CN219230029U - Ureter guiding sheath and guiding device - Google Patents

Abstract

In order to solve the technical problem that the insertion and water injection of the existing guiding sheath instrument and the like cannot be performed simultaneously, the application provides a ureteral guiding sheath and a guiding device. The sheath tube comprises a sheath tube channel, a first elastic material layer, a supporting structure layer and a second elastic material layer which are sequentially arranged from inside to outside, wherein the first elastic material layer forms the outer wall of the sheath tube channel, the sheath tube channel comprises a first liquid inlet and a first liquid outlet, and the first liquid outlet is connected with a sheath tube joint; a plurality of pouring channels are arranged in the second elastic material layer, each pouring channel comprises a second liquid inlet, a second liquid outlet and a third liquid outlet, the second liquid inlet is communicated with the sheath pipe joint, and the second liquid outlet and the first liquid inlet are arranged at the same end of the sheath pipe; the third liquid outlet is arranged on the outer wall of the second elastic material layer and is positioned at one end of the second elastic material layer, which is close to the second liquid outlet. The ureteral guide sheath that this application provided fills the passageway and is used for the water injection, liberates space and the passageway of apparatus such as ureteroscope, improves operation efficiency.

Description

Ureter guiding sheath and guiding device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a ureteral guiding sheath and a guiding device.

Background

Ureteral introducer sheaths are commonly used in urological minimally invasive therapeutic procedures, and generally comprise a sheath tube and a sheath tube connector. The urological minimally invasive therapeutic surgery comprises the following steps: during operation, the sheath tube is sequentially inserted into the bladder and ureter of a patient along the guide wire, finally reaches the renal pelvis and approaches to the calculus, a ureteroscope, an instrument and the like are placed in a channel of a ureter guiding sheath, and under the action of lithotripter and other lithotripter equipment, accurate lithotripter is carried out, and the calculus is crushed and then taken out. In the operation process, water injection is needed to keep clear operation vision, in the prior art, the water injection is carried out through a channel between the ureteroscope and the sheath, because the channel is small in size, the water injection can only be paused firstly when different operation instruments need to be replaced in the operation, then the previous water injection channel is used for inserting the instruments, the ureteroscope is not clear in sight line or the instruments need to be pulled out for timely water injection flushing when broken stone is flushed, the operation time is prolonged by frequently disassembling the water injection, and unnecessary pain is added to a patient. Meanwhile, through the water injection operation of the channel between the ureteroscope and the sheath, water is ejected from the channel, the number of water outlets is only one, the periphery of the sheath cannot be directly flushed, the water injection efficiency is low, and the broken stone removal efficiency is low.

Disclosure of Invention

The utility model provides a ureter guiding sheath and guiding device, aiming at the technical problems that the prior ureter guiding sheath can not realize that the insertion of instruments and the like and water injection are simultaneously carried out, and the direction of a water outlet is single, and the periphery of a sheath tube can not be directly flushed.

In order to solve the problems, the application provides a ureter guiding sheath, which comprises a sheath tube and a sheath tube joint, wherein the sheath tube comprises a sheath tube channel, a first elastic material layer, a supporting structure layer and a second elastic material layer which are sequentially arranged from inside to outside, the first elastic material layer forms the outer wall of the sheath tube channel, the sheath tube channel comprises a first liquid inlet and a first liquid outlet, and the first liquid outlet is connected with the sheath tube joint; a plurality of pouring channels are arranged in the second elastic material layer, each pouring channel comprises a second liquid inlet, a second liquid outlet and a third liquid outlet, the second liquid inlets and the second liquid outlets are respectively arranged at two ends of each pouring channel, the second liquid inlets are communicated with the sheath pipe joints, and the second liquid outlets and the first liquid inlets are arranged at the same end of the sheath pipe; the third liquid outlet is formed in the outer wall of the second elastic material layer and is located at one end, close to the second liquid outlet, of the second elastic material layer.

Preferably, the included angle between the third liquid outlet and the extending direction of the sheath tube is less than or equal to 90 degrees.

Preferably, the sheath pipe joint is provided with a water inlet joint, a water outlet joint and a first channel, the second liquid inlet is connected with the water inlet joint, and the water outlet joint and the first channel are respectively communicated with the first liquid outlet. Preferably, the shape of the nozzle of the sheath near one end of the second liquid outlet is a convex nozzle structure, a concave nozzle structure or a planar nozzle structure.

