Flexible puncture structure and vapor ablation system

Abstract

The present application relates to the technical field of vapor ablation, and provides a flexible puncture structure and a vapor ablation system, the flexible puncture structure comprising a rear-end elastic tube, a distal end head, a puncture needle and a screw rod, the distal end head being connected with the rear-end elastic tube to form a cavity channel, the distal end head being provided with an extension hole communicating with the cavity channel; the puncture needle being movably arranged in the cavity channel, the puncture needle being provided with a vapor channel; the screw rod comprising a driving section and a bending section connected with each other, at least part of the screw rod being arranged in the cavity channel and being arranged in parallel with the puncture needle, the driving section being connected with the puncture needle through a connecting piece, the screw rod being rotated to move the connecting piece, thereby driving the puncture needle to extend out of the extension hole or to retreat into the cavity channel, the bending section being capable of bending and deforming. The screw rod is rotated to drive the connecting piece to slide along the distal end head, thereby making the puncture needle extend out of the extension hole or retract, and completing a puncture action. The rear-end elastic tube and the bending section of the screw rod are suitable for bending and deforming, have high bending capacity, can easily reach a deep part of a human body, and thus flexible transmission puncture is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of steam ablation, and in particular to a flexible puncture structure and a steam ablation system. Background Art

[0002] Thermal steam ablation is a minimally invasive, safe and highly effective treatment method. This method heats sterile water into high-temperature steam, which is then injected into the diseased tissue through a special needle. The high-temperature steam is used to inactivate the diseased tissue, causing it to undergo apoptosis and necrosis and be absorbed by the human body, thereby achieving the corresponding therapeutic effect.

[0003] In the related art, the needle outlet structure of the thermal steam ablation device is a rigid structure that cannot be bent and is not flexible, and is not suitable for the treatment of natural cavities with various complex curved shapes in the human body. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a flexible puncture structure, which is intended to achieve flexible transmission puncture.

[0005] The present invention also provides a steam ablation system.

[0006] The flexible puncture structure according to the first embodiment of the present invention comprises:

[0007] rear end elastic tube;

[0008] A distal head, the distal head is connected to the rear elastic tube to form a cavity channel, and the distal head is provided with an extension hole communicating with the cavity channel;

[0009] a puncture needle, the puncture needle being movably disposed in the cavity channel, and having a steam channel disposed therein;

[0010] A screw, comprising a connected driving section and a curved section, at least a portion of the screw being disposed in the cavity channel and arranged in parallel with the puncture needle, the driving section being connected to the puncture needle via a connecting piece, the screw being rotated to move the connecting piece, thereby driving the puncture needle to extend out of the extension hole or retract into the cavity channel, and the curved section being bendable and deformable.

[0011] According to the flexible puncture structure of an embodiment of the present invention, the puncture portion is inserted into the corresponding position in the patient's body through the endoscope instrument channel, and then the driving portion is operated to drive the puncture needle to perform the puncture action. A steam channel is provided in the puncture needle for releasing steam, so that the hot steam enters the lesion along the steam channel and ablates the tissue. The distal head and the rear elastic tube are connected to form a cavity channel, which supports and protects the internal components. The puncture needle can be extended through the extension hole on the distal head for puncture. The driving section of the screw is connected to the puncture needle through a connecting piece. During operation, the screw rotates under the drive of the power source, driving the connecting piece to slide along the distal head, thereby causing the puncture needle to extend or retract from the extension hole relative to complete the puncture action. The rear elastic tube and the curved section of the screw are suitable for bending and deformation, have strong bending ability, and can easily reach deep into the human body, thereby achieving flexible transmission puncture.

[0012] According to one embodiment of the present invention, the end of the driving segment away from the bending segment is rotatably connected to the distal head, the driving segment is provided with an external thread, the connecting piece is fixedly connected to the puncture needle, and the connecting piece is threadedly connected to the driving segment. When the driving segment rotates, the connecting piece moves along the driving segment.

[0013] According to one embodiment of the present invention, the distal head is provided with a fixing groove, and one end of the driving section away from the bending section is rotatably inserted into the fixing groove.

[0014] According to one embodiment of the present invention, the inner wall of the distal head is provided with at least one slide groove, the extension direction of the slide groove is parallel to the extension direction of the puncture needle, and the connecting piece is provided with a slider corresponding to each slide groove, and the slider is accommodated in the slide groove and slides along the slide groove.

