Complete bladder tumor taking-out device and taking-out method thereof

Abstract

The invention discloses a bladder tumor complete taking-out device and a taking-out method thereof. A bladder tumor complete extraction device comprises an inner sheath and an outer sheath which are arranged inside and outside, and is characterized in that an opening groove is formed in the side wall of the end of the inner sheath, the inner sheath is a multi-cavity tube, a hollow negative pressure channel used for negative pressure drainage is formed in the inner sheath, and the hollow negative pressure channel is communicated with the opening groove in a butt joint mode; an inner bag is arranged in the opening groove and comprises an arc-shaped bent bag film, a strip-shaped gap is formed in the end of the bag film, the strip-shaped gap serves as an opening of the inner bag, the top of the bag film is connected with the top of the opening groove, and the bottom of the bag film is connected with the inner wall of the hollow negative pressure channel; the opening of the inner bag is connected with a bag opening tightening mechanism through a left traction line and a right traction line; a water inlet pipeline is arranged on the outer sheath, and the water inlet pipeline is butted and communicated with a gap between the inner sheath and the outer sheath; and the outer membrane is used for covering the position of the open slot of the inner sheath. The tumor is prevented from being in contact with the urethra when the inner sheath and the outer sheath are taken out.

Description

Technical Field

[0001] The present invention relates to the technical field of medical auxiliary equipment, and in particular to a tumor removal device. Background Art

[0002] Non-muscle-invasive bladder cancer is the most common bladder malignancy, with the tumor invading the mucosal layer or the mucosal lamina propria. Traditional transurethral resection of bladder tumors is the main treatment for non-muscle-invasive bladder cancer, but due to its fragmented tumor removal, there is a high risk of tumor residue and disseminated implantation recurrence after surgery, and it is unable to provide complete specimens for pathological diagnosis. The detection rate of the detrusor muscle layer is low, which often leads to underestimation of tumor staging and affects the choice of subsequent treatment.

[0003] In recent years, the transurethral en bloc resection of bladder tumors has attracted more and more attention from urologists. The transurethral en bloc resection of bladder tumors can remove the tumor in one piece, avoiding the incision and spread of the tumor. The whole tumor specimen retains a complete histological three-dimensional layer, which is conducive to a more accurate pathological diagnosis.

[0004] The size of bladder tumors is considered to be the main factor limiting the technique of en bloc resection of bladder tumors.

[0005] For larger tumors (even > 3 cm), although the operation is more difficult, it is still technically feasible. In actual work, the whole specimen is divided into 2 to 3 pieces and removed separately, which can still ensure the benefits of local complete resection of bladder tumors and accurate staging.

[0006] There are currently a variety of tumor removal devices, such as a bladder tumor extractor disclosed in publication number CN107126253A, and an umbrella-shaped negative pressure suction forceps for soft tissue specimens disclosed in publication number CN111803141A. Although these can achieve the removal of tumors, they cannot achieve the isolation of the tumor from the urethra during the removal process. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention provides a bladder tumor complete removal device and a removal method thereof, which has solved at least one of the above-mentioned technical problems.

[0008] The technical solution of the present invention is: a bladder tumor complete removal device, comprising an inner sheath and an outer sheath arranged inside and outside, characterized in that an open groove is provided on the side wall of the end of the inner sheath, the inner sheath is a multi-lumen tube, a hollow negative pressure channel for negative pressure drainage is provided on the inner sheath, and the hollow negative pressure channel is connected to the open groove;

[0009] An inner bag is arranged in the open groove, and the inner bag comprises an arc-shaped bent bag film, a strip-shaped gap is present at the end of the bag film, and the strip-shaped gap is used as the opening of the inner bag, the top of the bag film is connected to the top of the open groove, and the bottom of the bag film is connected to the inner wall of the hollow negative pressure channel;

[0010] The opening of the inner bag is connected to left and right pulling wires respectively.

[0011] The opening of the inner bag is connected to a bag opening tightening mechanism through the left pulling line and the right pulling line;

[0012] The outer sheath is provided with a water inlet pipeline, and the water inlet pipeline is connected to the gap between the inner sheath and the outer sheath;

[0013] It also includes an outer membrane for covering the opening groove position of the inner sheath, and the outer membrane is connected to the top of the outer sheath or the area of ​​the inner sheath below the opening groove.

[0014] In the present invention, after the tumor is placed in the inner bag, the bag opening tightening mechanism is tightened. If the tumor cannot be covered by the inner bag, it can be covered again by the outer membrane, thereby preventing the tumor from contacting the urethra during the process of removing the inner and outer sheaths.

[0015] Regarding the setting of the outer membrane, the details are as follows:

[0016] The outer membrane is connected to the inner sheath, and the outer membrane is connected to the area below the working cavity. After the tumor is wrapped in the inner bag, water is injected into the gap between the inner sheath and the outer sheath through the water inlet channel, and the inner sheath is pulled outward at the same time. At this time, the outer membrane wraps the working cavity due to the friction between the inner and outer sheaths and the water inflow between the inner and outer sheaths.

