A cooling catheter for transperineal prostate ablation and a method of using the same

Abstract

The present invention provides a cooling catheter for transperineal prostate ablation and a method of using the same, belonging to the technical field of medical auxiliary devices. It includes a tube body, the two ends of the tube body are respectively connected with a joint structure and a connecting structure, the inner surface wall of the connecting structure is provided with a urinary catheter, the outer surface wall of the urinary catheter is provided with a tube head structure, and the tube head structure is fixedly connected to the end opposite to the connecting structure, and the interior of the tube body is provided with a penetrating water inlet cavity, an air bag cavity and a water outlet cavity; the guide structure is arranged at the connecting position of the tube body and the connecting structure, and is connected to the tube body and the connecting structure. The present invention sets a guide structure and an isolation component, the first reducer is the only outlet for the urinary catheter to discharge urine, and the second reducer is the inlet of the water inlet cavity, and the first reducer and the second reducer can be isolated by the isolation component, so as not to affect the two independent operations of cooling cycle and catheterization.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary tools, and in particular to a cooling catheter used in transperineal prostate ablation and a method of using the same. Background Art

[0002] Prostate ablation is a minimally invasive surgical method for treating prostate hyperplasia or prostate cancer. Under the guidance of a dual-plane ultrasound probe, the ablation needle is punctured through the perineum to the proliferating glands or cancer foci around the urethra. The heating effect of the front end of the radio frequency, microwave or laser ablation needle causes coagulative necrosis of the prostate tissue or cancer foci.

[0003] A Chinese patent with publication number CN 203710528 U discloses a cold circulation urinary catheter, comprising a tube body, a urinary catheter, a connecting tube and a joint. The tube body is provided with three channels, namely a urinary catheter channel, a water inlet channel and a water outlet channel. The urinary catheter channel opens at the insertion end of the tube body, and the other end of the urinary catheter channel is connected to the urinary catheter leading out of the tube body side wall. The other end of the urinary catheter is connected to the joint. The water inlet channel and the water outlet channel are respectively connected to the connecting tube and the joint at the external end. When radiofrequency ablation is clinically applied to treat prostate diseases, low-temperature water is transported through the water inlet channel and the water outlet channel in the tube body to avoid the patient's local urethral temperature from rising and thermal damage to the prostate urethra during the radiofrequency process, thereby reducing the occurrence of complications. The urinary catheter can be used for urinary catheterization and urethral cooling at the same time, realizes multiple functions of one tube, is easy to operate, and is safe and reliable.

[0004] The water inlet channel and the water outlet channel of the above-mentioned cold circulation catheter are located on both sides of the inside of the tube body, and the contact area with the inner wall of the urethra is small, so that during the cooling process, the cooling range of the inner wall of the urethra is small, and the puncture position of the ablation needle cannot be accurately cooled, resulting in poor cooling effect. At the same time, the existing catheter expands and limits the position at the connection between the bladder and the urethra by injecting liquid through the airbag, which requires opening another liquid injection channel inside the catheter, which will affect the position of the water inlet channel and the water outlet channel, resulting in the problem of smaller aperture of the catheter channel, the water inlet channel and the water outlet channel or one of the three. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a cooling catheter for use in transperineal prostate ablation and a method of using the same. By arranging a tube body, a connecting structure, a guide assembly and an isolation assembly, the problem that the water inlet channel and the water outlet channel of the existing cold circulation catheter are located on both sides of the inside of the tube body, and the contact surface with the inner wall of the urethra is small, so that during the cooling process, the cooling range of the inner wall of the urethra is small, and the puncture position of the ablation needle cannot be accurately cooled, resulting in poor cooling effect. At the same time, the existing catheter is limited by expanding the connection between the bladder and the urethra through the injection of liquid by an airbag, which requires opening another injection channel inside the catheter, which will affect the position of the water inlet channel and the water outlet channel, resulting in the problem that the aperture of the catheter channel, the water inlet channel and the water outlet channel or one of them becomes smaller.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A cooling catheter for use in transperineal prostate ablation and a method of using the same, comprising a tube body, wherein two ends of the tube body are respectively connected to a joint structure and a connecting structure, the inner surface wall of the connecting structure is sheathed with a urinary catheter, the outer surface wall of the urinary catheter is sheathed with a tube head structure, and the tube head structure is fixedly connected to the end opposite to the connecting structure, the interior of the tube body is provided with a penetrating water inlet cavity, an air bag cavity and a water outlet cavity; a guide structure is arranged at the connecting position of the tube body and the connecting structure, and is connected to the tube body and the connecting structure, the guide structure is used to guide cooling water passing through the water inlet cavity and urine in the urinary catheter; an isolation component is arranged inside the guide structure and is connected, the isolation component is used to temporarily close and open the connecting position of the connecting structure and the catheter.