[0015] According to one embodiment of the present invention, the inner wall of the distal head is provided with two said slide grooves, the two said slide grooves are symmetrically arranged, the connecting member is protruded with two said sliders, and each said slider is slidably arranged in one said slide groove.

[0016] According to one embodiment of the present invention, the distal tip comprises:

[0017] A front end fixing seat, wherein the front end fixing seat is provided with the extension hole;

[0018] a front elastic tube, one end of which is connected to an end of the front fixing seat away from the extension hole;

[0019] An intermediate fixing seat, wherein the intermediate fixing seat is connected to one end of the front elastic tube away from the front fixing seat, the intermediate fixing seat is connected to the rear elastic tube, a telescopic space is formed between the intermediate fixing seat and the front fixing seat, the driving section is threadedly connected to the intermediate fixing seat, and the connecting piece is respectively fixedly connected to the driving section and the puncture needle. When the driving section rotates, it is suitable for driving the connecting piece to move back and forth along the telescopic space.

[0020] According to one embodiment of the present invention, the front elastic tube is coated with a resin protective layer.

[0021] According to one embodiment of the present invention, the rear end elastic tube is coated with a resin protective layer.

[0022] According to one embodiment of the present invention, a plurality of small holes communicating with the steam channel are provided at one end of the puncture needle extending from the extension hole.

[0023] The steam ablation system according to the second embodiment of the present invention includes a puncture drive device and the above-mentioned flexible puncture structure, and the puncture drive device is connected to the screw to drive the screw to rotate.

[0024] The steam ablation system according to an embodiment of the present invention includes the above-mentioned flexible puncture structure, and thus has all the technical effects of the above-mentioned flexible puncture structure, which will not be described in detail here.

[0025] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 is a cross-sectional view of a flexible puncture structure provided by an embodiment of the present invention.

[0028] Figure 2 4 is a cross-sectional view of the flexible puncture structure provided by an embodiment of the present invention.

[0029] Figure 3 It is a cross-sectional view of another embodiment of the flexible puncture structure provided by an embodiment of the present invention.

[0030] Figure 4 It is a structural diagram of a steam ablation system provided in an embodiment of the present invention.

[0031] Reference numerals:

[0032] 1. Human-computer interaction input device; 2. Control system; 3. Sterile water device; 4. Sterile water drive component; 5. Heating unit; 6. Flexible puncture structure; 7. Puncture drive device; 601. Distal head; 6011. Fixing groove; 6012. Extension hole; 6013. Slide groove; 602. Puncture needle; 6021. Small hole; 603. Connector; 6031. Slider; 604. Rear end elastic tube; 605. Resin protective layer; 606. Screw; 6061. Drive section; 6062. Bending section; 801. Front end fixing seat; 803. Front end elastic tube; 805. Middle fixing seat; 807. Telescopic space. DETAILED DESCRIPTION

[0033] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0035] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0036] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0038] Among the existing treatment technologies for pancreatic cancer, surgical treatment involves the removal of the diseased tissue and its surrounding related tissues through surgical means to completely remove the lesion from the human body. This method can cure the disease in the early stages of the disease, but this method not only requires open surgery, which is very traumatic to the patient, but also usually requires the removal of some surrounding tissues, such as the duodenum, gallbladder, bile duct, lymph nodes, spleen, etc. For patients with larger tumors, a total pancreatectomy is required, which greatly affects the patient's quality of life after surgery.

[0039] Radiotherapy is an important treatment for pancreatic cancer, particularly combined chemotherapy and radiotherapy, which is currently the preferred treatment for locally advanced pancreatic cancer. However, because pancreatic cancer is highly resistant to radiotherapy, and adjacent organs also have poor tolerance to radiation, radiotherapy dose control requires high standards. Using low-dose, high-frequency radiotherapy requires frequent treatments, disrupting patients' normal lives.

[0040] To address these issues, the present invention provides a flexible puncture structure 6 and steam ablation system. This method, under endoscopic guidance, delivers heated steam to the lesion via a flexible puncture needle 602, achieving precise control without damaging surrounding normal tissue. The flexible puncture structure 6 can directly reach the lesion through the narrow channel of the endoscope, eliminating the need for surgical intervention and the lengthy postoperative recovery process, allowing patients to be discharged quickly after treatment.

