Double-net-bag cooperative percutaneous puncture integral tumor excision system

Abstract

The invention provides a double-net-bag cooperative percutaneous puncture integral tumor excision system. The double-net-bag cooperative percutaneous puncture integral tumor excision system comprises net bags, the puncture coaxial guide system is used for establishing a percutaneous working channel from the body surface to the tumor edge; a fixing anchor is arranged at the far end of the inner core fixing rod and is used for fixing tumor tissues; the double-net-bag cutting system comprises an outer net bag and an inner net bag; the outer net bag is made of a high-rigidity material and is used for firstly expanding to create a protected operation space in tissues around the tumor. The whole core cutting component is double-net-bag cooperative cutting, no circuit or sensor or hydraulic system is adopted, the production cost is extremely low, large-scale manufacturing is easy, operation is visual, the whole operation process only comprises several simple actions of pushing, rotating and pulling, the learning cost of doctors is low, the surgical operation intuition is well met, and popularization is easy.

Description

Technical Field

[0001] This invention belongs to the field of medical devices, specifically a dual-mesh synergistic percutaneous tumor resection system. Background Technology

[0002] In current clinical practice, percutaneous interventional techniques are an important means of treating solid tumors in vivo. However, existing mainstream techniques have significant limitations and cannot simultaneously meet multiple requirements such as minimally invasiveness, complete resection, specimen acquisition, and ease of operation.

[0003] Currently, percutaneous tumor treatment mainly relies on two major types of techniques: Ablation techniques include radiofrequency ablation, microwave ablation, and cryoablation. These techniques inactivate tumor cells in situ using physical or chemical methods. While they have the advantage of being minimally invasive, their fundamental drawback is the inability to obtain complete tumor tissue specimens for pathological analysis.

[0004] Biopsy technique: A small amount of tumor tissue is obtained through a needle for pathological diagnosis. This technique can only provide a limited sample and cannot achieve therapeutic tumor resection; its core value lies in diagnosis rather than treatment.

[0005] On the other hand, traditional methods that can achieve radical tumor resection, such as laparoscopic surgery or open surgery, can completely remove the tumor and obtain a specimen, but they are highly invasive, have long recovery times, are expensive, and result in surgical scars and higher perioperative risks. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a dual-mesh-capsule synergistic percutaneous tumor resection system to solve the problems in the prior art.

[0007] A dual-reticulum synergistic percutaneous tumor resection system includes: A coaxial puncture guidance system is used to establish a percutaneous working channel from the body surface to the tumor margin; The inner core fixing rod has a fixing anchor at its distal end for fixing tumor tissue; The double-capsule cutting system includes an outer capsule and an inner capsule; The outer mesh capsule is made of a high-rigidity material and is designed to expand first to create a protected operating space in the tissue surrounding the tumor. The inner mesh capsule is pre-placed inside the unexpanded outer mesh capsule, and is used to expand within the operating space to encapsulate the tumor, and to detach the tumor through coordinated action with the outer mesh capsule. Both the outer and inner mesh bags are connected to a first control rod and a second control rod, which are used to realize their respective pushing, positioning and retraction.

[0008] Preferably, the structure formed after the outer mesh expands is a hollow hemispherical dome or cage-like structure with high radial support.

[0009] Preferably, the outer mesh bag is woven from nickel-titanium alloy wire or polymer fiber, and the surface of the wire is coated with a smooth coating or a hemostatic material coating.

[0010] Preferably, the inner mesh is woven from high-strength fibers, including nickel-titanium alloy wire or ultra-high molecular weight polyethylene fiber.

[0011] Preferably, by retracting the outer mesh capsule, the inner mesh capsule can be driven to contract synchronously, thereby applying a uniform circumferential force to the base of the tumor and bluntly severing it.

[0012] Preferably, the inner core fixing rod is a hollow structure, which can be used as a channel for injecting drugs or passing through guide wires.

