Multifunctional ureter guiding sheath

Abstract

The invention discloses a multifunctional ureter guiding sheath, and relates to the technical field of urological surgical instruments, the multifunctional ureter guiding sheath comprises a handle, a sheath tube and a magnetic pole net film, the sheath tube is coaxially arranged in the handle in a penetrating manner; the magnetic pole net film is located at one end of the sheath and used for wrapping the end of the sheath. The magnetic pole net film comprises a magnetic pole ring block, a sensing wire, a position sensor and a thin film, the thin film wraps the end of the sheathing canal to form a spherical surrounding structure, the magnetic pole ring block is arranged at the end of the spherical surrounding structure formed by the thin film, and the magnetic pole ring block is provided with an opening coaxial with the sheathing canal. A cavity formed in the thin film is communicated with the opening of the magnetic pole ring block and the internal space of the sheath tube, the position sensors are distributed in the cavity formed by the thin film at intervals, and the position sensors are used for recording and feeding back position information of the front end of the guide sheath in real time. The guide sheath positioning device has the effect of improving the guide sheath positioning efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of urological surgical instruments, and in particular to a multifunctional ureteral guide sheath. Background Art

[0002] The ureteral introducer sheath is a common medical device used in urological internal medicine surgeries, especially in percutaneous nephroscopic or ureteroscopic surgeries. Its main function is to provide a channel for doctors to insert other tools (such as nephroscopes, ureteroscopes, laser fibers, etc.) to treat or diagnose patients, especially when the ureters and kidneys need to be operated.

[0003] Under general or local anesthesia, the doctor inserts the ureteral guide sheath into the ureter through the urethra or bladder. The guide sheath passes through the ureter into the kidney or ureteral lesion area, providing a stable channel for the doctor to easily enter the target area without damaging the urinary tract wall. The space inside the guide sheath is large enough to accommodate an endoscope or other treatment equipment, through which the doctor can observe the lesion and perform treatment. Different medical devices can be inserted multiple times for treatment, avoiding the trauma caused by repeated insertion of the catheter.

[0004] Conventional ureteral guide sheaths require the help of external instruments to help position them. After positioning is completed, instruments need to be switched to complete subsequent surgical operations. The entire process of positioning and replacing instruments will make the surgical operation more complicated, increase the operation time, and bring an uncomfortable surgical experience to patients. Summary of the invention

[0005] In order to improve the situation where conventional ureteral guide sheaths need to be positioned with the help of external instruments, which makes the surgical procedure more complicated and increases the operation time, the present application provides a multifunctional ureteral guide sheath.

[0006] The present application provides a multifunctional ureteral guide sheath, which adopts the following technical solution: A multifunctional ureteral guide sheath comprising A handle, wherein the handle is hollow inside; A sheath tube, wherein the sheath tube is coaxially inserted into the handle and both ends extend out of the handle, the sheath tube is fixed relative to the handle, the internal space of the sheath tube is used for surgical instruments to pass through, and the outer sheath tube is provided with a plurality of developing rings; A magnetic pole mesh film is located at one end of the sheath tube and is used to wrap the end of the sheath tube; The magnetic pole mesh film includes a magnetic pole ring block, a sensing wire, a position sensor, and a film. The film is coated on the end of the sheath tube to form a spherical surrounding structure. The magnetic pole ring block is arranged at the end of the spherical surrounding structure formed by the film. The magnetic pole ring block is provided with an opening coaxial with the sheath tube. The cavity formed inside the film connects the opening of the magnetic pole ring block with the internal space of the sheath tube. There are multiple position sensors, which are distributed at intervals inside the cavity formed by the film. The position sensor is used to record and feedback the position information of the front end of the guide sheath in real time. One end of the sensing wire is electrically connected to each position sensor, and the other end of the sensing wire passes through the sheath tube and is provided with a sensing wire external interface for an external display device.

