A device for decompressing and depressing renal cysts and its usage.

Abstract

The application discloses a renal cyst top-removing decompression device and a use method thereof. The device comprises a needle core, an inner core, a traction rod, a dilating sheath and an outer sheath. The needle core is detachably arranged in the inner core, and the traction rod is detachably arranged in the inner core. The traction rod is provided with a first air bag which pulls the wall of the renal cyst. The dilating sheath is detachably sleeved outside the inner core and is provided with a second air bag which dilates the gap between the perirenal fat and the wall of the renal cyst. The outer sheath is detachably sleeved outside the dilating sheath and is inserted into the dilated gap. The outer sheath is provided with a cutting assembly which circularly cuts the top cyst wall of the renal cyst by rotating the outer sheath. The traction rod pulls out the cut renal cyst wall. The renal cyst top-removing decompression device can pull, isolate and cut the wall of the renal cyst under non-direct vision, realizes low-invasive, safe and adjustable top cyst wall cutting of the renal cyst, takes out pathological tissues, improves the operation efficiency and safety, and reduces complications and medical costs.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a renal cyst decapping and decompression device and its usage method. Background Technology

[0002] Renal cysts are single or multiple benign cystic lesions filled with fluid that form within the kidney, and are a common type of kidney disease in clinical practice. Simple renal cysts and polycystic kidney disease are the most common. The incidence of simple renal cysts is relatively low and stable in people under 18 years of age, ranging from approximately 0.1% to 0.45%, with an average incidence of 0.22%. However, the incidence increases significantly with age: it is approximately 20% in people over 40 years of age, while it can reach as high as 50% in people over 60 years of age. With the increasing trend of population aging, the clinical detection rate of renal cysts is constantly rising. Currently, the main treatment methods for renal cysts include cyst aspiration sclerotherapy, laparoscopic decortication, and open surgical resection. Although cyst aspiration sclerotherapy is simple to perform and less invasive, the recurrence rate is high, especially for thick-walled or multilocular cysts, where the efficacy is poor. While laparoscopic or open cyst decortication is effective, the procedure is relatively complex, invasive, requires a long hospital stay, and is costly. It also places high demands on the patient's physical condition and the hospital's equipment, which limits its widespread application in primary hospitals and among elderly patients. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. This application provides a renal cyst decortication device and its method of use, which enables safe traction and controllable resection of the renal cyst wall under non-direct visualization conditions, improving surgical safety and flexibility, and reducing damage and surgical costs.

[0004] The renal cyst decortication device according to the first aspect of this application includes:

[0005] Inner core, wherein the inner core is provided with a first receiving cavity;

[0006] The needle core is detachably disposed in the first receiving cavity, and the working end of the needle core is provided with a needle tip, which is used to puncture the renal cyst.

[0007] The traction rod is detachably installed in the first receiving cavity, and the working end of the traction rod is provided with a first airbag, which is used to pull the wall of the renal cyst.

[0008] An expansion sheath is provided with a third receiving cavity, and the inner core is detachably disposed in the third receiving cavity. The working end of the expansion sheath is provided with a second air bladder, which is used to expand the space between the perirenal fat and the renal cyst wall.

[0009] The outer sheath has a fourth receiving cavity, and the expansion sheath is detachably disposed in the fourth receiving cavity. The outer sheath is provided with a cutting component for removing the wall of the renal cyst.

[0010] The renal cyst decortication device according to the embodiments of this application has at least the following beneficial effects:

[0011] The renal cyst decortication device of this application includes a needle core, an inner core, a traction rod, a dilating sheath, and an outer sheath. The inner core has a first receiving cavity for accommodating the needle core and the traction rod. The needle core is detachably disposed within the inner core, and its working end has a needle tip for puncturing the renal cyst. The traction rod is detachably disposed within the inner core, and its working end has a first air bladder. After the working end of the traction rod enters the renal cyst, the first air bladder inflates, thereby tractioning the renal cyst wall. The dilating sheath has a third receiving cavity and is detachably fitted onto the outside of the inner core, which is accommodated within the third receiving cavity. The dilating sheath is inserted into the gap between the perirenal fat and the renal cyst wall. The working end of the dilating sheath has a second air bladder for dilating the gap, creating space for the entry of the outer sheath. The outer sheath has a fourth receiving cavity and is detachably fitted onto the outside of the expansion sheath, which is accommodated within the fourth receiving cavity. The outer sheath is inserted into the gap and is equipped with a cutting component. The first balloon pulls the renal cyst wall into the fourth receiving cavity. Rotating the outer sheath causes the cutting component to circumferentially remove the top of the renal cyst wall, and a traction rod pulls the removed renal cyst wall out. This renal cyst decapping and decompression device enables precise traction, isolation, and resection of the renal cyst wall under non-direct visualization conditions. Through the coordinated work of needle core puncture, balloon traction and expansion, outer sheath insertion, and the cutting component, surrounding tissues are effectively isolated. The resection range is controlled according to the size of the renal cyst, achieving minimally invasive, safe, and adjustable cyst top resection, successfully removing pathological tissue, significantly improving surgical efficiency and safety, and reducing complications and medical costs.