Preferably, the support structure layer comprises a bendable section and a straight line section, the straight line section is connected between the bendable section and the sheath pipe joint, the bendable section comprises at least two mortise and tenon joint connectors, the mortise and tenon joint connectors are arranged in the support structure layer, and each mortise and tenon joint connector is sequentially inserted in the extending direction of the straight line section; the bendable section is used for bending relative to the straight line section through relative sliding among the mortise and tenon joint connectors when the bendable section receives lateral force;

the second liquid outlet, the first liquid inlet and the third liquid outlet are arranged on the bendable section.

Preferably, the mortise and tenon joint connector comprises a first body, at least two first joint parts and at least two second joint parts, wherein the first joint parts and the second joint parts are symmetrically connected to two opposite sides of the first body; a first plug-in chute for allowing the second plug-in part of the adjacent mortise and tenon plug-in piece to be inserted and relatively slide is formed between the two first plug-in parts; and a second plug-in chute for allowing the first plug-in parts of the adjacent mortise and tenon plug-in parts to be inserted and relatively slide is formed between the two second plug-in parts.

Preferably, the mortise and tenon joint comprises a second body, a first rotating groove arranged on the first side of the second body, a first stop block connected on the second side of the second body, and a first rotating block connected on the second side of the first stop block; the first rotating groove is provided with a first opening for the first stop block of the adjacent mortise and tenon joint to pass through, and is used for accommodating the first rotating block of the adjacent mortise and tenon joint; the maximum width of the first rotating block is larger than the width of the first opening; when the bendable section is bent, the first rotating block and the first rotating groove rotate relatively, and when the first rotating blocks of the two adjacent mortise-tenon connectors are abutted by the edges of the first opening, the two adjacent mortise-tenon connectors stop rotating.

Preferably, the mortise and tenon joint further comprises a second stop block connected to the inner side wall of the first rotating groove and a second rotating block connected to the first side of the second stop block and positioned in the first rotating groove; the first rotating block is provided with a second rotating groove, and the second rotating groove is provided with a second opening which is arranged away from the first opening and used for allowing a second stop block of an adjacent mortise and tenon joint to pass through; the second rotating groove is used for accommodating the second rotating block of the adjacent mortise and tenon joint; the maximum width of the second rotating block is larger than the width of the second opening; when the bendable section is bent, the first rotating block and the first rotating groove rotate relatively, the second rotating block and the second rotating groove rotate relatively, and when the first rotating block of two adjacent tenon-and-mortise connectors are abutted with the edge of the first opening or the second rotating block of two adjacent tenon-and-mortise connectors are abutted with the edge of the second opening, the two adjacent tenon-and-mortise connectors stop rotating.

Preferably, the mortise and tenon joint further comprises a third stop block connected to the inner side wall of the second rotating groove and a third rotating block connected to the third stop block and positioned in the second rotating groove; a third rotating groove is formed in the second rotating block, and a third opening for allowing a third stop block of the adjacent mortise-tenon joint to pass through is formed in the third rotating groove; the third rotating groove is used for accommodating the adjacent third rotating blocks of the mortise and tenon joint; the maximum width of the third rotating block is larger than the width of the third opening; when the bendable section is bent, the first rotating block and the first rotating groove rotate relatively, the second rotating block and the second rotating groove rotate relatively, the third rotating block and the third rotating groove rotate relatively, and when the first rotating block and the first opening of the adjacent two mortise and tenon joint pieces are in abutting joint, the second rotating block and the second opening are in abutting joint, or the third rotating block and the third opening are in abutting joint, the adjacent two mortise and tenon joint pieces stop rotating.

In another aspect, the present application provides an introducer device comprising a dilator and a ureteral introducer sheath as described above, the dilator being connected to the ureteral introducer sheath through the sheath connector.

The utility model has the beneficial effects that:

compared with the prior art, the ureteral guiding sheath provided by the application has the advantages that the sheath channel is used for inserting or extracting the ureteroscope and other instruments, so that the ureteroscope and other instruments enter the renal pelvis through the sheath channel to carry out operations such as lithotripsy and removal; the plurality of perfusion channels arranged on the second elastic material layer are used for injecting water, liberating the space and channels of ureteroscope and other instruments, avoiding frequent disassembly of the water injection in operation, prolonging the operation time, improving the operation efficiency and reducing the pain of patients. The pouring channel is provided with a plurality of third liquid outlets and second liquid outlets, water can be ejected from the second liquid outlets along the extending direction of the pouring channel, water can be ejected from the third liquid outlets on the side wall of the pouring channel, broken stone, impurities and the like on the periphery of the sheath are flushed, the visual field definition of the ureteroscope is improved through flushing at various angles, the water injection efficiency and the broken stone clearing efficiency are improved, and the operation time is shortened.

