CN208838088U

CN208838088U - Sustainable perfusion and the combined type Flexible ureteroscope sheath external member attracted

Info

Publication number: CN208838088U
Application number: CN201820858964.3U
Authority: CN
Inventors: 张建军
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-06-04
Filing date: 2018-06-04
Publication date: 2019-05-10
Anticipated expiration: 2028-06-04

Abstract

The utility model discloses a kind of sustainable combined type Flexible ureteroscope sheath external members for being perfused and attracting, it solves the problems, such as that clot and rubble can not effectively be discharged in kidney in Flexible ureteroscope lithotrity.The continuous irrigation system that its interior sheath and epitheca body are formed has the characteristics that high-efficient cleaning stone, improves one-stage operation success rate, the kidney stone of 2cm or more can be handled by making Flexible ureteroscope lithotrity also, expand operative indication.Its technical solution are as follows: including outer sheath, interior sheath Demountable combined-type is set in epitheca body, and the working end of interior sheath stretches out epitheca body running end and sets length；Negative pressure suction inlet is arranged in outer sheath non-operative end；Outer sheath and interior sheath are formed by the inside Continuous Perfusion of interior sheath and by the continuous irrigation system of outer sheath continuous negative pressure suction, and foreign body in art is completed.

Description

Sustainable perfusion and the combined type Flexible ureteroscope sheath external member attracted

Technical field

The utility model relates to the field of medical instrument technology, more particularly to a kind of sustainable combined type for being perfused and attracting Flexible ureteroscope sheath external member.

Background technique

Kidney stone (renal calculi) is some crystalline solids (such as calcium, oxalic acid, uric acid, cystine) and organic group Matter (such as matrix A, acidic mucopolysaccharide etc.) is common disease, the frequently-occurring disease of urinary system, 90% contains caused by the abnormal accumulation of kidney There is calcium, wherein calcinm oxalate calculus is most common.If kidney stone cannot be treated properly, it is easy to cause inflammation infection, serious person's meeting The even canceration of uronephrosis, uremia occurs；Multidigit can be discharged into ureter and bladder in renal plevis or kidney calices when kidney stone formation, defeated Ureteral calculi is almost entirely from kidney, therefore, if cannot be treated in time to kidney stone, can also cause the disease of other organs Become.

Currently, having for the therapeutic modality of kidney stone following several:

1. great quantity of water drinking carries out physics and arranges stone；This mode may be only available for size compared with microlith, but larger to kidney stone Person is invalid.

2. extracorporeal shock wave lithotripsy；This mode carries out rubble to kidney stone by the shock wave of extracorporeal lithotiptor, only suitable , matter soft person smaller for calculus, complication are mainly nephrorrhagia, infection.

3. conventional open operative treatment；This mode according to patient's kidney stone situation, kidney cut take stone or Part excision/full excision is carried out to kidney；This modus operandi wound is big, and remnant gallstone rate is high, and post-operative recovery is slower, it is also possible to can cause Multiple complications.

4. percutaneous nephrolithy takes stone；This mode, which needs to puncture punching from skin of lumbar region, establishes channel, direct to kidney portion calculus Rubble takes stone, is the main method of current processing 2cm or more calculus, and this method has made marked progress compared with conventional therapy, but This mode still makes human body generate wound, and the severe complications incidence such as nephrorrhagia, infectious shock is still higher.

5. minimal invasive operation；This mode mainly uses Flexible ureteroscope through per urethram entering ureter and renal plevis kidney In small cup, calculus is smashed by soft lens；This mode is attracted by single tube negative-pressure and rubble and broken is sucked out after smashing calculus Bits are the main methods for handling 2cm or less calculus.This mode handle it is ineffective when 2cm or more calculus, the reason for this is that: it is existing The mode that capable single tube negative-pressure attracts negative pressure straw when passing through negative pressure gravitational attraction rubble is easy blocking, when spending when attracting rubble Between it is long so that rubble and clot can not effectively be sucked out, and then influence surgical field of view, can not also find former calculus, have to terminate this Secondary operation, it cannot be guaranteed that the continuity of operation.If continual cure, second phase, three-stage operation even percutaneous nephrolithy can only be selected to take stone Art.