[0012] According to some embodiments of this application, the traction rod is provided with a second receiving cavity, which extends through both ends of the traction rod.

[0013] According to some embodiments of this application, the cutting assembly is configured as an electrocautery knife assembly or a laser cutting assembly.

[0014] According to some embodiments of this application, the electrocoagulation knife assembly includes an electrocoagulation knife body, a swinging part, and a connecting rod. The electrocoagulation knife body is disposed at the working end of the outer sheath, the connecting rod is rotatably disposed inside the outer sheath, the swinging part is disposed at the other end away from the working end of the outer sheath, one end of the connecting rod is fixedly connected to the electrocoagulation knife body, and the other end of the connecting rod is fixedly connected to the swinging part.

[0015] According to some embodiments of this application, the laser cutting assembly includes a laser light guide fiber and a laser emission port. The laser emission port is disposed at the working end of the outer sheath, the laser light guide fiber is disposed inside the outer sheath, and the laser light guide fiber is connected to the laser emission port.

[0016] According to some embodiments of this application, the outer sheath is further provided with a liquid suction assembly, which includes a liquid suction port and a liquid suction pipe. The liquid suction port is located at the working end of the outer sheath, and the liquid suction port is fixedly connected to the liquid suction pipe.

[0017] The method of using the renal cyst decortication device according to the second aspect of this application includes the following steps:

[0018] S1. Insert the needle core into the inner core and puncture the renal cyst under ultrasound guidance;

[0019] S2. Remove the needle core, insert the traction rod into the inner core, insert the traction rod into the kidney cyst, inflate the first air bladder and aspirate the cyst fluid;

[0020] S3. The dilating sheath is fitted outside the inner core to the space between the perirenal fat and the renal cyst wall, and the second air sac is filled to dilate the space;

[0021] S4. The outer sheath is fitted over the perirenal fat and renal cyst wall space outside the dilator sheath and withdraws from the inner core and dilator sheath;

[0022] S5. Pull the traction rod to the preset position;

[0023] S6. The cutting assembly removes the top wall of the renal cyst;

[0024] S7. Remove the traction rod, which will then remove the excised renal cyst wall.

[0025] According to some embodiments of this application, step S6 includes: rotating the electrocoagulation blade from the storage position to the working position, and rotating the outer sheath so that the electrocoagulation blade can circumferentially remove the renal cyst wall.

[0026] According to some embodiments of this application, step S6 further includes: aspirating fluid from the cyst using the aspiration component.

[0027] According to some embodiments of this application, the method further includes the following step S0: determining the puncture point and cutting the skin. Attached Figure Description

[0028] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0029] Figure 1 This is a schematic diagram of the needle core structure according to one embodiment of this application;

[0030] Figure 2This is a schematic diagram of the inner core structure according to one embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the structure of a traction rod according to one embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the structure of an expansion sheath according to an embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the structure of the outer sheath according to one embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the top surface of the outer sheath in the storage position according to an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the bottom surface of the outer sheath in the storage position according to an embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the top surface of the outer sheath in the working position according to an embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the bottom surface of the outer sheath in the working position according to an embodiment of this application;

[0038] Figure 10 This is a schematic diagram of the resection process of a renal cyst decapping and decompression device according to an embodiment of this application.