Drawings

FIG. 1 is a schematic view of a guide structure;

FIG. 2 is a schematic top view of the sheath;

FIG. 3 is a schematic cross-sectional view of the sheath-third outlet at an angle of 60℃with respect to the direction of extension of the sheath;

FIG. 4 is a schematic cross-sectional view of the sheath-third outlet at an angle of 90℃to the direction of extension of the sheath;

FIG. 5 is a schematic view of the shape and configuration of a sheath-concave nozzle;

FIG. 6 is a schematic view of the shape and configuration of a sheath-planar orifice;

FIG. 7 is a schematic view of the shape and configuration of a sheath-convex nozzle;

fig. 8 is a schematic diagram of a ureteral introducer sheath according to an embodiment;

FIG. 9 is a schematic view of a mortise and tenon joint in an embodiment;

fig. 10 is a schematic diagram of a ureteral introducer sheath according to an embodiment;

FIG. 11 is a schematic view of a second mortise plug connector;

fig. 12 is a schematic view of the structure of a three ureteral introducer sheath according to an embodiment;

FIG. 13 is a schematic view of a three mortise plug connector in an embodiment;

fig. 14 is a schematic view of the ureteral introducer sheath bending structure.

Reference numerals in the drawings of the specification are as follows:

1. a sheath; 11. a sheath channel; 12. a first layer of elastomeric material; 13. a support structure layer; 14. a second layer of elastomeric material; 15. a perfusion channel; 151. a second liquid outlet; 152. a third liquid outlet; 2. a dilator; 3. a sheath tube joint; 31. a water inlet joint; 32. a first channel; 33. a water outlet joint; 4. a bendable section; 41. mortise and tenon joint pieces; 411. a first body; 412. a first plug-in connection; 4121. a first plug; 4122. a first connection section; 4123. a first arcuate surface; 413. a first plug-in chute 413; 4131. a first limit port; 4132. a first arc-shaped groove; 414. a second plug-in connection; 4141. a second plug; 4142. a second connection section; 4143. a second arcuate surface; 415. a second plug-in chute 415; 4151. a second limit port; 4152. a second arc-shaped groove; 416. a second body; 4161. a first rotating groove; 4162. a first stopper; 4163. a first rotating block; 41611. a first opening; 4164. a second stopper; 4165. a second rotating block; 4166. a second rotating groove; 41661. a second opening; 4167. a third rotating groove; 41671. a third opening; 4168. a third rotating block; 4169. a third stopper; 417. a first buckle; 418. a second buckle; 419. a first clamping groove; 420. a second clamping groove; 5. straight line segments.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1-14, the application provides a ureter guiding sheath, which comprises a sheath tube 1 and a sheath tube joint 3, wherein the sheath tube 1 comprises a sheath tube channel 11, a first elastic material layer 12, a supporting structure layer 13 and a second elastic material layer 14 which are sequentially arranged from inside to outside, the first elastic material layer 12 forms the outer wall of the sheath tube channel 11, the sheath tube channel 11 comprises a first liquid inlet and a first liquid outlet, and the first liquid outlet is connected with the sheath tube joint 3; a plurality of pouring channels 15 are arranged in the second elastic material layer 14, the pouring channels 15 comprise a second liquid inlet, a second liquid outlet 151 and a third liquid outlet 152, the second liquid inlet and the second liquid outlet 151 are respectively arranged at two ends of the pouring channels 15, the second liquid inlet is communicated with the sheath tube joint 3, and the second liquid outlet 151 and the first liquid inlet are arranged at the same end of the sheath tube 1; the third liquid outlet 152 is disposed on the outer wall of the second elastic material layer 14, and is located at one end of the second elastic material layer 14 near the second liquid outlet 151.

It can be understood that the shape of the second liquid outlet 151 and the shape of the third liquid outlet 152 may be a regular structure formed by straight lines, or may be an irregular structure formed by arcs and straight lines, which is not limited in this application.

