CN210784537U

CN210784537U - Ureter soft endoscope sheath external member with rotatable inner sheath pipe

Info

Publication number: CN210784537U
Application number: CN201921210473.9U
Authority: CN
Inventors: 张建军
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2020-06-19
Anticipated expiration: 2029-07-26

Abstract

The utility model discloses a flexible ureteroscope sheath assembly with a rotatable inner sheath tube, which comprises an outer sheath body, wherein a non-working end of the outer sheath body is provided with a reducing channel, the side part of the reducing channel is provided with a negative pressure suction port, the end part of the reducing channel is fixedly connected with a sleeve piece, the sleeve piece is connected with a rotary connector, the rotary connector can rotate for 360 degrees and is connected with the inner sheath tube, the inner sheath tube is arranged in the outer sheath body, the working end of the inner sheath tube extends out of the working end of the outer sheath body for setting the length, and the non-working end of the inner sheath tube is provided with a perfusion flushing port; and a water outlet is formed in the end part of the working end of the inner sheath tube or the side part of the working end. The inner sheath tube is connected with the outer sheath body through the rotary connector, the rotary connector can drive the inner sheath tube to synchronously rotate for 360 degrees, and when the inner sheath tube is filled inwards, variable and complex vortex can be formed in the kidney, so that the gravel can be sucked out quickly and effectively under negative pressure.

Description

Ureter soft endoscope sheath external member with rotatable inner sheath pipe

Technical Field

The utility model relates to the technical field of medical equipment, especially relate to a flexible mirror sheath external member of ureter with sheath pipe in rotatable.

Background

Renal calculus (renal calculi) is caused by abnormal accumulation of some crystalline substances (such as calcium, oxalic acid, uric acid, cystine and the like) and organic matrixes (such as matrix A, acidic mucopolysaccharide and the like) in the kidney, is a common disease and frequently encountered disease of the urinary system, and 90 percent of the renal calculus contains calcium, wherein calcium oxalate calculus is the most common. If kidney stones cannot be properly treated, inflammation infection is easy to cause, and serious patients can suffer hydronephrosis, uremia and even canceration; the kidney stones are mostly located in the renal pelvis or renal calyx when formed, and can be discharged into the ureter and the bladder, and almost all the ureter stones come from the kidney, so that if the kidney stones cannot be treated in time, the kidney stones can also cause the pathological changes of other organs.

Currently, there are several treatment modalities for kidney stones:

1. physically removing stones from a large amount of drinking water; this approach is only applicable to smaller stones, but not to larger ones.

2. Extracorporeal shock wave lithotripsy; the method crushes the kidney stones through the shock waves of the external stone crusher, is only suitable for patients with smaller and soft stones, and has the main complications of renal hemorrhage and infection.

3. Traditional open surgical treatment; in this way, according to the renal calculus condition of a patient, the kidney is incised to take stones or is partially/completely resected; this surgical procedure is traumatic, has a high rate of stone residue, is slow to recover after surgery, and may cause various complications.

4. Taking out stone through a percutaneous nephroscope; the method needs to puncture and punch a hole from the skin of the waist to establish a channel, directly rubs and extracts the kidney stones, is the main method for treating the stones with the length of more than 2cm at present, has obvious improvement compared with the traditional open surgery, but still causes wounds to the human body, and has high incidence rate of serious complications such as renal hemorrhage, infectious shock and the like.

5. Treating by minimally invasive surgery; the mode is mainly that a ureter soft lens enters the ureter and the renal pelvis through the urethra, and the soft lens breaks stones; after the calculus is crushed, the crushed calculus and debris are sucked out through a single tube under negative pressure, and the method is a main method for treating the calculus with the length of less than 2 cm. The method has poor effect when used for treating stones with the length of more than 2cm, and the reasons are as follows: the negative pressure suction pipe is easy to block when the existing single-pipe negative pressure suction way sucks the broken stone through negative pressure, the time spent when the broken stone is sucked is long, the broken stone and blood clots can not be effectively sucked out, the visual field of the operation is further influenced, the original calculus can not be found, the operation can only be stopped, and the continuity of the operation can not be ensured. If the treatment is continued, only the second-stage and third-stage operations, even percutaneous nephrolithotomy, can be selected.