[0008] Optionally, the joint structure includes a cooling water outlet head fixedly connected to one end of the tube body and connected to the water outlet cavity, the inner wall of the cooling water outlet head is wrapped with a cooling water inlet head connected to the water inlet cavity, and one end of the tube body is connected to an airbag joint connected to the airbag cavity; the water inlet cavity is opened at the center position of the tube body, the water outlet cavity is 300° ring-shaped and surrounds the outside of the water inlet cavity, and the airbag cavity is opened at both ends of the water outlet cavity.

[0009] Optionally, the connecting structure includes a connecting ring tube fixedly connected to one end of the tube body, the connecting ring tube is adapted to the shape of the water outlet cavity, both ends of the connecting ring tube are fixedly connected with closing blocks adapted to the port surfaces thereof, the closing blocks are provided with a penetrating connecting port, the inner surface wall of the connecting ring tube is fixedly connected with a urinary catheter connecting ring, a cooling guide groove with a top protruding outward is provided between the urinary catheter connecting ring and the connecting ring tube, a first isolation groove connected to the cooling guide groove is provided on the inner wall of the urinary catheter connecting ring, a second isolation groove adapted to the first isolation groove is provided at one end of the urinary catheter, one end of the urinary catheter is sleeved on the inner surface wall of the urinary catheter connecting ring, and the second isolation groove corresponds to the position of the first isolation groove.

[0010] Optionally, the tube head structure includes an airbag tube fixedly connected to one side of the connecting structure, the outer wall of the airbag tube is provided with an airbag groove, and the surface of the airbag groove is provided with a penetrating airbag water outlet, the airbag water outlet and the connecting port are connected to the airbag cavity, airbags are fixedly connected to both ends of the airbag groove, and a urinary catheter is fixedly connected to one end of the airbag tube.

[0011] Optionally, the guiding structure includes a top surface fixedly connected to the second isolation groove and the first isolation groove, one end of the first reducer is fixedly connected to the isolation tube, the end of the isolation tube away from the first reducer is fixedly connected to the second reducer, the surface wall of the isolation tube is provided with four isolation chutes distributed at 90° to each other, the top of the isolation chute is provided with a closed groove, and the surface wall of the second reducer is provided with a plurality of urine outlet strip grooves distributed in a ring shape.

[0012] Optionally, a sliding rod is fixedly connected between the two ends of the isolation chute, a guide strip is fixedly connected to the end of the urine outlet strip groove close to the isolation tube, a guide groove is opened on one side of several guide strips, a urine guide ring is fixedly connected to the end of several guide strips away from the isolation tube, the bottom end of the urine guide ring is fixedly connected to the outer wall of the second reducer, the urine guide ring is in an outward-turned structure opposite to the turning direction of the urine guide ring, and the guiding structure is an integrally formed structure by die-casting.

[0013] Optionally, the isolation assembly includes four limiting units slidably connected to the sliding rod, and inner surfaces of the four limiting units are fixedly connected with cone disks, and the cone disks are conical structures with the cones facing the catheter.

[0014] Optionally, the limiting unit includes a second mounting strip fixedly connected to the surface wall of the cone disk, both ends of the second mounting strip are fixedly connected to connecting plates, the ends of the two connecting plates away from the second mounting strip are fixedly connected to the first mounting strip, the bottom ends of the second mounting strip and the connecting plate are fixedly connected to an elastic plate in an outward-turned shape, the bottom ends of the two elastic plates are fixedly connected to a first expansion membrane, and the second mounting strip, the first mounting strip, the elastic plate and the second expansion membrane are fixedly connected to both side surfaces of the first mounting strip, the elastic plate and the first expansion membrane.

[0015] Optionally, the thickness of the elastic sheet gradually changes from thin to thick from the middle to both sides, and the first mounting bar and the second mounting bar are both provided with sliding holes adapted to the sliding rod, and the limiting unit and the isolation tube are slidably connected through the sliding holes and the sliding rod.

[0016] The present invention also provides a method for using a cooling catheter in a prostate ablation operation, comprising the following steps:

[0017] S1. When transperineal prostate ablation is required, the tube head structure is inserted from the urethra until it enters the bladder;

[0018] S2. Fill the airbag joint with water. The water flows through the airbag cavity, the connection port and the airbag water port in sequence until it enters the airbag groove. During the continuous water filling process, the water inside the airbag groove will slowly prop up the airbag until the airbag expands to a preset range.

[0019] S3, the water inlet cavity is filled with cooling water, and the cooling water flows through the water inlet cavity to the guide structure. The cooling water passing through the guide structure will impact the isolation component, thereby closing the port of the urinary catheter. The cooling water passing through the guide structure will flow into the water outlet cavity inside the connecting structure, thereby cooling the urethra surface wall contacted by the outer wall of the tube body;

[0020] S4. After the prostate ablation surgery is completed, the urine in the bladder needs to be assisted to be discharged for a certain period of time. When the urine needs to be discharged, the urine in the bladder is discharged into the catheter through the tube head structure. The urine in the catheter will squeeze the isolation component, so that the guide structure is connected with the tube body, so that the urine can flow into the water inlet cavity and then be discharged.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] In the above scheme, by setting a tube body and a connecting structure, the tube body and the connecting structure cooperate with each other to realize the circulation of cooling water and cool the urethra inside the prostate, thereby preventing the urethra wall from being burned during prostate ablation surgery. At the same time, the water outlet cavity is a 300° annular groove, which can increase the contact area of ​​the cooling water inside the water outlet cavity, thereby increasing the cooling effect of the cooling water on the urethral surface wall; after the prostate ablation surgery, it is used as a urine catheter to drain the urine in the bladder and then used as a urinary catheter, without the need to pull out the tube body after the operation and then reinsert the catheter into the urethra.