Compared with the prior art, the ureteral guiding sheath provided by the application has the advantages that the sheath channel 11 is used for inserting or extracting ureteroscope, instrument and the like, so that the ureteroscope, instrument and the like enter the renal pelvis through the sheath channel 11 to carry out operations such as lithotripsy and the like; the plurality of perfusion channels 15 arranged on the second elastic material layer 14 are used for injecting water, freeing up spaces and channels of ureteroscopes, instruments and the like, avoiding frequent disassembly of the water injection during operation, prolonging operation time, improving operation efficiency and reducing pain of patients. The pouring channel 15 is provided with the plurality of third liquid outlets 152 and the second liquid outlets 151, water can be ejected from the second liquid outlets 151 along the extending direction of the pouring channel 15, water can be ejected through the plurality of third liquid outlets 152 on the side wall of the pouring channel 15, broken stone, impurities and the like around the sheath tube 1 are flushed, the visual field definition of the ureteroscope is improved by flushing at various angles, the broken stone clearing efficiency is improved, and the operation time is shortened.

In some embodiments, the sheath tube joint 3 is provided with a water inlet joint 31, a water outlet joint 33 and a first channel 32, the second liquid inlet is connected with the water inlet, and the water outlet joint 33 and the first channel 32 are respectively communicated with the first liquid outlet.

Specifically, the first liquid outlet is connected with the water outlet joint 33, the water outlet joint 33 is connected with a negative pressure device, the pressure of the sheath channel 11 is reduced by the negative pressure device, when the pressure in the sheath channel 11 is lower than the pressure in the renal pelvis, the water in the renal pelvis enters the sheath channel 11 through the first liquid inlet and flows out from the second liquid outlet 151 and the water outlet joint 33 in sequence. The first channel 32 communicates with the sheath channel 11 and a ureteroscope, instrument, etc. is inserted into the renal pelvis through the first channel 32, the sheath channel 11 in sequence.

In some embodiments, the angle between the third liquid outlet 152 and the extending direction of the sheath tube 1 is less than or equal to 90 °. The water is ejected from the third liquid outlet 152, so that broken stones, impurities and the like around the sheath tube 1 can be flushed at multiple angles, the visual field definition of the ureteroscope is effectively improved, and the operation efficiency is improved.

In a preferred embodiment, the angle between the third liquid outlet 152 and the extending direction of the sheath 1 is 30 °, 45 °, 60 °, 75 ° or 90 °.

In some embodiments, as shown in fig. 5 to 7, the orifice of the sheath 1 near the end of the second liquid outlet 151 is in a convex orifice structure, a concave orifice structure or a planar orifice structure.

The shapes of the pipe orifices with different structures increase the diversity of ureter guiding sheath patterns. Meanwhile, the angles of the second liquid outlet 151 and the extending direction of the sheath tube 1 are different in different tube orifice shapes, so that the angles of water emitted from the second liquid outlet 151 are different, and the guiding sheaths with different tube orifice shapes can be selected according to the operation requirement, so that the operation efficiency is improved. It should be noted that, the included angle between the second liquid outlet 151 and the extending direction of the sheath tube 1 may be 0 to 180 °.

In some embodiments, the support structure layer 13 includes a bendable section 4 and a straight section 5, the straight section 5 is connected between the bendable section 4 and the sheath tube joint 3, the bendable section 4 includes at least two mortise-tenon connectors 41, and each mortise-tenon connector 41 is sequentially inserted along the extending direction of the straight section 5; the bendable section 4 is used for bending relative to the straight section 5 axially through relative sliding between the mortise and tenon connectors 41 when being subjected to lateral force; the second liquid outlet 151, the first liquid inlet and the third liquid outlet 152 are arranged on the bendable section 4.

Specifically, the connection modes of the straight line section 5, the bendable section 4 and the sheath pipe joint 3 include, but are not limited to, one or more of integrally formed connection modes, bonding, welding, snap connection or threaded connection, etc., and it is understood that the connection modes can only achieve the effect of firmly connecting the straight line section 5, the bendable section 4 and the sheath pipe joint 3. The mortise and tenon connectors 41 are arranged in the supporting structure layer 13, and bending of the bendable section 4 in different directions relative to the axial direction of the straight section 5 can be achieved through relative sliding among the mortise and tenon connectors 41, so that stone fragments at different positions in the ureter guiding sheath are close to stone fragments in the renal pelvis, the discharge efficiency of the stone fragments in the renal pelvis is improved in cooperation with the perfusion channel 15, the situation that stone powder affects the visual field or is accumulated in the kidney to affect the operation efficiency is avoided, and the stone clearance is improved.