[0039] Figure label:

[0040] Needle core 1; needle tip 11;

[0041] Inner core 2; First receiving cavity 21;

[0042] 3. Traction rod; 31. First connecting pipe; 32. First airbag; 33. Second receiving cavity;

[0043] Expansion sheath 4; third receiving cavity 41; second connecting tube 42; second airbag 43;

[0044] Outer sheath 5; fourth receiving cavity 51; connecting rod 52; electrocoagulation knife body 53; swinging part 54; suction port 55; suction pipe 56;

[0045] Epidermis 6;

[0046] 71. Kidney; 72. Kidney cyst; 73. Kidney cyst wall; 74. Perirenal fat. Detailed Implementation

[0047] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0048] In the description of this application, it should be understood that the use of terms such as "center," "middle," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] The following reference Figures 1 to 10 This application describes the renal cyst decapping and decompression device and its usage method in the embodiments of this application.

[0051] according to Figures 1 to 10As shown, one embodiment of the renal cyst decapping and decompression device of this application includes a needle core 1, an inner core 2, a traction rod 3, an expansion sheath 4, and an outer sheath 5. The inner core 2 is a hollow cylinder with a first receiving cavity 21 extending through both ends. The first receiving cavity 21 is used to receive the needle core 1 and the traction rod 3, and to guide them. The needle core 1 is cylindrical, with an outer diameter slightly smaller than the diameter of the first receiving cavity 21. The needle core 1 is detachably disposed within the first receiving cavity 21 of the inner core 2. The length of the needle core 1 is greater than the length of the inner core 2. The working end of the needle core 1 is provided with a needle tip 11, which is used to puncture the renal cyst 72. When the needle tip 11 contacts the renal cyst 72, the contact area is large, making it less likely to scratch the renal cyst 72, thus ensuring high safety. The traction rod 3 is cylindrical, with an outer diameter slightly smaller than the diameter of the first receiving cavity 21. The traction rod 3 is detachably mounted within the first receiving cavity 21 of the inner core 2. The length of the traction rod 3 is greater than the length of the inner core 2. A first air bladder 32 is provided at the working end of the traction rod 3. After the working end of the traction rod 3 enters the renal cyst 72, the first air bladder 32 inflates, thereby tractioning the renal cyst wall 73. The expansion sheath 4 is hollow cylindrical, with an inner diameter slightly larger than the outer diameter of the inner core 2. The expansion sheath 4 is provided with a third receiving cavity 41. The expansion sheath 4 is detachably fitted onto the outside of the inner core 2, allowing the inner core 2 to be accommodated within the third receiving cavity 41. A second air bladder 43 is provided at the working end of the expansion sheath 4. The second air bladder 43 is used to expand the gap between the perirenal fat 74 and the renal cyst wall 73, thereby achieving gentle expansion between tissue spaces and creating space for the entry of the outer sheath 5. The outer sheath 5 is a hollow cylinder, and the inner diameter of the outer sheath 5 is slightly larger than the outer diameter of the expansion sheath 4. The outer sheath 5 is provided with a fourth receiving cavity 51. The outer sheath 5 can be detachably fitted on the outside of the expansion sheath 4 so that the expansion sheath 4 is received in the fourth receiving cavity 51. The outer sheath 5 is inserted into the gap between the expanded perirenal fat 74 and the renal cyst wall 73. The outer sheath 5 is provided with a cutting component. By rotating the outer sheath 5, the cutting component can be used to circumferentially remove the top cyst wall of the renal cyst 72, thereby achieving precise de-rotting of the renal cyst 72.

[0052] During surgery:

[0053] Insert the needle core 1 into the inner core 2, and the needle tip 11 protrudes from the inner core 2. Under ultrasound guidance, puncture the renal cyst 72 to form a puncture channel.

[0054] Remove the needle core 1 from the inner core 2, insert the traction rod 3 into the inner core 2, insert the working end of the traction rod 3 into the kidney cyst 72, the first air bladder 32 inflates and expands, and the kidney cyst wall 73 is pulled by the first air bladder 32.

[0055] After the traction rod 3 is inserted and stabilized, the expansion sheath 4 is fitted over the inner core 2. The expansion sheath 4 is inserted into the gap between the perirenal fat 74 and the renal cyst wall 73. The second air bladder 43 inflates, thereby gently expanding the gap.

[0056] The outer sheath 5 is fitted over the expansion sheath 4 and inserted into the gap between the expanded perirenal fat 74 and the renal cyst wall 73.

