Kidney fistulization suturing instrument

Abstract

The utility model relates to a nephrostomy suturing instrument which comprises a suturing instrument body and is provided with an insertion portion capable of being inserted into a fistula, the insertion portion is connected with at least two supporting seats, the supporting seats can be contained in the suturing instrument body and horizontally unfolded outwards, sutures are arranged in the insertion portion, and connectors at the two ends of each suture are connected with the supporting seats on the two sides in a clamped mode respectively. An inserting needle is arranged in the stitching instrument main body, a needle head of the inserting needle can be clamped with a joint of a suture, and the end part of the suture is brought out from an orificium fistulae; the insertion part is provided with a through hole through which the end part of the suture passes, and a cutting part is arranged in the stitching instrument main body so as to cut off the suture from the through hole. According to the utility model, the direct suture of the nephrostomy after the percutaneous nephrolithotripsy is realized, and the problem that the suture is difficult because the kidney is deep and far away from the body surface in the traditional method is solved; through cooperation of the cutting component and the through hole, the operation process is simplified, the tedious step of manually cutting off the suture in a traditional method is avoided, the length of the suture can be increased through the through hole, and the suture is assisted in knotting.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a nephrostomy suture device. Background Technology

[0002] Percutaneous nephrolithotomy (PCNL) is a minimally invasive surgical technique that involves creating a channel from the skin to the kidney in the lower back, inserting a nephroscope into the renal pelvis and calyces, and using lithotripsy tools such as lasers and ultrasound to break up and remove upper urinary tract stones. Common risks of PCNL include puncture of a major blood vessel during the procedure, leading to massive intraoperative and postoperative bleeding, requiring blood transfusions, interventional hemostasis, and open hemostasis.

[0003] Currently, most patients require the placement of a nephrostomy tube during surgery to facilitate postoperative observation and management of potential bleeding. However, the placement of a nephrostomy tube not only increases the patient's postoperative recovery time but also introduces additional nursing care, thereby prolonging hospital stays and increasing hospitalization costs.

[0004] Furthermore, the most direct and effective method for stopping bleeding is suturing. However, because the kidneys are located deep within the body, far from the surface, and because nephrostomy openings are typically large diameters (F16-F22), traditional needle and suture methods are difficult to apply directly to such deep, large wounds. Doctors usually have to rely on leaving a nephrostomy tube in place to observe and manage potential bleeding, which increases the burden on patients and medical costs. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a nephrostomy suture device in view of the above-mentioned defects of the prior art.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A nephrostomy suture device is constructed, comprising a suture body and an insertion part for inserting into the fistula opening. The insertion part is connected to at least two support seats, both of which can be housed inside the suture body and can be horizontally extended outward. A suture is provided inside the insertion part, with the two ends of the suture engaging with the support seats on both sides respectively. A needle is provided inside the suture body, the needle tip of which can engage with the suture end and bring the suture end out of the fistula opening. The insertion part has a through hole for the suture end to pass through, and a cutting component is provided inside the suture body to cut the suture through the through hole.

[0008] As an improvement to the nephrostomy suture device, the cutting component includes a blade and a driver connected to the blade, the driver being able to drive the blade to move toward the through-hole to cut the suture passing through the through-hole.

[0009] As an improvement to the nephrostomy suture device, the actuator includes a push rod slidably connected to the suture device body. One end of the push rod is used to mount the blade, and the other end protrudes outward for user use. An elastic element is provided between the push rod and the suture device body.

[0010] As an improvement to the nephrostomy suture device, the suture body is provided with a conduit along the axial direction for a guide wire to pass through the suture body for guidance.

[0011] As an improvement to the nephrostomy suture device, it further includes a pressing handle and a first reset member. The pressing handle is slidably disposed on the suture device body and connected to the two side inserts to control the drive of the inserts to extend from the suture device body to engage with the connector and to retract. A first reset member is disposed between the pressing handle and the suture device body.

[0012] As an improvement to the nephrostomy suture device, the suture device body includes a tube and a drive assembly for controlling the support seat to be housed in the tube and to unfold horizontally outward, wherein the insertion needle and the cutting component are both located in the tube.