In some embodiments, the first elastomeric layer 12 is a polytetrafluoroethylene layer, the support structure layer 13 is a stainless steel braid, and the second elastomeric layer 14 is a nylon layer. The first elastic material layer 12 and the second elastic material layer 14 are both elastic materials, so that the ureter sheath tube 1 can be bent, the mortise and tenon connectors 41 are arranged in the middle supporting structure layer 13, and bending of the bendable section 4 in different directions relative to the axial direction of the straight section 5 can be realized through relative sliding between the mortise and tenon connectors 41.

In a preferred embodiment, the outer surface of the second elastomeric layer 14 is provided with a lubricious coating to facilitate smoother access when the introducer sheath is itself placed into the ureter. The first elastic material layer 12 is provided with a lubrication layer near one side of the sheath channel 11 for smoother access when the ureteroscope or instrument is placed in the guiding sheath.

The support structure layer 13 is provided with the mortise and tenon joint 41, and the second elastic material layer 14 is coated on the outer surface of the support structure layer 13 and is used for limiting the mortise and tenon joint 41 to be bound and not separated from each other when the mortise and tenon joint 41 moves radially on the bendable section 4.

It should be noted that, in the ureteral guiding sheath provided in the present application, the bendable section 4 has three embodiments that can be bent, that is, the mortise and tenon joint 41 has three different structures. In the first embodiment, as shown in fig. 8 to 9, the mortise and tenon joint 41 includes a first body 411, at least two first plugging portions 412 and at least two second plugging portions 414, and the first plugging portions 412 and the second plugging portions are symmetrically connected to opposite sides of the first body 411; a first insertion chute 413 for inserting and relatively sliding the second insertion portion 414 of the adjacent mortise and tenon insertion piece 41 is formed between the two first insertion portions 412; a second insertion chute 415 for allowing the first insertion portion 412 of the adjacent mortise and tenon joint 41 to be inserted and slide relatively is formed between the two second insertion portions 414. It is to be understood that the first body 411 may have a ring structure, a sheet structure or other shapes, which is not limited in this application; preferably, the first body 411 is of annular configuration. The first plugging portions 412 and the second plugging sliding grooves 415 are plugged and can slide in the second plugging sliding grooves 415, and the second plugging portions 414 and the first plugging sliding grooves 413 are plugged and can slide in the first plugging sliding grooves 413, so that bending actions of the bendable sections 4 in different directions are realized between the mortise and tenon joint connectors 41.

In the first embodiment, the first plug portion 412 includes a first plug 4121 and a first connection section 4122 connected between the first body 411 and the first plug 4121; the second plug portion 414 includes a second plug 4141 and a second connection section 4142 connected before the first body 411 and the second plug 4141. The first plug sliding groove 413 is provided with a first limiting opening 4131 through which the second connecting section 4142 passes, and the second plug sliding groove 415 is provided with a second limiting opening 4151 through which the first connecting section 4122 passes. In the direction perpendicular to the axial direction of the bending section 4 which is not bent, the maximum width of the first plug 4121 is larger than the width of the second limiting opening 4151, when the bending section 4 is bent, the first plug 4121 slides relatively along the second inserting sliding groove 415, and the second limiting opening 4151 plays a limiting role to prevent the first inserting portion 412 from being separated from the second inserting sliding groove 415. In the direction perpendicular to the axial direction of the bending section 4 which is not bent, the maximum width of the second plug 4141 is larger than the width of the first limiting opening 4131, when the bending section 4 is bent, the second plug 4141 slides relatively along the first inserting sliding groove 413, and the first limiting opening 4131 plays a limiting role to prevent the second inserting portion 414 from being separated from the first inserting sliding groove 413.

In the first embodiment, the end of the first plug 4121 away from the first body 411 is provided with a first arc surface 4123, the end of the second plug 4141 away from the first body 411 is provided with a second arc surface 4143, the end of the second plug sliding groove 415 close to the first body 411 is provided with a second arc groove 4152 matched with the first arc surface 4123, the end of the first plug sliding groove 413 close to the first body 411 is provided with a first arc groove 4132 matched with the second arc surface 4143, a second limiting opening 4151 is formed between the two second plugs 4141, the first plug 4121 can rotate in the first plug sliding groove 413, a first limiting opening 4131 is formed between the two first plugs 4121, and the second plug 4141 can rotate in the first plug sliding groove 413.

