Puncture components and steam ablation equipment

Abstract

The present invention provides a puncture assembly and a steam ablation device. The puncture assembly includes: a flexible tube for installation on the working channel of an endoscope; a fixed tube connected to the distal end of the flexible tube; a puncture needle movably installed in the fixed tube and the flexible tube; a rope installed in the flexible tube; a reversing mechanism installed in the fixed tube, one end of the reversing mechanism is connected to the rope, and the other end of the reversing mechanism is connected to the distal end of the puncture needle, so as to drive the puncture needle out of the fixed tube when the rope is subjected to tension. According to the puncture assembly of the present application, when operating the puncture assembly, there is no need to push the puncture needle. And because the reversing mechanism is connected to the distal end of the puncture needle, it can avoid applying force to cause the puncture needle to produce additional bending and avoid loss of force, thereby accurately controlling the movement of the puncture needle and improving the accuracy of the puncture. The medical operator at the proximal end can accurately control the puncture depth of the puncture needle, making it easier for the medical operator to use.

Description

Technical Field

[0001] The present invention relates to the technical field of puncture components, and in particular to a puncture component and a steam ablation device. Background Art

[0002] When the puncture needle is performing a puncture, a medical professional applies a puncture force externally. This force is then transmitted to the end of the needle through the puncture needle's own rigidity, thereby performing the puncture. It is well known that due to the structure of the human body, the endoscope will have multiple curved parts during its entry into the body, rather than being a straight line. In order for the puncture needle to pass smoothly through the curved parts of the endoscope, the puncture needle itself must be made relatively flexible and have a certain degree of bending ability. This results in the puncture needle also being in a curved state after entering the body. When the medical professional performs the puncture, there will be a significant loss in the puncture force transmitted from the hand end to the end of the puncture needle, so the puncture force applied by the hand end is usually greater. In addition, when the flexible puncture needle is subjected to force, it will become more curved, which will result in a discrepancy between the distance the hand end advances and the actual puncture depth of the puncture needle. Even with the assistance of an endoscope for auxiliary observation, the assessment of the actual puncture depth is similar to a blind operation. Summary of the Invention

[0003] The present invention provides a puncture assembly, which is used to solve the problem in the prior art that the puncture depth of the puncture needle cannot be accurately controlled during operation and the operation is somewhat blind.

[0004] The present invention also provides a steam ablation device.

[0005] The puncture assembly provided by the present invention comprises:

[0006] a flexible tube for mounting to a working channel of an endoscope;

[0007] a fixed tube connected to the distal end of the flexible tube;

[0008] a puncture needle, movably installed in the fixed tube and the flexible tube;

[0009] a rope, threaded through the flexible tube;

[0010] A reversing mechanism is installed on the fixed tube, one end of the reversing mechanism is connected to the rope, and the other end of the reversing mechanism is connected to the distal end of the puncture needle, so as to drive the puncture needle to extend out of the fixed tube when the rope is subjected to tension.

[0011] According to an embodiment of the present application, the pulling of the rope is converted into the extension of the puncture needle through a reversing mechanism. Therefore, when operating the puncture assembly, there is no need to push the puncture needle. Instead, the pulling of the rope is converted into puncture of the puncture needle. Obviously, pulling the rope does not require too much force. And because the reversing mechanism is connected to the distal end of the puncture needle, it can avoid applying force that causes additional bending of the puncture needle and avoid loss of force, thereby accurately controlling the puncture action of the puncture needle and improving the accuracy of the puncture. The medical operator at the proximal end can accurately control the puncture depth of the puncture needle, making it easier for the medical operator to use.

[0012] According to an embodiment of the present invention, the reversing mechanism is a connecting rod mechanism, and the connecting rod mechanism includes:

[0013] a set of active connecting rods and a set of passive connecting rods;

[0014] a plurality of groups of intermediate connecting rods connected between the active connecting rod and the driven connecting rod, each group of the intermediate connecting rods including two connecting rods that cross each other and are rotatably connected, and the intermediate connecting rod close to the active connecting rod is rotatably connected to the fixed tube via a fixing pin;

[0015] The active connecting rod, the driven connecting rod and the intermediate connecting rod are connected by a movable pin. The proximal end of the active connecting rod is connected to the rope, and the distal end of the driven connecting rod is connected to the distal end of the puncture needle.