[0007] Optionally, a rotating paddle is provided at one end of the handle close to the magnetic pole mesh, and the rotating paddle is sleeved outside the sheath and can slide along the length direction of the sheath. Two first traction wires are movably arranged in the sheath, and the two first traction wires are symmetrically distributed relative to the axis of the sheath. One end of the first traction wire is fixed to the rotating paddle, and the other end is fixed to the magnetic pole ring block. The rotating paddle drives the magnetic pole ring block to close the opening formed by itself through the first traction wire.

[0008] Optionally, a magnetic pole wire is provided in the sheath tube, a battery and a relay are provided in the handle, the battery is electrically connected to the relay, one end of the magnetic pole wire is electrically connected to the relay, and the other end is electrically connected to the magnetic pole ring block, a magnetic switch is provided on the handle, and the magnetic switch is electrically connected to the relay, and the magnetic pole ring block can be attracted to close the opening formed by itself after power is supplied.

[0009] Optionally, the sheath has three layers from the inside to the outside, and all are made of deformable elastic material, the sensing wire and the magnetic pole wire are wrapped outside the bottom layer material of the sheath, the first traction wire is wrapped outside the middle layer material, and the developing ring is arranged outside the outermost layer material of the sheath.

[0010] Optionally, a rotational bending mechanism and a telescopic locking mechanism are provided in the handle, wherein the rotational bending mechanism is used to drive the sheath to bend to one side while rotating, and the telescopic locking mechanism is used to lock the rotational bending mechanism to limit the rotation and bending of the sheath.

[0011] Optionally, the rotation and bending mechanism includes a special curved step column and a guide straight rod, the special curved step column is sleeved and fixed outside the sheath, and is rotatably connected to the handle, a special curved groove is provided on the outer wall of the special curved step column, one end of the guide straight rod is inserted into the handle along the axial direction perpendicular to the special curved step column, and is slidably connected to the special curved groove, a limited through groove is provided on the outer wall of the handle along its own length direction, and the rod body of the guide straight rod is slidably connected to the limited through groove, and the guide straight rod can drive the special curved step column to rotate during the sliding process along the limited through groove.

[0012] Optionally, a guide ring is disposed outside the special curved step column and slidably connected thereto, and one end of the guide straight rod located inside the handle passes through the side wall of the guide ring. A second traction wire is movably arranged inside the sheath, and one end of the second traction wire is fixed to the end surface of the guide ring close to the magnetic pole reticular membrane, and the other end of the second traction wire is fixed to the end of the sheath away from the handle.

[0013] Optionally, a connecting column is sleeved on one end of the special curved step column away from the magnetic pole mesh membrane, and the connecting column is made of soft material. One end of the special curved step column is rotatably connected to the connecting column, and the connecting column is fixed relative to the handle. The telescopic locking mechanism includes two groups of locking rods, and the two groups of locking rods are symmetrically distributed on both radial sides of the connecting column along the axis of the connecting column. The locking rods are slidably connected to the inside of the handle along a direction perpendicular to the axis of the connecting column. The two groups of locking rods can simultaneously press against the outer wall of the connecting column from both sides when sliding, so as to clamp the sheath by the connecting column and limit the rotation of the sheath.

[0014] Optionally, the telescopic locking mechanism also includes a pressure rod, which corresponds one-to-one to the locking rod and is located at one end of the locking rod away from the connecting column. One end of the pressure rod passes through the handle and is slidably connected to the handle in a direction perpendicular to the axis of the connecting column. During the sliding process, the pressure rod drives the locking rod to press against or move away from the connecting column.

