 2a1, and the second elastic component 202 expands away from the axial direction, thereby fixing the first locking component 2030 of the connecting component 203 to the other second locking component 2a1. This ensures that the puncture needle 3 can be locked after being axially moved to a suitable distance each time, facilitating the puncture of the puncture needle 3.

[0036] See Figure 13 and Figure 14 The handle also includes a second outer shell portion 2b and a third outer shell portion 2c. A first outer shell portion 2a is disposed on the second outer shell portion 2b. The second outer shell portion 2b and the third outer shell portion 2c are connected to each other. A moving component 20 is disposed within the space between the second outer shell portion 2b and the third outer shell portion 2c. A first fixing member 2b1 is disposed on the inner wall of the second outer shell portion 2b, and a second fixing member 2c1 is disposed on the inner wall of the third outer shell portion 2c. Figure 11 and Figure 14 Two sliding parts 205 are provided on both sides of the outer wall of the moving tube 201. The sliding parts 205 are radially fixed between the first fixing member 2b1 and the second fixing member 2c1. The sliding parts 205 can slide axially between the first fixing member 2b1 and the second fixing member 2c1.

[0037] The operation method of the puncture system 100 is as follows: The operator first moves the rotating part 241 to select the limiting part 242 of appropriate axial length. Then, by pressing the operating part 204 in the axial direction, the second elastic member 202 is radially compressed in the axial direction of the handle, so that the first locking member 2030 is released from fixing with one of the second locking members 2a1. Then, the operating part 204 is axially slid until the first locking member 2030 of the connecting member 203 moves to the other second locking member 2a1. The distal end 206 of the moving tube 201 abuts against the limiting part 242, and the second elastic member 202 expands in the direction away from the axis, so that the first locking member 2030 of the connecting member 203 is fixed with the other second locking member 2a1. During this process, the distal end of the puncture needle 3 extends out of the distal end of the catheter 1, completing the puncture. After the puncture is completed, the operating part 204 and the rotating part 241 are reset in sequence, and then the puncture system 100 is withdrawn from the body.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A puncture system, characterized in that, The puncture system includes a catheter, a handle, and a puncture needle. The puncture needle has a tubular structure. The proximal end of the catheter is connected to the handle. The handle includes a moving component, which is fixedly connected to the proximal side of the puncture needle. The distal end of the puncture needle passes through the catheter. The moving component includes an axially extending moving tube. The handle includes an input tube and a transition tube. The input tube is fixedly disposed at the proximal end of the handle and communicates with the outside of the handle. The proximal end of the transition tube extends into the input tube from the distal end and is fixed. The distal end of the transition tube extends into the moving tube from the proximal end. Both ends of the transition tube are radially tightly fitted to the moving tube and the input tube, respectively. The input tube, the transition tube, and the moving tube are sequentially connected. When the moving component moves axially, causing the puncture needle to move axially, the moving tube moves axially relative to the transition tube along the surface of the transition tube.

2. The puncture system as described in claim 1, characterized in that, The lumen of the movable tube includes a first tube segment and a second tube segment that are axially connected to each other. The inner diameter of the first tube segment is smaller than the inner diameter of the second tube segment. A first step structure is provided between the first tube segment and the second tube segment. The distal end of the transition tube is located in the second tube segment. The inner diameter of the first tube segment is approximately the same as the outer diameter of the puncture needle. The puncture needle is radially limited within the first tube segment.

3. The puncture system as described in claim 2, characterized in that, When the moving tube moves to the position closest to the proximal end, the distal end of the transition tube is spaced apart from the first stepped structure.

4. The puncture system as described in claim 2, characterized in that, The proximal end of the puncture needle enters the second tube section through the first tube section and is placed inside the transition tube. The proximal end of the puncture needle and the transition tube are in close radial contact.

5. The puncture system as described in claim 4, characterized in that, The moving tube and the transition tube have a first overlap length, and the transition tube and the puncture needle have a second overlap length. The shorter of the first overlap length and the second overlap length is greater than half of the axial length of the second tube segment.

6. The puncture system as described in claim 2, characterized in that, The handle also includes a guide tube, which is connected to the moving tube. The proximal end of the puncture needle is inserted into the guide tube and the moving tube in sequence. The lumen of the moving tube also includes a third tube segment. The third tube segment, the first tube segment, and the second tube segment are axially connected in sequence. The proximal end of the guide tube extends into the third tube segment. The moving tube moves axially along the outer wall of the guide tube.

7. The puncture system as described in claim 1, characterized in that, The handle further includes a limiting component, which includes a rotating part and a limiting part connected to each other. The limiting part is located at the outer peripheral edge of the rotating part. The rotating part includes a rotation center and rotates around the rotation center. The proximal end of the puncture needle passes through the rotating part and is located inside the rotating part at a position offset from the rotation center, so that the puncture needle approaches the limiting part in the radial direction, and the moving component can axially abut against the limiting part to form an abutment point, which is close to the puncture needle in the radial direction.

8. The puncture system as described in claim 7, characterized in that, The handle also includes a guide tube, which communicates with the moving tube. The proximal end of the puncture needle is inserted into the guide tube and the moving tube in sequence. The moving tube moves axially along the side wall of the guide tube. The limiting component is sleeved on the outside of the guide tube. The limiting part includes a first limiting part and a second limiting part with different axial lengths arranged circumferentially. By rotating the rotating part, one of the first limiting part and the second limiting part abuts against the moving component axially.

9. The puncture system as described in claim 8, characterized in that, The limiting component further includes a body, a rolling element, and a first elastic element. The body is sleeved on the outside of the guide tube and fixedly connected to the guide tube. The body is disposed inside the rotating part and cooperates with the rotating part. One of the outer surface of the body and the inner surface of the rotating part is provided with a plurality of circumferentially continuous first grooves, and the other is provided with a second groove. The first grooves and the second grooves are radially opposite to each other. The first elastic element is disposed in the second groove. One end of the first elastic element is connected to the rolling element. When the rotating part is rotated, the rolling element can roll between two adjacent first grooves. When the rotating part is stopped, the first elastic element fixes the rolling element in the first groove, so that the rotating part and the body are relatively fixed.

10. The puncture system as described in claim 9, characterized in that, The outer surface of the main body is circumferentially provided with a first limiting member and a second limiting member, and the inner surface of the rotating part is circumferentially provided with a third limiting member and a fourth limiting member. The third limiting member and the fourth limiting member are both disposed between the first limiting member and the second limiting member. The first limiting member can abut against the third limiting member circumferentially, and the second limiting member can abut against the fourth limiting member circumferentially.

11. The puncture system as claimed in claim 1, characterized in that, The moving component further includes a second elastic element, a connector, and an operating element. A protrusion is provided on the outer wall of the moving tube. The second elastic element and the connector are sequentially radially sleeved on the protrusion. The operating element is sleeved on the connector. A first locking element is provided on the connector. The handle includes a first outer shell. The moving component can slide axially relative to the first outer shell. A plurality of second locking elements are axially provided on the first outer shell. The connector radially passes through the first outer shell. The operating element is located outside the first outer shell. The first locking element and the second locking elements can be radially fixed to each other.

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