[0057] After the outer sheath 5 is in place, remove the inner core 2 and the expansion sheath 4, leaving the traction rod 3 and the outer sheath 5 in place;

[0058] Pull the traction rod 3 to make the first airbag 32 completely enter the fourth receiving cavity 51 of the outer sheath 5;

[0059] The cutting assembly is used to circumferentially remove the cyst wall at the top of the renal cyst wall 73 by rotating the outer sheath 5;

[0060] Withdraw the traction rod 3, and under the action of the first airbag 32, remove the excised renal cyst wall 73 to complete the sampling of renal cyst 72.

[0061] The renal cyst decortication device provided in this application employs a step-by-step introduction structure consisting of an inner core 2, an expanding sheath 4, and an outer sheath 5. This allows for the stable establishment of a puncture channel during surgery, effectively isolating and protecting the surrounding parenchymal tissues and vascular and nerve structures of the kidney 71, significantly reducing the risk of tissue damage and postoperative complications common in traditional open or laparoscopic procedures. The traction rod 3 has a controllable inflatable first balloon 32 at its tip. After puncture into the cyst cavity, the balloon inflates, stably pulling the renal cyst wall 73 into the fourth receiving cavity 51 of the outer sheath 5. This is relatively safe, effectively isolating surrounding tissues and significantly reducing the possibility of collateral damage. The working end of the outer sheath 5 is equipped with a cutting component. By rotating the outer sheath 5, precise circular resection of the renal cyst wall 73 can be achieved. The entire cutting process is stable and the traction is controllable, ensuring the complete acquisition of the renal cyst wall 73. In addition, after the first air bladder 32 expands, it can fully pull the tissue at the top of the cyst into the fourth receiving cavity 51 of the outer sheath 5. The resection range can be flexibly adjusted according to the size and location of the renal cyst 72, making it suitable for different types and locations of renal cysts 72, including simple renal cysts 72 and some complex cysts. It has good adaptability and wide clinical application value. The renal cyst decapping and decompression device of this application does not rely on complex endoscopes or high-end image navigation equipment during operation, making it suitable for use in primary hospitals and medical institutions with limited equipment conditions, which helps to reduce the surgical threshold and medical costs. The entire surgical process is completed through a needle puncture path, including puncture, traction, dilation, cutting and removal. It has the advantages of minimal trauma, less bleeding, short operation time and fast postoperative recovery. Sufficient aspiration of cyst fluid effectively avoids the risk of recurrence caused by residual cyst fluid. The renal cyst wall 73 tissue can be completely removed, which is convenient for postoperative pathological examination, thereby improving the accuracy of renal cyst diagnosis and achieving safe and efficient resection and tissue acquisition of the top cyst wall of the renal cyst 72 under non-direct vision conditions.

[0062] In some embodiments, a first connecting pipe 31 is axially provided inside the wall of the traction rod. One end of the first connecting pipe 31 is connected to the first airbag 32 at the working end of the traction rod, and the other end of the first connecting pipe 31 is away from the working end of the traction rod.

[0063] In some embodiments, a second connecting tube 42 is axially arranged inside the rod wall of the expansion sheath 4. One end of the second connecting tube 42 is connected to the first airbag 32 at the working end of the traction rod, and the other end of the first connecting tube 31 is away from the working end of the traction rod.

[0064] according to Figure 3 , 10 As shown, in one embodiment of this application, the traction rod 3 is a hollow cylinder with a second receiving cavity 33 extending through both ends of the traction rod 3. The working end of the traction rod 3 is inserted into the renal cyst 72, and the other end is connected to a negative pressure suction device. During surgery, after the traction rod 3 is inserted into the renal cyst 72, the first air bladder 32 is inflated and deployed, adhering closely to and pulling the renal cyst wall 73. The second receiving cavity 33, extending through both ends of the traction rod 3, serves as a drainage channel for the cyst fluid. By connecting the negative pressure suction device, the cyst fluid is continuously suctioned out along the second receiving cavity 33 of the traction rod 3, achieving simultaneous traction and suction of the cyst fluid.

[0065] By incorporating a second receiving cavity 33 within the traction rod 3, the cystic fluid from the renal cyst 72 can be drained simultaneously with traction, preventing leakage of the fluid into surrounding tissues, reducing intracystic pressure, and enhancing the safety of the renal cyst decapping and decompression surgery. This also avoids the need for a separate suction path outside the cyst wall, reducing invasiveness to surrounding tissues and lowering the risk of trauma.

