CN117159133A - Ureter channel sheath and ureter rubble stone instrument of getting - Google Patents

Abstract

The invention relates to the technical field of medical instruments, in particular to a ureteral channel sheath and a ureteral lithotripsy and lithotripsy tool. The ureter channel sheath comprises a sheath body and a control part, wherein the sheath body comprises a proximal end and a distal end which are opposite, the proximal end is connected with the control part, the control part can drive the sheath body to rotate around the axis of the sheath body, and the distal end of the sheath body can be driven to bend laterally; the sheath tube body is internally provided with a stone taking channel and a flushing channel which penetrate through the sheath tube in the length direction, and the distal end is provided with an illumination component, an imaging component, a laser component, a stone taking channel opening and a flushing channel opening. The ureteral passage sheath integrates a plurality of functional components, so that medical staff only need to insert the sheath body into a patient during operation, and the operation steps are greatly simplified. And the control part is arranged to change the relative position relation between the far end and the calculus part of the patient easily, so that the operation effect of the calculus removing operation is improved and the operation time is shortened.

Description

Ureter channel sheath and ureter rubble stone instrument of getting

Technical Field

The invention relates to the technical field of medical instruments, in particular to a ureteral channel sheath and a ureteral lithotripsy and lithotripsy tool.

Background

The ureteral soft lens lithotomy is mainly used for treating kidney stones with the size smaller than 2cm, upper ureteral stones and stone of the infronactivating subrenal cup. Especially for the patients with extreme obesity, serious spinal deformity and difficult establishment of PNL channel, the retrograde lithotomy by the ureteroscope is a common means in clinic.

In ureteroscope lithotomy, the role of the ureteral access sheath is very important. Because ureter passageway sheath is more rigid and each position diameter is the same than ureter soft lens, consequently in the soft lens stone extraction art, can insert ureter passageway sheath in the ureter first, make the soft lens can reach the position at calculus along ureter passageway sheath, can insert laser fiber in the instrument passageway on the soft lens afterwards, break up the calculus by the laser through laser fiber to through the expansion passageway on the ureter passageway sheath, discharge the rubble after the calculus was broken up.

However, as the analysis is performed in the foregoing, the ureteral soft lens in the conventional technology must be matched with the ureteral channel sheath to complete a series of operations of intubation, lithotripsy and lithotripsy successively, so that more components are required to be used and all components are required to be matched with each other in the use process, which results in increased operation steps of the operation, increased operation difficulty and increased operation time, and poor experience of both patients and medical staff.

Disclosure of Invention

Based on the above, the ureteral channel sheath and the ureteral lithotripsy and lithotripsy tool provided by the invention simplify the surgical instrument and reduce the surgical difficulty by redesigning the structure.

The invention discloses a ureteral channel sheath, which comprises a sheath body and a control part, wherein the sheath body comprises a proximal end and a distal end which are opposite, the proximal end is connected with the control part, the control part can drive the sheath body to rotate around the axis of the sheath body, and the distal end of the sheath body can be driven to bend laterally; the sheath tube is characterized in that a stone taking channel and a flushing channel which penetrate through the sheath tube in the length direction are arranged in the sheath tube body, an illumination component, an imaging component, a laser component, a stone taking channel opening and a flushing channel opening are arranged at the far end, the stone taking channel opening is communicated with the stone taking channel, and the flushing channel opening is communicated with the flushing channel.

In some of these embodiments, the centers of at least three of the imaging component, the laser component, the lithotomy channel opening, and the irrigation channel opening are located on the same circumference, and the center of the circumference is located on the axis of the sheath body.

In some of these embodiments, the imaging component, the laser component, the stone extraction channel opening, and the irrigation channel opening are all disposed on the circumference with an included angle of 90 ° between adjacent ones.

In some of these embodiments, the laser member is disposed in the center of the distal end, and the imaging member, the stone removal channel opening, and the irrigation channel opening are disposed around the laser member.

In some of these embodiments, the control component comprises a first motion assembly, the ureteral access sheath further comprising an elongate piece disposed at least partially within the sheath body, one end of the elongate piece being connected to the distal end, the other end of the elongate piece being connected to the first motion assembly; the first moving assembly is capable of reciprocating along the extending direction of the long fine member.

