A prostate intracavitary thermal therapy catheter

Abstract

One object of the present invention is to provide a prostate intracavitary thermal therapy catheter, which can adaptively adjust the size of a heating balloon according to the inner diameter of the patient's urethra. The prostate intracavitary thermal therapy catheter for achieving the aforementioned object includes a tube body, a positioning balloon and a thermal therapy balloon. The tube body has a first balloon lumen, a reflux lumen and a wiring lumen. The positioning balloon is arranged on the outside of the tube body and is connected to the first balloon lumen, and gas or liquid can be filled into the positioning balloon from the first balloon lumen. The thermal therapy balloon is arranged on the outside of the tube body, and a thermal therapy component is arranged inside, and wiring connecting the thermal therapy component is arranged in the wiring lumen. Among them, the reflux lumen connects the positioning balloon and the thermal therapy balloon, and the filled gas or liquid circulates between the positioning balloon and the thermal therapy balloon through the reflux lumen to maintain the pressure balance between the positioning balloon and the thermal therapy balloon, so that the thermal therapy balloon is filled and expanded to a size suitable for fitting with the inner wall of the urethra.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a prostate intracavitary thermal therapy catheter. Background Art

[0002] Prostatitis is a common and frequently occurring disease in men. Currently, the treatment of male prostate hyperplasia and prostatitis usually adopts intracavitary thermotherapy or oral medication. Intracavitary thermotherapy is a thermotherapy treatment method that inserts the thermotherapy catheter used for treatment into the patient's urethra to the bladder, positions the thermotherapy capsule at the prostate, and uses physical methods to heat the affected area. It gradually shrinks the hyperplastic area and controls inflammation, thereby alleviating and relieving the patient's symptoms and pain.

[0003] The existing thermal therapy method is to insert a urethral catheter into the patient and place a heating balloon at the affected area, inject a certain amount of saline into the heating balloon, and then heat the saline through the radio frequency circuit inside the balloon to make the balloon hot, thereby achieving the purpose of thermal therapy of the affected area.

[0004] However, the inventors have discovered that due to different degrees of prostate hyperplasia or inflammation, the degree of urethral stenosis in patients varies, or due to different heights or physiological structures of patients, the inner diameter of the urethra cavity varies. When the heating balloon on the thermal therapy catheter is inserted into the patient's urethra, patients with more severe prostate hyperplasia or inflammation and severe urethral stenosis often feel uncomfortable due to the pressure of the heating balloon. For patients with relatively large urethral inner diameters, the heating balloon may not be able to fit tightly against the inner wall of the urethra, thus affecting the treatment effect. Summary of the invention

[0005] One object of the present invention is to provide a prostate intracavitary thermal therapy catheter, which can adaptively adjust the size of a heating balloon according to the inner diameter of the patient's urethra.

[0006] A prostate intracavitary thermal therapy catheter for achieving the aforementioned purpose comprises:

[0007] The tube body has a plurality of inner lumens inside, wherein the inner lumens include a first balloon lumen, a reflux lumen and a wiring lumen;

[0008] A positioning balloon is arranged outside the tube body and communicated with the first balloon cavity. Gas or liquid can be filled into the positioning balloon from the first balloon cavity to make the positioning balloon filled, expanded and positioned at the bladder opening; and

[0009] A thermotherapy balloon is arranged outside the tube body and communicated with the wiring cavity, a thermotherapy component is arranged inside the balloon, and wiring connected to the thermotherapy component is arranged inside the wiring cavity;

[0010] Among them, the reflux cavity connects the positioning balloon and the thermotherapy balloon, and the filled gas or liquid flows between the positioning balloon and the thermotherapy balloon through the reflux cavity to maintain the pressure balance between the positioning balloon and the thermotherapy balloon, so that the thermotherapy balloon is filled and expanded to a size suitable for fitting with the inner wall of the urethra.