Application No. is 201510554185.5 Chinese patents to provide a kind of survey pressure suction that cooperation Flexible ureteroscope uses Draw clear stone device, uses Flexible ureteroscope+guide sheath, the operating mode attracted in rubble.Application No. is 201720057474.9 Chinese patent provide it is a kind of can built-in type calculus suction tube.

It turns out that it is high that the cross section of effective Continuous Perfusion and vacuum suction, vacuum suction row stone channel, which maximizes, Imitate the determinant of clear stone.And the above-mentioned prior art fails to provide effective solution.

Utility model content

In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a kind of sustainable combination for being perfused and attracting Formula Flexible ureteroscope sheath external member, outer sheath need to only be entered by human body natural's pipeline performs the operation, without opening in sufferer body Other operations such as hole can really realize non-invasive procedures, and its interior sheath and the continuous irrigation system of epitheca body formation can be carried out and hold Continuous perfusion attracts, and can effectively attract and clean out rubble in kidney, it is ensured that operation safety, improve one-stage operation success rate and Clear Shi Xiaoguo；

Further, the utility model adopts the following technical solutions:

The sustainable combined type Flexible ureteroscope sheath external member for being perfused and attracting, including outer sheath, interior sheath detachably combine Formula is set in epitheca body, and the working end of interior sheath stretches out epitheca body running end and sets length；The outer sheath inoperative End setting negative pressure suction inlet, outer sheath enter operation by human body natural's pipeline and realize non-invasive procedures；

The outer sheath and interior sheath are formed by the inside Continuous Perfusion of interior sheath and holding by outer sheath continuous negative pressure suction Continuous irrigation system, completes foreign body in art, guarantees that mirror downward view is clear.

The Flexible ureteroscope sheath external member of the utility model, outer sheath are entered in kidney by human body natural's pipeline, rock breaking tool And interior sheath is then operated all by entrance inside epitheca body, carries out other operations such as aperture therefore without in sufferer body, It can really realize non-invasive procedures, mitigate patient's pain；And the utility model outer sheath and interior sheath can form continuous irrigation system System, by interior sheath Continuous Perfusion and by outer sheath continuous negative pressure suction, can make the circulations such as liquid, can rapidly and efficiently will be broken Stone etc. attracts and goes out, and not will cause the blocking of suction tube, clear stone better effect.

The working end of interior sheath is arranged in the utility model to stretch out epitheca body running end setting length, setting can in this way To avoid flushing liquid by irrigation pump flow into after sheath directly in interior sheath working end flows to sheath and outer sheath it Between gap；Epitheca body running end is stretched out in interior sheath working end, so that flushing liquid meeting after via the outflow of interior sheath working end It first flows in kidney, in vacuum suction work, liquid can just be flowed out by interior sheath, epitheca body space, to extend flushing liquid Circulation path guarantees flushing effect.

Further, the interior sheath is hollow pipeline.

Further, when the interior sheath is set in epitheca body, interior sheath is tightly attached to side wall in epitheca body, negative pressure suction inlet It is set to outer sheath non-operative end side and is oppositely arranged with interior sheath.

Interior sheath is closely set in side wall in epitheca body, interior sheath during lavation is can avoid and occurs because of attraction Displacement, and then outer sheath and interior sheath gap is made to become smaller, influence the suction effect of calculus rubble；And it is tightly attached to and negative pressure suction inlet Opposite side wall both can guarantee that interior sheath and epitheca body space maximized, and will not stop the normal operating of vacuum suction.

Further, the section area ratio of the interior sheath outer tube diameter and caliber in epitheca body are as follows: 1:(2~8).At this , can be under the normal work for guaranteeing continuous irrigation system under ratio setting, the attraction channel between outer sheath and interior sheath is horizontal Section is maximum, and the efficiency of the suctions such as calculus, clot is also improved with regard to maximizing.

Preferably, the cross-sectional profile of the interior sheath is arc-shaped or oblate in crescent.

Interior sheath cross section is arranged to crescent, can be preferably adjacent to when entering inside epitheca body in outer sheath one Side, and the both ends of its interior sheath can be against on epitheca body sidewall；When diameter is roughly equal in sheath pipe outside diameter and epitheca body within outstanding, protect It has demonstrate,proved interior sheath and has been tightly attached to wall in epitheca body, effective vacuum suction aisle spare is maximized.