[0013] As an improvement to the nephrostomy suture device, the drive assembly includes a torsion spring disposed between the support base and the tube body. Each support base is connected to a pull rope, and a control rod is connected between the ends of the pull ropes. The pull ropes can slide along the axial direction of the tube body. A second reset member is disposed between the control rod and the tube body. By pulling the pull ropes with the control rod, the support base can be rotated and unfolded outward.

[0014] As an improvement to the nephrostomy suture device, the tube body has a needle outlet hole. When the support is in the unfolded state, the needle outlet hole can guide the insertion needle toward the outer end of the support, so that the needle tip of the insertion needle can engage with the suture joint.

[0015] As an improvement to the nephrostomy suture device, the tube body has a movable groove, and the control rod has a movable key protruding outward from the movable groove. By pushing the movable key along the movable groove, the support can be adjusted to the unfolded state and the retracted state.

[0016] As an improvement to the nephrostomy suture device, the movable key is rotatably connected to the control rod, and the movable groove includes a first groove portion arranged along the axial direction of the tube body, and a second groove portion and a third groove portion respectively connected to both ends of the first groove portion. The second groove portion and the third groove portion are both arranged along the radial direction of the tube body to lock the support seat when it is adjusted to the unfolded state and the retracted state.

[0017] The beneficial effects of this invention are as follows: The suture body is inserted into the fistula via the insertion part. Two support seats extend horizontally outward from the inside of the suture body, abutting against the inner walls on opposite sides of the fistula, providing stable support for subsequent suture operations. Sutures are pre-installed in the insertion part. The needle inside the suture body is controlled to penetrate the skin and insert into the fistula, engaging the needle tip with the suture joint. The needle is then removed, and the two ends of the suture are also brought out through the skin from the fistula, forming a suture structure. After the suture is brought out, a knot is tied, completing the fistula suturing. This allows the needle to penetrate thicker skin into the fistula, and the suture joints are brought out along their original path through the skin, completing the suture threading process. It can be applied to deep, large wounds without the need for a nephrostomy tube.

[0018] Furthermore, during the knotting process, one end of the thread can be passed through the through-hole in the insertion part to extend the thread length and facilitate knotting. After knotting, both ends of the excess thread are passed through the through-hole, and the cutting component inside the sewing machine is controlled to cut the thread through the through-hole, completing the thread trimming. This simplifies the operation process, avoids the tedious step of manually cutting the thread in traditional methods, and improves work efficiency; at the same time, users can also extend the thread length through the through-hole to assist in knotting. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is one of the three-dimensional structural diagrams of the support base of this utility model in an unfolded state;

[0021] Figure 2 This is an enlarged view of point A of this utility model;

[0022] Figure 3 This is a cross-sectional view of the support base of this utility model in its unfolded state;

[0023] Figure 4 This is a utility model Figure 3 Enlarged view of point B in the image;

[0024] Figure 5 This is a utility model Figure 3 Enlarged view of point C in the image;

[0025] Figure 6 This is the second three-dimensional structural diagram of the support base of this utility model in an unfolded state;

[0026] Figure 7 This is a cross-sectional view of the support base of this utility model in its stored state;

[0027] Figure 8 This is a utility model Figure 7 Enlarged view of point D in the image;

[0028] Figure 9 This is a three-dimensional structural schematic diagram of the cutting component of this utility model;

[0029] Figure 10 This is a partial three-dimensional structural schematic diagram of the present invention;

[0030] Figure 11 This is a three-dimensional structural diagram of the drive component of this utility model;

[0031] Figure 12 This is a schematic diagram of the connector and needle snap-fit ​​structure of this utility model.

[0032] In the diagram: 1. Main body of the suture device; 11. Insertion part; 12. Through hole; 13. Tube body; 131. Movable groove; 132. First groove; 133. Second groove; 134. Third groove; 135. Needle outlet; 14. Drive assembly; 141. Pull cord; 142. Control lever; 143. Second reset component; 144. Movable key; 15. Guide tube; 2. Support base; 3. Suture; 31. Connector; 311. Snap-fit ​​part; 4. Insert needle; 41. Needle tip; 5. Cutting component; 51. Blade; 52. Driver; 521. Push rod; 522. Elastic component; 6. Press handle; 7. First reset component. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, a nephrostomy fistula suture device includes a suture device body 1 and an insertion part 11 for inserting into the fistula. The insertion part 11 is connected to two support seats 2, both of which can be housed inside the suture device body 1 and can be horizontally extended outward. A suture 3 is provided inside the insertion part 11, and the two ends of the suture 3 are respectively engaged with the two support seats 2. A needle 4 is provided inside the suture device body 1, and the needle tip 41 of the needle 4 can be engaged with the end of the suture 3 and bring the end of the suture 3 out from the fistula. The insertion part 11 has a through hole 12 for the end of the suture 3 to pass through. A cutting component 5 is provided inside the suture device body 1 to cut the suture 3 through the through hole 12.

