Disposable positioning and water injection cryoablation needle

Abstract

The invention belongs to the technical field of medical equipment, and particularly relates to a disposable positioning and water injection cryoablation needle which comprises an operation handle, a fixing part is arranged in the operation handle in a sliding mode, a needle body is arranged in the fixing part, and the fixing part can push the needle body out of or pull the needle body into the operation handle through sliding. The needle body comprises a butt joint seat, an outer wall, a flow guide column and a tip end, the butt joint seat is connected with the interior of the fixing part in an inserted mode, the upper end of the outer wall is fixedly connected with the interior of the butt joint seat, and the outer edge of the flow guide column is fixedly connected with the inner side of the outer wall. The needle body can be conveniently replaced and fixed, meanwhile, the spiral part in the needle body can increase the flowing time of gas, the freezing efficiency during argon circulation or the melting efficiency during helium circulation, more uniform ice balls can be formed through water injection of the needle body, and therefore tumor cells can be more effectively damaged.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a disposable positioning and water injection cryoablation needle. Background Art

[0002] With the progress of medical technology, the treatment of solid tumors has gradually shifted from traditional open surgery to a more precise and minimally invasive direction. According to data from the World Health Organization (WHO), there are more than 19 million newly diagnosed cancer cases globally each year, and solid tumors such as liver cancer, lung cancer, and prostate cancer account for more than 60%. Traditional surgical resection has problems such as large trauma, slow recovery, and many complications (such as bleeding and infection), especially for elderly patients or those with complications. Minimally invasive ablation techniques (such as radiofrequency, microwave, and cryoablation), due to their characteristics of "precision targeting, small trauma, and fast recovery", have become important clinical options. Among them, cryoablation destroys tumor cells through extremely low temperatures (below -40°C) and has a dual effect of "physical killing + immune activation", and is widely used in the fields of liver cancer, kidney cancer, etc.

[0003] Currently, most cryoablation needles and operating handles in minimally invasive ablation techniques are integrated. When the needle body needs to be replaced, the operation process is complex and time-consuming, seriously affecting the treatment efficiency. At the same time, in terms of water injection and refrigerant application, it is difficult to accurately control the amount and distribution of water injection, resulting in uneven ice balls formed at the affected area and unable to effectively freeze the target tissue; at the same time, the flow path and mode of argon and helium are not optimized enough, and their ability to absorb or release heat is limited, affecting the effect of freezing and melting tissues, increasing the treatment time and the difficulty of controlling treatment risks such as bursting of the affected tissue. Summary of the Invention

[0004] The purpose of the present invention is to provide a disposable positioning and water injection cryoablation needle, which can conveniently replace and fix the needle body. At the same time, the spiral part inside the needle body can increase the gas flow time, improve the freezing efficiency during argon circulation, or the melting efficiency during helium circulation. The water injection of the needle body can form a more uniform ice ball, thereby more effectively destroying tumor cells.

[0005] The technical solution adopted by the present invention is specifically as follows:

[0006] A disposable positioning and water injection cryoablation needle, including an operating handle, a fixing part is slidably arranged inside the operating handle, a needle body is arranged inside the fixing part, and the fixing part can push or pull the needle body into or out of the operating handle through sliding, and fix the needle body inside the operating handle through the fixing part:

[0007] The needle body includes a docking seat, an outer wall, a flow guiding column and a tip. The docking seat is inserted into the interior of the fixing part. The upper end of the outer wall is fixedly connected to the interior of the docking seat. The outer edge of the flow guiding column is fixedly connected to the inner side of the outer wall, and the interior of the flow guiding column is communicated with the interior of the docking seat. The upper end of the tip is threadedly connected to the lower end of the outer wall, and the interior of the tip is communicated with the lower end of the flow guiding column.

[0008] In a preferred embodiment, vertically arranged linear grooves are provided at the upper end of the flow guiding column, and there are four linear grooves.

[0009] In a preferred embodiment, spiral grooves are provided at the lower end of the flow guiding column, and there are four spiral grooves. The upper end of the spiral groove is communicated with the corresponding linear groove. Two adjacent spiral grooves of the four spiral grooves form a group, and the lower ends of a group of spiral air guiding grooves are communicated with each other to form an air guiding channel.

[0010] In a preferred embodiment, a water guiding groove is further provided inside the flow guiding column, and the lower end of the water guiding groove is communicated with the interior of the tip.

[0011] In a preferred embodiment, a drainage hole is provided inside the tip, and drainage grooves are provided on the outer edges of the outer wall and the tip. The interior of the drainage groove is matched with the drainage hole.