[0066] according to Figure 5 , 10 As shown, in one embodiment of this application, the cutting component can be selected as an electrocoagulation knife component or a laser cutting component according to different clinical needs, to adapt to the cyst wall resection operation of different types of renal cysts 72. After the traction rod 3 pulls the renal cyst wall 73 to the preset position, the cutting component is activated. If it is an electrocoagulation knife component, the blade contacts the cyst wall tissue after being energized, and coagulation and cutting are performed by high-frequency current to achieve simultaneous tissue separation and hemostasis; if it is a laser cutting component, the laser beam is led out through an optical fiber and focused on the cyst wall surface to vaporize and separate the tissue; thereby achieving efficient, safe, and minimally invasive resection of the top of the renal cyst wall 73, significantly enhancing the therapeutic effect and clinical application value of the renal cyst decapping and decompression device.

[0067] In some embodiments, the cutting component and the aspiration component are symmetrically arranged on both sides of the outer sheath 5, with the axis of the outer sheath 5 as the central axis of symmetry. During operation, the operator guides the outer sheath 5 into the renal cyst 72 region through the dilation sheath 4. With the assistance of the traction rod 3 pulling on the cyst wall, the cutting component is responsible for removing the top of the cyst wall, while the aspiration component simultaneously removes the cyst fluid, oozing blood, and tissue fragments generated during the cutting process. The symmetrical arrangement of the two components maintains stability during the cutting process and ensures the continuity of the circumferential cutting by the cutting component.

[0068] according to Figures 5 to 10 As shown, in one embodiment of this application, the electrocoagulation knife assembly includes an electrocoagulation knife body 53, a swinging part 54, and a connecting rod 52. The electrocoagulation knife body 53 is disposed at the working end of the outer sheath 5, with its front end slightly extending outward and having an arc-shaped or ring-shaped structure to contact and circumferentially cut the capsule wall tissue. The swinging part 54 is disposed at the other end away from the working end of the outer sheath 5, facilitating operation by the operator, and can be connected to the electrocoagulation host. The connecting rod 52 is rotatably disposed within the outer sheath 5 along the axial direction of the outer sheath 5, with one end of the connecting rod 52 fixedly connected to the electrocoagulation knife body 53 and the other end fixedly connected to the swinging part 54. The operator can rotate the connecting rod 52 to drive the electrocoagulation knife body 53 to rotate by swinging the angle of the swinging part 54, switching between the storage position and the working position.

[0069] After the traction rod 3 pulls the renal cyst wall 73 into the fourth receiving cavity 51 of the outer sheath 5, the operator can adjust the angle of the swinging part 54 to rotate the connecting rod 52, causing the electrocoagulation knife body 53 to rotate from the storage position to the working position. The operator turns on the electrocoagulation knife power supply, and the electrocoagulation knife body 53 performs electrocoagulation cutting on the cyst wall at the top of the renal cyst 72 under the action of current, while simultaneously achieving hemostasis. Rotating the outer sheath 5 once allows the electrocoagulation knife body 53 to make a uniform cut around the cyst wall, completing the complete removal of the cyst wall at the top of the renal cyst 72. Through the design of the outer sheath 5 and its electrocoagulation knife components, the electrocoagulation knife body 53 can perform a 360° circumferential cut around the renal cyst wall 73, ensuring complete removal of the cyst wall and neat cut edges. The accompanying tissue electrocoagulation during cutting effectively reduces intraoperative bleeding, maintains a clear surgical field, improves surgical safety, and ensures that the circumferentially cut cyst wall is intact, making it easy to remove from the body by the traction rod 3, greatly simplifying the surgical procedure.

[0070] according to Figure 10 As shown, the laser cutting assembly includes a laser guide fiber and a laser outlet. The laser guide fiber is arranged along the inner wall of the outer sheath 5. One end of the laser guide fiber can be connected to a laser generator, and the other end extends to the working end and connects to the laser outlet. The laser outlet is located at the working end of the outer sheath 5 and is used to focus the laser onto the cyst wall for laser cutting of the top of the renal cyst 72.

[0071] In other embodiments, the cutting component may also be configured as other instruments for tissue cutting operations.

