Ablation prostate puncture device

Abstract

A prostate puncture device capable of achieving ablation comprises an outer sheath, a rotary cutter and a microwave ablation probe, the outer sheath comprises a hollow sheath tube and a hollow connecting column, and a semi-cylindrical groove hole is formed in the outer side surface of the front portion of the hollow sheath tube; a hollow through hole is formed in the middle of the hollow connecting column; the rotary cutter comprises a connecting rod, the front end of the connecting rod is connected with a hollow pipe body, and a semi-cylindrical cutting notch is formed in the side surface of the hollow pipe body; the rear end of the connecting rod is fixedly connected with a rotating handle; the microwave ablation probe comprises a probe body and a limiting block, after the probe body is movably inserted into the hollow sheath tube, a radiation window of the probe body corresponds to the semi-cylindrical groove hole, and the limiting block is fixedly installed at the rear end of the probe body and movably connected into the hollow through hole. According to the utility model, the rotary cutter is firstly inserted into the hollow sheath tube to carry out precise rotary cutting on the prostate tissue to obtain an expected tissue sample, then the rotary cutter is withdrawn, and then the microwave ablation probe is inserted to carry out efficient ablation on a target area, so that on the premise of multiple sampling, the bleeding risk is reduced, and the defects in the prior art are overcome.

Description

Technical Field

[0001] This utility model relates to human daily necessities, and more particularly to medical devices, specifically to an ablation-enabled prostate puncture device. Background Technology

[0002] With advancements in medical examination techniques, biochemical testing and imaging technologies have significantly improved the detection rate of prostate cancer. However, the choice of treatment plan still requires the final pathological results, which in turn necessitates highly precise prostate biopsy techniques. Specific requirements include: accurate localization of the lesion during prostate biopsy; obtaining positive tissue samples; minimizing unnecessary blind punctures and the resulting patient discomfort; precise navigation for deep lesions; and avoiding damage to the urethra and bladder, thus reducing complications such as bleeding.

[0003] There are two main approaches to prostate biopsy: transrectal and transperineal. Because the perineal approach is parallel to the urethra, it allows for the acquisition of more peripheral tissue and accurate differentiation between the anterior, posterior, and apical regions of the prostate. Therefore, the transperineal approach is more advantageous for detecting prostate tumors, especially those in the anterior and apical regions, and it has fewer complications, making it the preferred approach for prostate biopsy. Common complications of prostate biopsy include bleeding, urinary tract infection, and sepsis. Bleeding is a common complication of prostate biopsy. The transperineal approach, with its needle insertion closer to the urethra, increases the likelihood of urethral bleeding.

[0004] Currently, the clinical diagnosis of prostate cancer relies on pathological results obtained through prostate biopsy. Therefore, the method for obtaining pathological tissue is crucial; the biopsy should collect as much tissue as possible to avoid missed diagnoses and misdiagnoses, and to reduce postoperative complications such as bleeding. Generally, the more target prostate tissue obtained during a biopsy, the greater the risk of bleeding.

[0005] Clinically, bleeding caused by prostate biopsy is often controlled by local pressure bandaging with gauze or by indwelling catheterization to compress the urethra. However, these methods cause significant inconvenience to patients' daily lives, and their effectiveness in stopping bleeding is questionable. Furthermore, for most patients with a high suspicion of prostate cancer, perineal prostate biopsy typically involves multiple needle sampling, usually around 12-24 needles. Repeated local prostate biopsies further increase the risk of bleeding; and repeatedly using the same needle tract for prostate biopsy carries a potential risk of tumor implantation along the needle tract. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides an ablation-enabled prostate puncture device that overcomes these deficiencies. Its rational design enables precise sampling and efficient ablation of prostate tissue. By ensuring multiple samplings, local ablation techniques can be used to ablate localized prostate tissue, thereby reducing the risk of further bleeding.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An ablation-enabled prostate puncture device includes an outer sheath, a rotary cutter, and a microwave ablation probe. The outer sheath comprises a hollow sheath tube and a hollow connecting column. The rear end of the hollow sheath tube is coaxially and fixedly connected to the hollow connecting column. A semi-cylindrical groove is formed on the outer surface of the front part of the hollow sheath tube. A hollow through hole is formed in the middle of the rear end face of the hollow connecting column. The front end of the hollow sheath tube is sharp.

