WO2021017413A1

WO2021017413A1 - Flexible ureteroscope sheath kit with rotatable inner sheath tube

Info

Publication number: WO2021017413A1
Application number: PCT/CN2020/070319
Authority: WO
Inventors: 张建军
Original assignee: 张建军
Priority date: 2019-07-26
Filing date: 2020-01-03
Publication date: 2021-02-04
Also published as: CN212490057U; CN111643154A; CN110251203A

Abstract

Disclosed is a flexible ureteroscope sheath kit with a rotatable inner sheath tube (2), the flexible ureteroscope sheath kit comprising an outer sheath body (1), wherein a non-working end of the outer sheath body (1) is provided with a diameter-variable channel (10), a side portion of the diameter-variable channel (10) is provided with a negative pressure suction port (3), an end portion of the diameter-variable channel (10) is fixedly connected to a sleeve member (7), the sleeve member (7) is connected to a rotating connector (11), the rotating connector (11) can rotate by 360°, the rotating connector (11) is connected to the inner sheath tube (2), the inner sheath tube (2) is arranged in the outer sheath body (1), a non-working end of the inner sheath tube (2) is provided with a filling and flushing port, and an end portion of a working end or a side portion of the working end of the inner sheath tube (2) is provided with a water outlet (12). The inner sheath tube (2) of the flexible ureteroscope sheath kit is connected to the outer sheath body (1) by means of the rotating connector (11), the rotating connector (11) can drive the inner sheath tube (2) to synchronously rotate by 360°, and a variable and complex eddy can be formed in a kidney when inward filling is performed by the inner sheath tube (2), such that broken stones can be rapidly and effectively sucked out by means of negative pressure.

Description

Soft ureter scope sheath kit with rotatable inner sheath

Technical field

The invention relates to the technical field of medical devices, in particular to a soft ureteroscope sheath kit with a rotatable inner sheath.

Background technique

Renal calculi are caused by the abnormal accumulation of some crystal substances (such as calcium, oxalic acid, uric acid, cystine, etc.) and organic substrates (such as matrix A, acid mucopolysaccharides, etc.) in the kidneys. It is a common disease of the urinary system. , Frequently-occurring, 90% contains calcium, of which calcium oxalate stones are the most common. If kidney stones cannot be properly treated, it is easy to cause inflammation and infection. In severe cases, hydronephrosis, uremia or even cancer may occur; kidney stones are mostly located in the renal pelvis or calyces, and can be discharged into the ureter and bladder. Almost all ureter stones come from the kidney Therefore, if the kidney stones cannot be treated in time, it can also cause other organ diseases.

Currently, there are the following treatments for kidney stones:

1. Drink a lot of water for physical stone removal; this method can only be used for smaller stones, but it is not effective for larger kidney stones.

2. Extracorporeal shock wave lithotripsy: This method uses the shock wave of an extracorporeal lithotripter to lithotripsy kidney stones. It is only suitable for people with small and soft stones. The main complications are renal hemorrhage and infection.

3. Traditional open surgical treatment; according to the patient's kidney stone condition, this method can cut and remove the kidney or perform partial/total resection of the kidney; this surgical method is traumatic, has a high residual stone rate and slow recovery after surgery , It may also cause a variety of complications.

4. Percutaneous nephroscope removal of stones; this method requires puncture and perforation from the skin of the waist to establish a channel, and direct lithotripsy and removal of stones in the kidney. It is currently the main method to deal with stones larger than 2 cm. This method is a significant improvement over traditional open surgery However, this method still causes wounds in the human body, and the incidence of serious complications such as renal hemorrhage and septic shock is still high.

5. Minimally invasive surgical treatment; this method mainly uses a flexible ureteroscope to enter the ureter and renal pelvis and calyx through the urethra, and the stone is crushed by the flexible microscope; after crushing the stone, this method is sucked by a single tube of negative pressure Aspirating gravel and debris is the main method to treat stones below 2cm. This method is not effective when treating stones larger than 2cm. The reason is that the current single-tube negative pressure suction method is easy to block when the crushed stone is sucked by negative pressure, and it takes a long time to attract the crushed stone. And the blood clot cannot be effectively sucked out, which affects the surgical field of vision, and the original stone cannot be found. The operation has to be terminated, and the continuity of the operation cannot be guaranteed. If you continue treatment, you can only choose two-stage, three-stage surgery or even percutaneous nephrolithotomy.