[0041] like Figure 1 As shown, the flexible puncture structure 6 according to the embodiment of the first aspect of the present invention includes a rear end elastic tube 604, a distal head 601, a puncture needle 602 and a screw 606. The distal head 601 is connected to the rear end elastic tube 604 to form a cavity channel. The distal head 601 is provided with an extension hole 6012 connected to the cavity channel; the puncture needle 602 is movably arranged in the cavity channel, and a steam channel is provided in the puncture needle 602; the screw 606 includes a connected driving section 6061 and a bending section 6062. At least a part of the screw 606 is arranged in the cavity channel and is arranged parallel to the puncture needle 602. The driving section 6061 is connected to the puncture needle 602 through the connecting member 603. The screw 606 rotates to move the connecting member 603, thereby driving the puncture needle 602 to extend out of the extension hole 6012 or retract into the cavity channel. The bending section 6062 can be bent and deformed. It can be understood that the driving section 6061 is configured as a rigid structure and is not bendable, so as to facilitate the driving connecting member 603 to move in a straight line and ensure the accuracy of puncture.

[0042] According to the flexible puncture structure 6 of the embodiment of the present invention, the puncture portion is inserted into the corresponding position in the patient's body through the endoscope instrument channel, and then the driving portion is operated to drive the puncture needle 602 to perform the puncture action. A steam channel is provided in the puncture needle 602 for releasing steam, so that the hot steam enters the lesion along the steam channel and ablates the tissue. The distal head 601 and the rear elastic tube 604 are connected to form a cavity channel, which supports and protects the internal components. The puncture needle 602 can be extended through the extension hole 6012 on the distal head 601 for puncture. The driving section 6061 of the screw 606 is connected to the puncture needle 602 through the connecting member 603. During operation, the screw 606 rotates under the drive of the power source, driving the connecting member 603 to slide along the distal head 601, thereby causing the puncture needle 602 to extend or retract from the extension hole 6012 relative to complete the puncture action. The rear elastic tube 604 and the curved section 6062 of the screw 606 are suitable for bending and deformation, have strong bending ability, and can easily reach deep into the human body, thereby achieving flexible transmission puncture.

[0043] In this embodiment, the distal tip 601 is a separate, cylindrical component with an open end for fixed connection to one end of the elastic tube. The distal tip 601, distal to the rear elastic tube 604, is provided with an extension hole 6012 for extending the puncture needle 602. The connection between the rear elastic tube 604 and the distal tip 601 may be adhesive, snap-fit, or threaded, without limitation. It should be noted that the mounting space for the screw 606 is offset from the extension hole 6012 to prevent the screw 606 from obstructing the puncture needle 602 from extending through the extension hole 6012. Exemplarily, the distal tip 601 has a mounting space and an extension space formed in parallel. The mounting space is used to mount the screw 606, and the extension space is connected to the extension hole 6012, allowing the puncture needle 602 to move from the extension space toward the extension hole 6012. It will be appreciated that the tip of the puncture needle 602 is used to release steam, and the tail end of the puncture needle 602 can be connected to an external steam device via a connecting tube.

[0044] Optionally, rear elastic tube 604 is a spring tube, which maintains a certain strength to ensure maneuverability and is flexible and bendable, allowing the puncture portion to pass through the endoscopic instrument channel into the human body to puncture the affected tissue. The entire spring tube structure is rigid, with only the mounting base being relatively small, only approximately 5 mm in length. This provides excellent flexibility and strong bending ability, allowing for easy passage through the endoscopic channel. Of course, in other embodiments, rear elastic tube 604 can also be made of other polymer materials, as long as they maintain a certain degree of flexibility.

[0045] As will be appreciated, the drive section 6061 of the screw 606 is externally threaded, and the connector 603 is threadedly connected to the drive section 6061. When the screw 606 rotates, the connector 603 moves along the drive section 6061, thereby driving the puncture needle 602 to move and perform puncture. Of course, in other embodiments, the drive section 6061 can also be threadedly connected to the distal tip 601, with movement of the screw 606 driving the connector 603. The curved section 6062 of the screw 606 can be a spring-like tubular structure to adapt to the various complex and curved shapes of the human body's natural cavities. Because the screw 606 is used for transmission, the puncture needle 602 can achieve self-locking when it reaches the predetermined puncture site, eliminating the need for an additional locking device.