[0016] According to an embodiment of the present invention, the distal end of the puncture needle is fixedly connected to a fixed block, the fixed tube is provided with a set of relative sliding grooves, the fixed block is slidably installed between the sliding grooves, and the driven connecting rod is connected to the fixed block.

[0017] According to an embodiment of the present invention, a sealing cover is provided at the tube mouth of the fixed tube, and a reset member is provided between the active connecting rod and the sealing cover. When the rope is subjected to tension, the active connecting rod compresses the reset member. When the rope is released, the reset member drives the active connecting rod to move toward the fixed pin, and the driven connecting rod drives the distal end of the puncture needle to retract.

[0018] According to an embodiment of the present invention, the movable pin on the proximal end of the active connecting rod is connected to the rope, and the movable pin on the distal end of the driven connecting rod is connected to the distal end of the puncture needle.

[0019] and / or,

[0020] The movable pin on the proximal end of the active connecting rod is fixedly connected with a retaining ring, and the reset member is arranged between the retaining ring and the sealing cover.

[0021] According to an embodiment of the present invention, the puncture assembly further includes:

[0022] A main body, fixedly connected to the proximal end of the flexible tube, wherein a threading passage is formed inside the main body, and the rope and the puncture needle are both threaded through the threading passage;

[0023] The sliding operation part or the rotating operation part is connected to the main body and connected to the proximal end of the rope.

[0024] According to an embodiment of the present invention, a handle is provided at the proximal end of the main body, the handle is formed with a through hole for the thumb to pass through, and the sliding operating part is a sliding handle, and the sliding handle is formed with a clamping groove for the index finger and the middle finger to clamp.

[0025] According to an embodiment of the present invention, the main body includes a fixed section and an operating section connected to each other, the fixed section is connected to the proximal end of the flexible tube, and the proximal end of the puncture needle passes through the fixed section, and the sliding operating part is slidably connected to the operating section.

[0026] According to an embodiment of the present invention, the main body is provided with a scale corresponding to the sliding operation portion, and the scale indicates at least one of a sliding distance of the sliding operation portion and a puncture depth of the distal end of the puncture needle.

[0027] According to an embodiment of the present invention, a protective layer is provided on the outside of the flexible pipe.

[0028] and / or,

[0029] The flexible tube is a spring tube or a coiled tube.

[0030] The steam ablation device provided by the present invention includes:

[0031] an endoscope, formed with a working channel;

[0032] The puncture assembly is used to be installed in the working channel.

[0033] The steam ablation device according to the embodiment of the present invention includes the above-mentioned puncture assembly and thus has the technical effects of the above-mentioned puncture assembly, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are 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.

[0035] Figure 1 It is a schematic structural diagram of the puncture portion of the puncture assembly provided by the present invention.

[0036] Figure 2 It is a schematic diagram of the partial structure of the puncture part of the puncture assembly provided by the present invention.

[0037] Figure 3 It is a structural schematic diagram of the connecting rod mechanism provided by the present invention in an original state.

[0038] Figure 4 It is a structural schematic diagram of the connecting rod mechanism provided by the present invention in a stressed state.

[0039] Figure 5 Schematic diagram comparing the connecting rod mechanism provided by the present invention in the original state and the stressed state.

[0040] Figure 6 It is a structural schematic diagram of the execution part of the puncture assembly provided by the present invention.

[0041] Figure 7 It is a schematic structural diagram of the puncture assembly provided by the present invention.

[0042] Figure 8 It is a cross-sectional schematic diagram of the puncture assembly provided by the present invention.