In the first embodiment, by arranging at least two annular mortise and tenon joint members 41 which are mutually inserted, and the mortise and tenon joint members 41 are of semicircular concave-convex combined mortise and tenon structures, the effect of multidirectional bending of the bendable section 4 is achieved, and the pipe orifice of the sheath pipe 1 is convenient to approach towards the direction of stones in the renal pelvis.

The second embodiment differs from the first embodiment in the structure of the mortise plug 41. In a second embodiment, as shown in fig. 10 to 11, the mortise plug connector 41 includes a second body 416, a first rotating groove 4161 provided on a first side of the second body 416, a first stopper 4162 connected on a second side of the second body 416, and a first rotating block 4163 connected on a second side of the first stopper 4162; the first rotating groove 4161 is provided with a first opening 41611 for passing through a first block 4162 of an adjacent mortise plug 41, and the first rotating groove 4161 is used for accommodating a first rotating block 4163 of an adjacent mortise plug 41; the maximum width of the first rotating block 4163 is larger than the width of the first opening 41611, so that the first rotating block 4163 is prevented from being embedded into the first rotating groove 4161 to rotate without being separated; when the bendable section 4 is bent, the first rotating block 4163 rotates relative to the first rotating groove 4161, and when the first rotating blocks 4163 of the adjacent two mortise plug connectors 41 are abutted by the edges of the first openings 41611, the adjacent two mortise plug connectors 41 stop rotating. The first block 4162 is used for limiting the rotation angle between the two mortise plug members 41.

In the second embodiment, as shown in fig. 11, the mortise plug connector 41 further includes a second block 4164 connected to the inner sidewall of the first rotation groove 4161, and a second rotation block connected to the first side of the second block 4164 and located in the first rotation groove 4161; the first rotating block 4163 is provided with a second rotating groove 4166, and the second rotating groove 4166 is provided with a second opening 41661 which is arranged away from the first opening 41611 and is used for allowing the second stop block 4164 of the adjacent mortise and tenon joint 41 to pass through; the second rotating groove 4166 is used for accommodating the second rotating block 4165 of the adjacent mortise and tenon joint 41, and the maximum width of the second rotating block 4165 is larger than the width of the second opening 41661, so that the second rotating block 4165 is embedded in the second rotating groove 4166 and does not disengage. When the bendable section 4 is bent, the first rotating block 4163 rotates relative to the first rotating groove 4161, and the second rotating block 4165 rotates relative to the second rotating groove 4166, and when the first rotating block 4163 of the adjacent two mortise plug pieces 41 abuts against the edge of the first opening 41611 or the second rotating block 4165 abuts against the edge of the second opening 41661, the adjacent two mortise plug pieces 41 stop rotating. The second block 4164 is used to limit the rotation angle between the two mortise plug 41.

In the preferred embodiment, the first rotating groove 4161 and the second rotating groove 4166 are arc-shaped in cross section, the first rotating block 4163 is adapted to the cross section of the first rotating groove 4161, and the second rotating block 4165 is adapted to the cross section of the second rotating groove 4166, so that the first rotating block 4163 can rotate in the second rotating groove 4166 at the same time as the first rotating groove 4161 rotates.

In the second embodiment, the mortise and tenon joint 41 further includes a third block 4169 connected to the inner wall of the second rotating groove 4166, and a third rotating block 4168 connected to the third block 4169 and located in the second rotating groove 4166, the second rotating block 4165 is provided with a third rotating groove 4167, the third rotating groove 4167 is provided with a third opening 41671 for passing through the third block 4169 of the adjacent mortise and tenon joint 41, the third rotating groove 4167 is used for accommodating the third rotating block 4168 of the adjacent mortise and tenon joint 41, and the width of the third rotating block 4168 is larger than the width of the third opening 41671, so that the third rotating block 4168 is embedded in the third rotating groove 4167 to rotate without disengaging. When the bendable section 4 is bent, the first rotating block 4163 rotates relative to the first rotating groove 4161, the second rotating block 4165 rotates relative to the second rotating groove 4166, and the third rotating block 4168 rotates relative to the third rotating groove 4167; the first rotation block 4163 of the adjacent two mortise plug members 41 abuts against the edge of the first opening 41611, the second rotation block 4165 abuts against the edge of the second opening 41661, or the third rotation block 4168 abuts against the edge of the third opening 41671, and the adjacent two mortise plug members 41 stop rotating. The third block 4169 is used to limit the rotation angle between the two mortise plug 41.

