Anti-air-leakage microwave ablation needle

Abstract

An anti-air-leakage microwave ablation needle comprises a needle body, a microwave needle head is arranged at the front end of the needle body, a plurality of supporting piece sets are arranged on the outer side of the needle body in the circumferential direction, each supporting piece set comprises a first supporting rod, a second supporting rod and a third supporting rod, and anti-leakage cloth is arranged between every two adjacent second supporting rods of the third supporting rod. A fixing ring is arranged on the outer side of the needle body, the rear end of any first supporting rod is fixedly connected with the front side of the fixing ring, and a stretching rod is arranged on the rear side of the fixing ring. Compared with the prior art, in the minimally invasive surgery process, after the microwave ablation needle enters the channel, the sealing performance of the channel in the ablation process is guaranteed by opening the supporting piece set, and the ablation injury risk caused by pneumoperitoneum pressure reduction and surrounding organ tissue retraction is reduced.

Description

Technical Field

[0001] This invention relates to consumer goods, and more particularly to medical devices, especially a leak-proof microwave ablation needle. Background Technology

[0002] With advancements in imaging technology, an increasing number of early-stage renal tumors are being discovered, rising by 2-3% annually. Nephron-sparing surgeries such as partial nephrectomy, microwave ablation, and cryoablation have become mainstream techniques for treating early-stage renal tumors. In clinical practice, to avoid creating additional puncture channels, microwave ablation probes are typically inserted through the laparoscopic or robotic access channel for tumor ablation. However, because traditional ablation needles are incompatible with this channel, airtightness cannot be guaranteed, potentially leading to air leakage during the procedure. This affects pneumoperitoneum pressure, causing surrounding organs to move closer to the ablation area due to reduced pressure, increasing the risk of organ damage around the tumor during ablation and thus increasing the overall risk of microwave ablation. Summary of the Invention

[0003] The purpose of this invention is to provide a leak-proof microwave ablation needle, which solves the technical problem in the prior art where the microwave ablation needle and the channel are mismatched, and air leakage easily occurs during operation, leading to damage to the patient's internal organs.

[0004] This invention discloses a leak-proof microwave ablation needle, comprising a needle body with a microwave needle tip at its front end. A plurality of support components are arranged circumferentially on the outer side of the needle body. Each support component assembly includes a first support rod, a second support rod, and a third support rod. The first support rod is close to the outer wall of the needle body and parallel to its axial direction. The first support rod and the outer wall of the needle body form a sliding pair along their axis. The front ends of the first and second support rods are hinged together. The rear end of the second support rod is located outside the first support rod. The third support rod is located between the rear ends of the first and second support rods. The outer end of the third support rod and the rod body of the second support rod form a sliding pair. The inner end of the third support rod is hinged to the outer wall of the needle body. A leak-proof cloth is provided between any two adjacent second support rods. A fixing ring is sleeved on the outer side of the needle body. The rear end of each first support rod is fixedly connected to the front side of the fixing ring. A tension rod is provided on the rear side of the fixing ring.

[0005] Furthermore, at least one arc-shaped connector is provided between two adjacent first support rods.

[0006] Furthermore, an annular storage compartment is provided on the outer side of the needle body, the opening of the storage compartment faces the rear side of the needle body, and the storage compartment is located at the front end of the first support rod.

[0007] Working principle: An umbrella-shaped air-leakage prevention device is set on the outside of the needle body. By pulling the tension rod forward or backward, the opening and closing of the support assembly is controlled. When open, it forms an umbrella-shaped isolation layer to prevent air leakage. It can be closed after the operation is completed.

[0008] Compared with existing technologies, the effects of this invention are positive and significant. During minimally invasive surgery, after the microwave ablation needle enters the channel, the support assembly is opened to ensure the airtightness of the channel during ablation, reducing the risk of ablation damage caused by the retraction of surrounding organs and tissues due to reduced pneumoperitoneum pressure. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the closed state of the support assembly of a leak-proof microwave ablation needle according to the present invention.

[0010] Figure 2 This is a schematic diagram of the open state of the support assembly of a leak-proof microwave ablation needle according to the present invention.

[0011] Figure 3 This is a schematic diagram of the support assembly structure of a leak-proof microwave ablation needle according to the present invention.

[0012] Figure 4 This is a top view schematic diagram of the needle tip of a microwave ablation needle for preventing air leakage according to the present invention.