The inventor finds that when the existing soft endoscope sheath carries out negative pressure suction on stone chippings after kidney stone (more than 2 cm) lithotripsy, the negative pressure suction pipe is easy to block, and the broken stones cannot be quickly and effectively sucked out due to the scattered broken stone positions, so that multiple-stage operations are needed, and the physical burden and the economic burden of a patient are undoubtedly increased.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a ureter soft endoscope sheath assembly with a rotatable inner sheath tube; the inner sheath tube is connected with the outer sheath body through the rotary connector, the rotary connector can drive the inner sheath tube to synchronously rotate for 360 degrees, and variable and complex vortex can be formed in the kidney when the inner sheath tube is filled inwards, so that the crushed stone can be sucked out quickly and effectively under negative pressure; when the rotatable inner sheath tube rotates for 360 degrees, the grinding and incarceration removing functions are realized on the detritus embedded in the outer sheath tube cavity, and the negative pressure suction effect is obviously improved.

Further, the utility model adopts the following technical scheme:

a ureteroscope sheath kit with a rotatable inner sheath tube comprises an outer sheath body, wherein the outer sheath body is used for realizing non-invasive surgery through natural human pipeline entering operation, a variable diameter channel is arranged at the non-working end of the outer sheath body, a negative pressure suction port is arranged at the side part of the variable diameter channel, the end part of the variable diameter channel is fixedly connected with a sleeve piece, the sleeve piece is connected with a rotary connector, the rotary connector can rotate by 360 degrees and is connected with the inner sheath tube, the inner sheath tube is arranged in the outer sheath body, the working end of the inner sheath tube extends out of the working end of the outer sheath body for a set length, the non-working end of the inner sheath tube is provided with a perfusion flushing port, the outer sheath body and the inner sheath tube form a continuous lavage system which is continuously perfused inwards by the inner sheath tube and continuously sucked by the continuous negative; and a water outlet is formed in the end part of the working end of the inner sheath tube or the side part of the working end.

This flexible ureteroscope sheath external member, internal sheath pipe pass through swivelling joint head, sleeve pipe spare and be connected with the outer sheath body completion, when going on clear stone, can drive the synchronous rotation of internal sheath pipe through rotating swivelling joint head, and then make the intraductal washing liquid of internal sheath form complicated vortex, and is better to the washing effect of rubble in the kidney, can rush out the rubble fast.

In the device, the side part of the inner sheath pipe is provided with the water outlet to form a side spraying type, the end part of the inner sheath pipe is provided with the water outlet to form a direct spraying type, and the two forms provide different intrarenal vortex effects due to the difference of water outlet angles; and the inner sheath tubes in the two forms can be alternately used, so that the stone cleaning effect is improved.

As a further technical scheme, the sleeve piece is fixedly connected with the end part of the variable diameter channel through threads; the sleeve piece is connected with the reducing channel in a sealing mode.

As a further technical scheme, the rotary connector is provided with a through hole, and the inner sheath tube passes through the through hole and is fixedly connected with the rotary connector; the through hole is eccentrically arranged on the rotary connector, and the inner sheath tube is tightly attached to the inner side wall of the outer sheath body when the rotary connector is connected with the sleeve piece.

The inner sheath tube is tightly attached to the inner side wall of the outer sheath body, so that the displacement of the inner sheath tube due to attraction in the lavage process can be avoided, and the gap between the outer sheath body and the inner sheath tube is reduced, thereby influencing the suction effect of the calculus and crushed stone.

As a further technical scheme, the inner sheath tube and the rotary connector are of an integrated structure.

As a further technical scheme, the sleeve piece is of a hollow structure, the rotary connector comprises a columnar structure, and the columnar structure extends into the sleeve piece.

The two sides of the middle part of the columnar structure are connected with connecting rods, the end parts of the connecting rods are connected with clamping rods, the connecting rods are perpendicular to the axis of the columnar structure, and the clamping rods are parallel to the axis of the columnar structure.