[0035] Specifically, two support seats 2 are symmetrically arranged, and the insertion part 11 is the lower end of the suture body 1. When suturing a patient's fistula, firstly, the suture body 1 is inserted into the fistula through the insertion part 11. Then, the two support seats 2 are controlled to expand horizontally outward from inside the suture body 1, abutting against the inner walls on opposite sides of the fistula, providing stable support for subsequent suture 3 operations. Suture 3 is pre-installed in the insertion part 11, and the connectors 31 at both ends of the suture 3 are respectively engaged with the support seats 2 on both sides. At this time, the needle 4 inside the suture body 1 is controlled to pass through the skin and insert into the fistula, and the needle tip 41 of the needle 4 is engaged with the connector 31 of the suture 3. Then, the needle 4 is removed, and the two ends of the suture 3 are also brought out from the fistula through the skin, forming a suture structure. After the suture 3 is brought out, the user can tighten it and tie a knot. During the knotting process, one end of the suture 3 can be passed through the through hole 12 in the insertion part 11 to extend the length of the suture 3 and make knotting easier. After knotting, both ends of the excess suture 3 are passed through the through hole 12, and the cutting component 5 inside the main body 1 of the suture device is controlled to cut the suture 3 through the through hole 12, completing the fistula suturing. This allows the insertion needle 4 to pass through thicker skin into the fistula, and the connectors 31 at both ends of the suture 3 to be pushed through the skin along the original path and brought out, completing the suture threading process. This can be applied to deep, large-sized wounds without the need for a nephrostomy tube.

[0036] This method enables direct suturing of the nephrostomy site after percutaneous nephrolithotomy, avoiding the difficulties in suturing the kidney due to its deep location and distance from the body surface, a problem inherent in traditional methods. Furthermore, during suturing, the unfolding of the support base 2 provides stable support for the suture 3, ensuring its precision and strength, thus improving the suturing effect. The locking structure between the insert needle 4 and the suture 3 simplifies the suture handling process, allowing users to more easily pull out and knot the suture 3. The cooperation between the cutting component 5 and the through hole 12 simplifies the operation process, avoiding the cumbersome step of manually cutting the suture 3 required in traditional methods, thus improving work efficiency. Simultaneously, users can extend the length of the suture 3 through the through hole 12 to assist in knotting the suture 3.

[0037] In some embodiments of this application, such as Figure 7 , Figure 8 and Figure 9 As shown, the cutting component 5 includes a blade 51 and a driver 52 connected to the blade 51. The driver 52 drives the blade 51 to move towards the through-hole 12 to cut the suture 3 passing through the through-hole 12. Specifically, based on the driving action of the driver 52 on the blade 51, when it is necessary to cut the suture 3 passing through the through-hole 12, the driver 52 starts to operate, generating driving force to push the blade 51 to move along the through-hole 12. During the movement, the sharp edge of the blade 51 contacts the suture 3 and cuts it through the cutting action. Because the blade 51 is stably connected to the driver 52, the accuracy and stability of the cutting process can be ensured. This simplifies the cumbersome steps of manually cutting the suture 3 in traditional methods, making the surgical process smoother.

[0038] Furthermore, the suture 3 is foldable. When the support seat 2 is located inside the suture body 1 and is in a contracted state, the suture 3 is placed inside the suture body 1 by folding so that it can enter the fistula through the insertion part 11 of the suture body 1.