[0017] Alternatively, the outer membrane is arranged around the outer wall of the outer sheath in an umbrella shape that is narrow at the top and wide at the bottom, and the top central opening of the outer membrane is connected to the top outer side of the outer sheath. After the tumor is wrapped in the inner bag, the inner sheath and the outer sheath are synchronously withdrawn from the human body, and at this time, the outer membrane turns upward to wrap the working cavity due to the friction of the human body.

[0018] Regarding the setting of the opening slot, you can choose the following scheme:

[0019] As a preferred solution, the top surface of the opening groove is an inclined surface, the bottom surface of the opening groove is an inclined surface, and the top surface and the bottom surface of the opening groove are connected to form a V-shaped opening that opens radially outward.

[0020] As another preferred embodiment, the top of the inner sheath is a hemispherical convex structure, the cross-section of the inner sheath where the opening groove is opened is an arc-shaped structure, the top surface of the opening groove is an inclined surface arranged obliquely, and the lowest point of the inclined surface is connected to the top of the arc-shaped structure;

[0021] The hollow negative pressure channel is a circular structure that is concave on the side of the inner sheath water inlet channel opened on the inner sheath.

[0022] Further preferably, it further comprises an external sheath, wherein the external sheath comprises a connector and an external body which are coaxially rotatably connected;

[0023] The external body is provided with a negative pressure suction port, and the negative pressure suction port is connected to and communicated with the hollow negative pressure channel;

[0024] The connector is used for rotating and clamping the inner sheath;

[0025] The inner sheath is provided with a vertical inner sheath water inlet channel;

[0026] The external body is provided with a docking water inlet channel docking with the inner sheath water inlet channel.

[0027] It is convenient to supply water to the inner sheath through the outer sheath.

[0028] Further preferably, the lower end of the inner sheath is provided with a rotating clamping ring, a rotating limit block and a positioning protrusion which are arranged in sequence from top to bottom;

[0029] The external body is provided with a positioning groove for longitudinally inserting the positioning protrusion;

[0030] The connector is provided with a slot structure for longitudinally inserting the rotating clamping ring and rotating and clamping the rotating clamping ring;

[0031] During the rotation and clamping process of the rotation clamping ring, the clamping groove structure abuts against the rotation limiting block and rotates into place.

[0032] Further preferably, the slot structure comprises an upper limit protrusion and a lower limit protrusion arranged up and down, and the gap between the upper limit protrusion and the lower limit protrusion is a limit area for rotating and clamping the rotating clamping ring;

[0033] The external body is provided with a main body positioning point, and the connector is connected with a rotating rod and a connector positioning point;

[0034] When the connector positioning point and the main body positioning point are arranged correspondingly up and down, the inner sheath is longitudinally inserted into the connector and abuts against the connector. At this time, the rotating snap ring is located on the periphery of the area between the upper limit protrusion and the lower limit protrusion. The rotating snap ring is clamped between the upper limit protrusion and the lower limit protrusion by rotating the connector, and when the rotating limit block abuts against the upper limit protrusion, the rotation is locked in place.

[0035] Alternatively, the bottom of the outer sheath is rotatably connected to a docking sleeve;

[0036] The docking sleeve is rotatably engaged with an external sheath body, and the external sheath body is a endoscope, or the external sheath body is provided with a endoscope access channel for accessing the endoscope.

[0037] Further preferably, the bag opening tightening mechanism comprises a bag opening transverse closing push-pull rod and a bag opening longitudinal closing push-pull rod, and the bag opening transverse closing push-pull rod comprises an end stop ring, a connecting column and a first pull rod arranged in sequence from top to bottom along the axial direction;

[0038] The end stop ring is provided with a waist-shaped hole for connecting the left pulling wire and the right pulling wire to pass through side by side, and the length direction of the end stop ring is the front-to-back direction;

[0039] The two connecting posts are provided with two connecting posts, which are connected to the two ends of the end stop ring in the length direction, and the two connecting posts are connected to the end stop ring and the first pull rod to form an opening for laterally leading out the connecting line;

[0040] The bag opening longitudinal closing push-pull rod is located at the front side or the rear side of the first pull rod;

[0041] The left pulling line passes through the waist round hole and extends rightward to the right corner formed by the first pulling rod and the bag opening longitudinal closing push-pull rod;

[0042] The right pulling wire passes through the waist round hole and extends to the left to the left corner surrounded by the first pull rod and the bag opening longitudinal closing push-pull rod;

[0043] The ends of the left pulling line and the right pulling line away from the inner bag are fixed on the bag opening longitudinal closing push-pull rod.