[0009] The rotary cutter includes a connecting rod, with a hollow tube body coaxially and fixedly connected to the front end of the connecting rod. The connecting rod and the hollow tube body are movably installed inside a hollow sheath. A semi-cylindrical cutting groove is opened on the side surface of the hollow tube body, and the semi-cylindrical cutting groove mates with a semi-cylindrical slot hole. A rotating handle is fixedly connected to the rear end of the connecting rod, and the front half of the rotating handle is movably connected inside a hollow through hole.

[0010] The microwave ablation probe includes a probe body and a limiting block. The probe body is movably installed inside a hollow sheath. A radiation window is provided at the front of the probe body, and the radiation window corresponds to a semi-cylindrical slot. The limiting block is coaxially fixedly installed at the rear end of the probe body, and the front half of the limiting block is movably connected inside a hollow through hole.

[0011] Preferably, the inner wall of the hollow through hole is provided with a plurality of positioning grooves parallel to the axial direction along the circumferential direction, and the inner wall of the hollow through hole is provided with an annular groove along the circumferential direction. The front end of the positioning groove is connected to the annular groove. The outer circumference of the front part of the rotating handle is provided with the same number of first guide blocks as the positioning grooves, and the first guide blocks are slidably connected in the positioning grooves and the annular grooves. The outer circumference of the front part of the limiting block is provided with the same number of second guide blocks as the positioning grooves, and the second guide blocks are slidably connected in the positioning grooves and the annular grooves.

[0012] Preferably, the front end face of the rotary handle is coaxially provided with a first blind hole, a first pressure block is movably installed in the first blind hole, and a first spring is installed between the rear end face of the first pressure block and the bottom of the first blind hole; the front end of the hollow through hole is provided with a stepped surface, and the front end face of the first pressure block abuts against the stepped surface.

[0013] Preferably, the front end face of the limiting block is coaxially provided with a second blind hole, a second pressure block is movably installed in the second blind hole, and a second spring is fixedly installed between the rear end face of the second pressure block and the bottom of the second blind hole; the front end of the hollow through hole is provided with a stepped surface, and the front end face of the second pressure block abuts against the stepped surface.

[0014] Preferably, both sides of the semi-cylindrical cutting groove are provided with cutting blades.

[0015] This invention provides an ablation-enabled prostate puncture device with the following advantages: First, a rotary cutter is inserted into the outer sheath. Rotating the handle drives the semi-cylindrical cutting groove of the rotary cutter to precisely cut the prostate tissue, obtaining the desired tissue sample. After removing the rotary cutter from the outer sheath, a microwave ablation probe is inserted. The radiation window of the microwave ablation probe can efficiently ablate the target area, ensuring the accuracy and safety of the treatment process. This achieves precise sampling and efficient ablation of prostate tissue. While ensuring multiple samples to guarantee a positive rate and reduce the risk of missed diagnoses and misdiagnoses, local ablation technology is used to ablate local prostate tissue, causing local tissue inactivation and contraction, promoting the closure of small blood vessels, and thus reducing the risk of further bleeding. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of the prior art will be briefly introduced below.