[0072] As shown in Figures 5 to 10, in one embodiment of this application, the outer sheath 5 is further provided with a suction assembly, which is internally disposed on the body of the outer sheath 5. The suction assembly includes a suction port 55 and a suction conduit 56. The suction port 55 is disposed on the working end of the outer sheath 5, facing the renal cyst 72. The suction port 55 is connected to one end of the suction conduit 56, which extends axially along the outer sheath 5. The other end of the suction conduit 56 can be externally connected to a negative pressure suction device. When the outer sheath 5 is placed in the gap between the perirenal fat 74 and the renal cyst wall 73, and the cutting assembly circumferentially cuts the top cyst wall of the renal cyst 72, the suction assembly connects to the negative pressure suction device, causing the suction port 55 to generate negative pressure. This enables timely and continuous suction of cyst fluid, oozing blood, or tissue debris during cutting, maintaining a good surgical field, assisting in the cutting operation, and improving the safety of the surgical environment. It also reduces the risk of residual cyst fluid after surgery, helping to reduce the risk of postoperative complications. The suction function and cutting components are integrated into the same outer sheath 5, which facilitates one-stop operation by the operator and reduces the difficulty of operation.

[0073] according to Figures 1 to 10 As shown, the second embodiment of this application illustrates the method of using the renal cyst decortication device. The renal cyst decortication device includes a needle core 1, an inner core 2, a traction rod 3, a dilation sheath 4, and an outer sheath 5. The renal cyst decortication device includes the following steps:

[0074] S1. Insert the needle core 1 into the inner core 2 to form a puncture unit. Under ultrasound guidance, the needle tip 11 punctures the renal cyst 72 to form a puncture channel.

[0075] S2. Withdraw the needle core 1, insert the traction rod 3 into the inner core 2, insert the traction rod 3 into the kidney cyst 72, inflate the first air bladder 32, and at the same time aspirate the cyst fluid through the second receiving cavity 33;

[0076] S3. The expansion sheath 4 is fitted into the gap between the outer part of the inner core 2 and the perirenal fat 74 and the renal cyst wall 73, and the second air sac 43 is inflated to expand the gap, making it easier for the outer sheath 5 to be fitted in later.

[0077] S4. The outer sheath 5 is fitted over the outside of the dilating sheath 4 into the gap between the aforementioned dilated perirenal fat 74 and the renal cyst wall 73, and then withdraws from the inner core 2 and the dilating sheath 4;

[0078] S5. Pull the traction rod 3, and the traction rod 3 pulls the renal cyst wall 73 to the cutting position at the working end of the outer sheath 5;

[0079] S6. Activate the cutting assembly to remove the top wall of the renal cyst 72;

[0080] S7. Withdraw traction rod 3, and traction rod 3 will remove the excised renal cyst wall 73.

[0081] The method of using the renal cyst decortication device according to the second embodiment of this application, through the step-by-step implementation of puncture, traction, dilation, cutting, and tissue removal, can accurately establish a surgical channel under ultrasound guidance, and effectively separate the renal cyst 72 from the perirenal tissue through a controllable second balloon 43, ensuring a clear and safe operating area. The traction rod 3, used in conjunction with the first balloon 32, can stably pull the renal cyst wall 73 to the cutting position, and combined with the annular cutting component, accurately remove and completely obtain the top of the renal cyst wall 73, effectively reducing intraoperative risks such as cyst wall tearing and tissue residue. The method of using the renal cyst decortication device of this application is characterized by minimal trauma, accurate positioning, and convenient operation, which helps to improve the safety and efficiency of minimally invasive treatment of renal cysts 72.

[0082] according to Figures 5 to 10 As shown, in one embodiment of this application, the cutting component is specifically configured as an electrocoagulation knife assembly, which includes an electrocoagulation knife body 53, a swinging part 54, and a connecting rod 52. The swinging part 54 is externally connected to the electrocoagulation host. Step S6 includes starting the electrocoagulation host, swinging the swinging part 54 to drive the connecting rod 52 to switch the electrocoagulation knife body 53 from the storage position to the working position, rotating the outer sheath 5 to make the electrocoagulation knife body 53 perform circumferential cutting on the top cyst wall of the retracted renal cyst 72; after the cutting is completed, the rotation of the outer sheath 5 is stopped, and the electrocoagulation knife body 53 is retracted to the storage position.