[0044] While keeping the position of the push-pull rod for longitudinal closing of the bag opening unchanged, push and pull the push-pull rod for transverse closing of the bag opening upward to achieve transverse closure of the bottom of the bag opening, and simultaneously drive the push-pull rod for transverse closing of the bag opening and the push-pull rod for longitudinal closing of the bag opening downward, thereby pulling the bag opening longitudinally closed.

[0045] A method for removing a complete bladder tumor removal device, characterized in that it comprises the following steps:

[0046] Step 1: the inner sheath is arranged in the outer sheath;

[0047] Step 2, the inner sheath is pushed out from the outer sheath until the outer membrane completely enters the bladder;

[0048] Step 3, opening the inner bag;

[0049] Step 4: negative pressure is applied to the hollow negative pressure channel to absorb the tumor into the inner bag at the opening groove, and the tumor is restrained by the inner bag;

[0050] Step 5, the bag opening tightening mechanism closes the opening of the inner bag;

[0051] Step six, the inner sheath is pulled outwards. At this time, due to the friction between the inner and outer sheaths and the water inflow between the inner and outer sheaths, the outer membrane completely wraps the location of the opening groove, and then the tumor is removed from the urethra as a whole.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] 1. The inner bag design is used instead of the mesh bag to ensure that the tumor is completely wrapped, prevent the omission of small tumor fragments, and reduce the risk of secondary contamination.

[0054] 2. The bag opening is provided with memory metal, so that the capacity of the working chamber 220 can be expanded along with the opening, ensuring that even large tumors can be completely covered.

[0055] 3. In view of the situation that large tumors may cause the bag opening to be unable to close completely, an outer membrane design is added to further prevent the tumor from contacting the urethra and reduce the possibility of contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 This is a structural schematic diagram of a specific embodiment 1 of the present invention;

[0057] Figure 2 This is a schematic structural diagram of an inner sheath of a specific embodiment 1 of the present invention;

[0058] Figure 3 For specific embodiment 1 of the present invention Figure 2 Cross-sectional view at point A.

[0059] Figure 4 It is a schematic diagram of the local structure of the bottom of the inner sheath of the specific embodiment 1 of the present invention;

[0060] Figure 5 This is a structural schematic diagram of an external sheath according to a specific embodiment 1 of the present invention;

[0061] Figure 6 It is a cross-sectional view of the external sheath of the specific embodiment 1 of the present invention;

[0062] Figure 7 It is a schematic diagram of the partial structure of the combination of the external sheath and the inner sheath in the specific embodiment 1 of the present invention;

[0063] Figure 8 This is a schematic diagram of the bag opening in the initial state of the specific embodiment 1 of the present invention;

[0064] Fig. 9 This is a schematic diagram of a specific embodiment 1 of the present invention with the bag opening open;

[0065] Fig.10This is a schematic diagram of the bottom of the bag opening in a state of being horizontally pulled and tightened in accordance with a specific embodiment 1 of the present invention;

[0066] Fig.11 This is a schematic diagram of a bag opening in a state of being longitudinally pulled and tightened according to a specific embodiment 1 of the present invention;

[0067] Fig.12 This is a structural schematic diagram of a bag opening tightening mechanism according to a specific embodiment 1 of the present invention;

[0068] Fig.13 For specific embodiment 1 of the present invention Fig.12 A partial enlarged view of point C in the middle;

[0069] Fig.14 This is a schematic diagram of a specific embodiment 1 of the present invention when the inner sheath is not pushed out after entering the bladder;

[0070] Fig.15 This is a schematic diagram of a specific embodiment 1 of the present invention when the inner sheath is pushed out after entering the bladder;

[0071] Fig.16 It is a schematic diagram of a specific embodiment 1 of the present invention in a working state;

[0072] Fig.17 This is a schematic diagram of a package in an ex vivo state according to a specific embodiment 1 of the present invention;

[0073] Fig.18 A structural schematic diagram of a specific embodiment 2 of the present invention;

[0074] Fig.19 It is a schematic diagram of the local structure of the opening groove of the specific embodiment 3 of the present invention;

[0075] Fig. 20 This is a schematic diagram of the structure of the outer sheath of specific embodiment 4 of the present invention;

[0076] Fig.21 It is a structural schematic diagram of a speculum according to a specific embodiment 4 of the present invention;

[0077] Fig. 22 For the present invention Fig.21 A partial enlarged view of the F in the middle;

[0078] Fig.23 It is a schematic diagram of the structure of the outer sheath and the docking sleeve in the specific embodiment 4 of the present invention;

[0079] Fig.24 It is a structural schematic diagram of a specific embodiment 4 of the present invention;

[0080] Fig.25 It is a structural schematic diagram of a specific embodiment 5 of the present invention;

[0081] Fig.26It is a structural schematic diagram of the external sheath in specific embodiment 5 of the present invention.