[0043] Reference numerals:

[0044] 10. Puncture portion; 101. Fixed tube; 102. Flexible tube; 103. Protective layer; 104. Rope; 105. Fixed pin; 106. Reversing mechanism; 1061. Driven connecting rod; 1062. Intermediate connecting rod; 1063. Active connecting rod; 107. Puncture needle; 1071. Exhaust port; 108. Movable pin; 109. Stop ring; 110. Reset member; 111. Cover; 112. Fixed block; 113. Sliding pin;

[0045] 20. Executing part; 201. Fixed section; 2011. Mounting hole; 202. Sliding operating part; 2021. Clamping groove; 203. Operating section; 204. Handle; 2041. Mounting hole. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0047] To address the problem that a flexible puncture needle cannot be accurately operated even with an endoscope, this application proposes a puncture assembly, see Figure 1 and Figure 2The flexible tube 102 comprises a flexible tube 102, a fixed tube 101, a puncture needle 107, a cable 104, and a reversing mechanism 106. The flexible tube 102 is mounted to the working channel of an endoscope (not shown), ensuring that the puncture assembly can accommodate curved and straight working channels. The length of the flexible tube 102 matches that of the working channel to ensure that the puncture needle 107, after passing through the flexible tube 102, can ultimately exit the end of the working channel. The fixed tube 101 is connected to the distal end of the flexible tube 102 and allows for positioning of the distal end of the puncture needle 107. The "distal end" refers to the end that is inserted into the body, farther from the operator, and is therefore referred to as the "distal end," also known as the "insertion end." The proximal end, which corresponds to the distal end, is generally located outside the body and closer to the operator. Hereinafter, the terms "distal end" and "proximal end" will have the same meaning when referring to the puncture needle 107, the flexible tube 102, the driven connecting rod 1061, the active connecting rod 1063, and other components. The puncture needle 107 is movably mounted within the fixed tube 101 and the flexible tube 102, and can be installed into the working channel of the endoscope along with the flexible tube 102 and the fixed tube 101.

[0048] Based on the above, a rope 104 is installed in a flexible tube 102; a reversing mechanism 106 is installed in a fixed tube 101. One end of the reversing mechanism 106 is connected to the rope 104, and the other end of the reversing mechanism 106 is connected to the distal end of a puncture needle 107. When the rope 104 is pulled, the puncture needle 107 is driven out of the fixed tube 101. Generally, the proximal end of the reversing mechanism 106 is connected to the rope 104, and the distal end of the reversing mechanism 106 is connected to the puncture needle 107. Of course, since the specific type of reversing mechanism 106 is not limited, when the reversing mechanism 106 is not a typical slender structure, the reversing mechanism 106, the rope 104, and the distal end of the puncture needle 107 may also be in other orientations.

[0049] The puncture needle 107 in the embodiment of the present application can be an injection puncture needle for releasing steam into the human body. Of course, the puncture needle here can also be an injection puncture needle for injecting other fluids, and the puncture needle 107 can also be a biopsy puncture needle or a drainage puncture needle, etc., the specific type is not limited. Among them, steam ablation is a minimally invasive, safe and efficient ablation treatment method that has developed rapidly in recent years. This method converts sterile water into steam, and then injects the steam into the lesion tissue through a special puncture needle. The steam is used to inactivate the lesion tissue, and then apoptosis and necrosis are absorbed by the body, thereby achieving the corresponding therapeutic effect.

[0050] When the puncture needle 107 is a steam ablation needle, a plurality of exhaust ports 1071 are provided at the distal end of the puncture needle 107 for releasing steam. The steam enters the lesion along the ports and ablates the tissue. The position, size, and shape of the exhaust ports 1071 can be designed differently depending on the type of treatment. While the puncture needle 107 is generally used to release hot steam, it is not excluded that the steam may be generated by other means, such as ultrasonic treatment. The steam may carry different medicinal substances for different treatment types.

[0051] According to an embodiment of the present application, the pulling of the rope 104 is converted into the extension of the puncture needle 107 through the reversing mechanism 106. Therefore, when operating the puncture assembly, there is no need to push the puncture needle 107. Instead, the pulling of the rope 104 is converted into puncture of the puncture needle 107. Obviously, pulling the rope 104 does not require much force. And because the reversing mechanism 106 is connected to the distal end of the puncture needle 107, it can avoid applying force that causes the puncture needle 107 to produce additional bending and avoid force loss, thereby accurately controlling the puncture action of the puncture needle 107 and improving the accuracy of the puncture. The medical operator at the proximal end can accurately control the puncture depth of the puncture needle 107, making it easier for the medical operator to use.