[0046] Optionally, the puncture needle 602 is made of a polymer material with good flexibility and poor thermal conductivity, thereby avoiding scalding normal tissues and premature condensation of steam, and achieving a good treatment effect.

[0047] According to one embodiment of the present invention, the end of the driving section 6061 away from the curved section 6062 is rotatably connected to the distal head 601. The driving section 6061 is provided with external threads. The connecting member 603 is fixedly connected to the puncture needle 602. The connecting member 603 is threadedly connected to the driving section 6061. When the driving section 6061 rotates, the connecting member 603 moves along the driving section 6061. It will be understood that the distal end of the screw 606 is provided with a fixed end, which is connected to the distal head 601 and can rotate relative to each other. The fixed end cooperates with the distal head 601 to limit the axial displacement of the screw 606. That is, when the screw 606 rotates, the driving section 6061 rotates accordingly. Because the connecting member 603 is sleeved on the external threads of the driving section 6061 and is fixedly connected to the puncture needle 602, when the connecting member 603 moves along the driving section 6061, the puncture needle 602 moves under the influence of the connecting member 603. The screw rod 606 is rotated to make the puncture needle 602 perform puncture motion. When the screw rod 606 is rotated in the reverse direction, the puncture needle 602 can be retracted into the cavity channel to complete the puncture, which is easy to operate.

[0048] According to one embodiment of the present invention, the distal end 601 is provided with a fixing slot 6011, and the end of the driving section 6061 away from the curved section 6062 is rotatably inserted into the fixing slot 6011. It can be understood that the fixing end is rotatably connected to the fixing slot 6011, and the fixing slot 6011 serves to axially position the screw 606 without restricting rotation along the central axis. In addition, the sidewalls of the fixing slot 6011 can limit the fixing end to prevent positional displacement during rotation of the fixing end.

[0049] Please refer to Figure 1 and Figure 2 According to one embodiment of the present invention, the inner wall of the distal head 601 is provided with at least one slide groove 6013, the extension direction of the slide groove 6013 is parallel to the extension direction of the puncture needle 602, and the connecting member 603 is provided with a slider 6031 corresponding to each slide groove 6013, and the slider 6031 is accommodated in the slide groove 6013 and slides along the slide groove 6013.

[0050] It is understood that the slider 6031 and the slide groove 6013 cooperate to limit the circumferential rotation of the connector 603 without limiting the axial displacement of the connector 603. Exemplarily, the distal head 601 is provided with at least one slide groove 6013 on its circumference, and the connector 603 is provided with sliders 6031 at corresponding positions, with the number of sliders 6031 being the same as the number of slide grooves 6013. The connector 603 is slidably connected to the distal head 601 via the slide grooves 6013 and the sliders 6031, allowing the connector 603 to slide back and forth along the axial direction of the screw 606. The slide grooves 6013 guide the sliders 6031 to prevent the connector 603 from rotating.

[0051] According to one embodiment of the present invention, the inner wall of the distal tip 601 is provided with two symmetrically arranged sliding grooves 6013, and the connector 603 is provided with two sliders 6031, each slider 6031 being slidably disposed within a sliding groove 6013. Exemplarily, the two sliding grooves 6013 are located above and below the connector 603, respectively. Accordingly, sliders 6031 are provided at both the upper and lower ends of the connector 603. The two sliders 6031 slide in the two sliding grooves 6013, respectively, to ensure smooth movement of the connector 603 and help maintain uniform force on both ends of the connector 603.

[0052] like Figure 3 As shown, according to one embodiment of the present invention, the distal head 601 includes a front end fixing seat 801, a front end elastic tube 803 and an intermediate fixing seat 805, and the front end fixing seat 801 is provided with an extension hole 6012; one end of the front end elastic tube 803 is connected to the end of the front end fixing seat 801 away from the extension hole 6012; the intermediate fixing seat 805 is connected to the end of the front end elastic tube 803 away from the front end fixing seat 801, and the intermediate fixing seat 805 is connected to the rear end elastic tube 604. A telescopic space 807 is formed between the intermediate fixing seat 805 and the front end fixing seat 801, and the driving section 6061 is threadedly connected to the intermediate fixing seat 805. The connecting piece 603 is fixedly connected to the driving section 6061 and the puncture needle 602 respectively. When the driving section 6061 rotates, it is suitable for driving the connecting piece 603 to move back and forth along the telescopic space 807.