[0082] In the figure, 100 is the outer sheath, 110 is the outer sheath body, 120 is the bottom of the outer sheath, 130 is the water inlet pipeline, 140 is the docking sleeve; 1402 is the lower protrusion of the rotating ring;

[0083] 200 is the inner sheath, 210 is the head, 2101 is the top surface, 220 is the opening groove, 2301 is the inner sheath water inlet channel, 2302 is the hollow negative pressure channel, 2303 is the positioning protrusion, 2304 is the scale line, 2305 is the rotating clamping ring, and 2306 is the rotating limit block;

[0084] 300 is a endoscope, 310 is a lens, 320 is a light source, 340 is a tube body of the endoscope, 350 is an instrument channel, 360 is a signal light source transmission channel, 370 is an observation mirror; 3401 is a positioning pin, and 3402 is a rotating positioning ring;

[0085] 400 is the outer membrane;

[0086] 500 is the inner bag, 520 is the opening of the inner bag,

[0087] 600 is a bag opening tightening mechanism; 610 is a push-pull rod for closing the bag opening longitudinally, 620 is a push-pull rod for closing the bag opening transversely, 6201 is an end stop ring, and 6202 is a connecting column;

[0088] 700 is an external sheath, 710 is a connector, 7101 is a rotating rod, 7102 is an upper limit protrusion, 7103 is a lower limit protrusion, 7104 is a connector positioning point, 720 is a sealing ring; 7100 is an external positioning pin, 7200 is an external rotating positioning ring, 7300 is an external instrument channel, 7400 is an external endoscope channel, and 7600 is a docking device.

[0089] 730 is the external body, 7301 is the negative pressure suction port, 7302 is the docking water inlet channel, 7305 is the main body positioning point, and 7306 is the positioning groove. DETAILED DESCRIPTION

[0090] See also Figures 1 to 18Specific embodiment 1, a bladder tumor complete removal device, including an inner sheath 200 and an outer sheath 100 arranged inside and outside, an opening groove 220 is provided on the side wall of the end of the inner sheath 200, the inner sheath 200 is a multi-lumen tube, a hollow negative pressure channel 2302 for negative pressure drainage is provided on the inner sheath 200, and the hollow negative pressure channel 2302 is connected to the opening groove 220; an inner bag 500 is provided in the opening groove 220, and the inner bag 500 includes an arc-shaped bent bag film, and a strip gap exists at the end of the bag film, and the strip gap is used as an opening 520 of the inner bag. The top of the bag film is connected to the top of the opening groove 220, and the bottom of the bag film is connected to the inner wall of the hollow negative pressure channel 2302; the two sides of the opening 520 of the inner bag are respectively connected with the left pulling line and the right pulling line arranged on the left and right; the opening 520 of the inner bag is connected to a bag tightening mechanism 600 through the left pulling line and the right pulling line; the outer sheath 100 is provided with a water inlet pipeline 130, and the water inlet pipeline 130 is connected to the gap between the inner sheath 200 and the outer sheath 100; it also includes an outer film 400 for covering the position of the opening groove 220 of the inner sheath 200. In the present invention, after the tumor is placed in the inner bag 500, the bag opening tightening mechanism 600 is tightened. If the inner bag 500 cannot cover the tumor, it can be covered for a second time through the outer membrane 400. When the device wrapped with the tumor is pulled out of the urethra as a whole, the outer membrane tightly wraps the tumor under the action of the inner opening of the urethra. The outer membrane plays an isolating role, preventing the tumor from contacting the urethra during the removal of the inner and outer sheaths.

[0091] The configuration of the outer membrane 400 is as follows:

[0092] The outer membrane 400 is connected to the inner sheath 200, and the outer membrane 400 is connected to the area below the working cavity. After the tumor is wrapped in the inner bag 500, water is injected into the gap between the inner sheath 200 and the outer sheath 100 through the water inlet channel, and the inner sheath 200 is pushed outward. At this time, the outer membrane 400 wraps the working cavity due to the friction between the inner and outer sheaths and the water inflow between the inner and outer sheaths.

[0093] The configuration of the opening slot 220 is as follows:

[0094] The top of the inner sheath 200 is a head 210 of a hemispherical convex structure, the cross section of the inner sheath 200 where the opening groove is provided is an arc structure, the top surface of the opening groove is an inclined surface arranged obliquely, and the lowest point of the inclined surface is connected to the top of the arc structure. The hollow negative pressure channel 2302 is a circular structure concave on the side of the inner sheath water inlet channel 2301 provided on the inner sheath.