[0023] By setting up a guiding structure and an isolation component, the first reducer is the only outlet for the urinary catheter to discharge urine, and the second reducer is the inlet of the water inlet chamber. The first reducer and the second reducer can be isolated by the isolation component, so as not to affect the two independent operations of cooling cycle and urination.

[0024] By setting a limiting unit, the limiting unit isolates the catheter through the impact force of cooling water through the first expansion membrane, the second expansion membrane and the elastic sheet, without the need for other workpieces to assist in limiting and without the need for staff to operate.

[0025] By setting up a water inlet cavity, the water inlet cavity is used together as a water inlet pipe and a urination tube for cooling water, and there is no need to open a separate water inlet channel and a urination channel, thereby reducing the use of space in the cooling catheter and then increasing the size of the water outlet cavity, so that the distribution and pore size distribution of the water inlet cavity, the water outlet cavity and the airbag cavity are more suitable for cooling during ablation surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0027] Figure 1 A schematic diagram of the three-dimensional structure of a cooling catheter used in transperineal prostate ablation surgery;

[0028] Figure 2 A schematic diagram of the exploded three-dimensional structure of a cooling catheter used in transperineal prostate ablation surgery;

[0029] Figure 3 It is a schematic diagram of the cutaway three-dimensional structure of the pipe body, pipe head structure, guide structure and connection structure assembly part;

[0030] Figure 4 It is a schematic diagram of the exploded three-dimensional structure of the connection structure and the urinary catheter;

[0031] Figure 5 A schematic diagram of a first-person perspective stereoscopic magnified structure of the guiding structure;

[0032] Figure 6 It is a schematic diagram of the second-view stereoscopic structure of the guiding structure;

[0033] Figure 7 Schematic diagram of the exploded three-dimensional structure of the guide structure and isolation components;

[0034] Figure 8 It is a schematic diagram of the three-dimensional structure of the isolation component;

[0035] Fig. 9 A schematic diagram of a cutaway three-dimensional structure of an isolation component;

[0036] Fig.10 for Fig. 9 Schematic diagram of the three-dimensional enlarged structure at point A in the middle.

[0037] [Reference Signs]

[0038] 1. Joint structure; 11. Cooling water inlet; 12. Airbag joint; 13. Cooling water outlet; 2. Tube body; 21. Water inlet cavity; 22. Airbag cavity; 23. Water outlet cavity; 3. Tube head structure; 31. Airbag tube; 311. Airbag groove; 312. Airbag water outlet; 32. Airbag; 33. Urine guide head; 4. Guide structure; 41. First reducer; 42. Isolation tube; 421. Isolation chute; 422. Closed groove; 43. Second reducer; 431. Urine outlet strip groove; 44. Guide strip; 4 41. guide groove; 45. urinary catheter ring; 46. slide rod; 5. connection structure; 51. closing block; 511. connection port; 52. urinary catheter connection ring; 521. first isolation groove; 53. connection ring tube; 54. cooling guide groove; 6. urinary catheter; 61. second isolation groove; 7. isolation assembly; 71. cone disk; 72. limit unit; 721. second expansion membrane; 722. first mounting strip; 723. elastic sheet; 725. first expansion membrane; 726. second mounting strip; 727. connection sheet.

[0039] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0040] The following is a detailed description of a cooling catheter for prostate ablation surgery and a method of using the same provided by the present invention in conjunction with the accompanying drawings and specific embodiments. It is also noted that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0041] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0042] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0043] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0044] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0045] like Figures 1 to 10 As shown, an embodiment of the present invention provides a cooling catheter for use in prostate ablation surgery, including a tube body 2. The tube body 2 cooperates with a connecting structure 5 to realize the circulation of cooling water, thereby cooling the urethra inside the prostate, thereby preventing the urethra wall from being burned during the prostate ablation surgery. At the same time, after the prostate ablation surgery, it serves as a urine catheter to drain the urine in the bladder, thereby serving as a three-lumen urinary catheter for use, and there is no need to pull out the tube body 2 after the operation and then reinsert the three-lumen urinary catheter into the urethra.