[0015] In summary, the present application includes at least one of the following beneficial effects: 1. By inserting a position sensor into the magnetic pole reticular membrane of the sheath tube, the position sensor transmits the position information to the external display device through the sensing wire and the external interface of the sensing wire, so that when one end of the sheath tube is inserted into the human body, the position information of the end of the sheath tube can be reflected in real time through the position sensor. After reaching the designated position, the surgical instrument can be inserted into the sheath tube. In this process, the position information can be recorded without switching any instruments, which effectively reduces the steps of the surgical operation. When used with the developing ring on the outer wall of the sheath tube, the accuracy and safety of the operation can be further ensured; 2. By arranging a movable first traction wire in the sheath, when the surgical instrument is inserted into the sheath and extended from the opening of the magnetic pole ring block, the rotating paddle is pushed, and the rotating paddle drives the magnetic pole ring block to close the opening through the first traction wire, thereby clamping and fixing the surgical instrument, which can provide stable support for the surgical instrument; at the same time, when the operation is over, after the front end of the surgical instrument, such as a stone removal instrument, is completely retracted into the sheath, the magnetic switch can be pressed, and the battery supplies power to the magnetic pole ring block through the magnetic pole wire. After the magnetic pole ring block is energized, it generates magnetic force and actively closes its own opening, so that the entire magnetic pole mesh membrane forms a closed area, which can prevent stone debris from falling back into the human body and improve the safety of the operation; 3. A special curved step column that rotates together with the sheath is provided in the handle, and a special curved groove is opened on the surface of the special curved step column. When the guide straight rod is pushed to slide along the limiting groove, the end of the guide straight rod slides along the special curved groove at the same time, thereby driving the special curved step column to drive the sheath to rotate synchronously; at the same time, a guide ring is arranged and slidably connected to the outer surface of the special curved step column, and the guide straight rod is inserted into the side wall of the guide ring at the same time, so that the guide ring can be driven to move synchronously when the guide straight rod is moved, and the moving guide ring drives the sheath to bend through the second traction wire, thereby realizing the function of the sheath being able to bend while rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram showing the overall structure of the guide sheath in an embodiment of the present application; Figure 2 is a cross-sectional schematic diagram of the internal structure of the sheath and handle of an embodiment of the present application; Figure 3 yes Figure 2 An enlarged schematic diagram at A; Figure 4 yes Figure 2 An enlarged schematic diagram at B; Figure 5 is a schematic diagram showing the structure of a magnetic pole ring block in an embodiment of the present application; Figure 6 This is a schematic diagram showing the structure inside the handle of an embodiment of the present application; Figure 7 is a structural schematic diagram showing a rotary bending mechanism according to an embodiment of the present application; Figure 8 is an exploded schematic diagram showing a telescopic locking mechanism according to an embodiment of the present application; Fig. 9 It is a schematic diagram of the structure of the embodiment of the present application showing the telescopic locking mechanism before and after the action.

[0017] Description of reference numerals: 100, magnetic pole mesh; 101, magnetic pole ring block; 102, sensing wire; 103, position sensor; 104, film; 105, first traction wire; 106, magnetic pole wire; 200, developing ring; 300, sheath tube; 301, guide slide groove; 400, rotating paddle; 401, fixing column; 402, axial positioning locking member; 500, handle; 501, limit slot; 600, telescopic locking mechanism; 601, pressure rod; 602, locking rod; 603, locking piece; 604, compression spring; 605, connecting column; 606, positioning hole; 700, rotary bending mechanism; 701, special curved step column; 702, guide straight rod; 703, special curved groove; 704, positioning column; 705, guide ring; 706, second traction wire; 800, external interface of sensing wire; 901, magnetic switch; 902, relay; 903, battery. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1-9 This application is described in further detail.

[0019] The present application embodiment discloses a multifunctional ureteral guide sheath, referring to Figures 1 to 5 The multifunctional ureteral guide sheath includes a magnetic pole mesh 100, a developing ring 200, a sheath tube 300 and a handle 500. A rotating paddle 400 is also provided at the end of the handle 500. The handle 500 is also provided with a telescopic locking mechanism 600 and a rotating bending mechanism 700. The rotating bending structure is used to drive the sheath tube 300 to bend while rotating, and the rotating bending mechanism 700 is used to limit the rotation of the sheath tube 300.

