Puncture assembly and steam ablation equipment

Abstract

The invention provides a puncture assembly and steam ablation equipment. The puncture assembly comprises a flexible tube used for being mounted to a working channel of an endoscope; the fixed tube is connected to the far end of the flexible tube; the puncture needle is movably mounted in the fixed tube and the flexible tube; the rope penetrates through the flexible pipe; the reversing mechanism is mounted on the fixing tube, one end of the reversing mechanism is connected with the rope, and the other end of the reversing mechanism is connected with the far end of the puncture needle, so that the puncture needle is driven to extend out of the fixing tube when the rope is pulled. According to the puncture assembly, when the puncture assembly is operated, the puncture needle does not need to be pushed. And the reversing mechanism is connected with the far end of the puncture needle, so that extra bending of the puncture needle caused by force application and force loss can be avoided, the action of the puncture needle can be accurately controlled, and the puncture accuracy is improved. And a medical operator at the near end can accurately control the puncture depth of the puncture needle, so that the use of the medical operator is smoother.

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 the puncture action, a medical staff member applies a puncture force outside the body, and transmits the puncture force to the end of the puncture needle through the rigidity of the puncture needle itself, thereby performing the puncture action. It is well known that due to the structure of the human body's own organs, there will be multiple curved parts when the endoscope enters the human body, not a straight line. In order for the puncture needle to pass smoothly through the curved part of the endoscope, the puncture needle itself needs to be made relatively soft and have a certain bending ability. This causes the puncture needle to be in a curved state after entering the human body. When the medical staff performs the puncture action, there will be a large loss when the puncture force of the hand end is transmitted to the end of the puncture needle, so the puncture force applied by the hand end is usually larger. In addition, when the flexible puncture needle is subjected to force, it will become more curved, which will cause the distance advanced by the hand end to be inconsistent with 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 invention also provides a steam ablation device.

[0005] The puncture assembly provided according to the present invention comprises: a flexible tube for mounting to a 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, passed through the flexible tube; 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.

[0006] According to an embodiment of the present application, the pulling of the rope is converted into the extension of the puncture needle through the reversing mechanism. Therefore, when operating the puncture assembly, there is no need to push the puncture needle, but the pulling of the rope is converted into puncture of the puncture needle. Obviously, it does not take too much force to pull the rope. And because the reversing mechanism is connected to the distal end of the puncture needle, it can avoid applying force to cause additional bending of the puncture needle and avoid loss of force, so that the puncture action of the puncture needle can be accurately controlled to improve 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.

[0007] According to an embodiment of the present invention, the reversing mechanism is a connecting rod mechanism, and the connecting rod mechanism includes: a set of active connecting rods and a set of passive connecting rods; A plurality of groups of intermediate connecting rods are connected between the active connecting rod and the driven connecting rod, each group of the intermediate connecting rods comprises 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 through a fixing pin; 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.

[0008] 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.

[0009] 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, and 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.

[0010] 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. and / or, 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.

[0011] According to an embodiment of the present invention, the puncture assembly further includes: A main body, fixedly connected to the proximal end of the flexible tube, a threading channel is formed inside the main body, and the rope and the puncture needle are both threaded through the threading channel; The sliding operation part or the rotating operation part is connected to the main body and connected to the proximal end of the rope.

[0012] 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 operation 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.

[0013] 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.

[0014] 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 a distal end of the puncture needle.

[0015] According to an embodiment of the present invention, a protective layer is provided on the outside of the flexible pipe. and / or, The flexible tube is a spring tube or a coiled tube.

[0016] The steam ablation device provided by the present invention comprises: an endoscope formed with a working channel; The puncture assembly is used to be installed in the working channel.

[0017] 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

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces 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 creative work.

[0019] Figure 1 It is a schematic structural diagram of the puncture portion of the puncture assembly provided by the present invention.

[0020] Figure 2 It is a schematic diagram of the partial structure of the puncture part of the puncture assembly provided by the present invention.

[0021] Figure 3 It is a structural schematic diagram of the connecting rod mechanism provided by the present invention in an original state.

[0022] Figure 4It is a structural schematic diagram of the connecting rod mechanism provided by the present invention in a stress-bearing state.

[0023] Figure 5 It is a comparative schematic diagram of the connecting rod mechanism provided by the present invention in an original state and a stress-bearing state.

[0024] Figure 6 It is a schematic structural diagram of the execution part of the puncture assembly provided by the present invention.

[0025] Figure 7 It is a schematic structural diagram of the puncture assembly provided by the present invention.

[0026] Figure 8 It is a cross-sectional schematic diagram of the puncture assembly provided by the present invention.