The inventor found that when the existing soft lens sheath is used for negative pressure suction of stone chips after renal calculus (above 2cm), the negative pressure suction tube is prone to blockage, and because the location of the stone is scattered, the stone cannot be quickly and effectively Aspiration requires multiple operations, which undoubtedly increases the patient's physical and economic burden.

Summary of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a flexible ureteroscope sheath kit with a rotatable inner sheath; the inner sheath is connected to the outer sheath through a rotating connector, and the rotating connector can drive the inner sheath 360° synchronous rotation, a variable and complex vortex can be formed in the kidney when the inner sheath is infused, which is conducive to fast and effective negative pressure suction out of the gravel; when the rotatable inner sheath is rotated in 360°, It has the effect of grinding and releasing the incarceration of debris incarcerated in the lumen of the outer sheath, and the suction effect of negative pressure is obviously improved.

Further, the present invention adopts the following technical solutions:

A flexible ureteroscope sheath kit with a rotatable inner sheath, comprising an outer sheath body, the outer sheath body is entered from the natural pipeline of the human body for non-invasive surgery, and the non-working end of the outer sheath body is provided with a diameter-reducing channel. The side part is provided with a negative pressure suction port, the end of the reducing channel is fixedly connected with the sleeve member, the sleeve member is connected with the rotating connector, the rotating connector can rotate 360°, the rotating connector is connected with the inner sheath tube, and the inner sheath tube is arranged at In the outer sheath and the working end of the inner sheath extends beyond the working end of the outer sheath for a set length, the non-working end of the inner sheath is provided with a perfusion flushing port, and the outer sheath and the inner sheath form a continuous perfusion from the inner sheath inward and A continuous lavage system with continuous negative pressure suction of the outer sheath completes the removal of foreign bodies during the operation; the working end of the inner sheath or the side of the working end is provided with a water outlet.

In the flexible ureteral sheath kit of the present disclosure, the inner sheath tube is connected to the outer sheath body through a rotating connector and a sleeve part. During stone cleaning, the rotating connector can drive the inner sheath to rotate synchronously, thereby making the inner sheath The washing liquid forms a complex vortex, which has a better washing effect on the gravel in the kidney and can quickly flush out the gravel.

In the present disclosure, a water outlet is provided at the side of the inner sheath tube to form a side spray type, and a water outlet at the end of the inner sheath tube is provided to form a direct spray type. The two forms provide different intrarenal vortex effects due to the difference in water outlet angle; and The two types of inner sheath can be used interchangeably to improve the stone cleaning effect.

As a further technical solution, the sleeve member is tightly connected with the end of the reducing channel through threads; and the sleeve member and the reducing channel are hermetically connected.

As a further technical solution, the rotary connector is provided with a through hole, and the inner sheath tube passes through the through hole and is fixedly connected to the rotary connector; the through hole is eccentrically arranged on the rotary connector, and the rotary connector is connected to the sleeve member. The sheath tube is closely attached to the inner wall of the outer sheath.

Set the inner sheath closely to the inner wall of the outer sheath to avoid the displacement of the inner sheath due to the attractive force during the lavage process, thereby reducing the gap between the outer sheath and the inner sheath, which affects the stone Suction effect.

As a further technical solution, the inner sheath tube and the rotating connector are an integral structure.

As a further technical solution, the sleeve member has a hollow structure, and the rotary joint includes a columnar structure, and the columnar structure extends into the sleeve member.

Both sides of the middle of the columnar structure are connected with connecting rods, the ends of the connecting rods are connected with the 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 solution, the clamping rod is provided with a clamping block toward the inner side of the end of the sleeve member, and a circumferential clamping groove is provided on the outer periphery of the sleeve member. When the rotating connector is connected with the sleeve member, the clamping block is clamped in the clamping groove And the card block can rotate along the card slot.