[0046] The two ends of the tube body 2 are respectively fixedly connected with a joint structure 1 and a connection structure 5. The joint structure 1 is used to connect with the outside to realize the in-and-out circulation of cooling water, and at the same time flush the airbag 32 with water to expand it. The connection structure 5 is used to connect the tube body 2 and the catheter 6, so that after the prostate ablation operation, urine can be discharged from the tube body 2 through the catheter 6. The inner surface wall of the connection structure 5 is provided with the catheter 6, and the outer surface wall of the catheter 6 is provided with a tube head structure 3, and the tube head structure 3 is fixedly connected to the end opposite to the connection structure 5. The tube head structure 3 is used to pass through the urethra into the bladder, thereby realizing the connection between the catheter 6 and the inside of the bladder, and then the urine in the bladder can be discharged through the catheter 6.

[0047] The interior of the tube body 2 is provided with a water inlet chamber 21, an air bag chamber 22 and a water outlet chamber 23. The water inlet chamber 21 is used for the entry of cooling water and the discharge of urine from the bladder, and the water outlet chamber 23 is used for the discharge of cooling water. The cooling water passing through the water outlet chamber 23 is used to cool the surface wall of the urethra. The air bag chamber 22 is used to be filled with water to expand and swell the air bag 32, so that the entire tube head structure 3 is restricted in the bladder and will not fall from the urethra. The guide structure 4 is located at the connecting position of the tube body 2 and the connecting structure 5, and is connected to the tube body 2 and the connecting structure 5. The guide structure 4 is used to guide the cooling water passing through the water inlet chamber 21 and the urine in the urinary catheter 6; the isolation component 7 is located inside the guide structure 4 and is connected thereto. The isolation component 7 is used to temporarily close and open the connecting position of the connecting structure 5 and the urinary catheter 6 to prevent the cooling water from entering the bladder through the urinary catheter 6.

[0048] Before the prostate ablation operation is required, the tube head structure 3 is inserted from the urethra until it enters the bladder. At this time, the tube body 2 is inside the urethra, and then cooling water is filled into the water inlet chamber 21. The cooling water passes through the water inlet chamber 21 to the guide structure 4. The cooling water passing through the guide structure 4 will impact the isolation component 7, thereby closing the port of the catheter 6. The cooling water passing through the guide structure 4 will flow into the water outlet chamber 23 inside the connecting structure 5, thereby cooling the urethra surface wall that is in contact with the outer wall of the tube body 2. After the prostate ablation operation is completed, the urine in the bladder needs to be assisted to be discharged for a certain period of time. When the urine needs to be discharged, the urine in the bladder is discharged into the catheter 6 through the tube head structure 3. The urine inside the catheter 6 will squeeze the isolation component 7, so that the guide structure 4 is connected with the tube body 2, so that the urine can flow into the water inlet chamber 21, and then the urine is discharged.

[0049] like Figures 1 to 3As shown, the joint structure 1 includes a cooling water outlet head 13 fixedly connected to one end of the tube body 2 and connected to the water outlet cavity 23, the inner wall of the cooling water outlet head 13 is wrapped with a cooling water inlet head 11 connected to the water inlet cavity 21, one end of the tube body 2 is connected to an airbag joint 12 connected to the airbag cavity 22, the cooling water outlet head 13 is used to communicate with the water inlet of an external cooling water circulation structure, the cooling water inlet head 11 is externally connected to a three-way pipe, one of the pipes of the three-way pipe is connected to the water outlet of the external cooling water flushing structure, thereby realizing continuous flushing of cooling water, and the other pipe of the three-way pipe is connected to an external urine bag. When the inner wall of the urethra is cooled, the pipe connected to the urine bag is closed by adjusting the three-way pipe.

[0050] When urination is required, the pipe connected to the water outlet of the external cooling water flushing structure is closed, so that the urine inside the bladder flows into the urine bag through the water inlet chamber 21. The water inlet chamber 21 is opened at the center of the tube body 2, and the water outlet chamber 23 is 300° ring-shaped and surrounds the outside of the water inlet chamber 21. The water outlet chamber 23 is a 300° annular groove, which can increase the contact area of ​​the cooling water inside the water outlet chamber 23, thereby increasing the cooling effect of the cooling water on the surface wall of the urethra. The airbag chamber 22 is opened at both ends of the water outlet chamber 23. The tube head structure 3 includes an airbag tube 31 fixedly connected to one side of the connecting structure 5, and the outer wall of the airbag tube 31 is opened The airbag groove 311 has an airbag water inlet 312 extending therethrough on its surface. The airbag water inlet 312 and the connecting port 511 are in communication with the airbag cavity 22. The airbags 32 are fixedly connected to both ends of the airbag groove 311. The urinary catheter head 33 is fixedly connected to one end of the airbag tube 31. When working, the airbag cavity 22 is filled with water. The water flows through the airbag cavity 22, the connecting port 511 and the airbag water inlet 312 in sequence until it enters the airbag groove 311. During the continuous water filling process, the water inside the airbag groove 311 will slowly prop up the airbag 32 until the airbag 32 expands, thereby restricting the tube head structure 3 in the bladder.

