Multifunctional ureteral guide sheath

Abstract

The application discloses a multifunctional ureter guide sheath, and relates to the technical field of urinary surgery instruments, which comprises a handle, a sheath tube and a magnetic pole net film, the sheath tube is coaxially arranged in the handle, the magnetic pole net film is arranged at one end of the sheath tube and used for wrapping the end of the sheath tube, the magnetic pole net film comprises a magnetic pole ring block, a sensing wire, a position sensor and a film, the film is wrapped 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, a cavity formed in the film is communicated with the opening of the magnetic pole ring block and the inner space of the sheath tube, and a plurality of position sensors are arranged and distributed at intervals in the cavity formed by the film, and the position sensors are used for recording and feeding back the position information of the front end of the guide sheath in real time. The application has the effect of improving the positioning efficiency of the guide sheath.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of urological surgical instruments, in particular to a multifunctional ureter guide sheath. BACKGROUND

[0002] The ureter guide sheath is a kind of medical instrument commonly used in urological surgery, especially in percutaneous nephrolithotomy or ureteroscopy, which mainly provides a channel for doctors to insert other tools (such as nephroscopes, ureteroscopes, laser fibers, etc.) for treatment or diagnosis of patients, especially when the ureter and kidney area needs to be operated.

[0003] Under general anesthesia or local anesthesia, the doctor inserts the ureter guide sheath into the ureter through the urethra or bladder, and the guide sheath enters the kidney or ureter lesion area through the ureter, providing a stable channel for the doctor to easily enter the target area without damaging the urinary tract wall. The space in the guide sheath is sufficient to accommodate endoscopes or other treatment devices, and the doctor can observe the lesion and perform treatment through these devices, and different medical instruments can be inserted multiple times for treatment, avoiding the trauma caused by repeated catheter insertion.

[0004] The conventional ureter guide sheath needs to be positioned with the help of external instruments, and after positioning, the instruments need to be switched to complete the subsequent surgical operation. The whole process of positioning and replacing instruments makes the surgical operation process more complicated and increases the operation time, which brings an uncomfortable surgical experience to the patient. SUMMARY

[0005] In order to improve the situation that the conventional ureter guide sheath needs to be positioned with the help of external instruments, resulting in a more complicated surgical operation process and increasing the operation time, the application provides a multifunctional ureter guide sheath.

[0006] The application provides a multifunctional ureter guide sheath, which adopts the following technical scheme:

[0007] A multifunctional ureter guide sheath comprises

[0008] A handle, which is hollow inside;

[0009] A sheath tube, which is coaxially arranged in the handle and has both ends extending out of the handle, the sheath tube is fixed relative to the handle, the internal space of the sheath tube is used for arranging surgical instruments, and the sheath tube is provided with a plurality of developing rings;

[0010] A magnetic pole net film, which is located at one end of the sheath tube and is used for wrapping the end of the sheath tube;

[0011] The magnetic pole net film comprises a magnetic pole ring block, a sensing wire, a position sensor, and a film, the film is wrapped on the end of the sheath 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, a cavity formed in the film is communicated with the opening of the magnetic pole ring block and the internal space of the sheath, the position sensor is arranged in plurality and is distributed at intervals in the cavity formed by the film, the position sensor is used for recording and feeding back the position information of the front end of the guide sheath in real time, one end of the sensing wire is electrically connected with each position sensor, the other end of the sensing wire is arranged to pass out of the sheath and is provided with a sensing wire external interface of an external display device.

[0012] Optionally, the handle is provided with a rotating knob near one end of the magnetic pole net film, the rotating knob 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 with the rotating knob, and the other end is fixed with the magnetic pole ring block, the rotating knob drives the magnetic pole ring block to close the opening formed by the magnetic pole ring block through the first traction wire.

[0013] Optionally, the sheath is provided with a magnetic pole wire, the handle is provided with a battery and a relay, the battery is electrically connected with the relay, one end of the magnetic pole wire is electrically connected with the relay, and the other end is electrically connected with the magnetic pole ring block, the handle is provided with a magnetic force switch, the magnetic force switch is electrically connected with the relay, and the magnetic pole ring block can attract and close the opening formed by the magnetic pole ring block after being electrified.