[0052] The type of reversing mechanism 106 is not limited and can be any structure known in the art. For example, the reversing mechanism 106 can be a rack-and-pinion mechanism comprising a gear and two racks disposed on opposite sides of the gear. One rack is connected to the distal end of the puncture needle 107, and the other rack is connected to the cable 104. When the cable 104 pulls the rack on one side, the gear drives the rack on the other side to move in the opposite direction, converting the pulling of the cable 104 into insertion of the puncture needle 107. There can be multiple gears, including either a reduction gear or a speed-increasing gear, to control the transmission ratio between the two racks, thereby achieving a proportional relationship between the puncture needle's puncture depth and the travel distance of the cable 104. The proximal end of one rack can be connected to the cable 104, and the distal end of the other rack can be connected to the distal end of the puncture needle 107.

[0053] Figure 2In the embodiment, the reversing mechanism 106 is a connecting rod mechanism, which includes a group of active connecting rods 1063 and a group of driven connecting rods 1061 , and also includes several groups of intermediate connecting rods 1062 . Among them, the intermediate link 1062 is connected between the active link 1063 and the driven link 1061, and each group of intermediate links 1062 includes two links that are crossed and rotatably connected to each other. The intermediate link 1062 close to the active link 1063 is rotatably connected to the fixed tube 101 through a fixed pin 105; the active link 1063, the driven link 1061 and the intermediate link 1062 are connected by a movable pin 108, including a group of active links 1063 whose two links are connected by a movable pin 108, a group of driven links 1061 whose two links are connected by a movable pin 108, a group of intermediate links 1062 whose two links are connected by a movable pin 108, the active link 1063 and the intermediate link 1062 are connected by a movable pin 108, and the driven link 1061 and the intermediate link 1062 are connected by a movable pin 108.

[0054] According to an embodiment of the present application, the proximal end of the active link 1063 (i.e., the end away from the driven link 1061) is connected to the rope 104, and the distal end of the driven link 1061 (i.e., the end away from the active link 1063) is connected to the distal end of the puncture needle 107. The rope 104 can be connected to the movable pin 108 at the proximal end of the active link 1063, and the puncture needle 107 can be connected to the movable pin 108 at the distal end of the driven link 1061, thereby ensuring structural and force symmetry.

[0055] Figure 3 The middle reversing mechanism 106 is in the original state. Figure 4 The middle reversing mechanism 106 is in a stressed state. In its original state, both connecting rods in each connecting rod group (including the active connecting rod 1063, the driven connecting rod 1061, and the intermediate connecting rod 1062) are at a large angle to the horizontal. In the stressed state, both connecting rods in each connecting rod group are close to the horizontal direction, thereby stretching the reversing mechanism 106, allowing the reversing mechanism 106 to drive the puncture needle 107 to perform the puncture operation.

[0056] Among them, see Figure 5 When there are N sets of intermediate links 1062, each time the rope 104 is pulled one unit length, the reversing mechanism 106 is extended N units, which in turn drives the puncture needle 107 to extend N units. Thus, the proportional relationship between the puncture depth and the travel distance of the rope 104 can be adjusted by adjusting the number of sets of intermediate links 1062.

[0057] It should be noted that, since the fixed pin 105 needs to be connected to the fixed tube 101 , the fixed pin 105 is relatively long, while the movable pin 108 is relatively short, and only needs to satisfy the connection of the two connecting rods.