[0095] It also includes an external sheath 700, which includes a connector 710 and an external body 730 that are coaxially rotatably connected; the external body 730 is provided with a negative pressure suction port 7301, which is connected to the hollow negative pressure channel 2302; the connector 710 is used to rotate and clamp the inner sheath 200; the inner sheath 200 is provided with a vertically arranged inner sheath water inlet channel 2301; the external body 730 is provided with a docking water inlet channel 7302 that docks the inner sheath water inlet channel 2301. It is convenient to supply water to the inner sheath 200 through the external sheath 700. The top of the negative pressure suction port 7301 is provided with a crescent-shaped docking interface extending upward, and the outer wall of the crescent-shaped docking interface is covered with a sealing ring 720, which is located between the crescent-shaped docking interface and the hollow negative pressure channel 2302 of the inner sheath 200. An extension tube is provided at the notch of the crescent-shaped docking interface. The outer wall of the inner sheath 200 is provided with a scale line 2304. The zero point of the scale line 2304 is located at the lower end of the inner sheath 200. The docking water inlet channel 7302 is provided with an extension tube extending upward, and the extension tube extends into the inner sheath water inlet channel 2301.

[0096] The lower end of the inner sheath 200 is provided with a rotating clamping ring 2305, a rotating limit block 2306 and a positioning protrusion 2303 which are arranged in sequence from top to bottom; a positioning groove 7306 for longitudinally inserting the positioning protrusion 2303 is provided on the external body 730; a clamping groove structure for longitudinally inserting the rotating clamping ring 2305 and rotating the rotating clamping ring 2305 is provided on the connector 710; during the rotating clamping process of the rotating clamping ring 2305, the clamping groove structure abuts against the rotating limit block 2306 and rotates into place.

[0097] The slot structure includes an upper limit protrusion 7102 and a lower limit protrusion 7103 arranged up and down, and the gap between the upper limit protrusion 7102 and the lower limit protrusion 7103 is a limit area for rotating and snapping into the rotating snap ring 2305; a main body positioning point 7305 is arranged on the external body 730, and a rotating rod 7101 and a connector positioning point 7104 are connected to the connector 710; when the connector positioning point 7104 and the main body positioning point 7305 are arranged correspondingly up and down, the inner sheath 200 is longitudinally inserted into the connector 710 and abuts against the connector 710. At this time, the rotating snap ring 2305 is located at the periphery of the area between the upper limit protrusion 7102 and the lower limit protrusion 7103, and the rotating snap ring 2305 is snapped between the upper limit protrusion 7102 and the lower limit protrusion 7103 by rotating the connector 710, and when the rotation limit block 2306 abuts against the upper limit protrusion 7102, the rotation is locked in place.

[0098] The bag opening tightening mechanism 600 includes a bag opening transverse closing push-pull rod 620 and a bag opening longitudinal closing push-pull rod 610. The bag opening transverse closing push-pull rod 620 includes an end limit ring 6201, a connecting column 6202 and a first pull rod arranged in sequence from top to bottom along the axial direction; a waist-shaped hole for connecting the left pulling line and the right pulling line to pass side by side is opened on the end limit ring 6201, and the length direction of the end limit ring 6201 is the front-to-back direction; there are two connecting columns 6202, and the two connecting columns 6202 are connected to the two ends of the end limit ring 6201 in the length direction. The two connecting posts 6202 are connected to each other, and the end stop ring 6201 and the first pull rod are connected to form an opening for lateral lead-out of the connection line; the push-pull rod 610 for longitudinal closing of the bag opening is located at the front or rear side of the first pull rod; the left pull line passes through the waist hole and extends to the right to the right corner formed by the first pull rod and the push-pull rod 610 for longitudinal closing of the bag opening; the right pull line passes through the waist hole and extends to the left to the left corner formed by the first pull rod and the push-pull rod 610 for longitudinal closing of the bag opening; the ends of the left pull line and the right pull line away from the inner bag 500 are fixed on the push-pull rod 610 for longitudinal closing of the bag opening. While keeping the position of the push-pull rod 610 for longitudinal closing of the bag opening unchanged, the push-pull rod 620 for transverse closing of the bag opening is pushed upward to realize the transverse closing of the bottom of the bag opening, and the push-pull rod 620 for transverse closing of the bag opening and the push-pull rod 610 for longitudinal closing of the bag opening are pulled downward synchronously, so that the bag opening is longitudinally pulled and closed.

[0099] The left pull wire and the right pull wire are both made of metal or polymer materials with high resilience, such as nickel-titanium alloy, stainless steel or PEEK material. The tops of the left pull wire and the right pull wire are respectively inserted on the left and right sides of the bag opening. The tops of the left pull wire and the right pull wire are fixedly connected to the top of the bag opening and the inner sheath.

[0100] See also Figures 8 to 11 This is a schematic diagram of the bag opening change. In the initial state, see Figure 8 , the opening of the inner bag 500 is strip-shaped. When entering the bladder opening, the opening of the inner bag 500 opens, so that the inner bag 500 is stretched open, see Fig. 9 While keeping the position of the push-pull rod 610 for closing the bag opening longitudinally unchanged, push and pull the push-pull rod 620 for closing the bag opening transversely upward to achieve transverse closure of the bottom of the bag opening, see Fig.10 , synchronously driving the bag opening transverse closing push-pull rod 620 and the bag opening longitudinal closing push-pull rod 610 to pull downward, thereby pulling the bag opening longitudinally closed. Fig.11 .

