Biliary tract interventional surgical instrument integrated with envelope liquid electro-lithotripsy function

Abstract

The invention discloses a biliary tract interventional surgical instrument integrated with an envelope liquid electric lithotripsy function. The biliary tract interventional surgical instrument comprises a handle, a hose and an envelope mechanism which are connected in sequence, the handle is provided with an adjusting hand wheel, the adjusting hand wheel is connected with a flexible push rod, the flexible push rod penetrates through the hose to be connected with the enveloping mechanism, and the adjusting hand wheel is used for controlling the flexible push rod to control the enveloping mechanism to be switched between the folding state and the unfolding state; an endoscope probe is arranged at the end, close to the enveloping mechanism, of the hose, the interior of the hose is communicated with the interior of the handle to form a guide channel, and the guide channel is used for allowing the electro-hydraulic lithotripsy probe to be inserted and extends out of the end, close to the enveloping mechanism, of the hose; the enveloping mechanism surrounds the extending position of the electro-hydraulic lithotripsy probe; after the scheme is adopted, the effects of stably restraining the calculus, safely and accurately crushing the calculus and monitoring the treatment process in real time can be achieved.

Description

Technical Field

[0001] This invention relates to the technical field of surgical instruments, and in particular to a biliary interventional surgical instrument that integrates envelope hydro-electro-lithotomy function. Background Technology

[0002] In the treatment of biliary stones, electrohydraulic lithotripsy and stone retrieval baskets are two commonly used techniques. However, existing techniques have significant drawbacks: simple stone retrieval baskets are difficult to effectively grasp large or impacted stones, and forcibly dragging them can easily cause tissue damage; while in electrohydraulic lithotripsy, the stones are prone to displacement due to the lack of stable restraint, resulting in the inability to concentrate the fragmentation energy, low efficiency, and the shock wave may cause accidental damage to the surrounding bile duct wall.

[0003] Existing solutions that attempt to combine the two (such as CN212592310U) integrate the lithotripsy guide wire into the basket sheath, but in essence, they are still a simple superposition of the two functions and fail to solve the fundamental problem.

[0004] Firstly, its basket structure cannot dynamically adapt to changes in stone volume during the stone fragmentation process, which can easily lead to the escape of small fragments and the formation of new obstruction sources.

[0005] Secondly, its lithotripsy guidewire extends from the side, resulting in poor positioning accuracy and posing a significant risk of damaging the bile duct wall.

[0006] Third, the entire operation process lacks visualized real-time feedback and fine control, making it impossible to achieve a precision medicine closed loop of "assessment-treatment-reassessment".

[0007] Therefore, there is an urgent clinical need for an integrated device that can achieve stable stone restraint, safe and precise stone fragmentation, and real-time monitoring of the treatment process. Summary of the Invention

[0008] The purpose of this invention is to provide a biliary interventional surgical instrument that integrates envelope hydro-electro-lithotomy function, so as to achieve stable stone restraint, safe and precise stone fragmentation, and real-time monitoring of the treatment process.

[0009] To address the aforementioned technical problems, this invention provides a biliary interventional surgical instrument integrating enveloping electrohydraulic lithotripsy, comprising a handle, a tubing, and an enveloping mechanism connected sequentially. The handle is equipped with an adjusting handwheel connected to a flexible push rod, which passes through the tubing and connects to the enveloping mechanism. The adjusting handwheel controls the flexible push rod to switch the enveloping mechanism between retraction and extension states. An endoscope probe is located at one end of the tubing adjacent to the enveloping mechanism, and the interior of the tubing communicates with the interior of the handle to form a guide channel. This guide channel allows the electrohydraulic lithotripsy probe to be inserted and extends from the end of the tubing adjacent to the enveloping mechanism. The enveloping mechanism surrounds the extended portion of the electrohydraulic lithotripsy probe.

[0010] In one embodiment, the rotation of the adjustment handwheel is used to control the flexible push rod to move in or out of the hose, and the movement of the flexible push rod is used to control the envelope mechanism to switch between retraction and extension states.

[0011] In one embodiment, the handle is elongated; the rotation axis of the adjusting handwheel is consistent with the axis of the handle; the interior of the adjusting handwheel is hollow; the interior of the adjusting handwheel is connected to the flexible hose; a threaded rod is threadedly connected inside the adjusting handwheel; and the threaded rod is fixedly connected to the flexible push rod.

[0012] In one embodiment, the envelope mechanism includes shape memory alloy elastic rods, a flexible envelope surface, a central rod, and a connecting ring; one end of multiple shape memory alloy elastic rods is connected to each other so that the multiple shape memory alloy elastic rods are connected radially, and the other end of each of the multiple shape memory alloy elastic rods is connected to the connecting ring, and the flexible envelope surface is connected between any two adjacent shape memory alloy elastic rods; one end of the central rod is connected to the common connection point of the multiple shape memory alloy elastic rods, and the other end of the central rod passes through the connecting ring and is connected to the flexible push rod; the connecting ring is used to abut against the end face of the hose.