Further, the interior sheath includes the first arc tube wall and the second arc tube wall, the first arc tube wall and second Arc tube wall links into an integrated entity.

Further, the curvature of the first arc tube wall is greater than the curvature of the second arc tube wall.

Further, the junction of the first arc tube wall and the second arc tube wall, which is supported, is set to wall in epitheca body.

Further, the interior sheath non-operative end setting closing connector, closes connector for interior sheath and outer sheath Non-operative end connects and closes the gap of interior sheath and outer sheath non-operative end.

Further, the closing connector includes the sleeve part connecting with interior sheath, and through-hole, interior sheath is arranged in sleeve part It is fixedly connected across through-hole and with sleeve part；Described sleeve pipe part is sheathed on outer sheath non-operative end end.

Further, described sleeve pipe part is an integral structure with interior sheath；Described sleeve pipe part and outer sheath non-operative end end Portion is connected by screw threads for fastening；

The through-hole eccentric setting interior sheath when sleeve part, sleeve part and outer sheath are fastenedly connected is tightly attached in epitheca body Side wall, and interior sheath is opposite with negative pressure suction inlet.

It is finally fastenedly connected in closing connector in outer sheath, it is ensured that interior sheath is in opposite with negative pressure suction inlet Side internally sheath can also be tightly attached to side wall in epitheca body and play great role；Closing connector can also be simultaneously by epitheca body end portion Gap closing between interior sheath, guarantees that irrigation fluid is attracted by negative pressure suction inlet.

Further, the interior sheath setting single-pipeline or dual circuit, are set as when single-pipeline being perfusion channel；It is set as When dual circuit, a pipeline is perfusion channel, and another pipeline is measuring pressure passage.Measuring pressure passage is connect with extraneous measuring cell device can be into Row surveys pressure.

Further, the interior sheath non-operative end is connected to irrigation pump.

Further, the negative pressure suction inlet is connected to vacuum suction pump.

Compared with prior art, the utility model has the beneficial effects that

The Flexible ureteroscope sheath external member of the utility model, the outer sheath of setting are to be entered in kidney to carry out by human body natural's pipeline Operation can really realize non-invasive procedures, mitigate patient's pain, can make disease without carrying out other operations such as aperture in sufferer body People restores in a short time.

The Flexible ureteroscope sheath external member of the utility model, the sheath in the setting of Demountable combined-type in outer sheath；Epitheca Body is entered in kidney by human body natural's pipeline ureter, and the instrument for carrying out calculus rubble operation in kidney is entered by outer sheath pipeline, broken Surgical instrument exits after stone, and interior sheath is entered by outer sheath pipeline, and interior sheath and epitheca body form continuous irrigation system, By the inside Continuous Perfusion of interior sheath and by outer sheath continuous negative pressure suction, the circulations such as liquid can be made, it can be rapidly and efficiently complete The foreign bodies such as Cheng Shuzhong calculus and clot, and not will cause the blocking of suction tube, guarantee that mirror downward view is clear.

Epitheca body running end setting length is stretched out in the working end of interior sheath by the Flexible ureteroscope sheath external member of the utility model Degree can effectively avoid flushing liquid sheath directly in interior sheath working end flows to after flowing into interior sheath by irrigation pump Gap between outer sheath；Epitheca body running end is stretched out into interior sheath working end, so that flushing liquid is via interior sheath plumber It can first be flowed in kidney after making end outflow, in vacuum suction work, liquid can just be flowed out by interior sheath, epitheca body space, Ke Yijin One step extends the circulation path of flushing liquid, increases effective flushing area of flushing liquid, it is different to improve calculus in art, clot etc. The taking-up success rate of object.

Interior sheath is tightly attached to side wall in epitheca body and is arranged by the Flexible ureteroscope sheath external member of the utility model, can internal sheath Pipe plays certain position-limiting action, and then can avoid interior sheath during lavation takes object and be displaced because of negative pressure suction force, So that outer sheath and interior sheath gap is become smaller, influences the suction effect of calculus rubble；And interior sheath be tightly attached to it is opposite with negative pressure suction inlet Side wall, both can guarantee that interior sheath and epitheca body space maximized, the normal operating of vacuum suction will not be stopped.