[0058] Figure 1 and Figure 2 In the embodiment, the distal end of the puncture needle 107 is fixedly connected to the fixed block 112, and the fixed tube 101 is provided with a set of relative sliding grooves. The fixed block 112 is slidably installed between the sliding grooves, and the driven connecting rod 1061 is connected to the fixed block 112. At this time, it is equivalent to the driven connecting rod 1061 being indirectly connected to the distal end of the puncture needle 107 through the fixed block 112. In this case, during the puncture process, the distal end of the puncture needle 107 will hardly bend, but will move along the preset path through the cooperation between the sliding groove and the fixed block 112, thereby ensuring the puncture accuracy. And since there are two sliding grooves, and they are relatively arranged to the fixed tube 101, the stability of the movement of the fixed block 112 can be ensured. Of course, only one sliding groove can also be provided, and the fixed block 112 moves along the sliding groove. Combined Figure 1 The fixed block 112 is provided with a sliding pin 113, and the sliding pin 113 is slidably installed in the sliding groove. Compared with the fixed block 112 being directly fixed to the sliding groove, this method can reduce the mass of the fixed block 112.

[0059] See Figure 1 As shown in Figure 2, a cover 111 is provided at the mouth of the fixed tube 101, and a reset member 110 is provided between the active connecting rod 1063 and the cover 111. When the rope 104 is subjected to tension, the active connecting rod 1063 compresses the reset member 110. When the rope 104 is released, the reset member 110 drives the active connecting rod 1063 toward the fixed pin 105, and the driven connecting rod 1061 drives the distal end of the puncture needle 107 to retract. The provision of the reset member 110 ensures the automatic retraction of the puncture needle 107. The reset member 110 here can be a spring or a silicone column. Of course, the location of the reset member 110 is not limited to between the active connecting rod 1063 and the cover 111. For example, the reset member can also be provided between the end surface of the fixed tube 101 and the driven connecting rod 1061. This reset member can also be a spring or a silicone column. When the rope 104 is subjected to tension, the driven connecting rod 1061 compresses the reset member 110 . When the rope 104 is released, the reset member 110 pushes the driven connecting rod 1061 to retract.

[0060] According to the embodiments of this application, see Figure 2 The movable pin 108 on one end of the active connecting rod 1063 away from the driven connecting rod 1061 is fixedly connected to a retaining ring 109, and the reset member 110 is arranged between the retaining ring 109 and the cover 111. The retaining ring 109 is provided to facilitate the installation and positioning of the reset member 110.

[0061] According to the embodiments of this application, see Figures 6 to 8 The puncture assembly also includes a main body (reference Figure 6 and Figure 8The main body is fixedly connected to the proximal end of the flexible tube 102, and the sliding operating part 202 is slidably connected to the main body, and the sliding operating part 202 is connected to the proximal end of the rope 104. The rope 104 is then pulled by the sliding operating part 202 to ensure the feel of the operation. It is obvious that a threading channel is formed inside the main body, and the rope 104 and the puncture needle 107 are both threaded through the threading channel to ensure that the rope 104 is connected to the sliding operating part 202, and the puncture needle 107 can pass through the threading channel. It should be noted that the shape of the sliding operating part 202 is not limited by the accompanying drawings. Figures 6 to 8 In this embodiment, the main body is cylindrical, and the sliding operating portion 202 is a sliding handle that is attached to the outside of the main body. Alternatively, the sliding operating portion 202 can be a dial button that is slidably mounted on one side of the main body. The flexible tube 102, fixed tube 101, puncture needle 107, cable 104, and reversing mechanism 106 are collectively referred to as the puncture unit 10; the main body, sliding operating portion 202, and handle 204 are collectively referred to as the actuator 20.

[0062] Alternatively, the puncture assembly further includes a main body and a rotating operating unit, the rotating operating unit being connected to the main body and connected to the proximal end of the rope 104. For example, the rotating operating unit can be a winding wheel that can rotate, and the rope 104 can be pulled by rotating the winding wheel, and the rope 104 can be wound around the winding wheel. A crank can be provided on the rotating operating unit to facilitate operation.

[0063] refer to Figure 8 The proximal end of the main body is provided with a handle 204 having a through-hole 2041 for the thumb to pass through. The sliding operation portion 202 is a sliding handle having a clamping groove 2021 for the index and middle fingers to grip. The operation gesture is as follows: the thumb passes through the through-hole 2041, and the index and middle fingers grip the sliding operation portion 202 through the clamping groove 2021, so that the index and middle fingers apply force to move the sliding operation portion 202.