[0101] Working principle, see Fig.14 , the end of the outer sheath 100 has begun to enter the bladder, while the inner sheath 200 is still covered by the outer sheath 100. Fig.15, showing the state in which the inner sheath 200 is pushed out from the outer sheath 100 until the outer membrane 400 completely enters the bladder. Whether the outer membrane is completely pushed out can be determined from the outside by checking the zero position of the scale line.

[0102] See also Fig.16 , showing the working stage of this example. In this stage, the deformation of the high resilience material of the bag mouth of the inner bag causes the inner bag 500 to open. The operator accurately locates the position of the tumor through the endoscope 300, salvages the tumor through the inner bag 500, and assists with the negative pressure water outlet channel 2302 to absorb and fix the tumor. In this process, the tumor is guided to be restrained by the inner bag 500. At this time, the outer membrane 400 is in a free floating state.

[0103] See also Fig.17 This is the stage of wrapping and ex vivo. In this stage, the operator first pulls the horizontal closing push-pull rod 620 to close the bag mouth horizontally, and then pulls the vertical closing push-pull rod 610 to tightly wrap the tumor with the inner bag 500. As the inner sheath 200 is pulled outward, water is injected into the gap between the inner and outer sheaths through the outer sheath water inlet channel 130. The water flow and friction force cause the outer membrane 400 to reverse, and the entire working cavity is additionally wrapped. This process effectively avoids the tumor from contacting the bladder and urethra again, ensuring the safety of the operation and the complete removal of the tumor.

[0104] A channel for inserting an endoscope is provided in the inner sheath. The endoscope and the inner sheath are arranged inside and outside the sheath body. The endoscope is a standard 30° oblique opening endoscope, and the opening direction faces the outside of the working cavity.

[0105] A method for removing a complete bladder tumor removal device, characterized in that it comprises the following steps:

[0106] Step 1: The inner sheath 200 is arranged in cooperation with the outer sheath 100;

[0107] Step 2: The inner sheath 200 is pushed out from the outer sheath 100 until the outer membrane 400 completely enters the bladder;

[0108] Step 3: Open the inner bag;

[0109] Step 4: The hollow negative pressure channel 2302 is connected to negative pressure to absorb the tumor into the inner bag 500 at the opening groove 220 and restrain it by the inner bag 500;

[0110] Step 5: The bag opening tightening mechanism 600 closes the opening 520 of the inner bag;

[0111] Step six, the inner sheath 200 is pulled outwards. At this time, due to the friction between the inner and outer sheaths and the water inflow between the inner and outer sheaths, the outer membrane 400 completely wraps the position of the opening groove 220, and then the tumor is removed as a whole.

[0112] Compared with the prior art, the beneficial effects of this specific embodiment 1 are as follows:

[0113] 1. The inner bag 500 design is used instead of the mesh bag to ensure that the tumor is completely wrapped, prevent the omission of small tumor fragments, and reduce the risk of secondary contamination.

[0114] 2. The bag opening is provided with a high resilience material, so that the capacity of the working chamber 220 can be expanded along with the opening, ensuring that even a large tumor can be completely wrapped.

[0115] 3. In view of the situation that large tumors may cause the bag opening to be unable to close completely, the design of outer membrane 400 is added to further prevent the contact between the tumor and the urethra and reduce the chance of dissemination and implantation.

[0116] See also Fig.18 Specific embodiment 2 is based on specific embodiment 1, but differs from it in the setting of the outer membrane.

[0117] The outer membrane 400 is arranged around the outer wall of the outer sheath in an umbrella shape that is narrow at the top and wide at the bottom, and the top central opening of the outer membrane 400 is connected to the top outer side of the outer sheath 400. After the tumor is wrapped in the inner bag 500, the inner sheath 200 and the outer sheath 100 are simultaneously withdrawn from the human body. At this time, the outer membrane 400 turns upward to wrap the working cavity due to the friction of the human body.

[0118] See also Fig.19 Specific embodiment 3, based on specific embodiment 1, the difference is that the head 210 of the inner sheath 200 is a hemispherical convex structure. The top surface 2101 of the opening groove 220 is an inclined surface arranged at an angle, and the bottom surface of the opening groove 220 is an inclined surface arranged at an angle, and the top surface and the bottom surface of the opening groove 220 are connected to form a V-shaped opening that opens radially outward. The hollow negative pressure channel 2302 is a circular structure that is concave on the side of the inner sheath water inlet channel 2301 opened near the inner sheath.

[0119] See also Figure 20 to Figure 24 Specific embodiment 4 is based on specific embodiment 1, except that the bottom of the inner sheath is not provided with a docking sleeve. The inner sheath water inlet channel is removed from the inner sheath. The bladder is filled through the outer sheath water inlet channel.