[0051] like Figure 3 and Figure 4As shown, the connection structure 5 includes a connecting ring tube 53 fixedly connected to one end of the tube body 2, the connecting ring tube 53 is used to connect the tube body 2, the connecting ring tube 53 is adapted to the shape of the water outlet cavity 23, and both ends of the connecting ring tube 53 are fixedly connected with closing blocks 51 adapted to the surface of its port, the closing block 51 is used to cooperate with the connecting ring tube 53 to form a ring, so as to adapt to the port of the tube body 2, and a through connecting port 511 is opened on the closing block 51, and the connecting port 511 is used to connect the airbag water outlet 312 and the airbag cavity 22, and the inner surface wall of the connecting ring tube 53 is fixedly connected with a urinary catheter connecting ring 52, and the urinary catheter connecting ring 52 is used to be fixedly connected with the urinary catheter 6, wherein the inner circle diameter of the urinary catheter connecting ring 52 is consistent with the outer circle diameter of the urinary catheter 6, and a cooling guide groove 54 with a top convex outward is opened between the urinary catheter connecting ring 52 and the connecting ring tube 53, and the cooling guide groove 54 is used The cooling water is guided so that the cooling water coming out of the first isolation groove 521 on the catheter connection ring 52 is guided into the water outlet chamber 23. At the same time, the top of the cooling guide groove 54 is an outwardly convex arc structure. When the cooling water passes through the cooling guide groove 54, the convex top can increase the water flow rate of the coolant, thereby increasing the cooling effect of the cooling water on the urethral surface wall. The inner wall of the catheter connection ring 52 is provided with a first isolation groove 521 connected to the cooling guide groove 54, and one end of the catheter 6 is provided with a second isolation groove 61 adapted to the first isolation groove 521. One end of the catheter 6 is sleeved on the inner wall of the catheter connection ring 52, and the second isolation groove 61 corresponds to the position of the first isolation groove 521. The second isolation groove 61 and the first isolation groove 521 are used to connect the water inlet chamber 21 with the water outlet chamber 23, so that the cooling water in the water outlet chamber 23 can flow into the water outlet chamber 23.

[0052] like Figures 5 to 7 As shown, the guide structure 4 includes a top surface fixedly connected to the second isolation groove 61 and the first isolation groove 521, one end of the first reducer 41 is fixedly connected to the isolation tube 42, and the end of the isolation tube 42 away from the first reducer 41 is fixedly connected to the second reducer 43, wherein the first reducer 41 and the second reducer 43 are funnel-shaped structures of the same size and shape, and the isolation tube 42 is a hollow cylindrical structure for connecting the first reducer 41 and the second reducer 43, and the end of the first reducer 41 with a larger diameter is fixed to the top surface of the second isolation groove 61 and the first isolation groove 521, thereby converting the first reducer 41 into the only outlet for the urinary catheter 6 to discharge urine, and the surface wall of the end with a larger diameter of the second reducer 43 is fixedly connected to the inner surface wall of the water inlet chamber 21, so that the inlet of the water inlet chamber 21 can only be passed through the second reducer 43.

[0053] The surface wall of the isolation tube 42 is provided with four isolation chutes 421 distributed at 90 degrees to each other, and a closed groove 422 is provided on the top of the isolation chute 421. The isolation chute 421 is used to provide a sliding space for the limiting unit 72. At the same time, the closed groove 422 can increase the airtightness between the limiting unit 72 to prevent cooling water from entering the bladder through the gap between the isolation component 7 and the isolation tube 42. The surface wall of the second reducer 43 is provided with a plurality of urine outlet strip grooves 431 distributed in an annular manner. The urine outlet strip grooves 431 provide a urine outlet for urination, and also provide a channel for the passage of cooling water. A sliding rod 46 is fixedly connected between the two ends of the isolation chute 421. The sliding rod 46 provides a sliding track for the isolation component 7, so that when the isolation component 7 is impacted by cooling water, it moves along the direction of the sliding rod 46. The urine outlet strip groove 431 is fixedly connected to one end of the isolation tube 42, and one end of the plurality of guide strips 44 is fixedly connected to the guide strip 44. The guide grooves 441 are provided on both sides. The eversion amplitude of the guide strips 44 is greater than the bending amplitude of the second reducer 43, so that the cooling water passing through the second reducer 43 is first released from the guide strips 44 when passing through the urine outlet strip grooves 431, and the cooling water will move along the guide grooves 441 toward the isolation tube 42. The flow rate of the cooling water passing through the surface can be increased through the arc-shaped guide grooves 441. The end of the guide strips 44 away from the isolation tube 42 is fixedly connected to the urine guide ring 4 5. The urinary guide ring 45 can guide the urine flowing out of the isolation chute 421 so that it can slide along the arc-shaped inner wall surface of the urinary guide ring 45 to the urine outlet strip groove 431. The bottom end of the urinary guide ring 45 is fixedly connected to the outer wall of the second reducer 43. The urinary guide ring 45 is in an outward-turned structure opposite to the turning direction of the urinary guide ring 45. The bottom of the urinary guide ring 45 is fixedly connected to the surface of the second reducer 43, and the outer wall of the urinary guide ring 45 is fixedly connected to the surface wall of the water inlet chamber 21.