[0013] In one embodiment, the shape memory alloy elastic rod is a nickel-titanium alloy elastic rod.

[0014] The beneficial effects of this invention are as follows: 1. High degree of treatment thoroughness: The innovative encapsulation mechanism ensures effective restraint throughout the entire process, from large stones to small fragments, greatly reducing the risk of obstruction caused by residual fragments after surgery.

[0015] 2. Excellent surgical safety: The enveloping mechanism surrounds the electrohydraulic lithotripsy probe, physically isolating the treatment area from healthy tissue, minimizing tissue damage and improving surgical safety.

[0016] 3. Precise and controllable operation: After setting the endoscope probe, the combination of visualization and precision mechanical transmission is realized, enabling doctors to make decisions based on real-time images, achieving personalized and phased precision treatment, and improving the success rate of surgery. Attached Figure Description

[0017] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure provided in an embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the internal structure of the handle; Figure 3 yes Figure 1 A schematic diagram of the unfolded structure of the envelope mechanism; Figure 4 yes Figure 1 A schematic diagram of the envelope mechanism's convergence structure; Figure 5 yes Figure 3 A schematic diagram of the connecting ring structure.

[0019] The attached figures are labeled as follows: 100. Handle; 110. Adjusting handwheel; 120. Flexible push rod; 130. Threaded rod; 140. Annular groove; 200. Hose; 300. Envelope mechanism; 310. Shape memory alloy elastic rod; 320. Flexible envelope surface; 330. Central rod; 340. Connecting ring; 341. Perforation; 400. Endoscope probe; 500. Electrohydraulic lithotripsy probe. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0021] This invention provides a biliary interventional surgical instrument integrating envelope hydro-electro-lithotomy function, the implementation of which is as follows: Figure 1 As shown, it includes a handle 100, a hose 200, and an envelope mechanism 300 connected in sequence.

[0022] Regarding the handle 100, as Figure 1 As shown, in this embodiment, the handle 100 is provided with an adjustment handwheel 110, and the adjustment handwheel 110 is connected to a flexible push rod 120. The flexible push rod 120 passes through the hose 200 and is connected to the envelope mechanism 300. The adjustment handwheel 110 is used to operate the flexible push rod 120 to control the envelope mechanism 300 to switch between the expansion and contraction states.

[0023] Specifically, in this embodiment, the rotation of the adjusting handwheel 110 is used to control the movement of the flexible push rod 120 into or out of the hose 200, so that the movement of the flexible push rod 120 is used to control the enveloping mechanism 300 to switch between its expansion and contraction states, such as... Figure 1 and Figure 2As shown, in this embodiment, the handle 100 is elongated; and the rotation axis of the adjusting handwheel 110 is aligned with the axis of the handle 100. The interior of the adjusting handwheel 110 is hollow, and the interior of the adjusting handwheel 110 is connected to the hose 200. A threaded rod 130 is threadedly connected to the interior of the adjusting handwheel 110, and the threaded rod 130 is connected and fixed to the flexible push rod 120.

[0024] After adopting the above setting method, the handle 100 will be provided with a corresponding annular groove 140 at its end so that the adjusting handwheel 110 can be installed with the annular groove 140 in a way that can rotate in a fixed position. Therefore, once the operator controls the adjusting handwheel 110 to rotate, the threaded rod 130 will move toward or away from the hose 200, thereby realizing the control of the flexible push rod 120 moving into or out of the hose 200.

[0025] Regarding the hose 200, as Figure 1 and Figure 4 As shown, in this embodiment, an endoscope probe 400 is provided at one end of the flexible tube 200 adjacent to the envelope mechanism 300, and the inside of the flexible tube 200 is connected to the inside of the handle 100 to form a guide channel. At this time, the guide channel passes through both ends of the handle and communicates with the flexible tube 200, so that the guide channel can be used to insert the electrohydraulic lithotripsy probe 500 and extend it from one end of the flexible tube 200 adjacent to the envelope mechanism 300.

[0026] Obviously, the aforementioned flexible tube 200 is mainly used to protect and guide various devices, so there are no special restrictions on its design requirements. It is only necessary to select materials that meet the requirements of medical instruments and make it into an appropriate size.

[0027] Regarding the envelope mechanism 300, such as Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, the envelope mechanism 300 surrounds the extended position of the electrohydraulic lithotripsy probe 500. Specifically, the envelope mechanism 300 includes shape memory alloy elastic rods 310, flexible envelope surfaces 320, a central rod 330, and a connecting ring 340. One end of multiple shape memory alloy elastic rods 310 is connected to each other, so that the multiple shape memory alloy elastic rods 310 are connected radially. The other end of each of the multiple shape memory alloy elastic rods 310 is connected to the connecting ring 340, and a flexible envelope surface 320 is connected between any two adjacent shape memory alloy elastic rods 310. In this embodiment, the shape memory alloy elastic rods 310 are nickel-titanium alloy elastic rods. One end of the central rod 330 is connected to the common connection point of the multiple shape memory alloy elastic rods 310, and the other end of the central rod 330 passes through the connecting ring 340 and is connected to the flexible push rod 120. The connecting ring 340 is used to abut against the end face of the hose 200.