[0014] Optionally, the sheath is provided with three layers from inside to outside, and is made of elastic material capable of deformation, 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 sleeved outside the outermost layer material of the sheath.

[0015] Optionally, the handle is provided with a rotating bending mechanism and a telescopic locking mechanism, the rotating bending mechanism is used for driving the sheath to bend to one side while rotating, and the telescopic locking mechanism is used for locking the rotating bending mechanism to limit the rotation and bending of the sheath.

[0016] Optionally, the rotating bending mechanism comprises a special curve stepped column and a guide straight rod, the special curve stepped column is sleeved and fixed outside the sheath and is rotationally connected to the handle, a special curve groove is formed in the outer wall of the special curve stepped column, one end of the guide straight rod is arranged to pass into the handle along the axis direction perpendicular to the special curve stepped column and is slidingly connected in the special curve groove, a limiting through slot is formed in the outer wall of the handle along the length direction of the handle, the rod body of the guide straight rod is slidingly connected in the limiting through slot, and the guide straight rod can drive the special curve stepped column to rotate during the sliding process in the limiting through slot.

[0017] Optionally, the special curve step column is sleeved with a guide ring and is connected with the guide ring in a sliding manner, one end of the guide straight rod inside the handle penetrates through the side wall of the guide ring, the second traction wire is movably arranged inside the sheath tube, one end of the second traction wire is fixed to the end face of the guide ring close to the magnetic pole retinal side, and the other end of the second traction wire is fixed to the end of the sheath tube away from the handle.

[0018] Optionally, the special curve step column is sleeved with a connecting column away from the magnetic pole retinal end, the connecting column is made of soft material, one end of the special curve step column is rotationally connected in the connecting column, the connecting column is fixed relative to the handle, the telescopic locking mechanism includes two groups of locking rods, the two groups of locking rods are symmetrically distributed on the radial two sides of the connecting column along the axis of the connecting column, the locking rods are slidingly connected inside the handle along the direction perpendicular to the axis of the connecting column, and the two groups of locking rods can simultaneously abut against the outer wall of the connecting column when sliding to clamp the sheath tube through the connecting column and limit the rotation of the sheath tube.

[0019] Optionally, the telescopic locking mechanism further includes a pressing rod corresponding to the locking rod and located at the end of the locking rod away from the connecting column, one end of the pressing rod penetrates out of the handle, and the pressing rod is slidingly connected to the handle along the direction perpendicular to the axis of the connecting column, and the pressing rod drives the locking rod to abut against or move away from the connecting column during the sliding process.

[0020] In summary, the present application includes at least one of the following beneficial effects:

[0021] 1. By embedding a position sensor in the magnetic pole retinal of the sheath tube, the position sensor transmits position information to the external display device through the sensing wire and the sensing wire external interface, so that when the 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, and after reaching the specified position, the surgical instrument can be inserted into the sheath tube, and in this process, the position information can be recorded without switching any instrument, effectively reducing the steps of surgical operation, and the use of the developing ring on the outer wall of the sheath tube further ensures the accuracy and safety of the operation;

[0022] 2. By arranging the movable first traction wire in the sheath tube, when the surgical instrument is inserted into the sheath tube and extends out of the opening of the magnetic pole ring block, the rotating knob is pushed, the rotating knob drives the magnetic pole ring block to close the opening through the first traction wire, so as to clamp and fix the surgical instrument, which can provide stable support for the surgical instrument; at the same time, when the operation is completed, the front end of the surgical instrument such as a stone removing instrument is completely retracted into the sheath tube, the magnetic switch is pressed, the battery supplies power to the magnetic pole ring block through the magnetic pole wire, the magnetic pole ring block generates magnetic force after being powered on and actively closes the opening itself, so that the entire magnetic pole retinal forms a closed area, which can prevent the stone debris from falling back into the human body, and improve the safety of the operation;