[0011] In one or more embodiments, a guide head and a rear end component are respectively provided at both ends of the tube body, the guide head is used to guide the catheter to be inserted into the urethra, and the rear end component provides a plurality of interfaces, including a first balloon cavity interface and a connecting plug;

[0012] The first balloon cavity interface is connected to the positioning balloon through the first balloon cavity, so as to inject gas or liquid into the positioning balloon through the first balloon cavity interface, and a one-way valve is arranged at the first balloon cavity interface;

[0013] The connection plug is connected to the wiring in the wiring cavity, and the reflux cavity and the back-end component are blocked.

[0014] In one or more embodiments, the inner cavity further comprises a urinary catheter lumen, the guide head has a urinary catheter port, the interface in the rear-end component comprises a urinary catheter lumen port, and the urinary catheter port is connected to the urinary catheter lumen port through the urinary catheter lumen.

[0015] In one or more embodiments, the thermal therapy catheter further includes a closed balloon, and the positioning balloon, the thermal therapy balloon, and the closed balloon are sequentially arranged from the guide head toward the rear end component;

[0016] The inner lumen also includes a second balloon lumen, the interface in the rear-end assembly includes a second balloon lumen interface, the second balloon lumen interface is connected to the closed balloon through the second balloon lumen, a one-way valve is provided at the second balloon lumen interface, gas or liquid is injected into the closed balloon through the second balloon lumen interface to fill and expand the closed balloon;

[0017] The inflated positioning balloon and the sealing balloon respectively seal the urethra to form a closed cavity at the affected part of the urethra, and the thermal therapy balloon performs thermal therapy on the affected part at the closed cavity.

[0018] In one or more embodiments, a liquid medicine outlet is provided on the tube wall of at least one side of the thermotherapy balloon, the inner cavity further comprises a liquid medicine lumen, the interface in the rear end component further comprises a liquid medicine lumen interface, and a one-way valve is provided at the liquid medicine lumen interface;

[0019] The medicine inner cavity is connected to the medicine outlet and the medicine inner cavity interface, so as to allow the medicine to be transported into the closed cavity through the medicine inner cavity interface.

[0020] In one or more embodiments, the drug liquid outlets are respectively opened on the tube walls on both sides of the thermal therapy balloon.

[0021] In one or more embodiments, the thermal therapy assembly includes a plurality of heating units and at least one temperature measuring unit;

[0022] Each of the heating units comprises a radio frequency electrode ring sleeved on the outside of the tube body and a radio frequency wire, wherein the radio frequency wire connects the plug and the radio frequency electrode ring;

[0023] The temperature measuring unit comprises a temperature measuring electrode ring sleeved on the outside of the tube body and a temperature measuring wire, and the temperature measuring wire connects the plug and the temperature measuring electrode ring.

[0024] In one or more embodiments, the thermal therapy assembly further includes a heat transfer electrode ring sleeved on the outside of the tube body, and the heat transfer electrode ring and the radio frequency electrode ring are both distributed on the outside of the tube body in the thermal therapy balloon.

[0025] In one or more embodiments, the thermal therapy balloon has a wall thickness no greater than that of the positioning balloon.

[0026] In one or more embodiments, after the wiring is laid in the wiring cavity, the wiring cavity is sealed with silicone.

[0027] The improved effects of the present invention include one or a combination of the following:

[0028] 1) By setting a reflux cavity connecting the thermotherapy ball and the positioning balloon in the catheter, the internal pressure of the thermotherapy balloon and the positioning balloon is balanced, thereby ensuring that when the catheter is inserted into a urethra with different inner diameters, the pressure of the urethral inner wall on the thermotherapy balloon can be used to adjust the size of the thermotherapy balloon according to different urethral inner diameters, thereby achieving adaptive size adjustment of the thermotherapy balloon in the patient's urethra.