[0054] When urine in the bladder needs to be discharged, the isolation component 7 is opened, and the urine is discharged from the first reducer 41 through the catheter 6. The urine flows out through the isolation chute 421 and then discharged into the water inlet cavity 21 through the urine outlet strip groove 431. The guide structure 4 is an integrally molded structure by die-casting. The integrally molded guide structure 4 and the integrally molded process can improve product performance, reduce weight, reduce costs, and improve production efficiency.

[0055] like Figures 8 to 10As shown, the isolation assembly 7 includes four limiting units 72 slidably connected to the slide rod 46, the limiting units 72 are used to close and isolate the isolation chute 421, so that the first reducer 41 and the second reducer 43 are closed, the inner surface walls of the four limiting units 72 are fixedly connected with a cone disk 71, the cone disk 71 is a conical structure with the cone facing the urinary catheter 6, the concave surface of the cone disk 71 of the conical structure is used to guide the cooling water, so that the cooling water passing through the surface of the cone disk 71 is guided out of the isolation chute 421, and then passes through the isolation chute 421 and enters the water outlet cavity 23, the convex surface of the cone disk 71 is used to guide the urine discharged from the bladder, so that the urine is diverted out of the isolation chute 421, and the urine passing through the isolation chute 421 will be discharged from the urine outlet strip groove 431 on the second reducer 43.

[0056] The limiting unit 72 includes a second mounting bar 726 fixedly connected to the surface wall of the cone disk 71, and the two ends of the second mounting bar 726 are fixedly connected to the connecting pieces 727, and the ends of the two connecting pieces 727 away from the second mounting bar 726 are fixedly connected to the first mounting bar 722, and the second mounting bar 726 and the first mounting bar 722 are integral brackets. The second mounting bar 726 and the first mounting bar 722 are fixed by the connecting pieces 727 installed at both ends, and are used to install the first expansion membrane 725 and the second expansion membrane 721. The second mounting bar 726 and the connecting piece 727 are fixedly connected to the first expansion membrane 725 and the second expansion membrane 721. The bottom ends of the two elastic sheets 723 are fixedly connected with an outward-turned elastic sheet 723, and the thickness of the elastic sheet 723 gradually changes from thin to thick from the middle to the two sides. The bottom ends of the two elastic sheets 723 are fixedly connected with a first expansion membrane 725, and the second installation bar 726, the first installation bar 722, the elastic sheet 723 and the second expansion membrane 725 are fixedly connected with the second expansion membrane 721 on both side surfaces. The first installation bar 722 and the second installation bar 726 are provided with sliding holes that are compatible with the sliding rod 46, and the limiting unit 72 is slidably connected with the isolation tube 42 through the sliding hole and the sliding rod 46.

[0057] When the urethra is circulated and cooled, cooling water enters the second reducer 43 from the water inlet chamber 21. The cooling water accelerates after passing through the inner diameter of the second reducer 43 and impacts the cone disk 71 on the isolation assembly 7. When the cone disk 71 is impacted, the limiting unit 72 fixedly connected to the cone disk 71 will slide along the inside of the isolation chute 421. During sliding, the sliding holes provided on the first mounting bar 722 and the second mounting bar 726 slide on the sliding rod 46 until the second mounting bar 726 and the first mounting bar 722 slide to one end of the isolation chute 421 close to the first reducer 41, and the elastic sheet 723 and the first expansion membrane 725 connected thereto will enter the inside of the closed groove 422. At this time, the cone disk 71 and the limiting unit 72 reach the target position, thereby closing the first reducer 41 through the cone disk 71 and the limiting unit 72 to prevent cooling water from flowing into the urinary catheter 6 through the first reducer 41.

[0058] At the same time, cooling water is continuously injected, and the cooling water will enter between the second mounting bar 726 and the first mounting bar 722 and contact the first expansion membrane 725. The first expansion membrane 725 is squeezed by the cooling water, which will drive the elastic sheet 723 to deform until it fits with the closed groove 422, thereby maintaining the limit between the limit unit 72 and the closed groove 422 through the continuous cooling water squeezing force. The cooling water will also squeeze the second expansion membrane 721, causing the second expansion membrane 721 to expand slightly and contact the surfaces at both ends of the closed groove 422 to assist in the sealing process. When the cooling cycle is completed, the cooling water inside the water outlet cavity 23 and the water inlet cavity 21 is discharged. At this time, the first expansion membrane 725 and the second expansion membrane 721 have no cooling water. After the squeezing force of the cooling water is eliminated, the second expansion membrane 721 shrinks to its initial position, and the first expansion membrane 725 recovers its initial position under the elastic restoring force of the elastic sheet 723, thereby releasing the limit between the first expansion membrane 725 and the closed groove 422. When urination is required, urine is discharged from the urinary catheter 6 into the first reducer 41. The urine passing through the first reducer 41 will impact the cone disk 71, causing the entire isolation assembly 7 to slide on the slide rod 46 and slide to a position close to the second reducer 43, thereby exposing the isolation chute 421, so that the urine inside the first reducer 41 can flow out of the isolation chute 421, and the urine flowing out of the isolation chute 421 will slide along the arc-shaped surface wall of the second reducer 43 until it is discharged from the urine outlet strip groove 431.