[0053] In this embodiment, the distal tip 601 is composed of multiple components, including a front fixing seat 801, a front elastic tube 803, an intermediate fixing seat 805, and a rear elastic tube 604, which are fixedly connected to each other and together form the support portion of the puncture structure. The puncture needle 602 and the screw 606 are located side by side within the support portion. The puncture needle 602 is fixedly connected to the connecting member 603, and the screw 606 is rotatably connected to the connecting member 603. During operation, the screw 606 rotates under the power source. Since the intermediate fixing seat 805 is fixed, the driving section 6061 of the screw 606 rotates synchronously with the axial direction of the front elastic tube 803, thereby driving the puncture needle 602 to extend or retract from the extension hole 6012 relative to the front fixing seat 801, completing the puncture operation. As can be understood, the intermediate fixing base 805 can provide support for the driving section 6061 of the screw 606. Through the threaded connection between the driving section 6061 and the intermediate fixing base 805, when the screw 606 rotates, the driving section 6061 will extend into the telescopic space 807 and move back and forth. The front elastic tube 803 can be adapted to bend to increase flexibility.

[0054] According to one embodiment of the present invention, the front elastic tube 803 is coated with a resin protective layer 605 .

[0055] According to one embodiment of the present invention, the rear end elastic tube 604 is coated with a resin protective layer 605. It can be understood that the resin protective layer 605 can effectively protect the front end elastic tube 803 and the rear end elastic tube 604, avoid excessive wear of the front end elastic tube 803 and the rear end elastic tube 604, and thus reduce the risk of the front end elastic tube 803 and the rear end elastic tube 604 breaking and losing elasticity.

[0056] According to one embodiment of the present invention, the end of the puncture needle 602 extending from the extension hole 6012 is provided with a plurality of small holes 6021 that communicate with the steam channel. These small holes 6021 can be used to release steam, allowing the hot steam to enter the lesion through the holes and ablate the tissue. Exemplarily, the small holes 6021 are arranged in an array along the circumference of the puncture needle 602. Of course, the position, size, and shape of the small holes 6021 can be designed differently depending on the type of treatment and are not limited here.

[0057] like Figure 4 As shown, the steam ablation system according to the second embodiment of the present invention includes a puncture drive device 7 and the above-mentioned flexible puncture structure 6. The puncture drive device 7 is connected to the screw 606 to drive the screw 606 to rotate.

[0058] In this embodiment, the steam ablation system further includes, but is not limited to, a human-machine interactive input device 1, a control system 2, a sterile water device 3, a sterile water drive component 4, and a heating unit 5. The human-machine interactive device 1 serves as a user interface. Medical personnel formulate an appropriate treatment plan based on specific information such as the severity of the patient's condition and the size of the ablation volume, and input the treatment plan into the steam ablation system via the human-machine interactive device 1. The control system 2 receives the treatment plan from the human-machine interactive device 1 and, using a corresponding control algorithm, controls the sterile water drive component 4 and the heating unit 5, thereby controlling the generation of hot steam during treatment. The control system 2 can also receive signals from the puncture drive device 7 to control the puncture drive device 7 to drive the puncture needle within the flexible puncture structure to perform the puncture. The sterile water device 3 stores a certain amount of sterile water. It can be packaged in various forms, such as bags, boxes, or integrated into the hospital's water purification system. The sterile water drive component 4 is connected to the sterile water device 3 and the heating unit 5 via pipelines, respectively, to deliver the sterile water stored in the sterile water device 3 to the heating unit 5. The sterile water drive component 4 can be various pumps or other liquid drive elements with the same function. It is preferably a peristaltic pump here, and the liquid only contacts the pipeline, which is pollution-free and safe. The other end of the heating unit 5 is connected to the flexible puncture structure through a pipeline. The heating unit 5 is used to convert the sterile water from the sterile water drive component 4 into steam and is delivered to the flexible puncture structure through a pipeline. The heating unit 5 can have a variety of heating methods, such as magnetic induction heating, microwave heating, resistance heating, infrared heating, etc. The flexible puncture structure is used for the puncture needle to be inserted into the lesion and the hot steam from the heating unit 5 is transferred to the lesion to achieve the purpose of ablating the lesion and causing necrosis.