[0029] 2) A heat transfer electrode ring is provided in the thermotherapy balloon so that the fluid in the thermotherapy balloon can be heated more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0031] Figure 1 A schematic diagram of an embodiment of a prostate intracavitary thermal therapy catheter is shown;

[0032] Figure 2 for Figure 1 Schematic diagram of the cross section along the AA direction;

[0033] Figure 3 for Figure 2 Schematic cross-sectional view along direction BB;

[0034] Figure 4 Shows Figure 3 A partial enlarged schematic diagram of the middle E part;

[0035] Figure 5 Shows Figure 2 Schematic cross-sectional view along the DD direction;

[0036] Figure 6 for Figure 2 Schematic cross-sectional view along CC direction. DETAILED DESCRIPTION

[0037] The following discloses a variety of different implementation methods or embodiments of the subject technical solution. To simplify the disclosure, specific examples of each element and arrangement are described below. Of course, these are only examples and are not intended to limit the scope of protection of the present application. For example, the first feature subsequently recorded in the specification is formed above or on the second feature, which may include an implementation method in which the first and second features are formed by direct connection, and may also include an implementation method in which an additional feature is formed between the first and second features, so that the first and second features may not be directly connected. In addition, the figure marks and / or letters may be repeated in different examples in these disclosures. This repetition is for simplicity and clarity, and does not itself represent the relationship between the various implementation methods and / or structures to be discussed. Further, when the first element is described in a manner connected or combined with the second element, the description includes an implementation method in which the first and second elements are directly connected or combined with each other, and also includes the use of one or more other intervening elements to indirectly connect or combine the first and second elements.

[0038] It should be noted that, when used, the terms up, down, left, right, front, back, top, bottom, positive, negative, clockwise and counterclockwise in the following description are used only for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or direction between various parts of an object.

[0039] It should be noted that these and other subsequent drawings are only examples, are not drawn in accordance with the conditions of equal proportion, and should not be used as a limitation on the actual protection scope of the present invention. In addition, the transformation methods under different embodiments can be appropriately combined.

[0040] Without solving one or more problems existing in the above-mentioned prior art, the present invention provides a prostate intracavitary thermal therapy catheter, such as Figure 1 A schematic diagram of an embodiment of a prostate intracavitary thermal therapy catheter is shown. Figure 2 for Figure 1 Schematic diagram of the cross section along the AA direction.

[0041] Please refer to Figure 1 as well as Figure 2 The intracavitary thermal therapy catheter for prostate comprises: a tube body 1, a positioning balloon 2 and a thermal therapy balloon 3.

[0042] The tube body 1 has a plurality of inner cavities, such as Figure 2 As shown, the inner cavity includes a first balloon cavity 11, a reflux cavity 12 and a wiring cavity 13. The plurality of inner cavities may be as follows Figure 2 As shown, the tube body 1 is separated by a plurality of inner wall bodies 100 arranged and extending inside the tube body 1. A plurality of inner cavities are surrounded by the plurality of inner wall bodies 100.

[0043] The positioning balloon 2 is arranged on the outer peripheral side of the tube body 1 and communicates with the first balloon cavity 11. Specifically, it can be as follows Figure 1 As shown, a positioning balloon opening 20 is opened on the outer wall of the tube body 1, so that the interior of the positioning balloon 2 is connected with one end of the first balloon cavity 11 through the positioning balloon opening 20. When gas or liquid is introduced into the other end of the first balloon cavity 11, the gas or liquid can be filled into the positioning balloon 2 from the first balloon cavity 11, and the interior of the positioning balloon 2 is filled with fluid and expanded, so that the tube body 1 is positioned at the bladder opening by the positioning balloon 2 in an expanded state.

[0044] In some other embodiments different from those shown in the figures, the connection mentioned in one or more embodiments of the present invention may have many suitable deformations or changes, but is not limited thereto. For example, in the connection between the first balloon lumen 11 and the positioning balloon 2, the first balloon lumen 11 may have a thin tube extending out of the outer wall of the tube body, and the positioning balloon 2 is connected to the first balloon lumen 11 through the thin tube. The connection mentioned in one or more embodiments described below may also adopt the same or equivalent method, so it will not be repeated.