Detailed description of the invention

The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.

Fig. 1 is the Flexible ureteroscope sheath external member schematic diagram of the utility model；

Fig. 2 is that the interior sheath of the preferred embodiment in the utility model and outer sheath cooperate sectional view；

Fig. 3 is the schematic diagram of outer sheath；

Fig. 4 is the schematic diagram of interior sheath；

In figure, 1 outer sheath, sheath in 2,3 negative pressure suction inlets, the working end of sheath, 5 first arc tube walls, 6 second arcs in 4 Shape tube wall, 7 closing connectors, 8 perfusion channels, 9 measuring pressure passages.

Specific embodiment

It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field The identical meanings of understanding.

It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.

As background technique is introduced, exist in the prior art in Flexible ureteroscope lithotrity in kidney clot and rubble without The problem of method is effectively discharged, in order to solve technical problem as above, present applicant proposes a kind of sustainable groups for being perfused and attracting Box-like Flexible ureteroscope sheath external member.

In a kind of typical embodiment of the application, as Figure 1-Figure 4, provides a kind of sustainable perfusion and attract Combined type Flexible ureteroscope sheath external member, including outer sheath 1, interior 2 Demountable combined-type of sheath be set in outer sheath 1, and The working end of interior sheath 2 stretches out outer 1 working end of sheath and sets length；Negative pressure suction inlet 3, outer sheath 1 is arranged in outer 1 non-operative end of sheath Operation is entered by human body natural's pipeline and realizes non-invasive procedures；The working end of outer sheath is to protrude into one end that kidney is operated, The other end is non-operative end, is also handheld terminal, and the definition of interior sheath working end is identical as epitheca body running end.

The external diameter of epitheca can be F12-14, internal diameter F10-12.Outer sheath about 0.5cm is stretched out in interior 2 working end of sheath.

Interior 2 non-operative end of sheath is connected to irrigation pump.Negative pressure suction inlet 3 is connected to vacuum suction pump.Irrigation fluid warp Irrigation pump is entered by interior sheath 2, flow out by gap between interior sheath 2 and outer sheath 1, outer sheath 1 and interior sheath 2 formation by The inside Continuous Perfusion of interior sheath 2 and by the continuous irrigation system of outer 1 continuous negative pressure suction of sheath, completes calculus, clot etc. in art Foreign body guarantees that mirror downward view is clear.The utility model is inhaled using side trimming, and the form of two-tube negative pressure carries out lavation attraction, Suction pipeline is less likely to occur to block, and the visual field is unclear in art or cleans out to can effectively attract when performing the operation compared with maximum size Rubble in kidney can guarantee the continuity of operation, operation can disposably be finished, without moving knife again；

It is greater than the calculus of 2cm for kidney interior diameter, the prior art can not use the master of this method of Flexible ureteroscope rubble It wants the reason is that rubble and clot are blended in kidney and cause surgical field of view unclear in kidney, the soft lens sheath external member of the utility model can be high The cleaning rubble and clot of effect can solve the unclear problem in the visual field in surgical procedure, and calculus of the diameter greater than 2cm can also be used Soft lens operation, can expand the indication of soft lens operation.

Outer sheath is entered in kidney by human body natural's pipeline ureter, carries out the instrument of calculus rubble operation in kidney by outer sheath Pipeline enter implement soft lens operation, such as hematocele blocks in kidney or need to clear up suction calculus when, surgical instrument exits, by interior sheath by Outer sheath pipeline enters, and interior sheath and epitheca body form continuous irrigation system, and it is soft that the outer sheath of interior sheath importing does not need ureter Mirror and other ancillary techniques, it is easy to operate, it is possible to reduce operating time.

The working end 4 of interior sheath is arranged to stretch out outer 1 working end of sheath setting length, setting can be to avoid flushing in this way Liquid is flowed into the gap after interior sheath directly in interior sheath working end flows between sheath and outer sheath by irrigation pump；It is interior Epitheca body running end is stretched out in sheath working end, so that flushing liquid can be flowed to first in kidney after via the outflow of interior sheath working end, In vacuum suction work, liquid can just be flowed out by interior sheath, epitheca body space, to extend flushing liquid circulation path, be protected Demonstrate,prove flushing effect.