[0023] 3. By setting a special curve ladder column rotating with the sheath in the handle, and opening a special curve groove on the surface of the special curve ladder column, when the guide straight rod is pushed to slide along the limiting through groove, the end of the guide straight rod slides along the special curve groove at the same time, so as to drive the special curve ladder column to rotate the sheath synchronously; at the same time, the guide ring is sleeved and slidably connected outside the special curve ladder column, the guide straight rod is inserted in 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 moves, and the moving guide ring drives the sheath to bend through the second traction wire, so as to realize the function that the sheath can bend while rotating. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure schematic diagram of the guide sheath as a whole according to the embodiment of the present application.

[0025] Figure 2 It is a sectional view schematic diagram of the internal structure of the sheath and the handle according to the embodiment of the present application.

[0026] Figure 3 It is Figure 2 It is an enlarged schematic diagram at A.

[0027] Figure 4 It is Figure 2 It is an enlarged schematic diagram at B.

[0028] Figure 5 It is a structure schematic diagram of the magnetic pole ring block according to the embodiment of the present application.

[0029] Figure 6 It is a structure schematic diagram of the internal structure of the handle according to the embodiment of the present application.

[0030] Figure 7 It is a structure schematic diagram of the rotating and bending mechanism according to the embodiment of the present application.

[0031] Figure 8 It is an exploded schematic diagram of the telescopic locking mechanism according to the embodiment of the present application.

[0032] Figure 9 It is a structure schematic diagram of the telescopic locking mechanism before and after action according to the embodiment of the present application.

[0033] Explanation of reference signs: 100, magnetic pole net film; 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 chute; 400, rotary knob; 401, fixed column; 402, axial positioning locking piece; 500, handle; 501, limiting through slot; 600, telescopic locking mechanism; 601, pressing rod; 602, locking rod; 603, locking piece; 604, compression spring; 605, connecting column; 606, positioning hole; 700, rotary bending mechanism; 701, special curve stepped column; 702, guide straight rod; 703, special curve groove; 704, positioning column; 705, guide ring; 706, second traction wire; 800, sensing wire external interface; 901, magnetic switch device; 902, relay; 903, battery. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying drawings. Figures 1-9 The present application is further described in detail.

[0035] The present application discloses a multifunctional ureter guide sheath, referring to Figures 1 to 5 The multifunctional ureter guide sheath comprises a magnetic pole net film 100, a developing ring 200, a sheath tube 300 and a handle 500. The end of the handle 500 is further provided with a rotary knob 400. The handle 500 is further provided with a telescopic locking mechanism 600 and a rotary bending mechanism 700. The rotary bending mechanism is used to drive the sheath tube 300 to bend while rotating, and the rotary bending mechanism 700 is used to limit the rotation of the sheath tube 300.

[0036] The handle 500 is hollow inside and is in the shape of a cylinder 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 extends out of the handle 500 at both ends. The sheath tube 300 can rotate along the axis of the handle 500 and does not displace relative to the axis of the handle 500 after the length extending out of one end of the handle 500 is determined. The sheath tube 300 is made of an elastic material capable of deforming, such as rubber or memory alloy material, so that the sheath tube 300 can bend to any side. The internal space of the sheath tube 300 can be penetrated by surgical instruments such as a lithotripsy instrument and the like, and the surgical instruments extend out of the end of the sheath tube 300. The developing ring 200 is coaxially arranged outside the sheath tube 300 and is fixed at a fixed position of the sheath tube 300 by glue. The developing ring 200 can be arranged at multiple positions along the length direction of the sheath tube 300. The number of the developing rings 200 arranged can be increased or decreased according to the actual length of the sheath tube 300.

[0037] The magnetic pole net film 100 is located at the end of the sheath tube 300 away from the handle 500, and comprises a magnetic pole ring block 101, a sensing wire 102, a position sensor 103 and a film 104. The film 104 can be made of TPU sandwich film 104 or PVC sandwich film 104, and can be stretched and folded as needed. The film 104 is wrapped around the end of the sheath tube 300 to form a spherical surrounding structure. The sensing wire 102 is arranged in the sheath tube 300, 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 out of the other end of the sheath tube 300 and is connected with a sensing wire external interface 800. The sensing wire external interface 800 is used for external display device, and the electrical signal received by the sensing wire 102 is transmitted to the external display device.