[0045] Please continue to refer to the attached drawings. The thermotherapy balloon 3 is arranged on the outer peripheral side of the tube body 1 and is connected to the wiring cavity 13. A thermotherapy component is arranged inside the thermotherapy balloon 3. The thermotherapy component is used to generate heat in the thermotherapy balloon 3 to achieve thermotherapy of the patient's lesion. Among them, the wiring cavity 13 is provided with wiring connected to the thermotherapy component. Specifically, it can be as follows Figure 1 As shown, a wiring opening 30 is opened on the outer wall of the tube body 1 , and the wiring enters into the wiring cavity 13 through the wiring opening and extends along the wiring cavity 13 .

[0046] The reflux cavity 12 is connected between the positioning balloon 2 and the thermotherapy balloon 3, and the gas or liquid filled into the positioning balloon 2 flows between the positioning balloon 2 and the thermotherapy balloon 3 through the reflux cavity 12, thereby maintaining the pressure balance between the positioning balloon 2 and the thermotherapy balloon 3, so that the thermotherapy balloon 3 is filled to a size suitable for fitting with the inner wall of the urethra. Specifically, it can be as follows Figure 1 As shown, a reflux lumen outlet 121 and a reflux lumen inlet 122 are respectively opened on the outer wall of the tube body 1. The reflux lumen inlet 122 is connected to the lumen of the thermal therapy balloon 3, and the reflux lumen outlet 121 is connected to the lumen of the positioning balloon.

[0047] Specifically, when the positioning balloon 2 is filled, the pressure inside the balloon increases. Since the positioning balloon 2 is connected to the thermotherapy balloon 3 through the reflux cavity 12, the fluid inside the positioning balloon 2 will release the pressure inside the thermotherapy balloon 3 from the reflux cavity outlet 121, so that the fluid flows into the thermotherapy balloon 3 from the reflux cavity inlet 122. When the thermotherapy balloon 3 is filled with fluid, the balloon surface slowly expands and can be closely attached to the mucosa of the affected part of the prostate. When the balloon surface is in close contact with the mucosa of the affected part, due to the compression of the mucosa on the outer wall of the thermotherapy balloon 3, internal pressure will be generated inside the thermotherapy balloon 3, gradually balancing the internal pressure of the positioning balloon 2 with the internal pressure of the thermotherapy balloon 3, so that the thermotherapy balloon 3 can be closely attached to the inner wall of the affected part of the urethra. At the same time, the positioning balloon 2 can also be filled and expanded, and the entrance of the urethra is closed.

[0048] In the existing thermal therapy catheter, the outer diameter of the heating balloon on the thermal therapy catheter inserted into the patient's urethra is not adjustable, that is, the catheter inserted into the patient's urethra has the same expansion force on the heating balloons of different urethral inner diameters, and the same pressure on the patient's urethral inner diameter. By setting a reflux cavity 12 connecting the thermal therapy balloon 3 and the positioning balloon 2 in the catheter, the internal pressure of the thermal therapy balloon 3 and the positioning balloon 2 is balanced, thereby ensuring that when the catheter is inserted into the urethra with different inner diameters, the pressure of the urethral inner wall on the thermal therapy balloon 3 is used to adjust the size of the thermal therapy balloon 3 according to different urethral inner diameters, thereby realizing adaptive size adjustment of the thermal therapy balloon 3 in the patient's urethra.

[0049] Although one embodiment of the prostate cavity thermal therapy catheter is described above, in other embodiments of the prostate cavity thermal therapy catheter, the prostate cavity thermal therapy catheter may have more details in many aspects relative to the above embodiment, and at least a part of these details may have various changes. At least a part of these details and changes will be described below with some embodiments.