As a further technical scheme, the clamping rods are provided with clamping blocks towards the inner sides of the end parts of the casing pieces, annular clamping grooves are formed in the peripheries of the casing pieces, and when the rotary connector is connected with the casing pieces, the clamping blocks are clamped in the clamping grooves and the clamping blocks can rotate along the clamping grooves.

When the clamping device is used, one end of the clamping rod, which is not provided with the clamping block, is clamped, the end of the clamping rod, which is provided with the clamping block, is tilted, the rotary connector is moved to be matched with the casing piece, the clamping rod is loosened, and the clamping block of the clamping rod is clamped in the clamping groove, so that the rotary connector and the casing piece are fixed; when the gravel is washed, the rotary connector is rotated to drive the inner sheath tube to rotate, so that the washing liquid flowing out of the inner sheath tube forms vortex.

As a further technical scheme, the columnar structure, the connecting rod and the clamping rod are integrally formed.

As a further technical scheme, the negative pressure suction port is obliquely arranged.

As a further technical scheme, the outer sheath body and the inner sheath pipe are both hollow pipelines.

In a further aspect, when the inner sheath tube is disposed inside the outer sheath body, the inner sheath tube is closely attached to an inner wall of the outer sheath body.

As a further technical scheme, the perfusion flushing port is communicated with a perfusion flushing pump, and the negative pressure suction port is communicated with a negative pressure suction pump.

As a further technical scheme, the cross section of the inner sheath tube is in a crescent shape, an arc shape or an oblate shape.

As a further technical scheme, the inner sheath tube comprises a first tube wall and a second tube wall which are connected into a whole; the cross section of the first pipe wall is arc-shaped, and the cross section of the second pipe wall is linear, fold line-shaped or curved.

As a further technical scheme, the first tube wall is attached to the inner wall of the sheath body, and the joint of the first tube wall and the second tube wall is abutted to the inner wall of the sheath body.

As a further technical scheme, when the side part of the working end of the inner sheath tube is provided with the water outlet, the water outlet is arranged at the outer side part of the first tube wall.

As a further technical scheme, the inner sheath pipe is provided with a single pipeline or double pipelines, and is a perfusion channel when the inner sheath pipe is provided with the single pipeline; when the double-pipeline is set, one pipeline is a filling channel, and the other pipeline is a pressure measuring channel.

Compared with the prior art, the beneficial effects of the utility model are that:

this flexible ureteroscope sheath external member, with interior sheath pipe through swivelling joint head, sleeve pipe spare and outer sheath body be connected, when needing the washing stone, through rotating swivelling joint head and driving interior sheath pipe synchronous rotation, and then form complicated vortex after making the intraductal washing liquid of inner sheath flow out, it is better to the washing effect of rubble in the kidney, can attract rubbles etc. high-efficiently and go out, can not cause and attract the pipe to block up, guarantee that the field of vision under the mirror is clear.

This soft mirror sheath external member of ureter rotates swivelling joint head, and interior sheath pipe rotates in step thereupon, when washing rubble etc. in the kidney, can wash the calculus rubble of every position department in the kidney, has increased the washing area of washing liquid, has improved rubble clearance effect. And when the rotatable inner sheath pipe disclosed by the invention rotates for 360 degrees, the grinding and incarceration removing effects are realized on the detritus embedded in the outer sheath pipe cavity, and the negative pressure suction effect is obviously improved.