[0027] Reference numerals: 10. puncture part; 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. retaining ring; 110. reset member; 111. cover; 112. fixed block; 113. sliding pin; 20. Executing part; 201. Fixed section; 2011. Mounting hole; 202. Sliding operating part; 2021. Clamping groove; 203. Operating section; 204. Handle; 2041. Perforation. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In order to solve the problem that the flexible puncture needle cannot be accurately operated even with an endoscope, the present application proposes a puncture assembly, see Figure 1 and Figure 2, including a flexible tube 102, a fixed tube 101, a puncture needle 107, a rope 104 and a reversing mechanism 106. Among them, the flexible tube 102 is used to be installed in the working channel of the endoscope (not shown in the figure), so as to ensure that the puncture assembly can adapt to the curved working channel, and naturally can also adapt to the straight working channel. The length of the flexible tube 102 is adapted to the length of the working channel to ensure that the puncture needle 107 passing through the flexible tube 102 can eventually extend from the end of the working channel. The fixed tube 101 is connected to the distal end of the flexible tube 102, and the distal end of the puncture needle 107 can be positioned by the fixed tube 101. Among them, the "distal end" is relative to the medical operator, and it needs to be inserted into the body. It is far away from the medical operator, so it is called the "distal end", that is, the "insertion end"; and the "proximal end" corresponding to the distal end is generally located outside the body and is closer to the medical operator. In the following text, the meanings of "distal end" and "proximal end" are the same for 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 installed in the fixed tube 101 and the flexible tube 102, and the puncture needle 107 can be installed in the working channel of the endoscope together with the flexible tube 102 and the fixed tube 101.

[0030] On the basis of the above, the rope 104 is installed in the flexible tube 102; the reversing mechanism 106 is installed in 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. 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 the reversing mechanism 106 is not limited, when the reversing mechanism 106 is an atypical slender structure, at this time, the reversing mechanism 106, the rope 104 and the distal end of the puncture needle 107 may also be in other orientation relationships.

[0031] 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., and 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 human body, thereby achieving the corresponding treatment effect.

[0032] 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, so that the steam enters the lesion along the hole to ablate the tissue. The position, size and shape of the exhaust ports 1071 can be designed differently according to different treatment types. Among them, the puncture needle 107 is generally used to release hot steam, but of course it does not exclude the situation that the steam is not hot steam obtained by heating, for example, it can be steam obtained by ultrasonic treatment. For different treatment types, different medicinal substances can be carried in the steam.

[0033] According to the 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, but the pulling of the rope 104 is converted into the puncture of the puncture needle 107. Obviously, it does not take much force to pull the rope 104. And because the reversing mechanism 106 is connected to the distal end of the puncture needle 107, it can avoid applying force to cause the puncture needle 107 to produce additional bending and avoid force loss, so that the puncture action of the puncture needle 107 can be accurately controlled to improve 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.

[0034] The type of the reversing mechanism 106 is not limited, and it can be any structural form disclosed in the prior art. For example, the reversing mechanism 106 can be a gear rack mechanism, which includes a gear and two racks arranged on opposite sides of the gear, one of the racks is connected to the distal end of the puncture needle 107, and the other rack is connected to the rope 104, so that when the rack on one side is pulled by the rope 104, the gear drives the rack on the other side to move in the opposite direction, so as to convert the pulling of the rope 104 into the puncture needle 107. The number of gears can be multiple, and a reduction gear or a speed increase gear can be included to control the transmission ratio between the two racks, so as to obtain a proportional relationship between the puncture depth of the puncture needle and the moving distance of the rope 104. The proximal end of one rack can be connected to the rope 104, and the distal end of the other rack can be connected to the distal end of the puncture needle 107.

[0035] 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 a plurality of groups of intermediate connecting rods 1062 . Among them, the intermediate connecting rod 1062 is connected between the active connecting rod 1063 and the driven connecting rod 1061, and each group of intermediate connecting rods 1062 includes two connecting rods that are crossed and rotatably connected to each other. The intermediate connecting rod 1062 close to the active connecting rod 1063 is rotatably connected to the fixed tube 101 through a fixed pin 105; the active connecting rod 1063, the driven connecting rod 1061 and the intermediate connecting rod 1062 are connected through a movable pin 108, including a group of active connecting rods 1063, wherein the two connecting rods are connected through a movable pin 108, a group of driven connecting rods 1061, wherein the two connecting rods are connected through a movable pin 108, a group of intermediate connecting rods 1062, wherein the two connecting rods are connected through a movable pin 108, the active connecting rod 1063 and the intermediate connecting rod 1062 are connected through a movable pin 108, and the driven connecting rod 1061 and the intermediate connecting rod 1062 are connected through a movable pin 108.

[0036] According to the 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 the symmetry of the structure and the force.