[0012] In a preferred embodiment, a micro thermocouple and an optical fiber temperature measurement unit are provided inside the tip.

[0013] In a preferred embodiment, developing scale lines are provided on the outer edges of the outer wall and the tip.

[0014] In a preferred embodiment, the fixing part includes a sliding seat, an elastic restoring member, a pull handle and a fixing cover. The sliding seat is slidably arranged inside the operating handle. The elastic restoring member is arranged between the sliding seat and the operating handle. The pull handle is fixedly connected to one side of the sliding seat and extends out of the interior of the operating handle. The fixing cover is arranged at the upper end of the operating handle and is threadedly connected to the operating handle. The lower end of the fixing cover is inserted into the upper end interior of the sliding seat.

[0015] In a preferred embodiment, an installation groove is provided inside the sliding seat, and five pipelines are provided inside the installation groove. Two of the five pipelines are for argon circulation, two are for helium circulation, and the last one is a water injection pipeline. The five pipelines are connected to the air guiding grooves and drainage grooves inside the corresponding flow guiding columns.

[0016] In a preferred embodiment, the lower end of the fixing cover is conical and is matched with the fixing groove inside the upper end of the sliding seat.

[0017] The technical effects achieved by the present invention are:

[0018] The present invention adopts the design of the fixing part and the needle body, and the fixing part is extended to insert the needle body into the inside of the fixing part to achieve the initial connection between the fixing part and the needle body, and then the fixing part drives the needle body to retract into the inside of the operating handle, so that the docking seat is fixed by the limit of the fixing part and the operating handle, thereby ensuring the stability of the doctor's operation; the fixing part is pushed out of the inside of the operating handle, so that the fixing part drives the needle body to move out of the inside of the operating handle, and then the needle body can be separated from the fixing part, and the needle body can be quickly replaced and installed, thereby improving the doctor's operation efficiency;

[0019] The present invention adopts a design of a fixing part. When the fixing part is extended, the fixing cover needs to be loosened first, and then the pull handle is pushed to make the sliding seat slide and extend inside the operating handle; when the fixing part is retracted, the pull handle is stopped, so that the sliding seat is squeezed by the elastic recovery member, so that the sliding seat is retracted into the inside of the operating handle, and then the fixing cover is tightened so that the fixing cover can be inserted into the inside of the sliding seat, and the sliding seat is squeezed by the screwing of the fixing cover to fix the sliding seat; the above operation process realizes the convenient operation of extending and retracting the sliding seat, thereby improving the doctor's operation efficiency and convenience;

[0020] The present invention adopts the design of a needle body, which is inserted into the affected part of the patient, and water is injected into the affected part through the inside of the guide column. The water injection is stopped after the water distribution in the affected part reaches the requirement, and then the doctor controls the argon gas or helium gas to circulate between the outer wall and the guide column, and cooperates with the spiral groove of the guide column to make the flow of argon gas or helium gas spiral. The spiral path can increase the flow time of the gas, so that the argon gas can better absorb the temperature of the surrounding tissue and accelerate the freezing efficiency. At the same time, the injected water can form a more uniform ice ball in the affected part, or the helium can better release more heat into the tissue to accelerate the melting efficiency of the tissue. Through multiple cycles of alternating hot and cold, the patient's affected tissue is burst to achieve the treatment purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall schematic diagram of an embodiment of the present invention;

[0022] Figure 2 is an overall exploded view of an embodiment of the present invention;

[0023] Figure 3 is an overall side sectional view of an embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of a sliding seat extending in an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of a needle body according to an embodiment of the present invention;

[0026] Figure 6It is the overall explosion diagram of the embodiment of the present invention;

[0027] Figure 7 It is the schematic diagram of the straight groove of the flow guide column in the embodiment of the present invention;

[0028] Figure 8 It is the schematic diagram of the spiral groove of the flow guide column in the embodiment of the present invention;

[0029] Figure 9 It is the cross-sectional view of the lower end of the needle body in the embodiment of the present invention.

[0030] In the attached drawings, the list of components represented by each label is as follows:

[0031] 1. Operating handle; 2. Fixed part; 201. Sliding seat; 202. Elastic restoring member; 203. Pull handle; 204. Fixed cover; 3. Needle body; 301. Docking seat; 302. Outer wall; 303. Flow guide column; 3031. Straight groove; 3032. Spiral groove; 3033. Water guide groove; 304. Tip. Detailed implementation manners

[0032] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be made in conjunction with the drawings in the specification.