[0020] The handle 500 is hollow inside and is a cylindrical shape with both ends being constricted. The length of the sheath tube 300 is greater than that of the handle 500. The sheath tube 300 is coaxially arranged in the handle 500, and both ends extend out of the handle 500. The sheath tube 300 can rotate along the axis of the handle 500. After determining the length of one end extending out of the handle 500, the sheath tube 300 does not move relative to the axis direction of the handle 500. The sheath tube 300 is made of a deformable elastic material, such as rubber or memory alloy material, so that the sheath tube 300 can be bent to any side. The internal space of the sheath tube 300 can be penetrated by surgical instruments such as stone removal instruments and extend from the end of the sheath tube 300. The developing ring 200 is coaxially sleeved outside the sheath tube 300 and fixed to a fixed position of the sheath tube 300 by glue. The developing ring 200 can be arranged with multiple intervals along the length direction of the sheath tube 300, and the specific number of developing rings 200 can be increased or decreased according to the actual length of the sheath tube 300.

[0021] The magnetic pole mesh 100 is located at the end of the sheath tube 300 away from the handle 500. The magnetic pole mesh 100 includes a magnetic pole ring block 101, a sensing wire 102, a position sensor 103 and a film 104, wherein the film 104 can be made of a material that can be stretched, folded and deformed, such as a TPU sandwich film 104 or a PVC sandwich film 104, so that the film 104 can be stretched and folded as needed. The film 104 is coated on the end of the sheath tube 300 to form a spherical surrounding structure, the sensing wire 102 is inserted into the sheath tube 300, and one end of the sensing wire 102 extends into the cavity formed by the film 104, and the other end of the sensing wire 102 extends in the opposite direction from the other end of the sheath tube 300, and is connected to a sensing wire external interface 800, which is used to connect an external display device to transmit the electrical signal received by the sensing wire 102 to the external display device.

[0022] There are multiple position sensors 103, which are spaced apart inside the cavity formed by the film 104, and all position sensors 103 are electrically connected to the sensing wire 102. Specifically, the position sensor 103 can be attached to the spherical mesh intersection of the film 104, so that the position sensor 103 can perform all-round detection of the end of the sheath 300, so that the positioning can be more accurate. The magnetic pole ring block 101 is arranged at the end of the spherical structure formed by the film 104, and the magnetic pole ring block 101 is provided with an opening coaxial with the sheath 300. The cavity formed by the inner part of the film 104 connects the opening of the magnetic pole ring block 101 with the internal space of the sheath 300, so that the surgical instrument can pass through the sheath 300, the cavity formed by the film 104, and the opening of the magnetic pole ring block 101, and finally extend out of the sheath 300.

[0023] The position sensor 103 transmits the position information to the external display device through the sensor wire 102 and the sensor wire external interface 800, so that when one end of the sheath tube 300 is inserted into the human body, the position information of the end of the sheath tube 300 can be reflected in real time through the position sensor 103. After reaching the specified position, the surgical instrument can be inserted into the sheath tube 300. During this process, the position information can be recorded without switching any instruments, which effectively reduces the steps of the surgical operation. When used with the developing ring 200 on the outer wall of the sheath tube 300, the accuracy and safety of the operation can be further ensured.

[0024] In order to close the opening of the magnetic pole ring block 101, the rotating paddle 400 is sleeved outside the sheath tube 300 and can slide along the length direction of the sheath tube 300. A guide slot 301 is provided on the outer wall of the sheath tube 300 at a position corresponding to the rotating paddle 400. The guide slot 301 is provided along the length direction of the sheath tube 300. A fixed column 401 is fixed inside the rotating paddle 400, and an axial positioning locking piece 402 is provided inside the guide slot 301. The axial positioning locking piece 402 and the guide slot 301 are interference fit. The rotating paddle 400 is covered outside the axial positioning locking piece 402. The axial positioning locking piece 402 can lock the rotating paddle 400 in the axial direction, which can prevent the rotating paddle 400 from falling out of the sheath tube 300, and the rotating paddle 400 and the sheath tube 300 are clearance fit.