[0038] The position sensor 103 is provided in plurality and is distributed at intervals in the cavity formed by the film 104. All the position sensors 103 are electrically connected with the sensing wire 102. Specifically, the position sensor 103 can be attached to the spherical net-shaped intersection position of the film 104, so that the position sensor 103 can detect the end of the sheath tube 300 in all directions, 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 tube 300. The cavity formed in the film 104 is in communication with the opening of the magnetic pole ring block 101 and the internal space of the sheath tube 300, so that the surgical instrument can pass through the cavity formed by the sheath tube 300 and the film 104, the opening of the magnetic pole ring block 101, and finally extend out of the sheath tube 300.

[0039] The position sensor 103 transmits the position information to the external display device through the sensing wire 102 and the sensing wire external interface 800, so that when the 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, and the surgical instrument can be inserted into the sheath tube 300 after reaching the specified position. In this process, the position information can be recorded without switching any instrument, effectively reducing the steps of surgical operation. In combination with the developing ring 200 on the outer wall of the sheath tube 300, the accuracy and safety of the operation are further ensured.

[0040] In order to enable the opening of the magnetic pole ring block 101 to be closed, the rotating knob 400 is sleeved outside the sheath tube 300 and can slide along the length direction of the sheath tube 300, the outer wall of the sheath tube 300 is provided with a guide sliding groove 301 corresponding to the position of the rotating knob 400, and the guide sliding groove 301 is provided along the length direction of the sheath tube 300. The rotating knob 400 is fixedly provided with a fixed column 401 inside, the guide sliding groove 301 is provided with an axial positioning locking member 402, the axial positioning locking member 402 is in interference fit with the guide sliding groove 301, the rotating knob 400 is covered outside the axial positioning locking member 402, the axial positioning locking member 402 can lock the axial direction of the rotating knob 400, and the rotating knob 400 can be prevented from being pulled out of the sheath tube 300, and the rotating knob 400 is in clearance fit with the sheath tube 300.

[0041] 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 with the fixed column 401 in the rotating knob 400, and the other end is fixedly connected with the magnetic pole ring block 101. When the rotating knob 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, after the surgical instrument is inserted into the sheath tube 300 and extends out from the opening of the magnetic pole ring block 101, the rotating knob 400 is pushed, the rotating knob 400 drives the magnetic pole ring block 101 to close the opening through the first traction wire 105, so that the surgical instrument is clamped and fixed, and stable support can be provided for the surgical instrument.

[0042] Further, the sheath tube 300 is provided with a spiral magnetic pole wire 106, the handle 500 is provided with a battery 903 and a relay 902, the battery 903 is electrically connected with the relay 902, the battery 903 can supply power to the relay 902, one end of the magnetic pole wire 106 is electrically connected with the relay 902, and the other end is electrically connected with the magnetic pole ring block 101, so that the battery 903 can supply power to the magnetic pole ring block 101. The handle 500 is provided with a magnetic switch 901 which can be pressed, the magnetic switch 901 is electrically connected with the relay 902, and the magnetic switch 901 can supply power to the magnetic pole ring block 101 through the relay 902 when the magnetic switch 901 is pressed. When the operation is completed, the front end of the surgical instrument such as a stone removing instrument is completely retracted into the sheath tube 300, the magnetic switch 901 can be pressed, the battery 903 supplies power to the magnetic pole ring block 101 through the magnetic pole wire 106, the magnetic pole ring block 101 generates magnetic force after being powered on and actively closes the opening, so that the whole magnetic pole mesh 100 forms a closed area, the safety of the operation can be improved, and the falling of the stone debris into the human body can be prevented. When the doctor removes the guide sheath after the operation is completed, the magnetic switch 901 is turned off.