[0033] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0034] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The phrase "in a preferred embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0035] Thirdly, the present invention is described in detail in conjunction with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0036] Please refer to Figures 1 to 9As shown in the figure, the present invention provides a disposable positioning and water injection cryoablation needle, which includes an operating handle 1. A fixing part 2 is slidably arranged inside the operating handle 1. A needle body 3 is arranged inside the fixing part 2. The fixing part 2 can push the needle body 3 out of or pull it into the inside of the operating handle 1 through sliding, and fix the needle body 3 inside the operating handle 1 through the fixing part 2:

[0037] The needle body 3 includes a docking seat 301, an outer wall 302, a diversion column 303 and a tip 304. The docking seat 301 is inserted into the inside of the fixing part 2. The upper end of the outer wall 302 is fixedly connected to the inside of the docking seat 301. The outer edge of the diversion column 303 is fixedly connected to the inner side of the outer wall 302, and the inside of the diversion column 303 is communicated with the inside of the docking seat 301. The upper end of the tip 304 is threadedly connected to the lower end of the outer wall 302, and the inside of the tip 304 is communicated with the lower end of the diversion column 303.

[0038] Specifically, when the device needs to be operated, first push the fixing part 2 out of the inside of the operating handle 1, then insert the docking seat 301 into the inside of the fixing part 2, and then slide the fixing part 2 into the inside of the operating handle 1, so that the docking seat 301 is fixed by the limiting of the fixing part 2 and the operating handle 1. Then tighten the fixing cover 204 of the fixing part 2 to completely fix the fixing part 2 inside the operating handle 1, improving the stability of the fixing part 2 and the needle body 3 inside the operating handle 1, so as to ensure the stability of the doctor's operation;

[0039] Then the doctor operates the device to inject water into the inside of the diversion column 303 to discharge the air inside the diversion column 303. Then the doctor controls the operating handle 1 to drive the needle body 3 to insert into the patient's affected area, and injects water into the affected area through the inside of the diversion column 303. After the water volume distribution in the affected area reaches the requirement, stop injecting water. Then the doctor controls argon or helium to circulate between the outer wall 302 and the diversion column 303. When argon circulates, it instantly drops the temperature of the tissue corresponding to the outer wall 302 to more than minus one hundred and seventy degrees Celsius, and freezes the corresponding injected water. At the same time, the injected water can form a more uniform ice ball in the affected area; when switching to helium, the tissue can be quickly reheated to more than twenty degrees Celsius in a very short time, melting the injected water; through multiple cycles of cold and heat alternation, the affected tissue of the patient bursts to achieve the treatment purpose;

[0040] After the treatment is over, the doctor controls the operating handle 1 to move the needle body 3 out of the patient's body, then loosen the fixing cover 204, and then the fixing part 2 can be pushed out of the inside of the operating handle 1, so that the fixing part 2 drives the needle body 3 to move out of the inside of the operating handle 1. Then the needle body 3 can be separated from the fixing part 2 to realize the quick replacement and installation of the needle body 3, thereby improving the doctor's operation efficiency.

[0041] Please refer to Figure 6 and Figure 7As shown, a vertical straight groove 3031 is provided at the upper end of the flow guide column 303. There are four straight grooves 3031. Through the straight grooves 3031, the shortest supply distance can be provided for the corresponding gas, realizing the rapid flow of the corresponding gas.

[0042] Please refer to Figure 8 Figure 9 As shown, a spiral groove 3032 is provided at the lower end of the flow guide column 303. There are four spiral grooves 3032. The upper end of the spiral groove 3032 is connected to the corresponding straight groove 3031. After the corresponding gas enters the inside of the spiral groove 3032, the spiral path can increase the flow time of the gas, enabling argon to better absorb the temperature of the surrounding tissue and accelerating the freezing efficiency, or enabling helium to better release more heat to the tissue to accelerate the tissue melting efficiency. Two adjacent ones of the four spiral grooves 3032 form a group. The lower ends of a group of spiral air guide grooves are interconnected to form an air guide channel, so that a group of spiral air guide grooves form a spiral gas circulation groove, enabling argon or helium to be spiral during the forward process and also spiral during the return process, further increasing the residence time of gas circulation, thereby ensuring the effect of freezing or melting tissue.

[0043] Please refer to Figures 7 to 9 As shown, a water guide groove 3033 is also provided inside the flow guide column 303. The lower end of the water guide groove 3033 is connected to the inside of the tip 304. Through the guidance inside the water guide groove 3033 for the injected water, the water flow can reach the inside of the tip 304 faster, enabling the water injection to react quickly and improving the operation accuracy of the doctor when injecting water.