[0013] Example 1

[0014] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a leak-proof microwave ablation needle includes a needle body 1 with a microwave needle tip 2 at its front end. Several support groups are arranged circumferentially on the outer side of the needle body 1. Each support group includes a first support rod 3, a second support rod 4, and a third support rod 5. The first support rod 3 is close to the outer wall of the needle body 1 and parallel to the axial direction of the needle body 1. The first support rod 3 and the outer wall of the needle body 1 form a sliding pair along its axial direction. The front ends of the first support rod 3 and the second support rod 4 are hinged together. The rear end of the second support rod 4 is located outside the first support rod 3. The third support rod 5 is located between the rear ends of the first support rod 3 and the second support rod 4. The outer end of the third support rod 5 and the rod body of the second support rod 4 are configured as a sliding pair. The inner end of the third support rod 5 is hinged to the outer wall of the needle body 1. A leak-proof cloth 6 is provided between any two adjacent second support rods 4. A fixing ring 7 is sleeved on the outer side of the needle body 1. The rear end of any first support rod 3 is fixedly connected to the front side of the fixing ring 7. A tension rod 8 is provided on the rear side of the fixing ring 7.

[0015] Furthermore, at least one arc-shaped connector is provided between two adjacent first support rods 3.

[0016] Furthermore, an annular storage compartment 9 is provided on the outer side of the needle body 1, with the opening of the storage compartment 9 facing the rear side of the needle body 1, and the storage compartment 9 is located at the front end of the first support rod 3.

[0017] The working process of this embodiment:

[0018] 1. An operating channel is created using laparoscopy or robotics;

[0019] 2. Insert this product into the operating channel;

[0020] 3. After inserting the microwave needle to the lesion, pull the tension rod 8 backward to open the support assembly outward, forming an umbrella-shaped isolation layer, such as... Figure 4 ;

[0021] 4. After microwave ablation is complete, push the tension rod 8 forward to restore the support assembly to its closed state.

[0022] Simply remove this product.

[0023] The support assembly opens: Pulling the tension rod 8 backward causes the fixing ring 7 to move towards the rear end of the needle body 1. The fixing ring 7 causes the first support rod 3 connected to the front side to move towards the rear end. The front end of the second support rod 4 and the front end of the first support rod 3 remain hinged. As they move, the angle between them gradually increases. The inner end of the third support rod 5 remains hinged to the outer wall of the needle body 1. The outer end of the third support rod 5 slides on the second support rod 4 and gradually slides from the rear end of the second support rod 4 towards the front end, thereby supporting and pushing the outer end of the second support rod 4 to open outward. As the second support rod 4 opens, the leak-proof cloth 6 unfolds together, forming an umbrella-shaped leak-proof ring to prevent gas from leaking from the front end to the rear end of the needle body 1.

[0024] Closing of the support assembly: Push the tension rod 8 forward, causing the fixing ring 7 to move towards the front end of the needle body 1. The fixing ring 7 pushes the first support rod 3 forward, the rear end of the second support rod 4 closes towards the needle body 1, the outer end of the third support rod 5 slides towards the rear end of the second support rod 4, and the leak-proof cloth 6 also closes towards the needle body 1. Finally, the support assembly is closed.

[0025] Specifically, the distance of the tension rod 8 is adjusted according to the size of the operating channel.

Claims

1. A gas-tight microwave ablation needle comprising a needle body (1), said needle body (1) being provided at its front end with a microwave needle tip (2), characterized in that: The outer side of the needle body (1) is provided with a plurality of support groups in the circumferential direction, any one of the support groups comprises a first support rod (3), a second support rod (4) and a third support rod (5), the first support rod (3) is close to the outer wall of the needle body (1), the first support rod (3) is parallel to the axial direction of the needle body (1), the first support rod (3) and the outer wall of the needle body (1) constitute a sliding pair along the axis, the front end of the first support rod (3) and the front end of the second support rod (4) are hinged, the rear end of the second support rod (4) is arranged outside the first support rod (3), the third support rod (5) is arranged between the rear ends of the first support rod (3) and the second support rod (4), the outer end of the third support rod (5) and the rod body of the second support rod (4) are arranged as a sliding pair, the inner end of the third support rod (5) is hinged with the outer wall of the needle body (1), a leakage cloth (6) is arranged between any two adjacent second support rods (4), a fixing ring (7) is arranged outside the needle body (1), the rear end of any one of the first support rods (3) is fixedly connected with the front side of the fixing ring (7), and a stretching rod (8) is arranged at the rear side of the fixing ring (7).

2. A leak-resistant microwave ablation needle according to claim 1, wherein: At least one arc-shaped connecting piece is arranged between two adjacent first support rods (3).

3. A non-perforating microwave ablation needle according to claim 1, wherein: An annular receiving bin (9) is arranged outside the needle body (1), the opening of the receiving bin (9) faces the rear side of the needle body (1), and the receiving bin (9) is arranged at the front end of the first support rod (3).

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