[0039] In some embodiments of this application, the actuator 52 includes a push rod 521 slidably connected to the suture body 1. One end of the push rod 521 is used to mount the blade 51, and the other end protrudes outward for user use. An elastic element 522 is provided between the push rod 521 and the suture body 1. Specifically, the elastic element 522 is a spring; the push rod 521 is slidably connected to the suture body 1, and the push rod 521 can move linearly relative to the suture body 1 within a certain range. One end of the push rod 521 is used to mount the blade 51, and the other end protrudes outward for user use. The user can control the movement of the push rod 521 by pushing or pulling this protruding end. When the push rod 521 is subjected to an external force (such as being pushed by the user), the elastic element 522 is compressed, storing elastic potential energy. When the external force is removed, the elastic element 522 releases the stored elastic potential energy, causing the push rod 521 to return to its initial position.

[0040] The user pushes the push rod 521 with its outward-protruding end. The push rod 521 moves the blade 51 to cut excess suture 3. During this process, the elastic element 522 is compressed or stretched, storing elastic potential energy. After cutting, the user removes the external force, and the elastic element 522 releases the stored elastic potential energy, pushing the push rod 521 and the blade 51 back to their initial positions, ready for the next use. The outward-protruding push rod 521 design allows the user to easily control the movement of the blade 51 without direct contact, improving operational safety and convenience. The elastic element 522 also allows the push rod 521 to automatically reset after completing its work, eliminating the need for manual operation and improving work efficiency.

[0041] In some embodiments of this application, the suture body 1 is provided with a conduit 15 along its axial direction for guiding a guidewire through the suture body 1. Specifically, the conduit 15 extends axially through the entire suture body 1, providing a channel from one end to the other. The guidewire can pass through the conduit 15 to guide the suture during the procedure. Once the guidewire is precisely placed at the target location within the fistula after passing through the conduit 15, it helps the surgeon to position the suture body 1.

[0042] By guiding the suture device through the catheter 15 with a guidewire, it can be ensured that the suture device is precisely placed at the fistula site that needs to be sutured during the operation. This makes it more convenient for doctors to perform the suturing operation, reduces the errors that may be caused by manual positioning, and ensures the accuracy and consistency of the suturing.

[0043] In some embodiments of this application, such as Figure 10 As shown, it also includes a pressing handle 6 and a first reset member 7. The pressing handle 6 is slidably disposed on the suture body 1 and connected to the two side needles 4 to control the extension of the driving needles 4 from the suture body 1 to engage with the connector 31 and to retract them; the first reset member 7 is disposed between the pressing handle 6 and the suture body 1. Specifically, the pressing handle 6 is slidably disposed on the suture body 1 and connected to the two side needles 31. The user presses the pressing handle 6 to control the needles 31 to extend from the suture body 1 to engage with the connector 31 of the suture 3. At this time, the first reset member 7 is squeezed and deformed; when the user releases the pressing handle 6, the rebound force of the first reset member 7 will push the pressing handle 6 back to the initial position, thereby causing the needles 31 to retract and reset, so that the two ends of the suture 3 pass through the skin from the fistula and are brought out.

[0044] In some embodiments of this application, the driver 52 is an electric actuator 521 or a linear motor.

[0045] In some embodiments of this application, the suture body 1 includes a tube 13 and a drive assembly 14 for controlling the support base 2 to be retracted into the tube 13 and horizontally extended outward. The needle 4 and the cutting component 5 are both located within the tube 13. Specifically, the tube 13, as the main part of the suture body 1, provides support and protection for other components; the drive assembly 14 is used to control the retraction and extension of the support base 2. When the drive assembly 14 is activated, it drives the support base 2 to be retracted within the tube 13 or horizontally extended outward. Before using the suture, the support base 2 is in a retracted state, and the needle 4 and the cutting component 5 are also located within the tube 13. When suturing is required, the drive assembly 14 is activated, causing the support seat 2 to unfold horizontally outward, so that it contacts the inner wall next to the fistula and provides support and fixation. At the same time, the insertion needle 4 extends out from the tube body 13 and penetrates the tissue to engage with the connectors 31 at both ends of the suture 3, and then retracts along the original path to bring the connectors 31 out of the fistula. The drive assembly 14 is activated again, causing the support seat 2 to be retracted into the tube body 13. Then, the two ends of the pulled-out suture 3 are tied. After tying, the cutting component 5 removes the excess suture 3 to ensure clean closure of the wound.