When in use, pinch the end of the clamping rod where the clamping block is not set, then the end of the clamping rod with the clamping block will be tilted, move the rotating connector to match the sleeve part, loosen the clamping rod, and the clamp of the clamping rod The block is clamped in the slot to complete the fixation of the rotating connector and the sleeve part; when washing the rubble, the rotating connector drives the inner sheath to rotate, so that the flushing liquid flowing out of the inner sheath forms a vortex.

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

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

As a further technical solution, both the outer sheath body and the inner sheath tube are hollow tubes.

As a further technical solution, when the inner sheath tube is arranged in the outer sheath body, the inner sheath tube is closely attached to the inner wall of the outer sheath body.

As a further technical solution, the perfusion flushing port is in communication with a perfusion flushing pump, and the negative pressure suction port is in communication with a negative pressure suction pump.

As a further technical solution, the cross-sectional shape of the inner sheath tube is crescent-shaped or arc-shaped or oblate.

As a further technical solution, the inner sheath tube includes a first tube wall and a second tube wall, the first tube wall and the second tube wall are connected into one body; the cross section of the first tube wall is arc-shaped, and the second tube wall The cross section of the tube wall is straight, broken or curved.

As a further technical solution, the first tube wall is attached to the inner wall of the outer sheath, and the junction of the first tube wall and the second tube wall abuts against the inner wall of the outer sheath, and the outer diameter of the first tube wall is about It is equal to the inner tube diameter of the outer sheath, so that when the inner sheath rotates 360° in the outer sheath body cavity, the outer side wall of the first tube wall is always close to the inner wall of the outer sheath.

As a further technical solution, when the water outlet is provided on the side of the working end of the inner sheath, the water outlet is provided on the outer side of the first tube wall.

As a further technical solution, the inner sheath is provided with a single tube or a double tube, and when it is set as a single tube, it is a perfusion channel; when it is set as a double tube, one tube is the perfusion channel, and the other tube is the measuring channel.压 Channel.

Compared with the prior art, the beneficial effects of the present invention are:

The flexible ureteral sheath kit of the present disclosure connects the inner sheath to the outer sheath through a rotating connector and a sleeve part. When it is necessary to wash and clear the stone, the rotating connector drives the inner sheath to rotate synchronously, thereby making the inner sheath After the flushing liquid flows out, a complex vortex is formed, which has a better flushing effect on the gravel in the kidney, and can quickly and efficiently suck the gravel out, without causing blockage of the suction tube, ensuring a clear vision under the microscope.

In the flexible ureteroscope sheath kit of the present disclosure, the rotating connector is rotated, and the inner sheath tube rotates synchronously. When the kidney stones are washed, the stones and stones at every position in the kidney can be washed, which increases the washing The washing area of liquid improves the cleaning effect of gravel. In addition, when the rotatable inner sheath tube of the present disclosure is rotated through 360°, it can grind and release the debris incarcerated in the lumen of the outer sheath body, and the negative pressure suction effect is significantly improved.

In the flexible ureteroscope sheath kit of the present disclosure, a water outlet is provided on the side of the inner sheath tube to form a side spray type, and a water outlet is provided at the end of the inner sheath tube to form a direct spray type. Due to the difference in water outlet angles, the two forms provide different The effect of vortex flow in the kidney; and the two types of inner sheath can be used alternately to improve the stone removal effect.

Description of the drawings

The drawings of the specification forming a part of the application are used to provide a further understanding of the application, and the exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application.