[0059] The present invention also provides a method for using a cooling catheter in a transperineal prostate ablation procedure, comprising the following steps:

[0060] S1. Before a prostate ablation operation is required, the tube head structure 3 is inserted from the urethra until it enters the bladder;

[0061] S2, filling the airbag joint 12 with water, the water flows through the airbag cavity 22, the connection port 511 and the airbag water port 312 in sequence until it enters the airbag groove 311. During the continuous water filling process, the water inside the airbag groove 311 will slowly prop up the airbag 32 until the airbag 32 expands to a preset range;

[0062] S3, the water inlet cavity 21 is filled with cooling water, and the cooling water flows through the water inlet cavity 21 to the guide structure 4. The cooling water passing through the guide structure 4 will impact the isolation component 7, thereby closing the port of the urinary catheter 6. The cooling water passing through the guide structure 4 will flow into the water outlet cavity 23 inside the connecting structure 5, thereby cooling the urethra surface wall contacted by the outer wall of the tube body 2;

[0063] S4. After the prostate ablation surgery is completed, the urine in the bladder needs to be assisted to be discharged for a certain period of time. When the urine needs to be discharged, the urine in the bladder is discharged into the catheter 6 through the tube head structure 3. The urine in the catheter 6 will squeeze the isolation component 7, so that the guide structure 4 is connected with the tube body 2, so that the urine can flow into the water inlet cavity 21, and then the urine is discharged.

[0064] The working principle of the technical solution provided by the present invention is as follows:

[0065] When a prostate ablation operation is required, the tube head structure 3 is inserted from the urethra until it enters the bladder. At this time, the tube body 2 is inside the urethra, and the airbag joint 12 is filled with water. The water flows through the airbag cavity 22, the connecting port 511 and the airbag water outlet 312 in sequence until it enters the airbag groove 311. During the continuous water filling process, the water inside the airbag groove 311 will slowly prop up the airbag 32 until the airbag 32 expands, thereby restricting the tube head structure 3 in the bladder, and then the water inlet cavity 21 is filled with cooling water, and the cooling water passes through the water inlet cavity 21 to the guide structure 4.

[0066] The cooling water enters the second reducer 43 from the water inlet chamber 21. The cooling water accelerates after passing through the inner diameter of the second reducer 43 and impacts the cone disk 71 on the isolation assembly 7. When the cone disk 71 is impacted, the limiting unit 72 fixedly connected to the cone disk 71 will slide along the inside of the isolation chute 421. During sliding, the sliding holes provided on the first mounting bar 722 and the second mounting bar 726 slide on the sliding rod 46 until the second mounting bar 726 and the first mounting bar 722 slide to one end of the isolation chute 421 close to the first reducer 41, and the elastic sheet 723 and the first expansion membrane 725 connected thereto will enter the inside of the closed groove 422. At this time, the cone disk 71 and the limiting unit 72 reach the target position, so that the first reducer 41 is The tube 41 is closed, and cooling water is continuously injected at the same time. The cooling water will enter between the second mounting bar 726 and the first mounting bar 722 and contact the first expansion membrane 725. The first expansion membrane 725 is squeezed by the cooling water, which will drive the elastic sheet 723 to deform until it fits with the closed groove 422, thereby maintaining the limit between the limit unit 72 and the closed groove 422 through the continuous cooling water squeezing force. The cooling water will also squeeze the second expansion membrane 721, causing the second expansion membrane 721 to expand slightly and contact the surfaces at both ends of the closed groove 422 to assist in the sealing process, thereby forming a passage between the water inlet chamber 21 and the water outlet chamber 23, and the cooling water forms a cycle under the operation of the external cooling water circulation structure, thereby cooling the inner wall of the urethra.

[0067] After the prostate ablation surgery is completed, it is necessary to assist the discharge of urine inside the bladder for a certain period of time. When urine discharge is required, the urine inside the bladder is discharged into the catheter 6 through the tube head structure 3, and the urine is discharged from the catheter 6 into the first reducer 41. The urine passing through the first reducer 41 will impact the cone disk 71, causing the entire isolation assembly 7 to slide on the slide rod 46 and slide to a position close to the second reducer 43, thereby exposing the isolation chute 421, so that the urine inside the first reducer 41 can flow out from the isolation chute 421, and the urine flowing out of the isolation chute 421 will slide along the arc-shaped surface wall of the second reducer 43 until it is discharged from the urine outlet strip groove 431, so that the urine can flow into the water inlet cavity 21, and then the urine is discharged, thereby serving as a three-chamber urinary catheter.