[0064] Among them, see Figure 6 and Figure 8 The main body may include a fixed section 201 and an operating section 203 that are connected to each other. The fixed section 201 is connected to the proximal end of the flexible tube 102. The fixed section 201 is equivalent to a transition section, and its size gradually decreases in the direction from the operating section 203 to the flexible tube 102. The fixed section 201 can be used to pass the puncture needle 107. Specifically, an inclined insertion hole 2011 can be opened on the side wall of the fixed section 201 to facilitate the introduction and distribution of the puncture needle 107. The sliding operating part 202 is slidably connected to the operating section 203. The operating section 203 is designed for easy operation, and its size can be larger than the fixed section 201 to ensure structural strength.

[0065] According to an embodiment of the present application, the fixed section 201 and the operating section 203, as well as the operating section 203 and the handle 204, can be connected in a detachable manner, for example, by snap fastening. In this case, when the puncture assembly is not in use, the various components can be conveniently disassembled for easy storage. During use of the puncture assembly, the fixed section 201 and the operating section 203 are fixedly connected, the operating section 203 and the handle 204 are fixedly connected, and in addition, the flexible tube 102 and the fixed section 201 are fixedly connected, and the flexible tube 102 and the fixed tube 101 are fixedly connected.

[0066] Figure 7 In the embodiment, the main body is provided with a scale corresponding to the sliding operation portion 202. The scale markings enable medical personnel to directly determine the current puncture depth of the puncture needle 107. The scale markings may indicate at least one of the sliding distance of the sliding operation portion 202 and the puncture depth of the distal end of the puncture needle 107. That is, only one row of scale markings may be provided, and the scale markings may correspond to the sliding distance of the sliding operation portion 202. Alternatively, only one row of scale markings may be provided, and the scale markings may correspond to the puncture depth of the puncture needle 107. Alternatively, two rows of scale markings may be provided, one corresponding to the sliding distance of the sliding operation portion 202 and the other corresponding to the puncture depth of the puncture needle 107. The sliding distance of the sliding operation portion 202 and the puncture depth of the puncture needle 107 may be equal or proportional.

[0067] According to the embodiments of this application, reference Figure 1 A protective layer 103 may be provided on the exterior of the flexible tube 102 to further protect it. The protective layer 103 may be a resin layer 103, which is corrosion-resistant, wear-resistant, and flexible. Furthermore, the specific structure of the flexible tube 102 is not limited, as long as it can adapt to the curvature of the endoscope's working channel. For example, the flexible tube 102 may be a spring tube or a coiled tube.

[0068] An embodiment of the present application also provides a steam ablation device, including an endoscope and the aforementioned puncture assembly, wherein the endoscope is formed with a working channel; the fixing seat of the aforementioned puncture assembly is arranged corresponding to the distal end of the working channel, and the flexible tube 102 is installed in the passage.

[0069] The steam ablation device according to the embodiment of the present application can be combined with an endoscope to perform puncture under the guidance of the endoscope and deliver steam to the prostate hyperplasia area or other organs for thermal ablation. The endoscope here can be an ultrasonic endoscope, an electronic endoscope, or a fiber endoscope.

[0070] Currently, endoscopes have developed quite maturely as a means of direct inspection or auxiliary inspection, such as observation of lesions in human organs and acquisition of lesion tissues. Disease treatment with the assistance of endoscopes is developing rapidly. For example, laparoscopic cholecystectomy, but this surgical treatment is still a surgical treatment method, and the laparoscope is only used as an observation instrument, which is somewhat traumatic. Polypectomy under endoscope guidance is a minimally invasive treatment method. At this time, the endoscope is no longer just an observation instrument but also a surgical instrument. However, this type of treatment can only treat lesions on the surface of the natural cavity of the human body. The treatment of diseases outside the natural cavity under endoscope guidance is still in the early research stage, especially for the endoscope-guided hot steam ablation treatment of pancreatic lesions. There is currently no relevant research. The puncture assembly and steam ablation equipment proposed in this application greatly improve the operability of the treatment of diseases outside the natural cavity under endoscope guidance.