Figure 1 is a schematic diagram of a flexible ureteral sheath set of the present disclosure;

Figure 2 is a schematic diagram of the outer sheath body;

Figure 3 is a schematic diagram of the sleeve member;

Figure 4 is a schematic diagram of the fit between the side spray type inner sheath and the rotating connector;

Figure 5 is a schematic diagram of the coordination between the direct injection type inner sheath and the rotating connector;

Figure 6 is a cross-sectional view of the inner sheath and the outer sheath of the preferred embodiment of the present disclosure;

Figure 7 is a cross-sectional view of the inner sheath tube and the outer sheath body with a linear second tube wall;

Figure 8 is a cross-sectional view of the inner sheath tube and the outer sheath body with the second tube wall in a broken line shape;

9 is a cross-sectional view of the inner sheath tube and the outer sheath body with a curved second tube wall;

Figure 10 is a cross-sectional view of the inner sheath and outer sheath of the present disclosure with a dual channel;

In the figure, 1 outer sheath, 2 inner sheath, 3 negative pressure suction port, 4 working end of inner sheath, 5 first tube wall, 6 second tube wall, 7 sleeve parts, 8 perfusion channel, 9 pressure measurement channel , 10 variable diameter channel, 11 rotating connector, 12 water outlet, 13 columnar structure, 14 connecting rod, 15 clamping rod, 16 clamping block, 17 clamping slot.

Detailed ways

It should be pointed out that the following detailed descriptions are all illustrative and are intended to provide further explanations for the application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

It should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and/or "including" are used in this specification, they indicate There are features, steps, operations, devices, components, and/or combinations thereof.

For the convenience of description, if the words "up", "down", "left" and "right" appear in this disclosure, they only mean that they are consistent with the up, down, left, and right directions of the drawings themselves, and do not limit the structure. It is for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

Glossary:

Incarceration is a medical term that means stuck.

As described in the background art, the inventor found that when the existing soft lens sheath performs negative pressure suction on the debris after renal calculus (above 2 cm) lithotripsy, the negative pressure straw is prone to blockage, and the location of the gravel is relatively high. Scattered, the gravel cannot be sucked out quickly and effectively, and multiple operations are required. In order to solve the above technical problems, this application proposes a flexible ureteroscope sheath kit with a rotatable inner sheath.

The present application provides a flexible ureteroscope sheath kit with a rotatable inner sheath, including an outer sheath body. The outer sheath body enters the human body from a natural tube to perform non-invasive surgery. The non-working end of the outer sheath body is provided with a reducing channel. The side of the reducing channel is provided with a negative pressure suction port, the end of the reducing channel is fixedly connected with the sleeve member, the sleeve member is connected with the rotating connector, the rotating connector can rotate 360°, and the rotating connector is connected with the inner sheath tube. The sheath is arranged in the outer sheath, and the working end of the inner sheath extends beyond the working end of the outer sheath for a set length. The non-working end of the inner sheath is provided with a perfusion flushing port. The outer sheath and the inner sheath are formed from the inner sheath inward A continuous lavage system with continuous perfusion and continuous negative pressure suction by the outer sheath completes the removal of foreign bodies during the operation; a water outlet is provided at the working end or side of the inner sheath.

In the following, the soft lens sheath kit disclosed in this embodiment will be further described with reference to FIGS. 1 to 10;

As shown in Figure 1, a flexible ureteroscope sheath kit with a rotatable inner sheath includes an outer sheath body 1. The outer sheath body 1 is entered from the human body’s natural pipeline to achieve non-invasive surgery. The inner sheath tube 2 is detachably and assembled in In the outer sheath body 1.

The non-working end of the outer sheath body 1 is provided with a variable-diameter channel 10, and the variable-diameter channel is provided with an equal-diameter channel section from the non-working end of the outer sheath body toward the working end, and then a channel section with a gradually decreasing tube diameter is provided. That is, the size of the non-working end of the outer sheath is larger than the size of the working end.

The working end of the outer sheath is the end that extends into the kidney for operation, and the other end is the non-working end and the hand-held end. The working end of the inner sheath is defined as the working end of the outer sheath.