[0083] according to Figures 5 to 10 As shown, in one embodiment of this application, step S6 of the method of using the renal cyst decapping and decompression device further includes aspiration of cyst fluid by a suction component. Specifically, step S6 also includes activating the negative pressure suction device, forming a negative pressure at the suction port 55, and simultaneously aspirating the cyst fluid, oozing blood, and tissue fragments at the cut site while the top cyst wall of the renal cyst 72 is being circularly cut;

[0084] according to Figure 10 As shown, in one embodiment of this application, the method of using the renal cyst decapping and decompression device further includes step S0: determining the puncture point and cutting the skin. Step S0 specifically includes selecting the point with the shortest distance between the skin and the renal cyst 72 after color Doppler ultrasound scanning as the puncture point, with the endpoint being inside the renal cyst 72; using a scalpel to cut the skin at the pre-selected puncture point on the body surface, making a small incision of about 1 cm to form a minimally invasive channel, facilitating the subsequent insertion of instruments.

[0085] The following are the specific steps of one of the methods for using the renal cyst decortication device of this application:

[0086] Step S0:

[0087] S0.1 Connect the negative pressure suction device to the suction pipe 56, connect the electrocoagulation host to the swing part 54, and place the electrocoagulation knife body 53 in the storage position;

[0088] S0.2 Determine the puncture point. After color Doppler ultrasound scan, select the point with the shortest distance between the skin and the renal cyst 72 as the puncture point, and the endpoint is inside the renal cyst 72.

[0089] S0.3 Using a scalpel, make a small incision of about 1 cm in size in the epidermis at the pre-selected puncture point on the body surface to form a minimally invasive channel, which facilitates the subsequent insertion of instruments.

[0090] Step S1:

[0091] S1.1 Insert the needle core 1 into the inner core 2 to form an integrated puncture unit, with the needle tip 11 of the needle core 1 extending to the outer side of one end of the inner core 2;

[0092] S1.2 Under ultrasound guidance, the puncture unit enters the renal cyst 72 through the needle tip 11.

[0093] Step S2:

[0094] S2.1 Remove the needle core 1 from the inner core 2 and insert the traction rod 3 into the inner core 2;

[0095] S2.2 The traction rod 3 is equipped with a first air bladder 32. After the traction rod 3 enters the kidney cyst 72, the first air bladder 32 is inflated and expands. The first air bladder 32 unfolds and abuts against the inner side of the kidney cyst wall 73.

[0096] S2.3 is connected to the negative pressure device through the second receiving cavity 33 on the traction rod 3. The cyst fluid in the kidney cyst 72 is aspirated and emptied through the second receiving cavity 33 to prevent infection.

[0097] Step S3:

[0098] S3.1 The dilation sheath 4 is fitted onto the outside of the inner core 2, so that the working end of the dilation sheath 4 is inserted into the gap between the perirenal fat 74 and the renal cyst wall 73.

[0099] S3.2 The second air sac 43 on the expansion sheath 4 is filled and expanded, so that the second air sac 43 expands and opens the gap between the perirenal fat 74 and the renal cyst wall 73, forming an expansion space to facilitate the insertion of the outer sheath 5.

[0100] Step S4:

[0101] S4.1 In the expanded state, the outer sheath 5 is fitted over the outside of the expanding sheath 4, so that the working end of the outer sheath 5 is also inserted into the gap between the expanded perirenal fat 74 and the renal cyst wall 73.

[0102] S4.2 After the outer sheath 5 is inserted into the target position, the inner core 2 and the expansion sheath 4 are withdrawn in sequence, while the traction rod 3 and the outer sheath 5 are retained;

[0103] Step S5:

[0104] After the first air bladder 32 is inflated by the S5.1 traction rod 3, the traction rod 3 is slowly pulled outward along the axial direction of the outer sheath 5 to pull the top of the renal cyst wall 73 into the fourth receiving cavity 51 of the outer sheath 5 and pull it to the cutting position of the working end of the outer sheath 5.

[0105] Step S6:

[0106] S6.1 Start the electrocoagulation host, swing the swing part 54, and the connecting rod 52 drive the electrocoagulation knife body 53 to rotate, so that the electrocoagulation knife body 53 rotates from the storage position to the working position;

[0107] S6.2 Start the negative pressure suction device, and a negative pressure is formed at the suction port 55;

[0108] S6.3 Rotate the outer sheath 5 to drive the electrocoagulation knife body 53 to achieve a circular cut on the top cyst wall of the renal cyst 72, while the aspiration port 55 simultaneously aspirates the cyst fluid, oozing blood and tissue fragments at the cut site.