[0017] Figure 1 A schematic diagram of the structure of the outer sheath in this utility model;

[0018] Figure 2 A schematic diagram of the rotary cutter in this utility model;

[0019] Figure 3 A schematic diagram of the structure of the microwave ablation probe in this utility model;

[0020] Figure 4 A cross-sectional schematic diagram of the outer sheath in this utility model;

[0021] Figure 5 A cross-sectional schematic diagram of the rotary cutter in this utility model;

[0022] Figure 6 A cross-sectional schematic diagram of the microwave ablation probe in this utility model;

[0023] Explanation of the labels in the diagram:

[0024] 1. Outer sheath; 11. Hollow sheath tube; 12. Hollow connecting post; 13. Semi-cylindrical slot; 14. Hollow through hole; 15. Positioning groove; 16. Annular groove; 17. Stepped surface;

[0025] 2. Rotary cutter; 21. Connecting rod; 22. Hollow tube body; 23. Semi-cylindrical cutting groove; 24. Rotating handle; 25. First guide block; 26. First blind hole; 27. First pressure block; 28. First spring;

[0026] 3. Microwave ablation probe; 31. Probe body; 32. Limiting block; 33. Radiation window; 34. Second guide block; 36. Second blind hole; 37. Second pressure block; 38. Second spring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0028] Example 1, as Figure 1-6 As shown, an ablation-enabled prostate puncture device includes an outer sheath 1, a rotary cutter 2, and a microwave ablation probe 3. The outer sheath 1 includes a hollow sheath tube 11 and a hollow connecting post 12. The rear end of the hollow sheath tube 11 is coaxially and fixedly connected to the hollow connecting post 12. A semi-cylindrical groove 13 is formed on the outer surface of the front part of the hollow sheath tube 11. A hollow through hole 14 is formed in the middle of the rear end face of the hollow connecting post 12. The front end of the hollow sheath tube 11 is sharp, and the rotary cutter 2 and the microwave ablation probe 3 can be alternately inserted into the hollow sheath tube 11.

[0029] The rotary cutter 2 includes a connecting rod 21, with a hollow tube 22 coaxially fixedly connected to the front end of the connecting rod 21. The connecting rod 21 and the hollow tube 22 are movably installed inside the hollow sheath 11. A semi-cylindrical cutting groove 23 is opened on the side surface of the hollow tube 22, and the semi-cylindrical cutting groove 23 cooperates with the semi-cylindrical slot 13. A rotating handle 24 is fixedly connected to the rear end of the connecting rod 21, and the front half of the rotating handle 24 is movably connected inside the hollow through hole 14. Cutting blades are provided on both sides of the semi-cylindrical cutting groove 23.

[0030] The microwave ablation probe 3 includes a probe body 31 and a limiting block 32. The probe body 31 is movably installed inside the hollow sheath 11. A radiation window 33 is provided at the front of the probe body 31, which corresponds to the semi-cylindrical slot 13. The limiting block 32 is coaxially fixedly installed at the rear end of the probe body 31, and the front half of the limiting block 32 is movably connected inside the hollow through hole 14.

[0031] Working principle:

[0032] In use, the rotary cutter 2 is first inserted into the outer sheath 1, with the front half of the rotating handle 24 inserted into the hollow through hole 14. The connecting rod 21 and the hollow tube body 22 are correspondingly inserted into the hollow sheath 11, and the opening of the semi-cylindrical cutting groove 23 corresponds to the semi-cylindrical groove hole 13. Then, under the guidance of ultrasound positioning in the rectum, the entire hollow sheath 11 is punctured along the perineum to the prostate tissue.

[0033] Then, rotate the handle 24 to rotate the entire rotary cutter 2 within the outer sheath 1. This allows for precise rotary cutting of the prostate tissue through the cutting edge provided on the side of the semi-cylindrical cutting groove 23, resulting in a complete prostate tissue sample. This sample is then retained within the hollow tube 22. Afterward, keeping the outer sheath 1 in place, the entire rotary cutter 2 is withdrawn from the sheath 1 to remove the prostate tissue sample from the hollow tube 22.

[0034] With the outer sheath 1 in the same position, the probe body 31 of the microwave ablation probe 3 is inserted into the hollow sheath 11, and the radiation window 33 is aligned with the semi-cylindrical slot 13 by rotating the limiting block 32. This allows the radiation window 33 to directly contact the prostate tissue through the exposed portion of the semi-cylindrical slot 13, thereby effectively ablating and stopping bleeding. Simultaneously, the highly efficient thermal energy of the microwave ablation probe 3 precisely destroys the lesion tissue, ensuring treatment safety and effectiveness.