A negative pressure suction port 3 is provided on the side of the variable diameter channel 10, the negative pressure suction port 3 is arranged obliquely, the negative pressure suction port 3 is connected with the negative pressure suction pump, the non-working end of the inner sheath 2 is provided with a perfusion flushing port, and the perfusion flushing port is connected with the perfusion flushing pump The lavage liquid enters the inner sheath 2 through the perfusion and flushing pump, and flows out from the gap between the inner sheath 2 and the outer sheath 1. The outer sheath 1 and the inner sheath 2 form the inner sheath 2 and continue to infuse inward The continuous lavage system with continuous negative pressure suction by the outer sheath 1 completes the removal of intraoperative stones, blood clots and other foreign objects, which can circulate liquids, etc., can quickly and efficiently aspirate gravels, etc., and will not cause suction tube Blocked to ensure a clear vision under the mirror. The present disclosure adopts suction while flushing, and double-tube negative pressure for lavage and suction. The suction pipeline is not prone to blockage, and it can effectively attract and clear out renal gravel when the vision is unclear during the operation or when the operation is performed on larger stones. , It can ensure the continuity of the operation, and the operation can be completed at one time without the need to move the knife again.

For stones with a diameter greater than 2 cm in the kidney, the main reason why the prior art cannot use flexible ureteroscope lithotripsy is that intrarenal lithotripsy and blood clots are mixed in the kidney resulting in unclear surgical vision. The soft lens sheath kit of the present disclosure can Efficient cleaning of gravel and blood clots can solve the problem of unclear vision during the operation, so that stones with a diameter greater than 2cm can also be operated with soft mirror surgery, which can expand the indications of soft mirror surgery.

The outer sheath body enters the kidney from the human body’s natural tube ureter, and the instruments for intra-renal calculus lithotripsy are entered through the outer sheath body tube to perform soft endoscopic surgery. In the event of a blood clot in the kidney or the need to remove the stone, the surgical instrument is withdrawn. The inner sheath tube is entered through the outer sheath body pipeline, and the inner sheath tube and the outer sheath body form a continuous lavage system. The inner sheath tube is introduced into the outer sheath body without the need for flexible ureteroscope and other auxiliary techniques. The operation is simple and the operation time can be reduced. Therefore, there is no need to perform other operations such as opening holes in the patient's body, and non-invasive surgery can be truly realized, reducing the patient's pain and allowing the patient to recover in a short time.

In the present disclosure, the working end 4 of the inner sheath tube is extended from the working end of the outer sheath body 1 to a set length, and the outer diameter of the outer sheath body can be F14-16, and the inner diameter can be F12-14. The working end of the inner sheath tube 2 protrudes about 0.5 cm from the outer sheath body. The working end 4 of the inner sheath is set to extend out of the working end of the outer sheath body 1 for a set length, so that the setting can prevent the flushing liquid from flowing into the inner sheath from the perfusion and flushing pump directly to the inner sheath and the outer sheath. The working end of the inner sheath extends out of the working end of the outer sheath, so that the flushing liquid will flow into the kidney first after flowing out through the working end of the inner sheath, and the liquid will only flow from the inner sheath, The outer sheath flows out from the gap, thereby extending the flow path of the flushing liquid and ensuring the flushing effect.

The end of the reducing channel 10 is fixedly connected with the sleeve member 7, and the end of the sleeve member 7 and the end of the reducing channel 10 can be fastened by threads. That is, the end of the outer sheath body reducing channel 10 is provided with an external thread, and the sleeve member 7 is provided with an inner Thread, the sleeve part is sleeved on the end of the variable diameter channel and connected with the thread. The sleeve member 7 and the reducing channel 10 are connected in a sealed manner, that is, a sealing gasket is arranged between the inside of the sleeve member 7 and the reducing channel 10. The sleeve member 7 is connected with the rotating connector 11, the rotating connector 11 can be rotated 360°, and the rotating connector 11 is connected with the inner sheath tube 2. When rotating and washing the gravel in the kidney, it is beneficial to flush to every position in the kidney Stone crushed stone, improve the cleaning effect of crushed stone.