[0120] The bottom of the outer sheath 100 is rotatably connected to a docking sleeve; the docking sleeve is rotatably engaged with an external sheath body, and the external sheath body is a endoscope 300.

[0121] A lens 310 , a light source 320 , and an instrument channel 350 are arranged at the end of the endoscope 300 , and the inner sheath 200 is nested in the instrument channel 350 .

[0122] Similar to the connection structure of the external sheath and the inner sheath in the specific embodiment 1, see Fig.23The outer sheath is sequentially connected with a positioning pin 3401 and a rotating positioning ring 3402 from top to bottom. A positioning socket for inserting the positioning pin 3401 is provided at the bottom of the outer sheath. The positioning pin 3401 is used for positioning the outer sheath 100 and the endoscope 300.

[0123] See also Fig.24 The docking sleeve is provided with a rotating ring lower protrusion 1402 for rotating and engaging the rotating positioning ring 3402. When the rotating positioning ring 3402 is axially inserted into the area between the rotating ring lower protrusion 1402 and the bottom of the outer sheath 100, the positioning pin 3401 is inserted into the positioning jack, and after axial limiting, the docking sleeve is rotated circumferentially, thereby realizing the rotating engagement of the docking sleeve and the outer sheath.

[0124] The outer sheath is composed of four parts: an outer sheath body 110, an outer sheath bottom 120, a water inlet pipeline 130 and a docking sleeve 140. The outer sheath body 110 is a single-lumen cylindrical body, and its lower end is sleeved with the docking sleeve 140, and the two can rotate coaxially. There is an open channel on the outer sheath bottom 120, which is the water inlet channel 130. When the outer sheath is nested into the human body, a ring pipeline is formed between the outer sheath 100 and the endoscope 300, and water can be injected into the bladder through the ring pipeline.

[0125] The end of the endoscope 300 is provided with a lens 310, a light source 320 and an instrument channel 350. The middle of the endoscope body 340 is provided with a connection structure, which is a positioning pin 3401 and a rotating positioning ring 3402. The instrument channel 350 can pass through the inner sheath 200. The endoscope is provided with a signal light source transmission channel 360 and an observation mirror 370.

[0126] See also Fig.25 as well as Fig.26 , Specific embodiment 5, on the basis of specific embodiment 1, the bottom of the outer sheath 100 is rotatably connected to a docking sleeve; the docking sleeve is rotatably engaged with an outer sheath body 700.

[0127] Similar to the connection structure of the external sheath and the inner sheath in the specific embodiment 1, the external sheath body is sequentially connected with an external rotating positioning ring 7200 from top to bottom. A positioning socket for inserting the external positioning pin 7100 is provided at the bottom of the external sheath.

[0128] The docking sleeve is provided with an upper protrusion and a lower protrusion for rotational engagement. When the external rotating positioning ring 7200 is axially inserted into the area between the upper protrusion and the lower protrusion, the external positioning pin 7100 is inserted into the positioning socket, and after axial limiting, the docking sleeve is rotated circumferentially, thereby realizing the rotational engagement of the docking sleeve and the outer sheath.

[0129] The external sheath body 700 is provided with an external instrument channel 7300 and an external endoscope channel 7400, and the end of the external endoscope channel 7400 is connected to the endoscope 300 via a docking device 7600. The external endoscope channel 7400 is used to pass through the inner sheath.

[0130] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A complete bladder tumor removal device, comprising an inner sheath and an outer sheath arranged inside and outside, characterized in that: An open groove is provided on the side wall of the end of the inner sheath, the inner sheath is a multi-lumen tube, a hollow negative pressure channel for negative pressure drainage is provided on the inner sheath, and the hollow negative pressure channel is connected to the open groove; An inner bag is arranged in the open groove, and the inner bag comprises an arc-shaped bent bag film, a strip-shaped gap is present at the end of the bag film, and the strip-shaped gap is used as the opening of the inner bag, the top of the bag film is connected to the top of the open groove, and the bottom of the bag film is connected to the inner wall of the hollow negative pressure channel; The opening of the inner bag is connected to left and right pulling wires respectively. The opening of the inner bag is connected to a bag opening tightening mechanism through the left pulling line and the right pulling line; The outer sheath is provided with a water inlet pipeline, and the water inlet pipeline is connected to the gap between the inner sheath and the outer sheath; It also includes an outer membrane for covering the opening groove position of the inner sheath, and the outer membrane is connected to the top of the outer sheath or the area of ​​the inner sheath below the opening groove.

2. A bladder tumor complete removal device according to claim 1, characterized in that: The top surface of the opening groove is an inclined surface, and the bottom surface of the opening groove is an inclined surface. The top surface and the bottom surface of the opening groove are connected to form a V-shaped opening that opens radially outward.