Interior sheath 2 is hollow pipeline.

When interior sheath 2 is set in outer sheath 1, interior sheath 2 is tightly attached to outer 1 inner sidewall of sheath, and negative pressure suction inlet 3 is set to outer It 1 non-operative end side of sheath and is oppositely arranged with interior sheath 2 namely negative pressure suction inlet and interior sheath are relatively arranged on outer sheath two Side.Interior sheath is closely set in side wall in epitheca body, interior sheath during lavation is can avoid and is displaced because of attraction, And then outer sheath and interior sheath gap is made to become smaller, influence the suction effect of calculus rubble；And its be tightly attached to it is opposite with negative pressure suction inlet Side wall, both can guarantee that interior sheath and epitheca body space maximized, the normal operating of vacuum suction will not be stopped.And attract logical Road cross section size and the efficiency of clear stone and clot are positively correlated.

The section area ratio of caliber in interior 2 outer tube diameter of sheath and outer sheath 1 is arranged are as follows: 1:(2~8).

It turns out that the cross section of effective Continuous Perfusion and vacuum suction, vacuum suction row stone channel maximizes, it is high Imitate the determinant of clear stone；The application, can be under the normal work for guaranteeing continuous irrigation system, outside by the above ratio setting Attraction channel cross section between sheath and interior sheath is maximum, and the efficiency of the suctions such as calculus, clot is also improved with regard to maximizing.This The soft lens sheath external member of utility model makes Flexible ureteroscope that can handle bigger calculus with a phase, improves one-stage operation success rate, makes Quite a few calculus patient operation (such as percutaneous nephrolithotomy) bigger from second phase, three phases etc. has significant progress Meaning.

The cross-sectional shape of interior sheath can be the arbitrary shapes such as circle, as a kind of preferred embodiment party of the utility model Formula, as shown in Fig. 2, being that the cross-sectional profile of interior sheath 2 is arranged to crescent.

Interior sheath 2 includes the first arc tube wall 5 and the second arc tube wall 6, the first arc tube wall 5 and the second arc tube wall 6 It links into an integrated entity.The curvature of first arc tube wall 5 is greater than the curvature of the second arc tube wall 6.First arc tube wall 5 and the second arc The junction of tube wall 6, which is supported, is set to wall in epitheca body.

Interior sheath cross section is arranged to crescent, the maximum caliber of interior sheath is approximately equal to diameter in epitheca body, is entering It can preferably be adjacent to when inside epitheca body in outer sheath side, and the both ends of its interior sheath can be against on epitheca body sidewall；Especially with When diameter is roughly equal in interior sheath pipe outside diameter and epitheca body, it ensure that interior sheath is tightly attached to wall in epitheca body, effective vacuum suction is logical Road area is maximized.

The cross-sectional shape of interior sheath can also be arranged in the arc-shaped or oblate.At this point, closing connector and interior sheath The relative stiffness of tubing matter is the element that sheath is tightly attached to wall in epitheca body in guaranteeing.

Closing connector 7 is set in interior 2 non-operative end of sheath, closes connector 7 for 1 inoperative of interior sheath 2 and outer sheath End connects and closes the gap of 1 non-operative end of interior 2 non-operative end of sheath and outer sheath.

Closing connector includes sleeve part connect with interior sheath 2, and sleeve part is arranged through-hole, interior sheath 2 across through-hole and It is fixedly connected with sleeve part；Sleeve part is sheathed on outer 1 non-operative end end of sheath.

Sleeve part and interior sheath 2 are connected as one formula structure in the application.1 non-operative end end of sleeve part and outer sheath It can be connected by screw threads for fastening, namely external screw thread is set in outer 1 non-operative end end of sheath, internal screw thread, set is arranged in sleeve part Pipe fitting is placed on outer 1 non-operative end end of sheath and is connected through a screw thread with it；Through-hole eccentric setting is in sleeve part, sleeve part and outer Sheath 1 when being fastenedly connected interior sheath 2 be tightly attached to outer 1 inner sidewall of sheath, and interior sheath 2 and negative pressure suction inlet 3 are opposite.This guarantees Attraction channel cross section between outer sheath and interior sheath maximizes, and improves the efficiency of the foreign matters such as calculus, clot suction.