[0025] Two first traction wires 105 are movably arranged in the sheath tube 300. The first traction wires 105 can move in the sheath tube 300. The two traction wires are symmetrically distributed relative to the axis of the sheath tube 300. One end of the first traction wire 105 is fixedly connected to the fixed column 401 in the rotating paddle 400, and the other end is fixedly connected to the magnetic pole ring block 101. When the rotating paddle 400 is pushed, the magnetic pole ring block 101 can be driven to close the opening formed by itself through the first traction wire 105. When the surgical instrument is inserted into the sheath tube 300 and extends from the opening of the magnetic pole ring block 101, the rotating paddle 400 is pushed, and the rotating paddle 400 drives the magnetic pole ring block 101 to close the opening through the first traction wire 105, thereby clamping and fixing the surgical instrument, and providing stable support for the surgical instrument.

[0026] Furthermore, a spirally wound magnetic pole wire 106 is provided in the sheath tube 300, and a battery 903 and a relay 902 are provided in the handle 500. The battery 903 is electrically connected to the relay 902 and can supply power to the relay 902. One end of the magnetic pole wire 106 is electrically connected to the relay 902, and the other end is electrically connected to the magnetic pole ring block 101, so that the battery 903 can supply power to the magnetic pole ring block 101. A pushable magnetic switch 901 is provided on the side wall of the handle 500. The magnetic switch 901 is electrically connected to the relay 902, and when the magnetic switch 901 is pressed, the magnetic pole ring block 101 can be supplied with power through the relay 902. When the operation is over, after the front end of the surgical instrument, such as the stone removal instrument, is completely retracted into the sheath tube 300, the magnetic switch 901 can be pressed, and the battery 903 supplies power to the magnetic pole ring block 101 through the magnetic pole wire 106. After the magnetic pole ring block 101 is powered on, it generates magnetic force and actively closes its own opening, so that the entire magnetic pole mesh 100 forms a closed area, which can prevent the broken stones from falling back into the human body and improve the safety of the operation. When the doctor finishes the operation, he removes the guide sheath and turns off the magnetic switch 901.

[0027] Furthermore, the sheath tube 300 is provided with three layers from the inside to the outside, and the three-layer structure can be made of rubber or memory alloy material. The sensing wire 102 and the magnetic pole wire 106 are both wrapped outside the bottom layer material of the sheath tube 300, that is, located between the bottom layer material and the middle layer material; and the first traction wire 105 is wrapped outside the middle layer material, that is, located between the middle layer material and the outermost layer material; the developing ring 200 is sleeved outside the outermost layer material of the sheath tube 300. The layer structure constituting the sheath tube 300 can provide good protection for the wires.

[0028] Further, see Figure 6 and Figure 7In order to enable the sheath tube 300 to bend to one side while rotating, the rotation bending mechanism 600 includes a special curved step column 701 and a guide straight rod 702, wherein the special curved step column 701 is rotatably connected to the handle 500, and the rotation axis is consistent with the axis of the handle 500. The special curved step column 701 is sleeved and fixed outside the sheath tube 300, so that the special curved step column 701 and the sheath tube 300 can rotate synchronously. A positioning column 704 is coaxially arranged at one end of the special curved step column 701 close to the rotating paddle 400, and the special curved step column 701 is inserted and rotatably connected to the positioning column 704. The positioning column 704 is fixed in the handle 500, which can provide a positioning function for the installation of the special curved step column 701.

[0029] A special curved groove 703 is provided on the outer wall of the special curved step column 701. In the embodiment of the present application, the special curved groove 703 can be a sliding groove that is arranged in an S shape and connected end to end. One end of the guide straight rod 702 is inserted into the handle 500 along the axis direction perpendicular to the special curved step column 701, and is slidably connected to the special curved groove 703. An operating ring is fixed to the other end of the guide straight rod 702. A limited slot 501 is provided on the outer wall of the handle 500 along its length direction. The rod body of the guide straight rod 702 is slidably connected to the limited slot 501, so that the guide straight rod 702 can slide linearly along the limited slot 501.