When aspiration of intra-renal calculus is performed under negative pressure, the gravel may be incarcerated between the inner sheath and the outer sheath. Since the inner sheath can rotate 360° in the solution of the present disclosure, the inner sheath can be rotated during the rotation process. The matching place with the outer sheath body has the effect of grinding and releasing the incarceration of debris in the lumen of the outer sheath body, and the negative pressure suction effect is obviously improved.

In the soft lens sheath kit of the present disclosure, the inner sheath tube can be rotated 360°. When lavage is used to attract intra-renal lithotripsy, the inner sheath tube can be rotated to the negative pressure suction port of the outer sheath body. The negative pressure suction port will not be blocked, thereby ensuring the continuous and reliable suction of the gravel.

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 to the rotary connector 11; the through hole is eccentrically arranged on the rotary connector 11, and the inner sheath tube 2 is tight when the rotary connector 11 is connected to the sleeve member 7. Attached to the inner wall of the outer sheath body 1. This ensures that the cross section of the suction channel between the outer sheath and the inner sheath is maximized, and the efficiency of sucking out foreign objects such as stones and blood clots is improved.

In this embodiment, the inner sheath 2 and the rotating connector 11 are arranged as an integral structure.

As shown in Fig. 3, the sleeve member 7 is a hollow structure, and the outer circumference of the sleeve member 7 is provided with a circumferential clamping groove 17;

As shown in Fig. 4, the rotary connector 11 includes a columnar structure 13, which extends to the inside of the casing member 7; both sides of the middle of the columnar structure 13 are connected to the connecting rod 14, and the end of the connecting rod 14 is connected to the clamping rod 15. The connecting rod 14 is perpendicular to the axis of the columnar structure 13, the clamping rod 15 is parallel to the axis of the columnar structure 13, and the gap between the two clamping rods 15 is approximately the same as the outer diameter of the casing member.

The clamping rod 15 is provided with a clamping block 16 facing the inner end of the sleeve member 7. When the rotating connector 11 is connected to the sleeve member 7, the clamping block 16 is clamped in the clamping slot 17 and the clamping block 16 can rotate along the clamping slot 17.

In this embodiment, the columnar structure 13, the connecting rod 14, and the clamping rod 15 are arranged in an integral shape.

When in use, pinch the end of the clamping rod 15 where the clamping block 16 is not provided, then the end of the clamping rod 15 where the clamping block 16 is set is tilted, and the rotating connector 11 is moved to match the sleeve member 7, and then the clamping rod 15 is released. , The clamping block 16 of the clamping rod 15 is clamped in the clamping groove 17 to complete the fixation of the rotating connector 11 and the sleeve member 7; when washing the gravel, rotating the rotating connector 11 drives the inner sheath 2 to rotate, so that The flushing liquid flowing out of the sheath tube 2 forms a vortex.

In one embodiment, as shown in FIG. 4, the working end of the inner sheath 2 is closed, and a water outlet 12 is provided on the side of the working end 4 of the inner sheath to form a side spray type;

In another embodiment, as shown in Figure 5, the side of the inner sheath 2 is closed, and a water outlet is provided at the end of the working end of the inner sheath 2 to form a direct spray type. These two forms are due to the difference in water outlet angles. , Provides different intra-renal vortex effects;

In specific use, the two forms of inner sheath can be used alternately, that is, one form of inner sheath is used for flushing, and then another form of inner sheath is used for flushing, which can improve the stone removal effect.

In the soft lens sheath kit of the present disclosure, the inner sheath tube is filled with flushing liquid, and the negative pressure suction port provided on the outer sheath body is used for negative pressure suction. The side or end of the inner sheath tube is provided with a water outlet, and the flushing liquid passes through the inner sheath. After the working end of the sheath flows out, it will flow into the kidney first, and the liquid will flow out from the gap between the inner sheath and the outer sheath during negative pressure suction, further extending the flow path of the flushing liquid, increasing the effective flushing area of the flushing liquid, and improving The success rate of intraoperative removal of stones, blood clots and other foreign bodies.