[0037] 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 the original state, the two connecting rods of each group of connecting rods (including the active connecting rod 1063, the driven connecting rod 1061 and the middle connecting rod 1062) have a large angle with the horizontal direction; in the stressed state, the two connecting rods of each group of connecting rods are close to the horizontal direction, and then the reversing mechanism 106 can be stretched, so that the reversing mechanism 106 drives the puncture needle 107 to perform the puncture action.

[0038] Among them, see Figure 5 When there are N groups of intermediate connecting rods 1062, each time the rope 104 is pulled by one unit length, the reversing mechanism 106 is stretched by N units, and the puncture needle 107 can be driven to extend by N units. Therefore, the proportional relationship between the puncture depth and the moving distance of the rope 104 can be adjusted by setting the number of groups of intermediate connecting rods 1062.

[0039] 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.

[0040] Figure 1 and Figure 2 In the embodiment, the distal end of the puncture needle 107 is fixedly connected to the fixed block 112, 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 a 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 may be provided, and the fixed block 112 moves along the sliding groove. Combined with 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.

[0041] See also Figure 1 As shown in FIG2 , 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 to move toward the fixed pin 105, and the driven connecting rod 1061 drives the distal end of the puncture needle 107 to retract. The automatic retraction of the puncture needle 107 is ensured by the setting of the reset member 110. The reset member 110 here can be a spring or a silicone column. Of course, the setting position of the reset member 110 is not limited to between the active connecting rod 1063 and the cover 111. For example, a reset member can also be provided between the end surface of the fixed tube 101 and the driven connecting rod 1061, and the 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 , and when the rope 104 is released, the reset member 110 pushes the driven connecting rod 1061 to retract.

[0042] According to the embodiments of the present 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 with 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 limiting of the reset member 110.

[0043] 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 the embodiment, the main body is cylindrical, and the sliding operation part 202 is a sliding handle mounted on the outside of the main body. In addition, the sliding operation part 202 can also be a dial button slidably mounted on one side of the main body. The above flexible tube 102, fixed tube 101, puncture needle 107, rope 104 and reversing mechanism 106 are collectively referred to as the puncture part 10; the main body, sliding operation part 202 and handle 204 are collectively referred to as the execution part 20.

[0044] Alternatively, the puncture assembly further includes a main body and a rotating operation part, the rotating operation part is connected to the main body and connected to the proximal end of the rope 104. For example, the rotating operation part can be a winding wheel, and the winding wheel can rotate by itself, 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 operation part to facilitate operation.

[0045] refer to Figure 8 The proximal end of the main body is provided with a handle 204, the handle 204 is formed with a through hole 2041 for the thumb to pass through, and the sliding operation part 202 is a sliding handle, and the sliding handle is formed with a clamping groove 2021 for the index finger and the middle finger to clamp. Then, the gesture during operation is: the thumb passes through the through hole 2041, and the index finger and the middle finger clamp the sliding operation part 202 through the clamping groove 2021, so that the sliding operation part 202 is moved by applying force with the index finger and the middle finger.

[0046] Among them, see Figure 6 and Figure 8 The main body may include a fixed section 201 and an operating section 203 connected to each other, and 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 from the operating section 203 to the flexible tube 102. And the fixed section 201 can be used for the insertion of 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 extraction 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.

[0047] 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 a buckle. In this case, when the puncture assembly is not in use, the various components can be conveniently disassembled for easy storage. During the 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.

[0048] Figure 7 In the embodiment, the main body is provided with a scale corresponding to the sliding operation part 202, and the scale mark is used to facilitate the medical operator to directly determine the current puncture depth of the puncture needle 107. The scale mark can mark 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. That is, only one row of scale marks can be set, and the scale marks correspond to the sliding distance of the sliding operation part 202. Alternatively, only one row of scale marks can be set, and the scale marks correspond to the puncture depth of the puncture needle 107. Alternatively, two rows of scale marks can be set, corresponding to the sliding distance of the sliding operation part 202 and the puncture depth of the puncture needle 107, respectively. The sliding distance of the sliding operation part 202 and the puncture depth of the puncture needle 107 can be equal, or there can be a proportional relationship.

[0049] According to the embodiments of the present application, reference Figure 1 A protective layer 103 may be provided outside the flexible tube 102 to provide more adequate protection for the flexible tube 102. The protective layer 103 here may be a resin protective layer 103, which has the effects of corrosion resistance, wear resistance, and flexibility. In addition, the specific structural form of the flexible tube 102 is not limited, as long as it can adapt to the bending of the working channel of the endoscope. For example, the flexible tube 102 may be a spring tube or a coiled tube.

[0050] The embodiment of the present application also provides a steam ablation device, including an endoscope and the aforementioned puncture assembly, 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.

[0051] 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.