[0050] Figure 3 for Figure 2 For a cross-sectional view along the BB direction, see Figures 1 to 3In one embodiment of the intracavitary thermal therapy catheter for the prostate, a guide head 4 and a rear end assembly 5 are respectively provided at both ends of the tube body 1. The guide head 4 is used to guide the catheter to be inserted into the patient's urethra, and the rear end assembly 5 is provided with multiple interfaces, including a first balloon cavity interface 51 and a connecting plug 52. The first balloon cavity interface 51 is connected to the positioning balloon 2 through the first balloon cavity 11, so that gas or liquid can be injected into the positioning balloon 2 through the first balloon cavity interface 51, wherein a one-way valve is provided at the first balloon cavity interface 51 to prevent fluid backflow. The connecting plug 52 is connected to the wiring in the wiring cavity 13, so that the thermal therapy component starts to heat by inserting the connecting plug 52 into a radio frequency thermal therapy device.

[0051] The reflux cavity 12 and the rear end component 5 are blocked, so that a self-balancing cavity is formed between the thermotherapy balloon 3 , the positioning balloon 2 and the reflux cavity 12 .

[0052] In some other embodiments different from the illustrated ones, the structural form of the prostate cavity thermal therapy catheter may also have many suitable deformations or changes, but it is not limited to this. For example, in one embodiment, the prostate cavity thermal therapy catheter may be provided with a guide component of other forms that is different from the guide head 4 in the figure to guide it into the patient's urethra. For example, in another embodiment, the rear end component 5 may not be integrally formed at the end of the tube body 1, but may be formed by connecting after separate manufacturing. For example, in yet another embodiment, a one-way valve may not be provided at the first balloon cavity interface 51, and the filling degree inside the balloon may be manually operated. For example, in yet another embodiment, the reflux cavity 12 is only provided between the thermal therapy balloon 3 and the positioning balloon 2, and does not extend toward the rear end component 5.

[0053] Please continue to see Figures 1 to 3 In one embodiment of the intracavitary thermal therapy catheter for prostate, the inner cavity further comprises a urinary catheter lumen 14, a urinary catheter port 40 is provided at the guide head 4, and the interface in the rear end component 5 comprises a urinary catheter lumen port 53, and the urinary catheter port 40 is connected to the urinary catheter lumen port 53 through the urinary catheter lumen 14 to achieve urination in the patient's urethra. In one embodiment, the urinary catheter lumen port 53 can be connected to an external urinary catheter bag or a fluid bag or other medical device to achieve urinary catheterization of the patient during treatment.

[0054] In one embodiment of the intracavitary thermotherapy catheter for prostate, the thermotherapy catheter further comprises a closed balloon 6. The positioning balloon 2, the thermotherapy balloon 3 and the closed balloon 6 are arranged in sequence from the guide head 4 to the rear end assembly 5 as shown in the figure, and the positioning balloon 2 is adjacent to the end where the guide head 4 is located. The closed balloon 6 is closer to the end where the rear end assembly 5 is located, and the thermotherapy balloon 3 is arranged between the positioning balloon 2 and the closed balloon 6.

[0055] The inner cavity also includes a second balloon cavity 15, and the interface in the rear end assembly 5 includes a second balloon cavity interface 54, which is connected to the closed balloon 6 through the second balloon cavity 15, and a one-way valve is also provided at the second balloon cavity interface 54 to prevent fluid backflow. Gas or liquid is injected into the closed balloon 6 through the second balloon cavity interface 54, so that the closed balloon 6 is filled with fluid and expanded.

[0056] The positioning balloon 2 and the sealing balloon 6 in the filled state expand and seal the urethra respectively, thereby forming a closed cavity at the affected part of the urethra, and the thermal therapy balloon 3 performs thermal therapy on the affected part at the closed cavity.