Single-pipeline or dual circuit can be set in sheath 2 in the utility model, is set as when single-pipeline being perfusion channel, carry out Irrigation；When being set as dual circuit, a pipeline is perfusion channel 8, and another pipeline is measuring pressure passage 9.Measuring pressure passage 9 and the external world The connection of measuring cell device can carry out survey pressure.When dual circuit is arranged, if measuring pressure passage is closed, closing can be used without surveying pressure The form of the structural traps such as block or other any forms that can be blocked in measuring pressure passage end；When needing to survey pressure, Plugging structure is taken out, keeps measuring pressure passage unimpeded, it is made to connect measuring cell device.It surveys pressure and belongs to general knowledge known in this field, Details are not described herein.

The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.

Claims

1. sustainable perfusion and the combined type Flexible ureteroscope sheath external member attracted, characterized in that including outer sheath, interior sheath is removable Unload it is knockdown be set in epitheca body, and interior sheath working end stretch out epitheca body running end set length；The outer sheath Negative pressure suction inlet is arranged in non-operative end；

The outer sheath and interior sheath are formed by the inside Continuous Perfusion of interior sheath and by the lasting filling of outer sheath continuous negative pressure suction System is washed, foreign body in art is completed.

2. Flexible ureteroscope sheath external member as described in claim 1, characterized in that the interior sheath is hollow pipeline；In described When sheath is set in epitheca body, interior sheath is tightly attached to side wall in epitheca body, and negative pressure suction inlet is set to outer sheath non-operative end side It portion and is oppositely arranged with interior sheath；

Further, the interior sheath non-operative end is connected to irrigation pump, and the negative pressure suction inlet is connected to vacuum suction pump.

3. Flexible ureteroscope sheath external member as described in claim 1, characterized in that pipe in the interior sheath outer tube diameter and epitheca body The section area ratio of diameter are as follows: 1:(2~8).

4. Flexible ureteroscope sheath external member as described in claim 1, characterized in that the cross-sectional profile of the interior sheath is in crescent moon Shape is arc-shaped or oblate.

5. Flexible ureteroscope sheath external member as described in claim 1 or 4, characterized in that the interior sheath includes the first curved pipe Wall and the second arc tube wall, the first arc tube wall and the second arc tube wall link into an integrated entity.

6. Flexible ureteroscope sheath external member as claimed in claim 5, characterized in that the curvature of the first arc tube wall is greater than the The curvature of two arc tube walls；The junction of the first arc tube wall and the second arc tube wall, which is supported, is set to wall in epitheca body.

7. Flexible ureteroscope sheath external member as described in claim 1, characterized in that the interior sheath non-operative end setting closing connects Interior sheath is connected with outer sheath non-operative end and seals the gap of interior sheath and outer sheath non-operative end by fitting, closing connector It closes.

8. Flexible ureteroscope sheath external member as claimed in claim 7, characterized in that the closing connector includes connecting with interior sheath Through-hole is arranged in the sleeve part connect, sleeve part, and interior sheath passes through through-hole and is fixedly connected with sleeve part；Described sleeve pipe part is sheathed on outer Sheath non-operative end end.

9. Flexible ureteroscope sheath external member as claimed in claim 8, characterized in that described sleeve pipe part is integral type knot with interior sheath Structure；Described sleeve pipe part is connected with outer sheath non-operative end end by screw threads for fastening；

The through-hole eccentric setting interior sheath when sleeve part, sleeve part and outer sheath are fastenedly connected is tightly attached to side in epitheca body Wall, and interior sheath is opposite with negative pressure suction inlet.

10. Flexible ureteroscope sheath external member as described in claim 1, characterized in that single-pipeline or two-tube is arranged in the interior sheath Road is set as when single-pipeline being perfusion channel；When being set as dual circuit, a pipeline is perfusion channel, and another pipeline is to survey pressure to lead to Road.