[0043] Further, the sheath tube 300 is provided with three layers from inside to outside, and the three layers can be made of rubber or memory alloy material. The sensing wire 102 and the magnetic pole wire 106 are wrapped outside the bottom layer material of the sheath tube 300, i.e., between the bottom layer material and the middle layer material; the first traction wire 105 is wrapped outside the middle layer material, i.e., between the middle layer material and the outermost layer material; and the developing ring 200 is sleeved outside the outermost layer material of the sheath tube 300. The layer structure of the sheath tube 300 can provide good protection for the wires.

[0044] Further, referring to Figure 6 and Figure 7 To realize the bending of the sheath tube 300 to one side while rotating, the rotating and bending mechanism 600 includes a special curve stepped column 701 and a guide straight rod 702. The special curve stepped column 701 is rotationally connected in the handle 500, and the rotation axis is consistent with the axis of the handle 500. The special curve stepped column 701 is sleeved and fixed outside the sheath tube 300, so that the special curve stepped column 701 and the sheath tube 300 can rotate synchronously. The special curve stepped column 701 is coaxially provided with a positioning column 704 near one end of the rotating knob 400, the special curve stepped column 701 is inserted and rotationally connected in the positioning column 704, and the positioning column 704 is fixed in the handle 500, thereby providing a positioning function for the installation of the special curve stepped column 701.

[0045] A special curve groove 703 is formed in the outer wall of the special curve stepped column 701. In the embodiment of the present application, the special curve groove 703 can be a sliding groove with an S-shaped winding and a connection between the first end and the second end. One end of the guide straight rod 702 is inserted into the handle 500 along the axis direction perpendicular to the special curve stepped column 701 and is slidingly connected in the special curve groove 703, and the other end of the guide straight rod 702 is fixed with an operation ring. A limiting through groove 501 is formed in the outer wall of the handle 500 along the length direction of the handle 500, and the rod body of the guide straight rod 702 is slidingly connected in the limiting through groove 501, so that the guide straight rod 702 can slide linearly along the limiting through groove 501.

[0046] Further, the special curve stepped column 701 is sleeved and slidingly connected with a guide ring 705, and one end of the guide straight rod 702 is inserted 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 arranged in the sheath tube 300, and 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 face of the guide ring 705 near the magnetic pole film 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.

[0047] When the guide straight rod 702 is in the middle of the special curve stepped column 701, the front end of the sheath tube 300 is in a straight state; when the guide straight rod 702 is pushed forward along the limiting through groove 501, the side wall of the guide straight rod 702 abuts against the groove wall of the special curve groove 703, so that the special curve stepped column 701 rotates clockwise, thereby driving the sheath tube 300 to also 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 straight 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 as to realize that the sheath tube 300 can bend while rotating, thereby facilitating the operation of the doctor.

[0048] Further, with reference to Figures 6 to 9 In order to make the sheath tube 300 not rotate and bend in a fixed position, the telescopic locking mechanism 600 includes two groups of pressing rods 601 and locking rods 602, the pressing rods 601 correspond to the locking rods 602 one by one, and the two groups of locking rods 602 are symmetrically distributed on the two sides of the connecting column 605 along the axis of the connecting column 605. One end of the pressing rod 601 penetrates out of the handle 500 and is slidingly connected to the handle 500 in a direction perpendicular to the axis of the connecting column 605, and the end of the pressing rod 601 located outside the handle 500 is also fixed with an operating ring. The locking rod 602 is slidingly connected to the inside of the handle 500 in a direction perpendicular to the axis of the connecting column 605, and the middle of the pressing rod 601 is fixed with a ring column, which clamps the inner shell of the handle 500, thereby limiting the upward movement of the pressing rod 601 and preventing the pressing rod 601 from coming out of the handle 500.

[0049] A locking piece 603 is arranged between the pressing rod 601 and the locking rod 602, one end of the locking piece 603 away from the pressing rod 601 is provided with tooth grooves with different depths, so as to realize the extension or retraction of the locking rod 602, and a guide groove is opened in the inside of the locking piece 603, and a protrusion is fixed on the outer wall of the pressing rod 601, the protrusion corresponds to sliding in the guide groove, and the circumferential rotation of the pressing rod 601 is prevented.