[0057] Please continue to see Figures 1 to 3 In one embodiment of the intracavitary thermotherapy catheter for prostate, a liquid medicine outlet 160 is provided on the tube wall of at least one side of the thermotherapy balloon 3, the inner cavity also includes a liquid medicine cavity 16, and the interface in the rear-end component 5 also includes a liquid medicine cavity interface 55, and a one-way valve is provided at the liquid medicine cavity interface 55 to prevent fluid backflow. The liquid medicine cavity 16 is connected to the liquid medicine outlet 160 and the liquid medicine cavity interface 55, so as to allow the liquid medicine to be delivered to the closed cavity between the positioning balloon 2 and the closing balloon 6 through the liquid medicine cavity interface 55, thereby realizing the function of delivering the liquid medicine to the thermotherapy site.

[0058] In one embodiment of the intracavitary thermotherapy catheter for prostate, the liquid medicine outlet 160 is provided on the tube wall on both sides of the thermotherapy balloon 3 as shown in the figure. In other embodiments different from the figure, the number and the location of the liquid medicine outlet 160 may have many suitable variations or changes, but are not limited thereto. For example, in one embodiment, the liquid medicine outlet 160 may be provided on only one side of the tube wall of the thermotherapy balloon 3. In another embodiment, the liquid medicine outlet 160 may be a plurality of liquid medicine outlets 160 provided on both sides of the thermotherapy balloon 3.

[0059] like Figure 4 Shows Figure 3 In the partially enlarged schematic diagram of the middle E part, the thermotherapy assembly of the thermotherapy balloon 3 includes multiple heating units and at least one temperature measuring unit. The heating unit includes a radio frequency electrode coil 31 and a radio frequency wire 32 sleeved on the outside of the tube body 1, and the temperature measuring unit includes a temperature measuring electrode coil 33 and a temperature measuring wire 34 sleeved on the outside of the tube body 1. The radio frequency wire 32 connects the radio frequency electrode coil 31 with the connecting plug 52, so that the radio frequency electrode coil 31 is powered on and generates heat through an external device. The temperature measuring wire 34 connects the temperature measuring electrode coil 33 with the connecting plug 52, so that the temperature measuring electrode coil 33 monitors the temperature inside the thermotherapy balloon 3 through powering on the external device.

[0060] Please continue to see Figure 4In one embodiment of the intra-prostate thermal therapy catheter, the thermal therapy component also includes a heat transfer electrode ring 35 sleeved on the outside of the tube body 1, and the heat transfer electrode ring 35 is used to uniformly transfer heat to the inside of the thermal therapy balloon 3, wherein the heat transfer electrode ring 35 and the radio frequency electrode ring 31 are evenly distributed in the thermal therapy balloon 3 along the extension direction of the tube body 1, thereby achieving uniform heat conduction to the fluid in the thermal therapy balloon 3.

[0061] In one embodiment of the intra-prostate thermal therapy catheter, the thermal therapy balloon 3 has a wall thickness no greater than that of the positioning balloon 2, so that when the positioning balloon 2 and the thermal therapy balloon 3 are inflated and expanded together and press against the inner wall of the urethra, since the thermal therapy balloon 3 has a thinner inner wall, the fluid in the thermal therapy balloon 3 exerts less pressure on the inner wall of the urethra than the positioning balloon 2, and heat is more easily transferred to the affected part of the urethra.

[0062] In one embodiment of the intracavitary thermal therapy catheter for the prostate, after the wiring is laid in the wiring cavity 13, the wiring cavity 13 is sealed with silica gel to achieve insulation.

[0063] In one embodiment of the prostate intracavitary thermal therapy catheter, the gas or liquid introduced in one or more embodiments described above is physiological saline.

[0064] Figure 5 Shows Figure 2 The cross-sectional view along the DD direction is shown in FIG. Figure 6 for Figure 2 Please refer to the cross-sectional view along the CC direction in Figures 1 to 6 .