[0071] Ultrasound endoscopy, an advanced diagnostic tool that combines endoscopy and ultrasound technology, plays a vital role in clinical practice. Through endoscopy, doctors can directly observe morphological changes within organs (such as the digestive tract lumen). Simultaneously, real-time ultrasound scanning can capture histological features at the ductal level and ultrasound images of surrounding organs. Because this method significantly shortens the distance between the ultrasound probe and the target organ, it can obtain clearer and richer diagnostic information than X-rays, electronic endoscopy, and CT. With advances in therapeutic endoscopy technology and the widespread use of linear array ultrasound scanning probes, the role of ultrasound endoscopy in disease treatment has gradually gained recognition. Various ultrasound endoscopy interventional techniques have been widely used, enabling precise guidance of the puncture needle107 for puncture, significantly expanding the scope of interventional diagnosis and treatment. Ultrasound endoscopy is no longer simply an examination method; it has evolved into a clinical tool that integrates diagnosis and treatment.

[0072] Furthermore, an endoscope can be inserted into the bladder, joints, and other parts of the body for inspection, where the working channel structure is relatively simple. Of course, an endoscope can also be used to penetrate curved body parts, such as the gastrointestinal tract and bronchi, where the working channel of the endoscope needs to have certain curvature characteristics. As previously mentioned, the steam ablation device of the embodiment of the present application can also be used to treat benign prostatic hyperplasia.

[0073] The operation process of the puncture assembly of the present application is described below with reference to a specific embodiment:

[0074] by Figures 1 to 5Taking the middle direction as an example, when the operator pulls the rope 104 to the right, the fixed pin 105 is fixed, resulting in the connecting rod mechanism being fixed at the hinged position of the fixed pin 105. Under the action of the tension of the rope 104, the two active connecting rods 1063 will move to the right, driving the retaining ring 109 to compress the telescopic spring. Due to the inherent characteristics of the four-bar linkage (the connecting rod mechanism is equivalent to including several four-bar linkages), all the intermediate connecting rods 1062 and the driven connecting rod 1061 move to the left, eventually causing the driven connecting rod 1061 to move away from the active connecting rod 1063, that is, the end of the connecting rod mechanism moves in the opposite direction, driving the puncture needle 107 to extend out of the fixed tube 101, thereby performing the puncture action. When the puncture needle 107 needs to be retracted, the reset member 110 pushes the retaining ring 109 to the left. Under the action of the reset member 110, the two active connecting rods 1063 move to the left, and the driven connecting rod 1061 moves to the right. Under the action of the four-bar linkage, the puncture needle 107 will retract into the fixed tube 101.

[0075] like Figure 5 As shown, the linkage mechanism has N intermediate links 1062 (N being an integer such as 1, 2, 3, etc.). When the rope 104 moves one unit distance, the end of the driven link 1061 moves N units, thus achieving a 1:N ratio of tension distance to puncture depth. During operation, the puncture depth of the puncture needle 107 can be precisely controlled by simply controlling the distance traveled by the rope 104. Due to the characteristics of the four-bar linkage, the conventional puncture thrust is converted into the tension force of the rope 104 in this application, making it more operator-friendly.

[0076] During operation, the medical staff inserts their thumb into the through-hole 2041 of the handle 204 and uses their index and middle fingers to hold the sliding operation part 202 for one-handed operation. This causes the sliding operation part 202 to reciprocate along the main body, thereby driving the rope 104 to reciprocate, thereby causing the puncture needle 107 to perform the puncture action or retract the puncture needle 107 after the puncture is completed. Because the scale markings are provided on the outside of the main body, the sliding distance of the sliding operation part 202 can be clearly seen. Because the mechanism uses a four-bar linkage transmission, the extended length of the puncture needle 107 can be accurately calculated through conversion, which facilitates the operator to judge the puncture depth of the puncture needle 107.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A puncture assembly, characterized in that: include: a flexible tube (102) for mounting to a working channel of an endoscope; A fixed tube (101) connected to the distal end of the flexible tube (102); A puncture needle (107) is movably mounted in the fixed tube (101) and the flexible tube (102); A rope (104) is passed through the flexible tube (102); A reversing mechanism (106) is installed on the fixed tube (101), one end of the reversing mechanism (106) is connected to the rope (104), and the other end of the reversing mechanism (106) is connected to the distal end of the puncture needle (107), so as to drive the puncture needle (107) to extend out of the fixed tube (101) when the rope (104) is subjected to tension.