According to the ureteroscope sheath kit, the side part of the inner sheath tube is provided with the water outlet to form a side spraying type, the end part of the inner sheath tube is provided with the water outlet to form a direct spraying type, and different intrarenal vortex effects are provided due to the difference of water outlet angles in the two modes; and the inner sheath tubes in the two forms can be alternately used, so that the stone cleaning effect is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic view of a soft ureteroscope sheath assembly of the present disclosure;

FIG. 2 is a schematic view of an outer sheath;

FIG. 3 is a schematic view of a sleeve member;

FIG. 4 is a schematic view of the side-spraying inner sheath tube and the rotary connector;

FIG. 5 is a schematic view of a direct injection type inner sheath tube and a rotary connector;

FIG. 6 is a cross-sectional view of the inner sheath and outer sheath body in accordance with a preferred embodiment of the present disclosure;

FIG. 7 is a cross-sectional view of the inner sheath and the outer sheath with a second linear wall;

FIG. 8 is a cross-sectional view of the inner sheath with a second wall in the form of a dogleg in combination with the outer sheath;

FIG. 9 is a cross-sectional view of the inner sheath and the outer sheath with the second wall being curved;

FIG. 10 is a cross-sectional view of the inner sheath and outer sheath body of the present disclosure providing dual channels;

in the figure, 1 outer sheath body, 2 inner sheath pipe, 3 negative pressure suction port, 4 inner sheath pipe working end, 5 first pipe wall, 6 second pipe wall, 7 casing pipe parts, 8 perfusion channel, 9 pressure measurement channel, 10 reducing channel, 11 rotary connector, 12 water outlet, 13 columnar structure, 14 connecting rod, 15 clamping rod, 16 clamping block, 17 clamping groove.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

For convenience of description, the words "up", "down", "left" and "right" in this disclosure, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate description of the disclosure and simplify description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the disclosure.

The noun explains:

incarceration, a medical term, means seizure.

As described in the background art, the inventor finds that when the conventional flexible endoscope sheath performs negative pressure suction on stone chippings after renal calculus (more than 2 cm) lithotripsy, a negative pressure suction pipe is easy to block, and the crushed stones cannot be quickly and effectively sucked due to scattered crushed stone positions, so that multi-stage operations are required.

The application provides a ureteroscope sheath external member with sheath pipe in rotatable, including the sheath body, the sheath body is got into the operation by human natural duct and is realized not having the wound operation, and the non-working end of sheath body sets up the reducing passageway, the reducing passageway lateral part sets up negative pressure suction inlet, reducing passageway tip and casing spare fixed connection, the casing spare is connected with swivelling joint head, and swivelling joint head can 360 rotate, and swivelling joint head and internal sheath union coupling, internal sheath pipe set up in the sheath body and internal sheath pipe working end stretch out sheath body working end and set for length, internal sheath pipe non-working end sets up fills the washing mouth, and external sheath body and internal sheath pipe form by internal sheath pipe inwards continuously fill and by the continuous lavage system of the continuous negative pressure attraction of sheath body, accomplish foreign matter in the art and take out; and a water outlet is formed in the end part of the working end of the inner sheath tube or the side part of the working end.

The soft lens sheath assembly disclosed in this embodiment will be further described with reference to fig. 1 to 10;

as shown in fig. 1, the ureteral soft endoscope sheath assembly with the rotatable inner sheath tube comprises an outer sheath body 1, wherein the outer sheath body 1 enters the operation from a natural pipeline of a human body to realize a non-invasive operation, and the inner sheath tube 2 is detachably and combinatively arranged in the outer sheath body 1.

The non-working end of the outer sheath body 1 is provided with a reducing channel 10, the reducing channel is provided with a section of equal-diameter channel section from the end part of the non-working end of the outer sheath body to the working end direction and then is provided with a section of channel section with the pipe diameter gradually reduced, namely the size of the end part of the non-working end of the outer sheath body is larger than that of the end part of the working end.

The working end of the outer sheath body is the end which extends into the kidney for operation, the other end is a non-working end and a handheld end, and the definition of the working end of the inner sheath tube is the same as that of the working end of the outer sheath body.