[0035] Then repeat the above steps until all puncture sites have been punctured.

[0036] The aforementioned prostate puncture device enables precise sampling and efficient ablation of prostate tissue. This allows for multiple sampling to ensure a high positive rate and reduce the risk of missed or misdiagnosed diagnoses. Local ablation techniques then inactivate and contract the prostate tissue, promoting small blood vessel closure and reducing the risk of further bleeding. Simultaneously, the highly efficient thermal energy of the microwave ablation probe 3 effectively destroys diseased cells, reducing the risk of tumor metastasis along the needle tract, ensuring a smoother postoperative recovery, and lowering the incidence of complications.

[0037] In Embodiment 2, as a further preferred embodiment of Embodiment 1, a plurality of positioning grooves 15 parallel to the axial direction are formed on the inner wall of the hollow through hole 14 in the circumferential direction, and an annular groove 16 is formed on the inner wall of the hollow through hole 14 in the circumferential direction. The front end of the positioning groove 15 is connected to the annular groove 16. The outer circumference of the front part of the rotating handle 24 is provided with the same number of first guide blocks 25 as the positioning groove 15 in the circumferential direction. The first guide blocks 25 are slidably connected in the positioning groove 15 and the annular groove 16. The outer circumference of the front part of the limiting block 32 is provided with the same number of second guide blocks 34 as the positioning groove 15 in the circumferential direction. The second guide blocks 34 are slidably connected in the positioning groove 15 and the annular groove 16.

[0038] Therefore, when the rotary cutter 2 or microwave ablation probe 3 is inserted into the outer sheath 1, the positioning groove 15, in conjunction with the first guide block 25 or the second guide block 34, firstly positions the rotary cutter 2 or microwave ablation probe 3. This ensures that the opening of the semi-cylindrical cutting groove 23 or the radiation window 33 aligns with the opening of the semi-cylindrical slot 13 when the rotary cutter 2 or microwave ablation probe 3 is inserted into the outer sheath 1. Then, the annular groove 16, in conjunction with the first guide block 25 and the second guide block 34, further ensures that the rotating handle 24 or the limiting block 32 can rotate stably circumferentially within the hollow through hole 14. This ensures that the rotary cutter 2 or microwave ablation probe 3 maintains precise alignment during operation, avoiding operational errors caused by axial displacement and further improving the safety and effectiveness of the treatment.

[0039] In embodiment three, as a further preferred embodiment two, a first blind hole 26 is coaxially opened on the front end face of the rotating handle 24, a first pressure block 27 is movably installed in the first blind hole 26, and a first spring 28 is installed between the rear end face of the first pressure block 27 and the bottom of the first blind hole 26; a stepped surface 17 is provided at the front end of the hollow through hole 14, and the front end face of the first pressure block 27 abuts against the stepped surface 17.

[0040] Therefore, when the first half of the rotating handle 24 of the veneer 2 is inserted into the hollow through hole 14 and the first guide block 25 reaches the annular groove, the first spring 28 is compressed. The first spring 28 presses the first pressure block 27 tightly against the step surface 17, thereby enhancing the tight connection between the veneer 2 and the outer sheath 1, maintaining the axial position of the veneer 2, ensuring that the veneer 2 is stable and reliable during operation, and further improving the accuracy and safety of veneer cutting.

[0041] In Example 4, as a further preferred embodiment of Example 2, a second blind hole 36 is coaxially provided on the front end face of the limiting block 32, a second pressing block 37 is movably installed in the second blind hole 36, and a second spring 38 is installed between the rear end face of the second pressing block 37 and the bottom of the second blind hole 36; a stepped surface 17 is provided at the front end of the hollow through hole 14, and the front end face of the second pressing block 37 abuts against the stepped surface 17.