[0050] The locking rod 602 is fixed with a protruding pressing ring in the middle, and four racks are distributed on the outer wall of the locking rod 602 near the side of the locking piece 603, which can be correspondingly inserted into the tooth groove of the locking piece 603, for the cooperation of the locking piece 603 and the pressing rod 601. The outer sleeve of the end of the locking rod 602 away from the locking piece 603 is provided with a compression spring 604, and the outer sleeve of the end of the special curve stepped column 701 away from the magnetic pole net film 100 is provided with a connecting column 605. The connecting column 605 can be made of soft materials such as rubber, so that the connecting column 605 can be deformed under external force. The special curve stepped column 701 is inserted and rotatably connected to the connecting column 605 at one end, the connecting column 605 is fixed in position relative to the handle 500, the connecting column 605 corresponds to the position of the locking rod 602, and the connecting column 605 is provided with a positioning hole 606 corresponding to the locking rod 602 on the outer wall, and the locking rod 602 can be correspondingly inserted into the positioning hole 606, so that the two groups of locking rods 602 can be tightly pressed against the outer wall of the connecting column 605 from both sides.

[0051] When the sheath 300 needs to be locked, the pressing rod 601 can be pressed down, and the pressing rod 601 drives the locking rod 602 to slide to the connecting column 605 through the locking piece 603, until the locking rod 602 is inserted into the positioning hole 606 and tightly presses against the connecting column 605. At this time, the connecting column 605 is deformed and tightly presses against the outer wall of the sheath 300, the friction between the connecting column 605 and the sheath 300 limits the rotation of the sheath 300, and the compression spring 604 is compressed to generate a restoring force. During the rising process of the pressing rod 601 after being pressed down, the guide rail pressing rod 601 is pushed by the restoring force generated by the end compression spring 604 to rotate the rack of the locking rod 602 along the inclined surface of the tooth groove of the locking piece 603, and then the locking rod 602 falls into the adjacent tooth groove of the locking piece 603, realizing the extension locking of the locking rod 602, so that the locking rod 602 remains in the state of tightly pressing against the connecting column 605. The pressing rod 601 is pressed down again, and then during the rising process, the rack of the locking rod 602 rotates along the inclined surface of the tooth groove of the locking piece 603 again, and then the locking rod 602 falls into the adjacent tooth groove of the locking piece 603, realizing the retraction of the locking rod 602. At this time, the locking rod 602 is separated from the connecting column 605, and the sheath 300 is unlocked.

[0052] The implementation principle of the multifunctional ureter guide sheath is that a position sensor 103 is arranged in the magnetic pole net film 100 of the sheath tube 300, the position sensor 103 transmits position information to an external display device through a sensing wire 102 and a sensing wire external interface 800, so that the position information of the end of the sheath tube 300 can be reflected in real time through the position sensor 103 when the end of the sheath tube 300 is inserted into the human body, the steps of the operation are effectively reduced, the sheath tube 300 is used in combination with the developing ring 200 on the outer wall of the sheath tube 300, and the accuracy and safety of the operation are further ensured; and the first traction wire 105 capable of moving is arranged in the sheath tube 300, when a surgical instrument is inserted into the sheath tube 300 and extends out of the opening of the magnetic pole ring block 101, the rotating knob 400 is pushed, the rotating knob 400 drives the magnetic pole ring block 101 to close the opening through the first traction wire 105, so that the surgical instrument is clamped and fixed, and stable support can be provided for the surgical instrument; when the operation is completed, the magnetic switch device 901 can be pressed, the battery 903 supplies power to the magnetic pole ring block 101 through the magnetic pole wire 106, the magnetic pole ring block 101 generates a magnetic force after being powered on and actively closes the opening, so that the entire magnetic pole net film 100 forms a closed area, the stone debris can be prevented from falling back into the human body, and the safety of the operation is improved.