[0065] As described above, the intra-prostate thermal therapy catheter in one or more embodiments can be applied to a thermal therapy device. During treatment, the proximal guide head 4 of the catheter is inserted from the patient's urethra until the positioning balloon 2 completely reaches the bladder. After that, physiological saline is injected through the one-way valve of the first balloon cavity interface 51 to fill the positioning balloon 2, and then the catheter is pulled outward until the positioning balloon 2 is positioned at the bladder opening. At this time, the thermotherapy balloon 3 has been placed in the patient's urethra prostate affected part. After the positioning balloon 2 is filled, the pressure inside the balloon increases. Since the positioning balloon 2 is connected to the thermotherapy balloon 3 through the reflux cavity 12, the saline in the positioning balloon 2 will automatically release the pressure inside the positioning balloon 2 from the reflux cavity outlet 121, so that the saline flows into the thermotherapy balloon 3 from the reflux cavity inlet 122. When the thermotherapy balloon 3 is filled with saline, the balloon surface slowly expands and can be close to the mucosa of the affected part of the prostate. As long as the balloon surface is close to the mucosa of the affected part, the internal pressure of the thermotherapy balloon 3 is generated, and the internal pressure of the positioning balloon 2 is gradually balanced with the internal pressure of the thermotherapy balloon 3, so that the thermotherapy balloon 3 can be close to the inner wall of the urethra affected part. At the same time, the saline is injected through the one-way valve of the second balloon cavity interface 54 to fill the closed balloon 6 to close the patient's urethra, so that the urethra affected part basically forms a closed cavity.

[0066] At this time, the connecting plug 52 is connected to the radio frequency thermal therapy device, and the heating unit in the thermal therapy component in the thermal therapy balloon 3 transmits the controllable radio frequency power output by the radio frequency thermal therapy device to the radio frequency electrode coil 31 through the connecting plug 52 and the radio frequency wire 32, and uses the physiological saline in the thermal therapy balloon 3 as a medium for electrical-thermal conversion; and the temperature measuring unit in the thermal therapy component transmits the measured real-time temperature to the radio frequency thermal therapy device through the temperature measuring wire 34, the temperature measuring electrode coil 33, and the connecting plug 52 to achieve real-time temperature control, so that the thermal therapy balloon 3 is maintained at a constant temperature, that is, thermal therapy is performed on the patient's lesion site.

[0067] At the same time, the medicine can be injected from the syringe interface of the medicine inner cavity interface 55, so that the medicine flows out from the medicine outlet 160 through the medicine inner cavity 16, and the medicine is retained in the closed area between the positioning balloon 2 and the closing balloon 6 around the thermal therapy balloon 3. The heated thermal therapy balloon 3 warms the medicine in the closed area to achieve the purpose of targeted thermal therapy of the medicine.

[0068] The improved effects of the present invention include one or a combination of the following:

[0069] 1) By setting a reflux cavity connecting the thermotherapy ball and the positioning balloon in the catheter, the internal pressure of the thermotherapy balloon and the positioning balloon is balanced, thereby ensuring that when the catheter is inserted into a urethra with different inner diameters, the pressure of the urethral inner wall on the thermotherapy balloon can be used to adjust the size of the thermotherapy balloon according to different urethral inner diameters, thereby achieving adaptive size adjustment of the thermotherapy balloon in the patient's urethra.

[0070] 2) A heat transfer electrode ring is provided in the thermotherapy balloon so that the fluid in the thermotherapy balloon can be heated more evenly.

[0071] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A prostate intracavitary thermal therapy catheter, characterized in that: include: The tube body has a plurality of inner lumens inside, wherein the inner lumens include a first balloon lumen, a reflux lumen and a wiring lumen; A positioning balloon is arranged outside the tube body and communicated with the first balloon cavity. Gas or liquid can be filled into the positioning balloon from the first balloon cavity, so that the positioning balloon is filled, expanded and positioned at the bladder opening; as well as A thermotherapy balloon is arranged outside the tube body and communicated with the wiring cavity. A thermotherapy component is arranged inside the thermotherapy balloon. Wiring connected to the thermotherapy component is arranged inside the wiring cavity. Among them, the reflux cavity connects the positioning balloon and the thermotherapy balloon, and the filled gas or liquid flows between the positioning balloon and the thermotherapy balloon through the reflux cavity to maintain the pressure balance between the positioning balloon and the thermotherapy balloon, so that the thermotherapy balloon is filled and expanded to a size suitable for fitting with the inner wall of the urethra.