The side part of the reducing channel 10 is provided with a negative pressure suction port 3, the negative pressure suction port 3 is obliquely arranged, the negative pressure suction port 3 is communicated with a negative pressure suction pump, the non-working end of the inner sheath tube 2 is provided with a perfusion flushing port, and the perfusion flushing port is communicated with a perfusion flushing pump; irrigation liquid gets into by interior sheath pipe 2 through filling the washer pump, by interior sheath pipe 2 and the outer sheath body 1 between the clearance flow, outer sheath body 1 and interior sheath pipe 2 form by interior sheath pipe 2 inwards continuously fill and by the continuous lavage system of the outer sheath body 1 continuous negative pressure attraction, calculus in the completion art, foreign matter such as clot take out, can make liquid etc. circulate, can be high-efficient attract such as rubble and go out, and can not cause the jam of attracting the pipe, the visual field is clear under the assurance mirror. This openly adopts the limit to wash the limit and inhales, and the lavage suction is carried out to the form of double-barrelled negative pressure, and the suction line is difficult to take place to block up, can effectively attract to clear up out the intrarenal rubble when the field of vision is unclear or operate to great calculus in the art, can guarantee the continuity of operation, can once only do the operation, and need not to move the sword once more.

For stones with the internal diameter of the kidney larger than 2cm, the main reason that the ureter soft lens calculus breaking method cannot be adopted in the prior art is that the stone and blood clots in the kidney are mixed to cause unclear visual field of the operation, the soft lens sheath component can efficiently clean the stone and the blood clots, can solve the problem of unclear visual field in the operation process, enables stones with the diameter larger than 2cm to be also subjected to soft lens operation, and can expand the indications of the soft lens operation.

The outer sheath body enters a kidney from a natural duct of a human body, instruments for carrying out intrarenal calculus and calculus crushing operations enter the outer sheath body through a duct to carry out soft lens operations, if an intrarenal blood clot happens or a calculus needs to be cleaned and sucked out, the surgical instruments exit, the inner sheath tube enters from the outer sheath body through the duct, the inner sheath tube and the outer sheath body form a continuous lavage system, the inner sheath tube is guided into the outer sheath body without a flexible ureteroscope and other auxiliary technologies, the operation is simple, and the operation time can be reduced. Therefore, other operations such as tapping on the body of a patient are not needed, noninvasive surgery can be really realized, the pain of the patient is relieved, and the patient can recover in a short time.

In the present disclosure, the working end 4 of the inner sheath tube is extended out of the working end of the outer sheath body 1 by a set length, the outer diameter of the outer sheath body can be F14-16, and the inner diameter is F12-14. The working end of the inner sheath tube 2 extends out of the outer sheath body by about 0.5 cm. The working end 4 of the inner sheath is set to extend out of the working end of the outer sheath 1 by a set length, so that the flushing liquid can be prevented from flowing into the inner sheath from the perfusion flushing pump and then directly flowing into a gap between the inner sheath and the outer sheath at the working end of the inner sheath; the working end of the inner sheath pipe extends out of the working end of the outer sheath body, so that the flushing liquid flows into the kidney after flowing out from the working end of the inner sheath pipe, and the liquid flows out from the gap between the inner sheath pipe and the outer sheath body when the negative pressure suction works, thereby prolonging the circulation path of the flushing liquid and ensuring the flushing effect.

Reducing passageway 10 tip and sleeve member 7 fixed connection,

sleeve member

7 and 10 tip accessible screw thread fastening connection of reducing passageway, also set up the external screw thread at sheath body reducing passageway 10 tip, sleeve member 7 sets up the internal thread, and the sleeve member overlaps in reducing passageway tip and passes through threaded connection rather than. The sleeve member 7 is connected with the reducing channel 10 in a sealing way, namely a sealing gasket is arranged between the inner part of the sleeve member 7 and the reducing channel 10. Casing spare 7 is connected with swivelling joint head 11, and swivelling joint head 11 can 360 rotations, and swivelling joint head 11 is connected with interior sheath pipe 2, when rotating the washing to rubble in the kidney, is favorable to washing the calculus rubble of every position in the kidney, improves rubble clearance effect.

When the negative pressure suction is carried out on the intrarenal calculus, the situation that the crushed stone is embedded between the inner sheath tube and the outer sheath body can occur, because the inner sheath tube can rotate for 360 degrees in the scheme disclosed by the invention, the matching part of the inner sheath tube and the outer sheath body has the functions of grinding and embedding removal on the crushed stone in the cavity of the outer sheath tube in the rotating process, and the negative pressure suction effect is obviously improved.