[0053] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A multifunctional ureteral guiding sheath, characterized in that: include Handle, the handle being hollow inside; The sheath is coaxially inserted into the handle, with both ends extending out of the handle. The position of the sheath relative to the handle is fixed. The internal space of the sheath is used for surgical instruments to pass through. The sheath is covered with multiple imaging rings. A magnetic pole mesh, located at one end of the sheath, is used to wrap the end of the sheath. The magnetic pole mesh includes a magnetic pole ring block, a sensing wire, a position sensor, and a thin film. The thin film covers the end of the sheath to form a spherical surrounding structure. The magnetic pole ring block is disposed at the end of the spherical surrounding structure formed by the thin film. The magnetic pole ring block has an opening coaxial with the sheath. The cavity formed inside the thin film connects the opening of the magnetic pole ring block with the internal space of the sheath. Multiple position sensors are provided and spaced apart inside the cavity formed by the thin film. The position sensors are 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 extends out of the sheath and is provided with an external interface for connecting an external display device. A rotating paddle is provided at one end of the handle near the magnetic pole mesh. The rotating paddle is sleeved outside the sheath and can slide along the length of the sheath. Two first traction wires are movably arranged inside 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 it forms through the first traction wires.

2. The multifunctional ureteral guiding sheath according to claim 1, characterized in that: The sheath contains a magnetic pole wire, and the handle contains a battery and a relay. 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. The handle is equipped with a magnetic switch, which is electrically connected to the relay. When the magnetic pole ring block is energized, it can attract to close the opening it forms.

3. The multifunctional ureteral guiding sheath according to claim 2, characterized in that: The sheath has three layers from the inside out, all of which are made of deformable elastic material. The sensing wire and the magnetic pole wire are wrapped around the bottom layer of the sheath, the first traction wire is wrapped around the middle layer of the material, and the imaging ring is sleeved around the outermost layer of the sheath.

4. The multifunctional ureteral guiding sheath according to claim 1, characterized in that: The handle is equipped with a rotation bending mechanism and a telescopic locking mechanism. The rotation 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 rotation bending mechanism to limit the rotation and bending of the sheath.

5. The multifunctional ureteral guiding sheath according to claim 4, characterized in that: The rotary bending mechanism includes a special curved stepped column and a guide rod. The special curved stepped column is sleeved and fixed outside the sheath and rotatably connected to the handle. A special curved groove is formed on the outer wall of the special curved stepped column. One end of the guide rod passes through the handle along the axis perpendicular to the special curved stepped column and is slidably connected in the special curved groove. A limiting through groove is formed on the outer wall of the handle along its own length. The rod body of the guide rod is slidably connected in the limiting through groove. The guide rod can drive the special curved stepped column to rotate during the sliding process along the limiting through groove.

6. The multifunctional ureteral guiding sheath according to claim 5, characterized in that: The special curved stepped column is fitted with and slidably connected to a guide ring. One end of the guide rod inside the handle passes through the side wall of the guide ring. A second traction wire is movably installed inside the sheath. One end of the second traction wire is fixed to the end face of the guide ring near 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.

7. The multifunctional ureteral guiding sheath according to claim 5, characterized in that: A connecting post is fitted at the end of the special curved stepped column away from the magnetic pole mesh. The connecting post is made of soft material. One end of the special curved stepped column is rotatably connected to the inside of the connecting post. The position of the connecting post relative to the handle is fixed. The telescopic locking mechanism includes two sets of locking rods. The two sets of locking rods are symmetrically distributed on both radial sides of the connecting post along the axis of the connecting post. The locking rods are slidably connected to the inside of the handle in a direction perpendicular to the axis of the connecting post. When sliding, the two sets of locking rods can simultaneously press against the outer wall of the connecting post from both sides to clamp the sheath tube and restrict the rotation of the sheath tube by the connecting post.

8. The multifunctional ureteral guiding sheath according to claim 7, characterized in that: The telescopic locking mechanism also includes a pressure rod, which corresponds one-to-one with the locking rod and is located at the end of the locking rod away from the connecting column. One end of the pressure rod extends out of 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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