[0030] Furthermore, a guide ring 705 is disposed on the outer surface of the special curved step column 701 and is slidably connected. One end of the guide straight rod 702 located inside the handle 500 passes through the side wall of the guide ring 705, so that the guide straight rod 702 can drive the guide ring 705 to move synchronously while sliding. A second traction wire 706 is movably disposed inside the sheath tube 300. The second traction wire 706 is also located between the bottom layer material and the middle layer material. One end of the second traction wire 706 is fixed to the end surface of the guide ring 705 close to the magnetic pole mesh 100, and the other end of the second traction wire 706 is fixed to the end of the sheath tube 300 away from the handle 500.

[0031] When the guide rod 702 is in the middle of the special curved step column 701, the front end of the sheath tube 300 is in a straight state; when the guide rod 702 is pushed forward along the limit slot 501, the side wall of the guide rod 702 abuts against the slot wall of the special curved slot 703, so that the special curved step column 701 rotates clockwise, thereby driving the sheath tube 300 to rotate clockwise, and at the same time, the guide ring 705 drives the front end of the sheath tube 300 to bend downward through the second traction wire 706. Similarly, when the guide rod 702 is pulled backward, the sheath tube 300 rotates counterclockwise, and at the same time, the front end of the sheath tube 300 bends upward, so that the sheath tube 300 can bend while rotating, which is convenient for doctors to perform surgical operations.

[0032] Further, see Figures 6 to 9In order to prevent the sheath tube 300 from rotating and bending when it needs to be fixed, the telescopic locking mechanism 600 includes two groups of pressure rods 601 and locking rods 602. The pressure rods 601 correspond to the locking rods 602 one by one, and the two groups of locking rods 602 are symmetrically distributed on both sides of the radial direction of the connecting column 605 along the axis of the connecting column 605. One end of the pressure rod 601 passes through the outside of the handle 500 and is slidably connected to the handle 500 in a direction perpendicular to the axis of the connecting column 605. An operating ring is also fixed to the end of the pressure rod 601 located outside the handle 500. The locking rod 602 is slidably connected to the inside of the handle 500 in a direction perpendicular to the axis of the connecting column 605. There is an annular column in the middle of the pressure rod 601, which clamps the inner shell of the handle 500, thereby limiting the upward movement of the pressure rod 601 and preventing the pressure rod 601 from escaping from the handle 500.

[0033] A locking piece 603 is arranged between the pressure rod 601 and the locking rod 602. The end of the locking piece 603 away from the pressure rod 601 is provided with tooth grooves of different depths to realize the extension or retraction of the locking rod 602. A guide groove is provided inside the locking piece 603. At the same time, a protrusion is fixed to the outer wall of the pressure rod 601. The protrusion slides in the guide groove accordingly to prevent the pressure rod 601 from rotating circumferentially.

[0034] A protruding pressure ring is fixed in the middle of the locking rod 602, and four racks are spaced apart on the outer wall of the locking rod 602 near the locking member 603, and the racks can be correspondingly inserted into the tooth grooves of the locking member 603 for the cooperation between the locking member 603 and the pressure rod 601. A compression spring 604 is provided on the outer sleeve of the end of the locking rod 602 away from the locking member 603, and a connecting column 605 is provided on the end of the special curved step column 701 away from the magnetic pole mesh 100, and the connecting column 605 can be made of soft materials such as rubber, so that the connecting column 605 can be deformed by external force. One end of the special curved step column 701 is inserted and rotatably connected to the connecting column 605. The connecting column 605 is fixed relative to the handle 500. The connecting column 605 corresponds to the position of the locking rod 602, and the outer wall of the connecting column 605 is provided with a positioning hole 606 corresponding to the locking rod 602. The locking rod 602 can be inserted into the positioning hole 606 accordingly, so that the two sets of locking rods 602 can be pressed against the outer wall of the connecting column 605 from both sides at the same time.