[0013] Preferably, the system further includes a hemostatic component integrated on the outer or inner mesh bag for hemostasis of the wound after tumor transection; wherein the hemostatic component includes an outer mesh bag filament covered with hemostatic material or a hemostatic cup integrated at the distal end of the inner mesh bag.

[0014] Preferably, a method for tumor resection using the system described in any one of claims 1-7 is characterized by comprising the following steps: Step 1: Establish a percutaneous working channel to the tumor margin using a puncture coaxial guidance system; Step 2: Insert the inner core fixation rod and use its distal fixation anchor to fix the tumor tissue; Step 3: Deploy the outer mesh capsule and expand it by pushing the first control lever to create operating space around the tumor; Step 4: Deploy the inner network capsule by pushing the second control lever to expand it within the operating space and encapsulate the tumor; Step 5: Retract the first control lever to drive the inner sac to close synchronously, thereby bluntly severing the tumor and recovering the entire system and the severed tumor sample.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The invention has a simple structure: the entire core cutting component is a dual-mesh synergistic cutting system, without circuits, sensors or hydraulic systems, resulting in extremely low production costs and easy mass production.

[0016] 2. The operation of this invention is intuitive: the entire surgical process only includes a few simple actions such as "pushing", "rotating" and "pulling", which reduces the learning cost for doctors, is very intuitive for surgical operation, and is easy to promote.

[0017] 3. This invention is safe and reliable: it is purely mechanical cutting, avoiding the risk of energy burning surrounding tissues; the mechanical action has high determinism and its reliability far exceeds that of complex electronic control systems.

[0018] 4. Functional integration of the invention: It ingeniously utilizes the continuous movement of mechanical parts to seamlessly connect the five core steps of "pushing, unfolding, wrapping, cutting, and stopping bleeding", resulting in extremely high efficiency.

[0019] 5. This invention requires no external energy source: the entire process does not require connection to a high-frequency generator or other energy platform and can be used in any environment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of the dual-capsule cutting system of the present invention; Figure 2 This is a schematic diagram of the cross-sectional structure of the dual-capsule cutting system of the present invention; Figure 3 This is a cross-sectional view of the dual-bladder cutting system of the present invention; Figure 4 This is a schematic diagram of the extended structure of the outer mesh portion of the present invention; Figure 5 This is a schematic diagram of the extended structure of the inner mesh capsule portion of the present invention; Figure 6 This is a schematic diagram of the fully extended inner mesh capsule structure of the present invention; Figure 7 This is a schematic diagram of the overall retraction structure of the present invention.

[0021] In the diagram: 1. Inner core fixing rod; 11. Fixing anchor; 2. Outer mesh bag; 21. First control rod; 3. Inner mesh bag; 31. Second control rod. Detailed Implementation

[0022] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0023] Example 1: As Figure 1-7 As shown, the present invention provides a dual-mesh synergistic percutaneous tumor resection system, comprising, A coaxial puncture guidance system is used to establish a percutaneous working channel from the body surface to the tumor margin; The inner core fixing rod 1 has a fixing anchor 11 at its distal end for fixing tumor tissue. The inner core fixing rod 1 is a hollow structure and can be used as a channel for injecting drugs or passing through guide wires. The double-mesh bag cutting system includes an outer mesh bag 2 and an inner mesh bag 3; The outer mesh capsule 2 is made of a high-rigidity material and is used for initial expansion to create a protected operating space in the tissue surrounding the tumor. The expanded outer mesh capsule 2 forms a hollow hemispherical dome or cage-like structure with high radial support. The outer mesh capsule 2 is woven from nickel-titanium alloy wire or polymer fibers, and the surface of the wires is coated with a smooth coating or a hemostatic material coating. The inner mesh capsule 3 is pre-placed inside the unexpanded outer mesh capsule 2 and is used to expand within the operating space to encapsulate the tumor and to detach the tumor through coordinated action with the outer mesh capsule 2; the inner mesh capsule 3 is woven from high-strength fibers, including nickel-titanium alloy wire or ultra-high molecular weight polyethylene fiber.