In the soft lens sheath kit of the present disclosure, the outer sheath body 1 and the inner sheath tube 2 are both hollow tubes. When the inner sheath tube 2 is arranged in the outer sheath body 1, the inner sheath tube 2 is closely attached to the inner wall of the outer sheath body 1. Set the inner sheath closely to the inner wall of the outer sheath to avoid the displacement of the inner sheath due to the attractive force during the lavage process, thereby reducing the gap between the outer sheath and the inner sheath, which affects the stone Suction effect.

The inner sheath tube 2 includes 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 one body. The cross section of the first tube wall 5 is arc-shaped, and the cross section of the second tube wall 6 is linear, as shown in Fig. 7; or the cross section of the second tube wall 6 is in the shape of a broken line, as shown in Fig. 8; or The cross-section of the second tube wall 6 is curvilinear, as shown in Fig. 9, it can be set to be arc-like, oblate-like or arc-like; when it is set as broken line or curve, 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 cross sections along the radial direction of the inner sheath.

The first tube wall 5 is attached to the inner wall of the outer sheath body 1, and the junction of the first arc-shaped tube wall 5 and the second arc-shaped tube wall 6 abuts against the inner wall of the outer sheath body 1, and the outer wall of the first tube wall 5 Close to the inner wall of the outer sheath, the outer diameter of the first tube wall 5 is approximately equal to the inner tube diameter of the outer sheath. The closer the outer diameter of the first tube wall 5 is to the inner tube diameter of the outer sheath, the better, so that the entire inner tube The sheath tube is close to the inner wall of the outer sheath, so that when the inner sheath tube rotates 360° in the body cavity of the outer sheath, the outer side wall of the first tube wall is always close to the inner wall of the outer sheath.

When the second tube wall 6 is also set in an arc shape, as shown in FIG. 6, the curvature of the first tube wall 5 is greater than the curvature of the second tube wall 6.

When a water outlet is provided on the side of the working end of the inner sheath tube 2, the water outlet 12 of the inner sheath tube 2 is provided on the outer side of the first tube wall 5.

The cross-sectional shape of the inner sheath 2 can be any shape such as a circle. As a preferred embodiment of the present invention, as shown in FIG. 6, the cross-sectional shape of the inner sheath 2 is set to a crescent shape.

Set the cross section of the inner sheath into a crescent shape. The maximum diameter of the inner sheath is approximately equal to the inner diameter of the outer sheath. When it enters the inside of the outer sheath, it can better adhere to one side of the outer sheath, and the inner sheath The two ends of the inner sheath can be pressed against the side wall of the outer sheath; especially when the outer diameter of the inner sheath and the inner diameter of the outer sheath are approximately equal, the inner sheath is ensured to be close to the inner wall of the outer sheath, and the effective negative pressure suction channel area is maximized.

The cross-sectional shape of the inner sheath tube can also be set to a circular arc shape or an oblate shape. At this time, the relative rigidity of the material of the rotating connector and the inner sheath is to ensure that the inner sheath is closely attached to the inner wall of the outer sheath.

The inner sheath 2 of the present invention can be provided with a single pipe or a double pipe. As shown in Fig. 6, when it is set as a single pipe, the perfusion channel 8 is used for perfusion and flushing. The cross-sectional shape of the perfusion channel 8 is the same as that of the inner sheath 2 The same shape can also be set as a crescent shape; as shown in FIG. The pressure measurement channel 9 can be connected to an external pressure measurement instrument for pressure measurement. When installing dual pipelines, if pressure measurement is not required, the pressure measurement channel should be closed. The sealing can be in the form of plugging the end of the pressure measurement channel with a block or any other form that can block it; pressure measurement is required At this time, remove the blocking structure, keep the pressure measurement channel unblocked, and connect it to the pressure measurement instrument. Pressure measurement belongs to common knowledge in the field, and will not be repeated here.

Although the specific embodiments of the present disclosure are described above in conjunction with the accompanying drawings, they do not limit the scope of protection of the present disclosure. Those skilled in the art should understand that on the basis of the technical solutions of the present disclosure, those skilled in the art do not need to make creative efforts. Various modifications or variations that can be made are still within the protection scope of the present disclosure.