[0046] In some embodiments of this application, such as Figure 11 As shown, the drive assembly 14 includes a torsion spring disposed between the support base 2 and the tube body 13. Each support base 2 is connected to a pull rope 141. A control rod 142 is connected between the ends of the pull rope 141 and can slide along the axial direction of the tube body 13. A second reset member 143 is disposed between the control rod 142 and the tube body 13. By pulling the pull rope 141 through the control rod 142, the support base 2 can be rotated and unfolded outward. Specifically, the second reset element 143 is a spring. In the initial state, the support seat 2 remains in a retracted state under the action of the torsion spring. When it is necessary to unfold the support seat 2, the doctor slides the control rod 142 along the axial direction of the tube 13, pulling the pull rope 141. The tension of the pull rope 141 overcomes the elastic force of the torsion spring, causing the support seat 2 to begin to rotate and unfold horizontally outward. When the support seat 2 is unfolded to the desired position, the doctor stops sliding the control rod 142, and the support seat 2 remains in the unfolded state. When it is necessary to retract the support seat 2, the doctor slides the control rod 142 again, releasing the tension of the pull rope 141. Under the action of the elastic force of the torsion spring, the support seat 2 begins to rotate and retract into the tube 13. At the same time, the second reset element 143 provides elastic force for the reset of the control rod 142, causing the control rod 142 to return to its initial position. The unfolding and retraction of the support seat 2 can be controlled by sliding the control rod 142, eliminating the need for complex manual operation and simplifying the surgical procedure. The design of the torsion spring and pull cord 141 makes the drive assembly 14 compact and does not take up too much space, which is conducive to the miniaturization and portability of the suture device.

[0047] It should be noted that the insertion part 11 is the lower end of the tube body 13, and the diameter of the insertion part 11 is 16mm-22mm, because the diameter of a normal fistula is also 15mm-22mm, which allows for better insertion into the fistula.

[0048] In some embodiments of this application, the tube 13 has a needle outlet 135. When the support 2 is in the unfolded state, the needle outlet 135 can guide the needle 4 towards the outer end of the support 2, so that the needle tip 41 of the needle 4 can engage with the connector 31 of the suture 3. Specifically, the tube 13 has a needle outlet 135, allowing the needle 4 to move along a specific path. When the support 2 is in the unfolded state, the needle outlet 135 can guide the needle 4 towards the outer end of the support 2, ensuring that the needle 4 can move along a predetermined path. Under the guidance, the needle 4 moves to the outer end of the support 2, and its needle tip 41 engages with the connector 31 of the suture 3. Since the movement trajectory and engagement position of the needle 4 are preset, the consistency and accuracy of each sew can be ensured, thereby improving the sewing quality.

[0049] Furthermore, such as Figure 12 As shown, the connector 31 has a slot for inserting the needle 41; an annular engaging portion 311 is provided in the slot; the needle 41 has an annular groove on its outer surface that mates with the engaging portion 311. Because the engaging portion 311 has a certain elastic force, after the needle 41 is inserted into the slot, the engaging portion 311 will engage with the annular groove to achieve a locking and fixing between the needle 41 and the connector 31.

[0050] In some embodiments of this application, the tube body 13 has a movable groove 131, and the control lever 142 has a movable key 144 protruding outward from the movable groove 131. By pushing the movable key along the movable groove 131, the support base 2 can be adjusted to an unfolded state and a retracted state. Specifically, the tube body 13 has a movable groove 131, which provides a channel for the movable key 144 to move within it. The shape and size of the movable groove 131 determine the movement trajectory and range of the movable key. When the user pushes the movable key 144, the movable key 144 moves along the movable groove 131, and the movement of the movable key causes the control lever 142 to move together. Since the movable key 144 on the control lever 142 cooperates with the movable groove 131, the movable key 144 slides along the edge of the movable groove 131, ensuring the stable movement of the control lever 142. The movement of the control lever 142 then causes the support base 2 to switch between the unfolded state and the retracted state. The arrangement of the movable slot 131 and the movable key 144 ensures the stability of the control lever 142 and the support base 2 during movement, preventing wobbling or deviation.