[0024] The outer mesh bag 2 and the inner mesh bag 3 are each connected to a first control rod 21 and a second control rod 31, which are used to realize their respective pushing, positioning and retraction.

[0025] By retracting the outer mesh sac 2, the inner mesh sac 3 can be driven to contract synchronously, thereby applying a uniform circumferential force to the base of the tumor and bluntly severing it.

[0026] The system also includes a hemostatic component integrated on the outer mesh capsule 2 or the inner mesh capsule 3 for hemostasis of the wound after tumor transection; wherein the hemostatic component includes filaments of the outer mesh capsule 2 covered with hemostatic material or a hemostatic cup integrated at the distal end of the inner mesh capsule 3.

[0027] The above embodiments also include the following implementation methods: Puncture and localization: Under real-time CT imaging guidance, the coaxial guidance system, including the guide needle, sharp-tipped core, and blunt-tipped core, is percutaneously inserted to the outer edge of the tumor capsule. After confirming that the tip of the guide needle is near the center of the tumor, the sharp-tipped core is withdrawn.

[0028] Internal fixation: A coaxial guide sheath is inserted into the double-mesh capsule system, and the inner core fixation rod 1 is pushed forward. The distal conical blunt end of the inner core fixation rod 1 penetrates the tumor capsule and embeds itself within the tumor parenchyma to fix the tumor tissue and prevent its movement.

[0029] After fixing the inner core fixation rod 1, the coaxial outer sheath and double mesh capsule system are retracted to the proximal end of the tumor to leave space for subsequent mesh capsule deployment.

[0030] Outer Net Bag 2 Deployment and Space Creation: Propel the first control lever 21 forward, extending the outer net bag 2 out of the coaxial sheath end. The outer net bag 2 instantly expands into a rigid hemispherical dome or cage-like structure with a diameter of approximately 4 cm.

[0031] Under CT scan monitoring, the first control lever 21 is slightly advanced and rotated to bluntly separate the peritumoral liver tissue using the rigid, smooth mesh wires at the distal end of the outer mesh capsule 2, partially covering the tumor lesion. In this way, the outer mesh capsule 2 establishes a protected and stable operating space around the tumor.

[0032] Deployment of the inner mammary capsule 3 and tumor encapsulation: Within the operating space, advance the second control lever 31 forward. The inner mammary capsule 3 smoothly expands within the outer mammary capsule 2, forming a deep mammary basket with a diameter of approximately 3.5-4 cm, as shown in the attached diagram. Figure 5 As shown.

[0033] Advance and rotate the second control lever 31 to further bluntly dissect the peritumoral tissue using the smooth, blunt-tipped mesh wires at the distal end of the inner mesh capsule 3 until the inner mesh capsule 3 completely encloses the tumor. CT imaging confirms that the enclosed position is correct.

[0034] Closing and Blunt Disconnection: Keeping the second control lever 31 stationary, slowly retract the first control lever 21. The retraction of the outer mesh bag 2 forces the inner mesh bag 3 to synchronously close inward.

[0035] The inner mesh capsule 3 applies a uniformly increasing circumferential pressure to the base of the tumor, ultimately achieving a purely mechanical blunt transection. During this process, tough tissues such as blood vessels are pushed apart rather than cut, ensuring high safety. After transection, the tumor sample is completely encapsulated by the contracted inner mesh capsule 3.

[0036] Immediate hemostasis and retrieval: Gently shake the device to confirm that the tumor has been completely freed, and then slowly pull out the inner core fixation rod 1, the double mesh capsule system and the wrapped tumor sample as a whole through the original puncture channel.