[0052] At present, endoscopes have been developed quite maturely as a direct inspection method or auxiliary inspection method, such as observation of human organ lesions, acquisition of lesion tissues, etc. Endoscopically assisted disease treatment is developing rapidly. For example, laparoscopic cholecystectomy, but this surgical treatment still belongs to surgical treatment methods, and the laparoscope is only used as an observation instrument, which is somewhat traumatic. Polypectomy under endoscopic guidance and other minimally invasive treatment methods are used. 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 the guidance of an endoscope is still in the early research stage, especially for the endoscopically guided thermal 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 the guidance of an endoscope.

[0053] Among them, ultrasound endoscopy is an advanced diagnostic tool that combines endoscopy and ultrasound technology, and it plays a vital role in clinical work. Through endoscopy, doctors can directly observe the morphological changes in organs (such as the digestive tract lumen), and at the same time, real-time ultrasound scanning can obtain the histological characteristics of the duct layer and the ultrasound images of the surrounding adjacent organs. Since this method greatly shortens the distance between the ultrasound probe and the target organ, it can obtain clearer and richer diagnostic information than X-rays, electronic endoscopes and CT. With the advancement of therapeutic endoscopy technology and the widespread use of linear array ultrasound scanning probes, the role of ultrasound endoscopy in disease treatment has gradually received attention. Various ultrasound endoscopy interventional techniques have been widely used, which can accurately guide the puncture needle 107 for puncture, thereby greatly increasing the scope of interventional diagnosis and treatment. Ultrasound endoscopy is no longer just an inspection method, but has developed into a clinical method that integrates diagnosis and treatment.

[0054] In addition, the endoscope can be inserted into the bladder, joints and other parts for inspection, and the working channel structure is relatively simple at this time; of course, the endoscope can also be used to penetrate into curved parts of the body, such as the gastrointestinal tract and bronchi, and the working channel of the endoscope needs to have certain bending characteristics. As mentioned above, the steam ablation device of the embodiment of the present application can also be used to treat prostate hyperplasia.

[0055] The operation process of the puncture assembly of the present application is described below in conjunction with a specific embodiment: by Figures 1 to 5Taking the middle direction as an example, when the operator pulls the rope 104 to the right, since the fixed pin 105 is fixed, the connecting rod mechanism is also fixed at the hinge position where the fixed pin 105 is located. Under the action of the pulling force of the rope 104, the two active connecting rods 1063 will move to the right direction to drive 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 direction, which eventually causes 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 connecting rod, the puncture needle 107 will be retracted into the fixed tube 101.

[0056] like Figure 5 As shown, the number of the intermediate links 1062 of the link mechanism is N (N is an integer 1, 2, 3, ...), when the rope 104 moves 1 unit distance, the end of the driven link 1061 will move N unit distances, so the 1:N transmission of the stretching distance and the puncture depth can be achieved. During operation, the puncture depth of the puncture needle 107 can be accurately controlled by accurately controlling the distance moved by the rope 104. Due to the characteristics of the four-bar linkage, the traditional puncture thrust is converted into the tensile force of the rope 104 in this application, which is more friendly to the actual operation of the operator.

[0057] During operation, the medical staff inserts the thumb into the perforation 2041 of the handle 204, and clamps the sliding operation part 202 with the index finger and the middle finger to operate with one hand, so that the sliding operation part 202 reciprocates along the main body, thereby driving the rope 104 to reciprocate, and then the puncture needle 107 performs the puncture action or completes the puncture and retracts the puncture needle 107. Since the scale mark line is set on the outside of the main body, the sliding distance of the sliding operation part 202 can be clearly seen, and since the mechanism adopts a four-link transmission, the extended length of the puncture needle 107 can be accurately known after conversion, which is convenient for the operator to judge the puncture depth of the puncture needle 107.

[0058] 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 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) 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 comprises: a set of active connecting rods (1063) and a set of passive connecting rods (1061); A plurality of groups of intermediate connecting rods (1062) connected between the active connecting rod (1063) and the driven connecting rod (1061), each group of the intermediate connecting rods (1062) comprising 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 fixing block (112), the fixing tube (101) is provided with a group of relative sliding grooves, the fixing block (112) is slidably mounted between the sliding grooves, and the driven connecting rod (1061) is connected to the fixing block (112).

4. The puncture assembly according to claim 2, characterized in that: A sealing 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 sealing 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 connecting rod (1063) is connected to the rope (104), and the movable pin (108) on the distal end of the driven connecting rod (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 also includes: A main body, fixedly connected to the proximal end of the flexible tube (102), a threading channel being formed inside the main body, and the rope (104) and the puncture needle (107) are both threaded through the threading channel; A sliding operation part (202) or a rotating operation part is connected to the main body and is 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 operation portion (202) is 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) which are connected to each other, the fixed section (201) being connected to the proximal end of the flexible tube (102), and the proximal end of the puncture needle (107) protruding from the fixed section (201), and the sliding operating portion (202) being 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 portion (202), and the scale indicates 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).

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 is used to be installed in the working channel.

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