In a preferred embodiment, the third rotating groove 4167 is also circular in cross-section and the third rotating block 4168 is shaped to match the shape of the third rotating groove 4167 such that when the first rotating block 4163 rotates within the first rotating groove 4161 and the second rotating block 4165 rotates relative to each other within the second rotating groove 4166, the third rotating block 4168 also rotates relative to each other within the third rotating groove 4167.

In the second embodiment, the third opening 41671 is disposed at a predetermined angle from the opening direction of the second opening 41661, and the predetermined angle is 0 to 180 °. Preferably, the predetermined angle is 90 °.

On the basis of the second embodiment, a third embodiment is formed by adding a buckle and a clamping groove, as shown in fig. 12-13, the mortise and tenon joint connector 41 further comprises a first clamping groove 419 and a second clamping groove 420 which are respectively arranged on two opposite sides of the second block 4164, and two opposite sides of the second opening 41661 are respectively provided with a first buckle 417 matched with the first clamping groove 419 and a second buckle 418 matched with the second clamping groove 420. When the bendable section 4 is bent, the first rotating block 4163 rotates relative to the first rotating groove 4161, and the second rotating block 4165 rotates relative to the second rotating groove 4166; when the second stoppers 4164 of two adjacent mortise plug connectors 41 abut against the edges of the second opening 41661, the two adjacent mortise plug connectors 41 stop rotating; when the first fastener 417 is engaged with the first slot 419 or the second fastener 418 is engaged with the second slot 420, the relative rotation position between the two adjacent mortise and tenon connectors 41 is fixed.

Specifically, when the first block 4162 rotates relative to the first rotating groove 4161 and the second block 4164 rotates relative to the second rotating groove 4166 to bend the bendable section 4 to a preset angle, the bendable section 4 is fixed to a preset bending angle state by the clamping of the first clamping groove 419 and the first clamp 417 and the clamping of the second clamping groove 420 and the second clamp 418. After the ureteroscope in the sheath channel 11 is withdrawn, the bendable section 4 can still keep the original preset bending angle state, so that the next negative pressure lithotripsy suction operation is convenient. If the locking state is required to be released, the ureteroscope is reversely bent to drive the bendable section 4 to react and bend, the clamping groove and the clamping buckle are released, and the bendable section 4 can be released from the locking state.

It should be noted that, the first catch 417 and the second catch 418 may be made of a hard material and/or a soft material, and the first catch 419 and the second catch 420 may also be made of a soft material and/or a hard material, so long as the effect that the first catch 417 and the first catch 419 are embedded into each other and separated from each other under a certain force, and the second catch 418 and the second catch 420 are embedded into each other and separated from each other under a certain force can be achieved. Preferably, the first catch 417 and the second catch 418 are soft materials, and the second catch 420 and the first catch 419 are hard materials. It should be noted that, the first clamping groove 419, the second clamping groove 420, and the first buckle 417 and the second buckle 418 corresponding thereto may be respectively disposed on the abutting surfaces of the two adjacent mortise plug connectors 41, as long as 9 can be fixed at a predetermined rotation position when the two mortise plug connectors 41 rotate relatively.

As shown in fig. 1, a second aspect of the present application provides an introducer device comprising a dilator 2 and the ureteral introducer sheath described above, the dilator 2 being connected to the sheath 1 through a sheath connector 3. Specifically, the dilator 2 is sequentially passed through the first passage 32 of the sheath connector 3 and the sheath passage 11 of the sheath 1, and is protruded from the protruding port of the dilator 2.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The ureter guiding sheath is characterized by comprising a sheath tube and a sheath tube joint, wherein the sheath tube comprises a sheath tube channel, a first elastic material layer, a supporting structure layer and a second elastic material layer which are sequentially arranged from inside to outside, the first elastic material layer forms the outer wall of the sheath tube channel, the sheath tube channel comprises a first liquid inlet and a first liquid outlet, and the first liquid outlet is connected with the sheath tube joint; a plurality of pouring channels are arranged in the second elastic material layer, each pouring channel comprises a second liquid inlet, a second liquid outlet and a third liquid outlet, the second liquid inlets and the second liquid outlets are respectively arranged at two ends of each pouring channel, the second liquid inlets are communicated with the sheath pipe joints, and the second liquid outlets and the first liquid inlets are arranged at the same end of the sheath pipe; the third liquid outlet is formed in the outer wall of the second elastic material layer and is located at one end, close to the second liquid outlet, of the second elastic material layer.