[0042] Therefore, when the first half of the limiting block 32 of the microwave ablation probe 3 is inserted into the hollow through hole 14 and the second guide block 34 reaches the annular groove 16, the second spring 38 is compressed. The second spring 38 presses the second pressure block 37 tightly against the step surface 17, thereby enhancing the tight connection between the microwave ablation probe 3 and the outer sheath 1, maintaining the axial position of the microwave ablation probe 3, ensuring that the microwave ablation probe 3 is stable and reliable during operation, and further improving the accuracy and safety of ablation.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An ablation-enabled prostate puncture device, characterized in that: The device includes an outer sheath (1), a rotary cutter (2), and a microwave ablation probe (3). The outer sheath (1) includes a hollow sheath tube (11) and a hollow connecting post (12). The rear end of the hollow sheath tube (11) is coaxially and fixedly connected to the hollow connecting post (12). A semi-cylindrical groove (13) is opened on the outer surface of the front part of the hollow sheath tube (11). A hollow through hole (14) is opened in the middle of the rear end face of the hollow connecting post (12). The front end of the hollow sheath tube (11) is sharp. The rotary cutter (2) includes a connecting rod (21), the front end of which is coaxially fixedly connected to a hollow tube (22). The connecting rod (21) and the hollow tube (22) are movably installed inside a hollow sheath (11). A semi-cylindrical cutting groove (23) is opened on the side surface of the hollow tube (22), and the semi-cylindrical cutting groove (23) cooperates with a semi-cylindrical slot (13). A rotating handle (24) is fixedly connected to the rear end of the connecting rod (21), and the front half of the rotating handle (24) is movably connected inside a hollow through hole (14). The microwave ablation probe (3) includes a probe body (31) and a limiting block (32). The probe body (31) is movably installed inside the hollow sheath (11). A radiation window (33) is provided at the front of the probe body (31). The radiation window (33) corresponds to the semi-cylindrical slot (13). The limiting block (32) is coaxially fixedly installed at the rear end of the probe body (31). The front half of the limiting block (32) is movably connected inside the hollow through hole (14).

2. The ablation-enabled prostate puncture device according to claim 1, characterized in that: The hollow through hole (14) has multiple positioning grooves (15) parallel to the axial direction on its inner wall along the circumference. The hollow through hole (14) has an annular groove (16) on its inner wall along the circumference. The front end of the positioning groove (15) is connected to the annular groove (16). The outer circumference of the front part of the rotating handle (24) is provided with the same number of first guide blocks (25) as the positioning groove (15) along the circumference. The first guide blocks (25) are slidably connected in the positioning groove (15) and the annular groove (16). The outer circumference of the front part of the limiting block (32) is provided with the same number of second guide blocks (34) as the positioning groove (15) along the circumference. The second guide blocks (34) are slidably connected in the positioning groove (15) and the annular groove (16).

3. The ablation-enabled prostate puncture device according to claim 2, characterized in that: The front end face of the rotary handle (24) is coaxially provided with a first blind hole (26), a first pressure block (27) is movably installed in the first blind hole (26), and a first spring (28) is installed between the rear end face of the first pressure block (27) and the bottom of the first blind hole (26); the front end of the hollow through hole (14) is provided with a stepped surface (17) inward, and the front end face of the first pressure block (27) abuts against the stepped surface (17).

4. The ablation-enabled prostate puncture device according to claim 2, characterized in that: The front end face of the limiting block (32) is coaxially provided with a second blind hole (36), and a second pressure block (37) is movably installed in the second blind hole (36). A second spring (38) is fixedly installed between the rear end face of the second pressure block (37) and the bottom of the second blind hole (36). The front end of the hollow through hole (14) is provided with a stepped surface (17) in the center, and the front end face of the second pressure block (37) abuts against the stepped surface (17).

5. The ablation-enabled prostate puncture device according to claim 1, characterized in that: Both sides of the semi-cylindrical cutting groove (23) are provided with cutting blades.

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