[0109] Step S7:

[0110] After S7.1 completes the circumcision, the traction rod 3 is withdrawn. During the withdrawal process, the first air bladder 32 of the traction rod 3 expands and pulls the resected renal cyst wall 73 out.

[0111] 7.2 Exit the outer sheath 5.

[0112] The renal cyst decortication device provided in this application adopts a multi-layered structure design with an inner core 2, an expansion sheath 4, and an outer sheath 5 introduced in stages. This design is simple, easy to operate, and significantly reduces hardware requirements and surgical equipment conditions. Combined with ultrasound guidance, it achieves precise and safe puncture positioning and puncture channel establishment, effectively protecting the tissues, blood vessels, and nerves surrounding the kidney 71 and significantly reducing the risk of injury. Depending on the volume of the renal cyst 72, a sufficient length of the renal cyst wall 73 can be pulled into the outer sheath 5 using a traction rod, thereby adjusting the range of the renal cyst wall 73 to be removed, adapting to different cyst volumes and locations, and having a wide range of applications. The controllably expandable first balloon 32 stably pulls the renal cyst wall 73 into the outer sheath 5, providing a precise and controllable circular resection path for the rotating cutting component, ensuring complete removal of the renal cyst wall 73 and ensuring no fragments remain in the aspiration component. The expansion sheath 4 and the second balloon 43 gently expand the surgical space, improving safety. The entire surgical procedure does not require complex laparoscopy or high-end equipment, is low-cost, and suitable for primary healthcare institutions. It has advantages such as being minimally invasive, having less bleeding, and having a short operation time. The cyst wall tissue can be completely removed under non-direct vision to assist in pathological diagnosis, improve surgical efficiency and treatment effect, effectively prevent residual cyst fluid and recurrence, and achieve safe and efficient resection and decompression of the top of the renal cyst.

[0113] In the description of this specification, the use of terms such as "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0114] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A renal cyst decortication device, characterized by: Comprising an inner core provided with a first accommodating cavity; a needle core detachably arranged in the first accommodating cavity, an operating end of the needle core being provided with a needle tip for puncturing a renal cyst; a traction rod provided with a second accommodating cavity penetrating through both ends of the traction rod, the second accommodating cavity being connected with a negative pressure device, and the second accommodating cavity being used for sucking and emptying cystic fluid in the renal cyst, the traction rod being detachably arranged in the first accommodating cavity, an operating end of the traction rod being provided with a first air bag for abutting against the inner side of the renal cyst wall to traction the renal cyst wall; a dilating sheath provided with a third accommodating cavity, the inner core being detachably arranged in the third accommodating cavity, an operating end of the dilating sheath being provided with a second air bag for dilating the space between the perirenal fat and the renal cyst wall to facilitate the insertion of an outer sheath; an outer sheath provided with a fourth accommodating cavity, the dilating sheath being detachably arranged in the fourth accommodating cavity, the outer sheath being provided with a cutting assembly for cutting the renal cyst wall.

2. The renal cyst decortication device of claim 1, wherein: The cutting assembly is arranged as an electrocautery knife assembly or a laser cutting assembly.

3. The renal cyst decortication device of claim 2, wherein: The electrocautery knife assembly comprises an electrocautery knife body, a swing part and a connecting rod, the electrocautery knife body being arranged at an operating end of the outer sheath, the connecting rod being rotatably arranged in the outer sheath, the swing part being arranged at the other end away from the operating end of the outer sheath, one end of the connecting rod being fixedly connected with the electrocautery knife body, and the other end of the connecting rod being fixedly connected with the swing part.

4. The renal cyst decortication device of claim 2, wherein: The laser cutting assembly comprises a laser light guide fiber and a laser exit port, the laser exit port being arranged at an operating end of the outer sheath, and the laser light guide fiber being arranged in the outer sheath and connected with the laser exit port.

5. The renal cyst decortication device of claim 1, wherein: The outer sheath is further provided with a liquid suction assembly, the liquid suction assembly comprising a liquid suction port and a liquid suction pipeline, the liquid suction port being arranged at an operating end of the outer sheath and fixedly connected with the liquid suction pipeline.

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