[0051] In some embodiments of this application, the movable key 144 is rotatably connected to the control rod 142, and the movable groove 131 includes a first groove 132 arranged along the axial direction of the tube body 13, and a second groove 133 and a third groove 134 respectively connected to both ends of the first groove 132. The second groove 133 and the third groove 134 are both arranged radially along the tube body 13 to lock the support seat 2 when it is adjusted to the unfolded state and the retracted state.

[0052] Specifically, the second groove 133 is located above the third groove 134. When the support base 2 is adjusted to the unfolded state, the movable key 144 slides through the first groove 132 to align with the second groove 133. Then, the movable key 144 is rotated into the second groove 133 to restrict the movement of the control lever 142, thus locking it and maintaining the stability of the support base 2. When the support base 2 needs to be adjusted to the retracted state, the movable key 144 is first rotated to the first groove 132, and the control lever 142 is pushed along the first groove 132 until the movable key 144 is aligned with the third groove 134. At this time, the movement of the control lever 142 no longer pulls the support base 2, and the support base 2 is reset and retracted into the tube body 13. The movable key 144 is then rotated into the third groove 134 to restrict the movement of the control lever 142 again. With the radial arrangement of the second groove 133 and the third groove 134, the movable groove 131 can effectively lock the support base 2, ensuring the stability of the support base 2 whether it is in the unfolded state or the stored state, and preventing shaking or displacement during use.

[0053] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A nephrostomy suture device, characterized in that, The device includes a suture body and an insertion portion for inserting into a fistula. The insertion portion is connected to at least two support seats, both of which can be housed inside the suture body and can be horizontally extended outwards. A suture is provided inside the insertion portion, with the two ends of the suture engaging with the support seats on both sides. A needle is provided inside the suture body, with the needle tip engaging with the suture end and pulling the suture end out of the fistula. The insertion portion has a through hole for the suture end to pass through, and a cutting component is provided inside the suture body to cut the suture through the through hole.

2. The nephrostomy suture device according to claim 1, characterized in that, The cutting component includes a blade and a driver connected to the blade, the driver being able to drive the blade to move toward the through hole to cut the suture passing through the through hole.

3. The nephrostomy suture device according to claim 2, characterized in that, The actuator includes a push rod slidably connected to the stapler body. One end of the push rod is used to mount the blade, and the other end protrudes outward for user use. An elastic element is provided between the push rod and the stapler body.

4. The nephrostomy suture device according to claim 1, characterized in that, The suture body is provided with a conduit along the axial direction for the guide wire to pass through the suture body for guidance.

5. The nephrostomy suture device according to claim 1, characterized in that, It also includes a pressing handle and a first reset component. The pressing handle is slidably disposed on the suture body and connected to the two side inserts to control the drive of the inserts to extend out of the suture body to engage with the connector and to retract. The first reset component is disposed between the pressing handle and the suture body.

6. The nephrostomy suture device according to any one of claims 1-5, characterized in that, The main body of the suture device includes a tube and a drive assembly for controlling the support seat to be housed in the tube and to unfold horizontally outward. The needle and the cutting component are both located in the tube.

7. The nephrostomy suture device according to claim 6, characterized in that, The drive assembly includes a torsion spring disposed between the support base and the tube body. Each support base is connected to a pull rope, and a control rod is connected between the ends of the pull ropes. The control rod can slide along the axial direction of the tube body. A second reset member is disposed between the control rod and the tube body. By pulling the pull ropes with the control rod, the support base can be rotated and unfolded outward.

8. The nephrostomy suture device according to claim 6, characterized in that, The tube has a needle outlet hole. When the support is in the unfolded state, the needle outlet hole can guide the needle towards the outer end of the support so that the needle tip of the needle can engage with the joint of the suture.

9. The nephrostomy suture device according to claim 7, characterized in that, The tube body has a movable groove, and the control rod has a movable key protruding outward from the movable groove. By pushing the movable key along the movable groove, the support can be adjusted to the unfolded state and the retracted state.

10. The nephrostomy suture device according to claim 9, characterized in that, The movable key is rotatably connected to the control lever. The movable groove includes a first groove portion arranged along the axial direction of the tube body, and a second groove portion and a third groove portion respectively connected to both ends of the first groove portion. The second groove portion and the third groove portion are both arranged along the radial direction of the tube body to lock the support seat when it is adjusted to the unfolded state and the retracted state.

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