[0028] For example, if the flexible push rod 120 is moved into the interior of the tubing 200, the flexible push rod 120 will use the central rod 330 to drive the entire enveloping mechanism 300 to move until the connecting ring 340 abuts against the end face of the tubing 200. At this time, if the flexible push rod 120 is continued to move into the interior of the tubing 200, the pushing force applied by the central rod 330 to the multiple shape memory alloy elastic rods 310 will be weakened. Therefore, the bile duct in the surgical area will apply pushing force to the multiple shape memory alloy elastic rods 310, thereby causing the enveloping mechanism 300 to become a state of enveloping the gallstones.

[0029] Conversely, if the flexible push rod 120 is moved out of the hose 200, the flexible push rod 120 will apply sufficient thrust to the multiple shape memory alloy elastic rods 310, thereby causing the enveloping mechanism 300 to extend to meet the enveloping requirements of gallstones of various sizes.

[0030] Furthermore, since the envelope mechanism 300 surrounds the extended position of the electrohydraulic lithotripsy probe 500, it can physically isolate the treatment area from healthy tissue, minimizing tissue damage and improving surgical safety.

[0031] Furthermore, to achieve the positioning and installation of the endoscope probe 400 and the electrohydraulic lithotripsy probe 500, such as... Figure 5 As shown, this embodiment has a plurality of through holes 341 arranged circumferentially on the connecting ring 340 so that various corresponding appliances can be installed in the corresponding through holes 341.

[0032] The specific operation process of this embodiment is roughly as follows: 1. Delivery and Positioning: With the envelope mechanism retracted at 30°, the instrument is inserted into the bile duct. The doctor observes the intraluminal situation in real time through the endoscope probe at 40° and navigates to the location of the stone.

[0033] 2. Visual Envelope: Rotate the adjustment handwheel 110 to control the threaded rod 130 to move linearly, slowly control the envelope mechanism 300 to unfold, and observe the image at the same time to control the degree of unfolding until the stone is stably enveloped in the envelope mechanism 300.

[0034] 3. Centering and safe lithotripsy: Insert the electrohydraulic lithotripsy probe 500 into the handle 100 and guide it along the guide channel to ensure that it extends into the area enclosed by the envelope mechanism 300. Under the protection of the "safety barrier", start lithotripsy.

[0035] 4. Assessment and Retreatment: The stone fragmentation is observed in real time through the endoscopic probe at 400°. If larger fragments are found, their positions can be finely adjusted to add more fragments. The gaps between the fragments can be flushed through the instrument channel to maintain a clear view.

[0036] 5. Safe withdrawal: After confirming that the stones have been fully crushed, rotate the adjusting handwheel 110 to retract the envelope mechanism 300 and withdraw the entire device.

[0037] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A biliary interventional surgical instrument integrating envelope hydro-electro-lithotomy function, characterized in that, Includes a handle, a hose, and an envelope mechanism connected in sequence; The handle is equipped with an adjustment handwheel, which is connected to a flexible push rod. The flexible push rod passes through the hose and is connected to the envelope mechanism. The adjustment handwheel is used to operate the flexible push rod to control the envelope mechanism to switch between the expansion and contraction states. An endoscope probe is provided at one end of the hose adjacent to the envelope mechanism, and the inside of the hose communicates with the inside of the handle to form a guide channel. The guide channel is used for the insertion of the electrohydraulic lithotripsy probe and for it to extend from the end of the hose adjacent to the envelope mechanism. The envelope mechanism surrounds the extended portion of the electrohydraulic lithotripsy probe.

2. The biliary interventional surgical instrument according to claim 1, characterized in that, The rotation of the adjustment handwheel is used to control the flexible push rod to move in or out of the hose, and the movement of the flexible push rod is used to control the envelope mechanism to switch between expansion and contraction states.

3. The biliary interventional surgical instrument according to claim 2, characterized in that, The handle is elongated; The rotation axis of the adjusting handwheel is consistent with the axis of the handle. The interior of the adjusting handwheel is hollow and connected to the flexible hose. A threaded rod is threadedly connected inside the adjusting handwheel, and the threaded rod is fixedly connected to the flexible push rod.

4. The biliary interventional surgical instrument according to claim 2, characterized in that, The envelope mechanism includes a shape memory alloy elastic rod, a flexible envelope surface, a central rod, and a connecting ring; One end of each of the multiple shape memory alloy elastic rods is connected to the other end of each rod in a radial configuration. The other end of each rod is connected to the connecting ring, and the flexible envelope is connected between any two adjacent rods. One end of the central rod is connected to the common connection point of the multiple shape memory alloy elastic rods, and the other end of the central rod passes through the connecting ring and is connected to the flexible push rod; The connecting ring is used to abut against the end face of the hose.

5. The biliary interventional surgical instrument according to claim 4, characterized in that, The shape memory alloy elastic rod is a nickel-titanium alloy elastic rod.

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