[0035] When the sheath tube 300 needs to be locked, the pressure rod 601 can be pressed down, and the pressure rod 601 drives the locking rod 602 to slide toward the connecting column 605 through the locking member 603 until the locking rod 602 is inserted into the positioning hole 606 and pressed against the connecting column 605. At this time, the connecting column 605 is deformed and pressed against the outer wall of the sheath tube 300. The friction between the connecting column 605 and the sheath tube 300 limits the rotation of the sheath tube 300, and the compression spring 604 is compressed to generate a restoring force. During the upward process of the pressure rod 601 after being pressed down, the guide rail pressure rod 601 is driven by the restoring force generated by the terminal compression spring 604 to push the rack of the locking rod 602 to rotate along the tooth groove inclined surface of the locking member 603, and then the locking rod 602 falls into the adjacent tooth groove of the locking member 603, realizing the extension and locking of the locking rod 602, so that the locking rod 602 remains in a state of pressing against the connecting column 605. The pressure rod 601 is pressed down again, and then during the upward process, the rack of the locking rod 602 rotates along the tooth groove inclined surface of the locking member 603 again, and then the locking rod 602 falls into the adjacent tooth groove of the locking member 603, thereby retracting the locking rod 602. At this time, the locking rod 602 is disengaged from the connecting column 605, and the sheath tube 300 is unlocked.

[0036] The implementation principle of a multifunctional ureteral guide sheath of the present application embodiment is as follows: a position sensor 103 is placed inside the magnetic pole retina 100 of the sheath tube 300, and the position sensor 103 transmits the position information to an external display device through the sensing wire 102 and the sensing wire external interface 800, so that when one end of the sheath tube 300 is inserted into the human body, the position information of the end of the sheath tube 300 can be reflected in real time through the position sensor 103, effectively reducing the steps of the surgical operation, and used in conjunction with the developing ring 200 on the outer wall of the sheath tube 300, the accuracy and safety of the operation are further ensured; and a movable first traction device is provided inside the sheath tube 300 Wire 105, when the surgical instrument is inserted into the sheath 300 and extended from the opening of the magnetic pole ring block 101, the rotating paddle 400 is pushed, and the rotating paddle 400 drives the magnetic pole ring block 101 to close the opening through the first traction wire 105, thereby clamping and fixing the surgical instrument, and providing stable support for the surgical instrument; when the operation is over, the magnetic switch 901 can be pressed, and the battery 903 supplies power to the magnetic pole ring block 101 through the magnetic pole wire 106. After the magnetic pole ring block 101 is energized, it generates magnetic force and actively closes its own opening, so that the entire magnetic pole mesh membrane 100 forms a closed area, which can prevent debris from falling back into the human body and improve the safety of the operation.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multifunctional ureteral guide sheath, characterized in that: include A handle, wherein the handle is hollow inside; A sheath tube, wherein the sheath tube is coaxially inserted into the handle and both ends extend out of the handle, the sheath tube is fixed relative to the handle, the internal space of the sheath tube is used for surgical instruments to pass through, and the outer sheath tube is provided with a plurality of developing rings; A magnetic pole mesh film is located at one end of the sheath tube and is used to wrap the end of the sheath tube; The magnetic pole mesh film includes a magnetic pole ring block, a sensing wire, a position sensor, and a film. The film is coated on the end of the sheath tube to form a spherical surrounding structure. The magnetic pole ring block is arranged at the end of the spherical surrounding structure formed by the film. The magnetic pole ring block is provided with an opening coaxial with the sheath tube. The cavity formed inside the film connects the opening of the magnetic pole ring block with the internal space of the sheath tube. There are multiple position sensors, which are distributed at intervals inside the cavity formed by the film. The position sensor is used to record and feedback the position information of the front end of the guide sheath in real time. One end of the sensing wire is electrically connected to each position sensor, and the other end of the sensing wire passes through the sheath tube and is provided with a sensing wire external interface for an external display device.