[0037] The hemostasis method of this invention can be selected according to the design: Option A: External mesh sac 2 for hemostasis: The external mesh sac 2 is woven from silk threads covered with hemostatic material. When contracted, it acts as a large hemostatic plug, compressing the wound to achieve hemostasis.

[0038] Option B: Hemostasis of the inner mesh capsule 3: A hemostatic cup is integrated at the distal end of the inner mesh capsule 3. After cutting, it is pushed out to compress the wound surface for hemostasis.

[0039] Postoperative observation and management: Imaging examination is used to check for active bleeding in the excised area. If there is a small amount of bleeding, hemostatic agents can be injected through the original coaxial puncture channel or other hemostatic measures can be implemented. Patients recover quickly and do not require open surgery.

[0040] The embodiments of the present invention are given for the purposes of illustration and description. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dual-mesh synergistic percutaneous tumor resection system, characterized in that, include; A coaxial puncture guidance system is used to establish a percutaneous working channel from the body surface to the tumor margin; The inner core fixing rod (1) has a fixing anchor (11) at its distal end for fixing tumor tissue; The double-capsule cutting system includes an outer capsule (2) and an inner capsule (3); The outer mesh capsule (2) is made of a high-rigidity material and is used to expand first to create a protected operating space in the tissue surrounding the tumor; The inner mesh capsule (3) is pre-placed inside the unexpanded outer mesh capsule (2) for expansion within the operating space to encapsulate the tumor and for detaching the tumor through coordinated action with the outer mesh capsule (2); The outer mesh bag (2) and the inner mesh bag (3) are both connected to a first control rod (21) and a second control rod (31) to realize their respective pushing, positioning and retraction.

2. The dual-mesh-capsule synergistic percutaneous tumor resection system as described in claim 1, characterized in that: The structure formed by the expansion of the outer mesh (2) is a hollow hemispherical dome or cage structure with high radial support.

3. The dual-mesh synergistic percutaneous tumor resection system as described in claim 1, characterized in that: The outer mesh bag (2) is woven from nickel-titanium alloy wire or polymer fiber, and its wire surface is covered with a smooth coating or a hemostatic material coating.

4. The dual-mesh synergistic percutaneous tumor resection system as described in claim 1, characterized in that: The inner mesh bag (3) is woven from high-strength fibers, including nickel-titanium alloy wire or ultra-high molecular weight polyethylene fiber.

5. The dual-mesh-capsule synergistic percutaneous tumor resection system as described in claim 1, characterized in that: By retracting the outer mesh capsule (2), the inner mesh capsule (3) can be driven to contract synchronously, thereby applying a uniform circumferential force to the base of the tumor and bluntly severing it.

6. The dual-mesh synergistic percutaneous tumor resection system as described in claim 1, characterized in that: The inner core fixing rod (1) is a hollow structure and can be used as a channel for injecting drugs or passing through guide wires.

7. The dual-mesh synergistic percutaneous tumor resection system as described in claim 1, characterized in that: The system also includes a hemostatic component integrated on the outer mesh bag (2) or the inner mesh bag (3) for hemostasis of the wound after tumor detachment; wherein the hemostatic component includes an outer mesh bag (2) filament covered with hemostatic material or a hemostatic cup integrated at the distal end of the inner mesh bag (3).

8. A method for tumor resection using the system described in any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Establish a percutaneous working channel to the tumor margin using a puncture coaxial guidance system; Step 2: Insert the inner core fixation rod (1) and use its distal fixation anchor (11) to fix the tumor tissue; Step 3: Deploy the outer mesh capsule (2) and expand it by pushing the first control rod (21) to create an operating space around the tumor; Step 4: Deploy the inner network capsule (3), and expand it within the operating space to encapsulate the tumor by pushing the second control lever (31); Step 5: Retract the first control lever (21) to drive the inner mesh capsule (3) to close synchronously, thereby bluntly severing the tumor and recovering the entire system and the severed tumor sample.

Images