The above descriptions are only preferred embodiments of the application, and are not used to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A flexible ureteroscope sheath kit with a rotatable inner sheath, which is characterized in that it comprises an outer sheath body, the non-working end of the outer sheath body is provided with a variable diameter channel, and a negative pressure suction port is arranged on the side of the variable diameter channel. The end of the channel is fixedly connected with the sleeve member, the sleeve member is connected with the rotating connector, the rotating connector can rotate 360°, the rotating connector is connected with the inner sheath tube, the inner sheath tube is arranged in the outer sheath, the inner sheath tube The non-working end is provided with a perfusion flushing port; the working end or side of the inner sheath tube is provided with a water outlet.
The flexible ureteroscope sheath kit with a rotatable inner sheath according to claim 1, wherein the working end of the inner sheath extends beyond the working end of the outer sheath by a set length; the sleeve member and the end of the variable diameter channel The parts are tightly connected by threads; the sleeve member and the variable-diameter channel are sealedly connected; the negative pressure suction port is arranged obliquely; the outer sheath and the inner sheath are both hollow pipelines.
The flexible ureteroscope sheath kit with a rotatable inner sheath according to claim 1, wherein the rotating connector is provided with a through hole, and the inner sheath passes through the through hole and is fixedly connected to the rotating connector; The through hole is eccentrically arranged on the rotating connector, and when the rotating connector is connected with the sleeve member, the inner sheath is tightly attached to the inner wall of the outer sheath; the inner sheath and the rotating connector are of an integrated structure.
The flexible ureteroscope sheath kit with a rotatable inner sheath according to claim 1, wherein the sleeve member is a hollow structure, the rotating connector includes a columnar structure, and the columnar structure extends into the sleeve member; Both sides of the middle part of the columnar structure are connected with connecting rods, the ends of the connecting rods are connected with the 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.
The flexible ureteroscope sheath kit with a rotatable inner sheath according to claim 4, wherein the clamping rod is provided with a clamping block facing the inside of the end of the sleeve member, and the outer periphery of the sleeve member is provided with a circumferential clamping groove When the rotating connector is connected with the sleeve member, the clamping block is clamped in the clamping slot and the clamping block can rotate along the clamping slot; the columnar structure, the connecting rod and the clamping rod are integrally formed.
The flexible ureteroscope sheath kit with a rotatable inner sheath according to claim 1, wherein when the inner sheath is arranged in the outer sheath, the inner sheath is close to the inner wall of the outer sheath; The perfusion flushing port is in communication with the perfusion flushing pump, and the negative pressure suction port is in communication with the negative pressure suction pump.
The flexible ureteroscope sheath kit with a rotatable inner sheath according to claim 1, wherein the cross-sectional shape of the inner sheath is crescent-shaped or arc-shaped or oblate.
The flexible ureteroscope sheath kit with a rotatable inner sheath according to claim 1, wherein the inner sheath comprises a first tube wall and a second tube wall, and the first tube wall and the second tube wall are connected Integral; the cross section of the first tube wall is arc-shaped, and the cross section of the second tube wall is linear or broken line or curved.
The flexible ureteroscope sheath kit with a rotatable inner sheath according to claim 8, wherein the first tube wall is attached to the inner wall of the outer sheath, and the first tube wall and the second tube wall are The connection is against the inner wall of the outer sheath, and the outer diameter of the first tube wall is approximately equal to the inner tube diameter of the outer sheath, so that when the inner sheath rotates 360° in the outer sheath body cavity, the outer side wall of the first tube wall is always tight. Sticking to the inner wall of the outer sheath; when a water outlet is provided on the side of the working end of the inner sheath, the water outlet is provided on the outer side of the first tube wall.
The flexible ureteroscope sheath kit with a rotatable inner sheath according to claim 1, wherein the inner sheath is provided with a single tube or a double tube, and when set as a single tube, it is a perfusion channel; In the case of dual pipelines, one pipeline is the perfusion channel and the other pipeline is the pressure measurement channel.