2. The ureteral introducer sheath according to claim 1, characterized in that the third liquid outlet has an angle with the direction of extension of the sheath of less than or equal to 90 °.

3. The ureteral introducer sheath according to claim 1, characterized in that the sheath tube joint is provided with a water inlet joint, a water outlet joint and a first channel, the second liquid inlet is connected with the water inlet joint, and the water outlet joint and the first channel are respectively communicated with the first liquid outlet.

4. The ureteral introducer sheath of claim 1, wherein the orifice of the sheath proximate the second outlet has a convex orifice configuration, a concave orifice configuration, or a planar orifice configuration.

5. The ureteral introducer sheath according to claim 1, characterized in that the support structure layer comprises a bendable section and a straight section, the straight section being connected between the bendable section and the sheath joint, the bendable section comprising at least two mortise-tenon connectors, each mortise-tenon connector being inserted in sequence along the extension direction of the straight section; the bendable section is used for bending relative to the straight line section through relative sliding among the mortise and tenon joint connectors when the bendable section receives lateral force;

the second liquid outlet, the first liquid inlet and the third liquid outlet are arranged on the bendable section.

6. The ureteral guide sheath according to claim 5, characterized in that the mortise and tenon joint comprises a first body, at least two first joint parts and at least two second joint parts, the first joint parts and the second joint parts being symmetrically connected on opposite sides of the first body; a first plug-in chute for allowing the second plug-in part of the adjacent mortise and tenon plug-in piece to be inserted and relatively slide is formed between the two first plug-in parts; and a second plug-in chute for allowing the first plug-in parts of the adjacent mortise and tenon plug-in parts to be inserted and relatively slide is formed between the two second plug-in parts.

7. The ureteral guide sheath of claim 5, wherein the mortise and tenon joint comprises a second body, a first rotating groove provided on a first side of the second body, a first stop connected on a second side of the second body, and a first rotating block connected on a second side of the first stop; the first rotating groove is provided with a first opening for the first stop block of the adjacent mortise and tenon joint to pass through, and is used for accommodating the first rotating block of the adjacent mortise and tenon joint; the maximum width of the first rotating block is larger than the width of the first opening; when the bendable section is bent, the first rotating block and the first rotating groove rotate relatively, and when the first rotating blocks of the two adjacent mortise-tenon connectors are abutted by the edges of the first opening, the two adjacent mortise-tenon connectors stop rotating.

8. The ureteral guide sheath of claim 7, wherein the mortise and tenon joint further comprises a second stop connected to an inner sidewall of the first rotation groove, and a second rotation block connected to a first side of the second stop and positioned in the first rotation groove; the first rotating block is provided with a second rotating groove, and the second rotating groove is provided with a second opening which is arranged away from the first opening and used for allowing a second stop block of an adjacent mortise and tenon joint to pass through; the second rotating groove is used for accommodating the second rotating block of the adjacent mortise and tenon joint; the maximum width of the second rotating block is larger than the width of the second opening; when the bendable section is bent, the first rotating block and the first rotating groove rotate relatively, the second rotating block and the second rotating groove rotate relatively, and when the first rotating block of two adjacent tenon-and-mortise connectors are abutted with the edge of the first opening or the second rotating block of two adjacent tenon-and-mortise connectors are abutted with the edge of the second opening, the two adjacent tenon-and-mortise connectors stop rotating.

9. The ureteral guide sheath according to claim 8, characterized in that the mortise and tenon joint further comprises a third stop connected to the inner side wall of the second rotation groove, and a third rotation block connected to the third stop and located in the second rotation groove; a third rotating groove is formed in the second rotating block, and a third opening for allowing a third stop block of the adjacent mortise-tenon joint to pass through is formed in the third rotating groove; the third rotating groove is used for accommodating the adjacent third rotating blocks of the mortise and tenon joint; the maximum width of the third rotating block is larger than the width of the third opening; when the bendable section is bent, the first rotating block and the first rotating groove rotate relatively, the second rotating block and the second rotating groove rotate relatively, the third rotating block and the third rotating groove rotate relatively, and when the first rotating block and the first opening of the adjacent two mortise and tenon joint pieces are in abutting joint, the second rotating block and the second opening are in abutting joint, or the third rotating block and the third opening are in abutting joint, the adjacent two mortise and tenon joint pieces stop rotating.

10. An introducer device comprising a dilator and a ureteral introducer sheath according to any of claims 1 to 9, the dilator being connected to the ureteral introducer sheath through the sheath connector.

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