2. The prostate intracavitary thermal therapy catheter according to claim 1, characterized in that: The two ends of the tube body are respectively provided with a guide head and a rear end component, the guide head is used to guide the catheter to be inserted into the urethra, and the rear end component provides a plurality of interfaces, including a first balloon cavity interface and a connecting plug; The first balloon cavity interface is connected to the positioning balloon through the first balloon cavity, so as to inject gas or liquid into the positioning balloon through the first balloon cavity interface, and a one-way valve is arranged at the first balloon cavity interface; The connection plug is connected to the wiring in the wiring cavity, and the reflux cavity and the back-end component are blocked.

3. The prostate intracavitary thermal therapy catheter according to claim 2, characterized in that: The inner cavity channel also includes a urinary catheterization cavity, the guide head is provided with a urinary catheterization port, the interface in the rear end component includes a urinary catheterization cavity interface, and the urinary catheterization port is connected with the urinary catheterization cavity interface through the urinary catheterization cavity.

4. The prostate intracavitary thermal therapy catheter according to claim 2, characterized in that: The thermal therapy catheter further includes a closed balloon, wherein the positioning balloon, the thermal therapy balloon and the closed balloon are sequentially arranged from the guide head toward the rear end component; The inner lumen also includes a second balloon lumen, the interface in the rear-end assembly includes a second balloon lumen interface, the second balloon lumen interface is connected to the closed balloon through the second balloon lumen, a one-way valve is provided at the second balloon lumen interface, gas or liquid is injected into the closed balloon through the second balloon lumen interface to fill and expand the closed balloon; The inflated positioning balloon and the sealing balloon respectively seal the urethra to form a closed cavity at the affected part of the urethra, and the thermal therapy balloon performs thermal therapy on the affected part at the closed cavity.

5. The prostate intracavitary thermal therapy catheter according to claim 4, characterized in that: A liquid medicine outlet is provided on the tube wall of at least one side of the thermotherapy balloon, the inner cavity also includes a liquid medicine cavity, the interface in the rear-end component also includes a liquid medicine cavity interface, and a one-way valve is provided at the liquid medicine cavity interface; The medicine inner cavity is connected to the medicine outlet and the medicine inner cavity interface, so as to allow the medicine to be transported into the closed cavity through the medicine inner cavity interface.

6. The prostate intracavitary thermal therapy catheter according to claim 5, characterized in that: The liquid medicine outlets are respectively opened on the tube walls on both sides of the thermal therapy balloon.

7. The prostate intracavitary thermal therapy catheter according to claim 2, characterized in that: The thermal therapy assembly includes a plurality of heating units and at least one temperature measuring unit; Each of the heating units comprises a radio frequency electrode ring sleeved on the outside of the tube body and a radio frequency wire, wherein the radio frequency wire connects the plug and the radio frequency electrode ring; The temperature measuring unit comprises a temperature measuring electrode ring sleeved on the outside of the tube body and a temperature measuring wire, and the temperature measuring wire connects the plug and the temperature measuring electrode ring.

8. The prostate intracavitary thermal therapy catheter according to claim 7, characterized in that: The thermal therapy component also includes a heat transfer electrode ring sleeved on the outside of the tube body, and the heat transfer electrode ring and the radio frequency electrode ring are both distributed on the outside of the tube body in the thermal therapy balloon.

9. The prostate intracavitary thermal therapy catheter according to claim 1, characterized in that: The thermal therapy balloon has a wall thickness no greater than that of the positioning balloon.

10. The prostate intracavitary thermal therapy catheter according to claim 1, characterized in that: After the wiring is laid in the wiring cavity, the wiring cavity is sealed with silica gel.

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