[0068] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0069] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A cooling catheter for use in transperineal prostate ablation, characterized in that: include: A tube body, wherein the two ends of the tube body are respectively connected with a joint structure and a connecting structure, the inner surface wall of the connecting structure is sleeved with a urinary catheter, the outer surface wall of the urinary catheter is sleeved with a tube head structure, and the tube head structure is fixedly connected to the end opposite to the connecting structure, and the interior of the tube body is provided with a penetrating water inlet cavity, an air bag cavity and a water outlet cavity; A guide structure, the guide structure is arranged at a connection position between the tube body and the connection structure, and is connected to the tube body and the connection structure, and the guide structure is used to guide the cooling water passing through the water inlet cavity and the urine in the urinary catheter; An isolation component, which is arranged inside the guide structure and connected thereto, and is used to temporarily close and open the connection structure and the urinary catheter connection position; The connection structure includes a connecting ring tube fixedly connected to one end of the tube body, the connecting ring tube is adapted to the shape of the water outlet cavity, both ends of the connecting ring tube are fixedly connected with closing blocks adapted to the port surface thereof, a penetrating connecting port is provided on the closing block, an inner surface wall of the connecting ring tube is fixedly connected with a urinary catheter connecting ring, a cooling guide groove with a top convex outward is provided between the urinary catheter connecting ring and the connecting ring tube, a first isolation groove connected to the cooling guide groove is provided on the inner wall of the urinary catheter connecting ring, a second isolation groove adapted to the first isolation groove is provided at one end of the urinary catheter, one end of the urinary catheter is sleeved on the inner surface wall of the urinary catheter connecting ring, and the second isolation groove corresponds to the position of the first isolation groove.

2. The cooling catheter for transperineal prostate ablation according to claim 1, characterized in that: The joint structure comprises a cooling water outlet head fixedly connected to one end of the tube body and connected to the water outlet cavity, the inner wall of the cooling water outlet head is wrapped with a cooling water inlet head connected to the water inlet cavity, and one end of the tube body is connected to an airbag joint connected to the airbag cavity; The water inlet cavity is opened at the center of the tube body, the water outlet cavity is 300° ring-shaped and surrounds the outside of the water inlet cavity, and the air bag cavity is opened at both ends of the water outlet cavity.

3. The cooling catheter for transperineal prostate ablation according to claim 1, characterized in that: The tube head structure includes an airbag tube fixedly connected to one side of the connecting structure, an outer wall of the airbag tube is provided with an airbag groove, and a penetrating airbag water outlet is provided on the surface of the airbag groove, the airbag water outlet and the connecting port are connected to the airbag cavity, airbags are fixedly connected to both ends of the airbag groove, and a urinary catheter is fixedly connected to one end of the airbag tube.

4. The cooling catheter for transperineal prostate ablation according to claim 1, characterized in that: The guiding structure comprises a first reducer fixedly connected to the second isolation groove and the top surface of the first isolation groove, one end of the first reducer is fixedly connected to the isolation tube, the end of the isolation tube away from the first reducer is fixedly connected to the second reducer, the surface wall of the isolation tube is provided with four isolation chutes distributed at 90° to each other, the top of the isolation chute is provided with a closed groove, and the surface wall of the second reducer is provided with a plurality of urine outlet strip grooves distributed in a ring shape.

5. The cooling catheter for transperineal prostate ablation according to claim 4, characterized in that: A slide rod is fixedly connected between the two ends of the isolation chute, a guide strip is fixedly connected to one end of the urine outlet strip groove close to the isolation tube, a guide groove is opened on one side of several guide strips, a urine guide ring is fixedly connected to one end of several guide strips away from the isolation tube, the bottom end of the urine guide ring is fixedly connected to the outer wall of the second reducer, the urine guide ring is in an outward-turned structure opposite to the turning direction of the urine guide ring, and the guide structure is an integrally formed structure by die-casting.

6. The cooling catheter for transperineal prostate ablation according to claim 5, characterized in that: The isolation assembly comprises four limiting units slidably connected to the sliding rod, the inner surface walls of the four limiting units are fixedly connected with cone disks, and the cone disks are cone-shaped structures with the cones facing the urinary catheter.

7. The cooling catheter for transperineal prostate ablation according to claim 6, characterized in that: The limiting unit includes a second mounting bar fixedly connected to the surface wall of the cone disk, both ends of the second mounting bar are fixedly connected to connecting pieces, one end of the two connecting pieces away from the second mounting bar is fixedly connected to the first mounting bar, the bottom ends of the second mounting bar and the connecting piece are fixedly connected to an elastic piece in an outward-turned shape, the bottom ends of the two elastic pieces are fixedly connected to a first expansion membrane, and the second mounting bar, the first mounting bar, the elastic piece and the second expansion membrane are fixedly connected to both side surfaces of the first expansion membrane.

8. The cooling catheter for transperineal prostate ablation according to claim 7, characterized in that: The thickness of the elastic sheet gradually changes from thin to thick from the middle to both sides. The first mounting bar and the second mounting bar are both provided with sliding holes adapted to the sliding rod. The limiting unit and the isolation tube are slidably connected through the sliding holes and the sliding rod.

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