According to the soft endoscope sheath component, the inner sheath tube can rotate 360 degrees, when the intrarenal calculus is sucked in an lavage manner, the inner sheath tube can rotate to the negative pressure suction port of the outer sheath body, and the negative pressure suction port cannot be blocked by the inner sheath tube due to the arrangement of the reducing channel, so that the continuous and reliable suction of the calculus is guaranteed.

The rotary connector 11 is provided with a through hole, and the inner sheath tube 2 passes through the through hole and is fixedly connected with the rotary connector 11; the through hole is eccentrically arranged on the rotary connector 11, and the inner sheath tube 2 is tightly attached to the inner side wall of the outer sheath body 1 when the rotary connector 11 is connected with the sleeve member 7. Therefore, the cross section of the suction channel between the outer sheath body and the inner sheath tube is maximized, and the efficiency of sucking out foreign matters such as calculi, blood clots and the like is improved.

The inner sheath tube 2 and the rotary joint 11 are provided as an integral structure in this embodiment.

As shown in fig. 3, the sleeve member 7 is a hollow structure, and a circumferential slot 17 is arranged on the periphery of the sleeve member 7;

as shown in fig. 4, the rotary connector 11 includes a pillar structure 13, and the pillar structure 13 extends into the sleeve member 7; both sides all are connected with connecting rod 14 in the middle part of columnar structure 13, and connecting rod 14 tip is connected with supporting rod 15, and connecting rod 14 is perpendicular with columnar structure 13 axis, and supporting rod 15 is parallel with columnar structure 13 axis, and the clearance between two supporting rods 15 is roughly the same with casing spare external diameter.

The clamping rod 15 is provided with a clamping block 16 towards the inner side of the end part of the sleeve member 7, and when the rotary connector 11 is connected with the sleeve member 7, the clamping block 16 is clamped in the clamping groove 17 and the clamping block 16 can rotate along the clamping groove 17.

In this embodiment, the columnar structure 13, the connecting rod 14, and the clamping rod 15 are integrally formed.

When the device is used, one end of the clamping rod 15, which is not provided with the fixture block 16, is pinched, the end of the clamping rod 15, which is provided with the fixture block 16, is tilted, the rotary connector 11 is moved to be matched with the casing member 7, then the clamping rod 15 is loosened, the fixture block 16 of the clamping rod 15 is clamped in the clamping groove 17, and the fixing of the rotary connector 11 and the casing member 7 is completed; when the gravel is washed, the rotary connector 11 is rotated to drive the inner sheath tube 2 to rotate, so that the washing liquid flowing out of the inner sheath tube 2 forms vortex.

In one embodiment, as shown in fig. 4, the working end of the inner sheath 2 is closed, and the side of the working end 4 of the inner sheath is provided with a water outlet 12, so that a side-spraying type is formed;

in another embodiment, as shown in fig. 5, the inner sheath 2 is closed at the side, and the working end of the inner sheath 2 is provided with a water outlet to form a direct injection type, and the two forms provide different intrarenal vortex effects due to the difference of the water outlet angles;

when the flushing device is used specifically, the two forms of inner sheath tubes can be used alternately, namely one form of inner sheath tube is used for flushing, and the other form of inner sheath tube is used for flushing, so that the lithotriptic effect can be improved.

The soft endoscope sheath kit disclosed by the invention is characterized in that the inner sheath tube is filled with washing liquid, the negative pressure suction port arranged on the outer sheath body is used for negative pressure suction, the side part or the end part of the inner sheath tube is provided with the water outlet, the washing liquid flows into a kidney after flowing out from the working end of the inner sheath tube, and the liquid flows out from the gap between the inner sheath tube and the outer sheath body during the negative pressure suction work, so that the flow path of the washing liquid is further prolonged, the effective washing area of the washing liquid is increased, and the success rate of taking out foreign matters such as calculi, blood clots and the like during the operation is improved.