[0044] Please refer to Figure 6 and Figure 9 As shown, a drainage hole is provided inside the tip 304, and diversion grooves are provided on the outer wall 302 and the outer edge of the tip 304. The inside of the diversion groove is matched with the drainage hole. After the tip 304 discharges water, the water flow flows through the inside of the diversion grooves at the outer wall 302 and the tip 304, enabling the water to be accurately discharged around the outer wall 302 and making the water distribution more uniform.

[0045] Please refer to Figure 9 As shown, a micro thermocouple and an optical fiber temperature measurement unit are provided inside the tip 304 to monitor the temperature change from -196°C to 50°C in real time. The data is transmitted to an external controller through the built-in wire, facilitating the doctor to more accurately understand the working condition of the needle body 3.

[0046] Please refer to Figure 5As shown, developing scale lines are provided on the outer wall 302 and the outer edge of the tip 304. The developing scale lines are coated with barium sulfate, which supports real-time CT / MRI positioning, provides a more accurate position of the needle body 3 for doctors, improves the accuracy during doctor's puncture, and ensures the effect of puncture positioning.

[0047] Please refer to Figures 1 to 4 As shown, the fixing part 2 includes a sliding seat 201, an elastic restoring member 202, a pull handle 203, and a fixing cover 204. The sliding seat 201 is slidably disposed inside the operating handle 1. The elastic restoring member 202 is disposed between the sliding seat 201 and the operating handle 1. The pull handle 203 is fixedly connected to one side of the sliding seat 201, and the pull handle 203 extends out of the inside of the operating handle 1. The fixing cover 204 is disposed at the upper end of the operating handle 1, and the fixing cover 204 is threadedly connected to the operating handle 1. The lower end of the fixing cover 204 is inserted into the upper end inside the sliding seat 201;

[0048] When performing an extending operation on the fixing part 2, it is necessary to first loosen the fixing cover 204, and then push the pull handle 203 to make the sliding seat 201 slide out inside the operating handle 1;

[0049] When performing a contracting operation on the fixing part 2, release the pulling of the pull handle 203, so that the sliding seat 201 is squeezed by the elastic restoring member 202, causing the sliding seat 201 to contract into the inside of the operating handle 1. Then tighten the fixing cover 204 so that the fixing cover 204 can be inserted into the inside of the sliding seat 201, and the sliding seat 201 is fixed by the screwing-in and squeezing of the fixing cover 204;

[0050] Through the above operation process, the convenient operation of the sliding seat 201 extending and contracting is realized, thereby improving the operation efficiency and convenience of doctors.

[0051] Please refer to Figure 2 As shown, an installation groove is formed inside the sliding seat 201. Five pipelines are provided inside the installation groove. The five pipelines are connected to an external supply device. Two of the five pipelines are for argon circulation, two are for helium circulation, and the last one is a water injection pipeline. The five pipelines are connected to the gas guiding grooves and the water guiding grooves inside the corresponding guide columns 303. After the needle body 3 is inserted into the inside of the sliding seat 201, argon, helium, and water are supplied to the pipelines by an external device. The gas and water flow provide channels for gas circulation and water injection into the gas guiding grooves and the water guiding grooves inside the guide column 303, so as to ensure that argon, helium, and water can be guided inside the guide column 303 to achieve circular flow and water discharge.

[0052] Please refer to Figure 3 and Figure 4As shown, the lower end of the fixed cover 204 is set to be conical, which is matched with the fixing groove inside the upper end of the sliding seat 201. When there is a certain deviation between the sliding seat 201 and the fixed cover 204, the inclined surface of the conical lower end of the fixed cover 204 can squeeze the inside of the sliding seat 201, so that the sliding seat 201 can be accurately aligned with the fixed cover 204, thereby further improving the fixing effect of the fixed cover 204 on the sliding seat 201.

[0053] The working principle of the present invention is as follows: When the device needs to be operated, first push the fixing part 2 out of the inside of the operating handle 1, then insert the docking seat 301 into the inside of the fixing part 2, and then slide the fixing part 2 into the inside of the operating handle 1, so that the docking seat 301 is fixed by the limit of the fixing part 2 and the operating handle 1. Then tighten the fixed cover 204 of the fixing part 2 to completely fix the fixing part 2 inside the operating handle 1, improving the stability of the fixing part 2 and the needle body 3 inside the operating handle 1, so as to ensure the stability of the doctor's operation.