2. The puncture assembly according to claim 1, characterized in that: The reversing mechanism (106) is a connecting rod mechanism, and the connecting rod mechanism includes: a set of active connecting rods (1063) and a set of passive connecting rods (1061); A plurality of groups of intermediate connecting rods (1062) are connected between the active connecting rod (1063) and the driven connecting rod (1061), each group of the intermediate connecting rods (1062) includes two connecting rods that cross each other and are rotatably connected, and the intermediate connecting rod (1062) close to the active connecting rod (1063) is rotatably connected to the fixed tube (101) via a fixing pin (105); The active connecting rod (1063), the driven connecting rod (1061) and the intermediate connecting rod (1062) are connected via a movable pin (108). The proximal end of the active connecting rod (1063) is connected to the rope (104), and the distal end of the driven connecting rod (1061) is connected to the distal end of the puncture needle (107).

3. The puncture assembly according to claim 2, characterized in that: The distal end of the puncture needle (107) is fixedly connected to a fixed block (112), the fixed tube (101) is provided with a set of relative sliding grooves, the fixed block (112) is slidably mounted between the sliding grooves, and the driven connecting rod (1061) is connected to the fixed block (112).

4. The puncture assembly according to claim 2, characterized in that: A cover (111) is provided at the tube mouth of the fixed tube (101), and a reset member (110) is provided between the active connecting rod (1063) and the cover (111). When the rope (104) is subjected to tension, the active connecting rod (1063) compresses the reset member (110). When the rope (104) is released, the reset member (110) drives the active connecting rod (1063) to move toward the fixed pin (105), and the driven connecting rod (1061) drives the distal end of the puncture needle (107) to retract.

5. The puncture assembly according to claim 4, characterized in that: The movable pin (108) on the proximal end of the active link (1063) is connected to the rope (104), and the movable pin (108) on the distal end of the driven link (1061) is connected to the distal end of the puncture needle (107). and / or, The movable pin (108) on the proximal end of the active connecting rod (1063) is fixedly connected to a retaining ring (109), and the reset member (110) is arranged between the retaining ring (109) and the sealing cover (111).

6. The puncture assembly according to any one of claims 1 to 5, characterized in that: The puncture assembly further comprises: A main body is fixedly connected to the proximal end of the flexible tube (102), and a threading channel is formed inside the main body, and the rope (104) and the puncture needle (107) are both threaded through the threading channel; A sliding operating part (202) or a rotating operating part is connected to the main body and connected to the proximal end of the rope (104).

7. The puncture assembly according to claim 6, characterized in that: A handle (204) is provided at the proximal end of the main body, the handle (204) being formed with a through hole (2041) for the thumb to pass through, and the sliding operating portion (202) being a sliding handle, the sliding handle being formed with a clamping groove (2021) for the index finger and the middle finger to clamp.

8. The puncture assembly according to claim 6, characterized in that: The main body comprises a fixed section (201) and an operating section (203) connected to each other, wherein the fixed section (201) is connected to the proximal end of the flexible tube (102), and the proximal end of the puncture needle (107) passes through the fixed section (201), and the sliding operating portion (202) is slidably connected to the operating section (203).

9. The puncture assembly according to claim 6, characterized in that: The main body is provided with a scale corresponding to the sliding operation part (202), and the scale indicates at least one of the sliding distance of the sliding operation part (202) and the puncture depth of the distal end of the puncture needle (107).

10. The puncture assembly according to any one of claims 1 to 5, characterized in that: The flexible tube (102) is provided with a protective layer (103) on the outside. and / or, The flexible tube (102) is a spring tube or a coiled tube.

11. A steam ablation device, characterized in that: include: an endoscope, formed with a working channel; The puncture assembly according to any one of claims 1 to 10, adapted to be mounted to the working channel.

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