3. A bladder tumor complete removal device according to claim 1, characterized in that: The top of the inner sheath is a hemispherical convex structure, the cross section of the inner sheath where the opening groove is opened is an arc-shaped structure, the top surface of the opening groove is an inclined surface arranged obliquely, and the lowest point of the inclined surface is connected to the top of the arc-shaped structure; The hollow negative pressure channel is a circular structure that is concave on the side of the inner sheath water inlet channel opened on the inner sheath.

4. A bladder tumor complete removal device according to claim 1, characterized in that: Also included is an external sheath, the external sheath comprising a connector and an external body that are coaxially rotatably connected; The external body is provided with a negative pressure suction port, and the negative pressure suction port is connected to and communicated with the hollow negative pressure channel; The connector is used for rotating and clamping the inner sheath; The inner sheath is provided with a vertical inner sheath water inlet channel; The external body is provided with a docking water inlet channel docking with the inner sheath water inlet channel.

5. A bladder tumor complete removal device according to claim 4, characterized in that: The lower end of the inner sheath is provided with a rotating clamping ring, a rotating limit block and a positioning protrusion arranged in sequence from top to bottom; The external body is provided with a positioning groove for longitudinally inserting the positioning protrusion; The connector is provided with a slot structure for longitudinally inserting the rotating clamping ring and rotating and clamping the rotating clamping ring; During the rotation and clamping process of the rotation clamping ring, the clamping groove structure abuts against the rotation limiting block and rotates into place.

6. A bladder tumor complete removal device according to claim 5, characterized in that: The slot structure comprises an upper limit protrusion and a lower limit protrusion arranged above and below, and the gap between the upper limit protrusion and the lower limit protrusion is a limit area for rotating and clamping the rotating clamping ring; The external body is provided with a main body positioning point, and the connector is connected with a rotating rod and a connector positioning point; When the connector positioning point and the main body positioning point are arranged correspondingly up and down, the inner sheath is longitudinally inserted into the connector and abuts against the connector. At this time, the rotating snap ring is located on the periphery of the area between the upper limit protrusion and the lower limit protrusion. The rotating snap ring is clamped between the upper limit protrusion and the lower limit protrusion by rotating the connector, and when the rotating limit block abuts against the upper limit protrusion, the rotation is locked in place.

7. The complete bladder tumor removal device according to claim 1, characterized in that: The docking sleeve is rotatably engaged with an external sheath body, and the external sheath body is a endoscope, or the external sheath body is provided with a endoscope access channel for accessing the endoscope.

8. The complete bladder tumor removal device according to claim 1, characterized in that: The bag opening tightening mechanism comprises a bag opening transverse closing push-pull rod and a bag opening longitudinal closing push-pull rod, wherein the bag opening transverse closing push-pull rod comprises an end stop ring, a connecting column and a first pull rod arranged in sequence from top to bottom along the axial direction; The end stop ring is provided with a waist-shaped hole for connecting the left pulling wire and the right pulling wire to pass through side by side, and the length direction of the end stop ring is the front-to-back direction; The two connecting posts are provided with two connecting posts, which are connected to the two ends of the end stop ring in the length direction, and the two connecting posts are connected to the end stop ring and the first pull rod to form an opening for laterally leading out the connecting line; The bag opening longitudinal closing push-pull rod is located at the front side or the rear side of the first pull rod; The left pulling line passes through the waist round hole and extends rightward to the right corner formed by the first pulling rod and the bag opening longitudinal closing push-pull rod; The right pulling wire passes through the waist round hole and extends to the left to the left corner surrounded by the first pull rod and the bag opening longitudinal closing push-pull rod; The ends of the left pulling line and the right pulling line away from the inner bag are fixed on the bag opening longitudinal closing push-pull rod.

9. The method for removing a bladder tumor complete removal device according to claim 1, characterized in that: The outer membrane is connected to the inner sheath, and the outer membrane is connected to the area below the working cavity; Also included is an external sheath, the external sheath comprising a connector and an external body that are coaxially rotatably connected; The external body is provided with a negative pressure suction port, and the negative pressure suction port is connected to and communicated with the hollow negative pressure channel; The connector is used for rotating and clamping the inner sheath; The inner sheath is provided with a vertical inner sheath water inlet channel; The external body is provided with a docking water inlet channel docking with the inner sheath water inlet channel.

10. A method for removing a complete bladder tumor removal device according to claim 9, characterized in that: The steps include: Step 1: the inner sheath is arranged in the outer sheath; Step 2, the inner sheath is pushed out from the outer sheath until the outer membrane completely enters the bladder; Step 3, the opening of the inner bag is opened; Step 4: negative pressure is applied to the hollow negative pressure channel to absorb the tumor into the inner bag at the opening groove, and the tumor is restrained by the inner bag; Step 5, the bag opening tightening mechanism closes the opening of the inner bag; Step six, the inner sheath is pulled outwards. At this time, due to the friction between the inner and outer sheaths and the water inflow between the inner and outer sheaths, the outer membrane completely wraps the location of the opening groove, and then the tumor is removed from the urethra as a whole.

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