[0054] Then the doctor operates the device to inject water into the inside of the guide column 303 to discharge the air inside the guide column 303. Then the doctor controls the operating handle 1 to drive the needle body 3 to insert into the patient's affected area, and injects water into the affected area through the inside of the guide column 303. After the water volume distribution in the affected area reaches the requirement, stop injecting water. Then the doctor controls argon or helium to circulate between the outer wall 302 and the guide column 303. When argon circulates, the temperature of the tissue corresponding to the outer wall 302 drops to more than minus one hundred and seventy degrees Celsius instantly, and the corresponding injected water is frozen; when switching to helium, the tissue is quickly reheated to more than twenty degrees Celsius in a very short time, and the injected water melts; through multiple cycles of cold and heat alternation, the affected tissue of the patient bursts to achieve the treatment purpose.

[0055] After the treatment is over, the doctor controls the operating handle 1 to move the needle body 3 out of the patient's body, then loosens the fixed cover 204, and then the fixing part 2 can be pushed out of the inside of the operating handle 1, so that the fixing part 2 drives the needle body 3 out of the inside of the operating handle 1, and then the needle body 3 can be separated from the fixing part 2, realizing the quick replacement and installation of the needle body 3, thereby improving the doctor's operation efficiency.

[0056] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention. The structures, devices and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. Disposable positioning and water injection cryoablation needle, characterized in that: It includes an operating handle (1), inside which a fixing part (2) is slidably arranged. Inside the fixing part (2), there is a needle body (3). The fixing part (2) can push the needle body (3) out of or pull it into the inside of the operating handle (1) by sliding, and fix the needle body (3) inside the operating handle (1) through the fixing part (2). The needle body (3) includes a docking seat (301), an outer wall (302), a guiding column (303) and a tip (304). The docking seat (301) is inserted into the inside of the fixing part (2). The upper end of the outer wall (302) is fixedly connected to the inside of the docking seat (301). The outer edge of the guiding column (303) is fixedly connected to the inner side of the outer wall (302), and the inside of the guiding column (303) is communicated with the inside of the docking seat (301). The upper end of the tip (304) is threadedly connected to the lower end of the outer wall (302), and the inside of the tip (304) is communicated with the lower end of the guiding column (303).

2. The disposable positioning and water injection cryoablation needle according to claim 1, characterized in that: At the upper end of the guiding column (303), there are vertically arranged linear grooves (3031), and there are four such linear grooves (3031).

3. The disposable positioning and water injection cryoablation needle according to claim 2, wherein: At the lower end of the guiding column (303), there are spiral grooves (3032), and there are four such spiral grooves (3032). The upper end of the spiral grooves (3032) is communicated with the corresponding linear grooves (3031). Two adjacent ones of the four spiral grooves (3032) are in a group, and the lower ends of a group of the spiral air guiding grooves are communicated with each other to form an air guiding channel.

4. The disposable positioning and water injection cryoablation needle according to claim 1, wherein: Inside the guiding column (303), there is also a water guiding groove (3033), and the lower end of the water guiding groove (3033) is communicated with the inside of the tip (304).

5. The disposable positioning and water injection cryoablation needle according to claim 1, characterized in that: Inside the tip (304), there are drain holes. On the outer edges of the outer wall (302) and the tip (304), there are guiding grooves, and the inside of the guiding grooves is matched with the drain holes.

6. The disposable positioning and water injection cryoablation needle according to claim 1, wherein: Inside the tip (304), there are a micro thermocouple and an optical fiber temperature measuring unit.

7. The disposable positioning and water injection cryoablation needle according to claim 1, wherein: On the outer edges of the outer wall (302) and the tip (304), there are developed scale lines.

8. The disposable positioning and water injection cryoablation needle according to claim 1, wherein: The fixing part (2) includes a sliding seat (201), an elastic restoring member (202), a pulling handle (203) and a fixing cover (204). The sliding seat (201) is slidably arranged inside the operating handle (1). The elastic restoring member (202) is arranged between the sliding seat (201) and the operating handle (1). The pulling handle (203) is fixedly connected to one side of the sliding seat (201), and the pulling handle (203) extends out of the inside of the operating handle (1). The fixing cover (204) is arranged at the upper end of the operating handle (1), and the fixing cover (204) is threadedly connected to the operating handle (1). The lower end of the fixing cover (204) is inserted into the upper end inside the sliding seat (201).

9. The disposable positioning and water injection cryoablation needle according to claim 8, wherein: Inside the sliding seat (201), there is an installation groove. Inside the installation groove, there are five pipelines. Among the five pipelines, two are for argon circulation, two are for helium circulation, and the last one is a water injection pipeline. The five pipelines are connected to the air guiding grooves and guiding grooves inside the corresponding guiding column (303).

10. The disposable positioning and water injection cryoablation needle according to claim 8, characterized in that: The lower end of the fixed cover (204) is provided in a conical shape, and the conical shape is matched with the fixed groove inside the upper end of the sliding seat (201).

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