2. The multifunctional ureteral guide sheath according to claim 1, characterized in that: A rotating paddle is provided at one end of the handle close to the magnetic pole mesh. The rotating paddle is sleeved outside the sheath and can slide along the length direction of the sheath. Two first traction wires are movably arranged in the sheath. The two first traction wires are symmetrically distributed relative to the axis of the sheath. One end of the first traction wire is fixed to the rotating paddle, and the other end is fixed to the magnetic pole ring block. The rotating paddle drives the magnetic pole ring block to close the opening formed by itself through the first traction wire.

3. The multifunctional ureteral guide sheath according to claim 2, characterized in that: A magnetic pole wire is arranged in the sheath tube, a battery and a relay are arranged in the handle, the battery is electrically connected to the relay, one end of the magnetic pole wire is electrically connected to the relay, and the other end is electrically connected to the magnetic pole ring block, a magnetic switch is arranged on the handle, and the magnetic switch is electrically connected to the relay, and the magnetic pole ring block can be attracted to close the opening formed by itself after power is supplied.

4. The multifunctional ureteral guide sheath according to claim 3, characterized in that: The sheath has three layers from inside to outside, and all are made of deformable elastic materials. The sensing wire and the magnetic pole wire are wrapped outside the bottom layer material of the sheath, the first traction wire is wrapped outside the middle layer material, and the developing ring is set outside the outermost layer material of the sheath.

5. The multifunctional ureteral guide sheath according to claim 1, characterized in that: The handle is provided with a rotational bending mechanism and a telescopic locking mechanism. The rotational bending mechanism is used to drive the sheath tube to bend to one side while rotating, and the telescopic locking mechanism is used to lock the rotational bending mechanism to limit the rotation and bending of the sheath tube.

6. The multifunctional ureteral guide sheath according to claim 5, characterized in that: The rotary bending mechanism includes a special curved step column and a guide straight rod. The special curved step column is sleeved and fixed outside the sheath tube and is rotatably connected to the handle. A special curved groove is provided on the outer wall of the special curved step column. One end of the guide straight rod is inserted into the handle along an axial direction perpendicular to the special curved step column and is slidably connected to the special curved groove. A limited through groove is provided on the outer wall of the handle along its own length direction. The rod body of the guide straight rod is slidably connected to the limited through groove. The guide straight rod can drive the special curved step column to rotate during the sliding process along the limited through groove.

7. The multifunctional ureteral guide sheath according to claim 6, characterized in that: A guide ring is arranged on the outer surface of the special curved step column and is slidably connected thereto. One end of the guide straight rod located inside the handle passes through the side wall of the guide ring. A second traction wire is movably arranged inside the sheath. One end of the second traction wire is fixed to the end surface of the guide ring close to the magnetic pole mesh, and the other end of the second traction wire is fixed to the end of the sheath away from the handle.

8. The multifunctional ureteral guide sheath according to claim 6, characterized in that: The end of the special curved step column away from the magnetic pole mesh is sleeved with a connecting column, and the connecting column is made of soft material. One end of the special curved step column is rotatably connected to the connecting column, and the position of the connecting column relative to the handle is fixed. The telescopic locking mechanism includes two groups of locking rods, and the two groups of locking rods are symmetrically distributed on both radial sides of the connecting column along the axis of the connecting column. The locking rods are slidably connected to the inside of the handle along a direction perpendicular to the axis of the connecting column. When sliding, the two groups of locking rods can simultaneously press against the outer wall of the connecting column from both sides to clamp the sheath by the connecting column to limit the rotation of the sheath.

9. The multifunctional ureteral guide sheath according to claim 8, characterized in that: The telescopic locking mechanism also includes a pressure rod, which corresponds to the locking rod one by one and is located at the end of the locking rod away from the connecting column. One end of the pressure rod passes through the handle and is slidably connected to the handle in a direction perpendicular to the axis of the connecting column. During the sliding process, the pressure rod drives the locking rod to press against or move away from the connecting column.

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