[0059] The puncture drive device 7 is used to drive the puncture needle 602 within the flexible puncture structure 6 to extend or retract the distal end. It can be operated in manual mode, automatic mode, or manual / automatic mode. In manual mode, there is no need to communicate with the control system 2. In automatic mode, communication with the control system 2 is performed, and the control system 2 controls the puncture drive device 7. In this case, the drive device 7 can be a motor or other similar power device.

[0060] The steam ablation system according to the embodiment of the present invention includes the flexible puncture structure 6 described above, and thus has all the technical effects of the flexible puncture structure described above, which will not be described in detail here.

[0061] The following describes the operation process of the steam ablation system:

[0062] First, preoperative preparations are performed to ensure the steam ablation system is functioning properly. The distal end of the endoscope is passed through the patient's mouth and into the duodenum via the gastrointestinal tract. The distal ultrasound probe of the endoscope is used to detect the location, size, and morphology of the lesion. Then, the flexible puncture structure 6 is passed through the endoscope instrument channel and into the patient's body. With the assistance of the endoscope, the puncture needle 602 is aligned with the lesion. The puncture needle 602 can be manually or automatically controlled to extend from the distal tip 601 and penetrate a designated location within the lesion. After puncture, the steam ablation system is controlled to generate steam according to a corresponding program and deliver the steam into the lesion through the small hole 6021 at the end of the puncture needle 602. At this point, the puncture needle 602 can be retracted into the distal tip 601 by operating the endoscope and the puncture drive device 7, and then re-pierced into another location in the lesion for ablation. The puncture ablation operation can be repeated depending on the severity of the lesion. The puncture is terminated by operating the puncture drive device 7 to retract the puncture needle 602 into the distal tip 601. Finally, the flexible puncture structure 6 is removed from the endoscope instrument channel, and the endoscope is removed from the patient's body.

[0063] Finally, it should be noted that the above embodiments are intended to illustrate the present invention only and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and are intended to be encompassed by the claims of the present invention.

Claims

1. A flexible puncture structure, characterized in that: include: rear end elastic tube; A distal head, the distal head is connected to the rear elastic tube to form a cavity channel, and the distal head is provided with an extension hole communicating with the cavity channel; a puncture needle, the puncture needle being movably disposed in the cavity channel, and having a steam channel disposed therein; A screw, the screw comprising a connected driving section and a curved section, at least a portion of the screw being disposed in the cavity channel and arranged in parallel with the puncture needle, the driving section being connected to the puncture needle via a connecting piece, the screw being rotated to move the connecting piece, thereby driving the puncture needle to extend out of the extension hole or retract into the cavity channel, and the curved section being bendable and deformable; The distal tip comprises: A front end fixing seat, wherein the front end fixing seat is provided with the extension hole; a front elastic tube, one end of which is connected to an end of the front fixing seat away from the extension hole; An intermediate fixing seat, wherein the intermediate fixing seat is connected to an end of the front elastic tube away from the front fixing seat, the intermediate fixing seat is connected to the rear elastic tube, a telescopic space is formed between the intermediate fixing seat and the front fixing seat, the driving section is threadedly connected to the intermediate fixing seat, and the connecting piece is respectively fixedly connected to the driving section and the puncture needle, and when the driving section rotates, it is suitable for driving the connecting piece to move back and forth along the telescopic space; The front end elastic tube is coated with a resin protective layer.

2. The flexible puncture structure according to claim 1, characterized in that: The inner wall of the distal head is provided with at least one slide groove, the extension direction of the slide groove is parallel to the extension direction of the puncture needle, and the connecting piece is provided with a slider corresponding to each slide groove, and the slider is accommodated in the slide groove and slides along the slide groove.

3. The flexible puncture structure according to claim 2, characterized in that: The inner wall of the distal end head is provided with two sliding grooves, which are symmetrically arranged. The connecting piece is protruded with two sliding blocks, and each sliding block is slidably arranged in one of the sliding grooves.

4. The flexible puncture structure according to any one of claims 1 to 3, characterized in that: The rear end elastic tube is coated with a resin protective layer.

5. The flexible puncture structure according to any one of claims 1 to 3, characterized in that: One end of the puncture needle extending out of the extension hole is provided with a plurality of small holes communicating with the steam channel.

6. A steam ablation system, characterized in that: It comprises a puncture drive device and the flexible puncture structure according to any one of claims 1 to 5, wherein the puncture drive device is connected to the screw to drive the screw to rotate.

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