In the soft endoscope sheath component, the outer sheath body 1 and the inner sheath tube 2 are both hollow pipelines. When the inner sheath tube 2 is arranged in the outer sheath body 1, the inner sheath tube 2 is tightly attached to the inner side wall of the outer sheath body 1. The inner sheath tube is tightly attached to the inner side wall of the outer sheath body, so that the displacement of the inner sheath tube due to attraction in the lavage process can be avoided, and the gap between the outer sheath body and the inner sheath tube is reduced, thereby influencing the suction effect of the calculus and crushed stone.

The inner sheath tube 2 comprises a first tube wall 5 and a second tube wall 6, and the first tube wall 5 and the second tube wall 6 are connected into a whole. The cross section of the first pipe wall 5 is arc-shaped, and the cross section of the second pipe wall 6 is linear, as shown in fig. 7; or the cross section of the second tube wall 6 is a dogleg shape, as shown in fig. 8; or the cross section of the second pipe wall 6 is curved, and can be arranged into an arc shape, an oblate-like shape or an arc-like shape as shown in fig. 9; when the shape is a zigzag shape or a curved shape, the specific shape can be set as required. The cross sections of the first tube wall 5 and the second tube wall 6 are the sections along the radial direction of the inner sheath tube.

The first pipe wall 5 is attached to the inner wall of the outer sheath body 1, the joint of the first arc-shaped pipe wall 5 and the second arc-shaped pipe wall 6 supports against the inner wall of the outer sheath body 1, the outer side wall of the first pipe wall 5 is attached to the inner wall of the outer sheath body, the arc radius of the first pipe wall 5 is slightly smaller than the inner pipe diameter of the outer sheath body, the arc radius of the first pipe wall 5 is closer to the inner pipe diameter of the outer sheath body better, and therefore the whole inner sheath pipe is attached to the inner wall of the outer sheath body.

When the second duct wall 6 is also arranged in an arc, as shown in fig. 6, the curvature of the first duct wall 5 is larger than the curvature of the second duct wall 6.

When the side part of the working end of the inner sheath tube 2 is provided with the water outlet, the water outlet 12 of the inner sheath tube 2 is arranged at the outer side part of the first tube wall 5.

The cross-sectional shape of the inner sheath 2 may be any shape such as a circular shape, and as a preferred embodiment of the present invention, as shown in fig. 6, the cross-sectional shape of the inner sheath 2 is formed in a crescent shape.

The cross section of the inner sheath tube is arranged to be crescent, the maximum diameter of the inner sheath tube is approximately equal to the inner diameter of the outer sheath body, the inner sheath tube can be better attached to one side of the outer sheath body when entering the inner part of the outer sheath body, and two ends of the inner sheath tube can be abutted against the side wall of the outer sheath body; especially when the outer diameter of the inner sheath tube is approximately equal to the inner diameter of the outer sheath body, the inner sheath tube is ensured to be tightly attached to the inner wall of the outer sheath body, and the effective negative pressure suction channel area can be maximized.

The cross section of the inner sheath tube can also be in a circular arc shape or an oblate shape. In this case, the relative rigidity of the rotary joint and the inner sheath tube is a factor for ensuring the inner sheath tube to be closely attached to the inner wall of the outer sheath body.

The inner sheath tube 2 of the utility model can be provided with a single pipeline or a double pipeline, as shown in fig. 6, when the single pipeline is arranged, the single pipeline is used as a perfusion channel 8 for perfusion and flushing, and the cross section shape of the perfusion channel 8 is the same as that of the inner sheath tube 2, and can also be arranged in a crescent shape; as shown in fig. 10, when a double line is provided, one line is a filling channel 8 and the other line is a pressure channel 9. The pressure measuring channel 9 is connected with an external pressure measuring instrument to measure pressure. When the double pipelines are arranged, if pressure measurement is not needed, the pressure measurement channel is closed, and the closing can adopt a form that the end head of the pressure measurement channel is blocked by a block body and other structures or any other forms capable of blocking the end head of the pressure measurement channel; when pressure measurement is needed, the plugging structure is taken out, the pressure measurement channel is kept smooth, and the plugging structure is connected with a pressure measurement instrument. Manometry is well known in the art and will not be described further herein.

Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flexible ureteroscope sheath kit with a rotatable inner sheath tube is characterized by comprising an outer sheath body, wherein a non-working end of the outer sheath body is provided with a reducing channel, the side part of the reducing channel is provided with a negative pressure suction port, the end part of the reducing channel is fixedly connected with a sleeve piece, the sleeve piece is connected with a rotary connector, the rotary connector can rotate for 360 degrees and is connected with the inner sheath tube, the inner sheath tube is arranged in the outer sheath body, the working end of the inner sheath tube extends out of the working end of the outer sheath body for a set length, and the non-working end of the inner sheath tube is provided with a perfusion flushing port; and a water outlet is formed in the end part of the working end of the inner sheath tube or the side part of the working end.

2. The flexible ureteroscope sheath assembly with a rotatable inner sheath pipe as recited in claim 1, wherein the sleeve piece is fixedly connected with the end part of the variable diameter channel through threads; the sleeve piece is hermetically connected with the variable-diameter channel; the negative pressure suction port is obliquely arranged; the outer sheath body and the inner sheath pipe are both hollow pipelines.

3. The ureteroscope sheath assembly with a rotatable inner sheath tube of claim 1, wherein the rotary connector is provided with a through hole, and the inner sheath tube passes through the through hole and is fixedly connected with the rotary connector; the through hole is eccentrically arranged on the rotary connector, and the inner sheath tube is tightly attached to the inner side wall of the outer sheath body when the rotary connector is connected with the sleeve piece; interior sheath pipe and swivelling joint head formula structure as an organic whole.

4. The ureteral soft mirror sheath assembly with the rotatable inner sheath tube according to claim 1, wherein the sleeve member is a hollow structure, the rotary connector comprises a columnar structure, and the columnar structure extends into the sleeve member; the two sides of the middle part of the columnar structure are connected with connecting rods, the end parts of the connecting rods are connected with clamping rods, the connecting rods are perpendicular to the axis of the columnar structure, and the clamping rods are parallel to the axis of the columnar structure.

5. The flexible ureteroscope sheath assembly with a rotatable inner sheath according to claim 4, wherein the clamping rod is provided with a clamping block towards the inner side of the end part of the sleeve member, the periphery of the sleeve member is provided with a circumferential clamping groove, when the rotary connector is connected with the sleeve member, the clamping block is clamped in the clamping groove, and the clamping block can rotate along the clamping groove; the columnar structure, the connecting rod and the clamping rod are integrally formed.

6. The ureteral hoscope sheath assembly having a rotatable inner sheath of claim 1, wherein the inner sheath is configured to fit snugly against an inner sidewall of the outer sheath when the inner sheath is disposed within the outer sheath; the perfusion flushing port is communicated with a perfusion flushing pump, and the negative pressure suction port is communicated with a negative pressure suction pump.

7. The ureteral soft mirror sheath assembly with the rotatable inner sheath tube of claim 1, wherein the cross-sectional profile of the inner sheath tube is crescent-shaped, circular arc-shaped or oblate.

8. The ureteral hoscope sheath assembly having a rotatable inner sheath of claim 1, wherein the inner sheath comprises a first wall and a second wall, the first wall and the second wall being integrally connected; the cross section of the first pipe wall is arc-shaped, and the cross section of the second pipe wall is linear, fold line-shaped or curved.

9. The flexible ureteroscope sheath assembly with a rotatable inner sheath tube as recited in claim 8, wherein the first tube wall is attached to the inner wall of the outer sheath body, and the joint of the first tube wall and the second tube wall abuts against the inner wall of the outer sheath body; when the side part of the working end of the inner sheath pipe is provided with the water outlet, the water outlet is arranged at the outer side part of the first pipe wall.

10. The ureteroscope sheath assembly with a rotatable inner sheath according to claim 1, wherein the inner sheath is provided with a single pipeline or double pipelines, and is provided with a perfusion channel when being provided with the single pipeline; when the double-pipeline is set, one pipeline is a filling channel, and the other pipeline is a pressure measuring channel.