In some embodiments, the elongate member comprises a first portion and a second portion connected, the second portion being disposed within the sheath body and being capable of movement along the axis of the sheath body, the second portion being connected to the control member, the first portion being disposed outside the sheath body, the first portion passing through a side wall of the sheath body and being connected to the distal end.

In some of these embodiments, the control member further comprises a second motion assembly capable of rotating about its axis, an axial end of the second motion assembly being connected to the proximal end.

In some embodiments, the second moving component is provided with a limiting structure arranged along the axis of the sheath body, and the first moving component is connected with the limiting structure and moves along the axis of the sheath body.

In some of these embodiments, the control component further comprises a first drive motor drivingly connected to the first motion assembly and a second drive motor drivingly connected to the second motion assembly.

The invention further discloses a ureter lithotripsy and stone removing tool, which comprises any one of the ureter channel sheaths, a negative pressure device, a liquid injection device and a laser generating device, wherein the negative pressure device is communicated with the stone removing channel of the ureter channel sheath, the liquid injection device is communicated with the flushing channel of the ureter channel sheath, and the laser generating device is connected with a laser component of the ureter channel sheath.

Advantageous effects

Compared with the complicated scheme that a plurality of medical devices are required to be inserted into a patient body and matched with each other to finish ureter lithotomy in the prior art, the ureter channel sheath provided by the invention has the advantages that under the condition that the original characteristic that the sheath body is easy to insert into the body is maintained, the illumination component, the imaging component, the laser component, the lithotomy channel opening and the flushing channel opening are integrated at the far end of the sheath body, so that medical staff only need to insert the sheath body into the patient body in the operation, and the operation steps are greatly simplified.

Furthermore, due to the fact that the control component capable of controlling the rotation of the sheath tube body and the lateral bending of the distal end is arranged, after a medical staff determines the relative position relation between the distal end and the calculus part according to the imaging component, the relative position relation between the distal end and the calculus part can be changed through the control component, so that the laser component, the calculus removing channel opening and the flushing channel opening on the distal end can be moved to the optimal working positions in different steps of the calculus removing operation, the operation effect of the calculus removing operation is further improved, the operation duration is shortened, and half of the work is really achieved.

Drawings

Fig. 1 is a schematic view of the ureteral lithotripsy and lithotripsy tool of the present invention in some embodiments;

fig. 2 is a cross-sectional view of the distal end of the ureteral access sheath of the present invention, in some embodiments;

fig. 3 is a cross-sectional view of the distal end of the ureteral access sheath of the present invention, in another embodiment;

fig. 4 is a schematic view of the sheath body of the ureteral access sheath of the present invention in some embodiments;

fig. 5 is a schematic view of the sheath body of the ureteral access sheath of the present invention in another part of embodiments;

fig. 6 is a schematic structural view of a control part of the ureteral access sheath of the present invention in some embodiments;

fig. 7 is a schematic view of a second motion assembly of the control component of the ureteral access sheath of the present invention, in some embodiments;

fig. 8 is a schematic view of a first motion assembly of a control component of the ureteral access sheath of the present invention, in some embodiments;

fig. 9 is a schematic structural view of a control part of the ureteral access sheath of the present invention in another part of embodiments;

fig. 10 is a schematic structural view of a head end structural member of the ureteral access sheath of the present invention in some embodiments.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, fig. 1 shows a schematic view of a ureteral lithotripsy and lithotripsy tool in an embodiment of the present invention, which provides a ureteral lithotripsy and lithotripsy tool comprising a ureteral access sheath comprising a sheath body 400 for insertion into a patient's ureter. The sheath body 400 should be provided to have flexibility and excellent resilient properties so that the sheath body 400 can be inserted relatively smoothly into the patient ureter and is not bent during the insertion process, sufficiently securing the function of the ureter lithotripsy and lithotripsy tool of the present invention. Furthermore, the sheath body 400 should also have good biocompatibility to avoid injury to the patient during insertion. As a partially concrete example, the sheath body 400 may be selectively formed of bio-silica gel.

It will be appreciated that the sheath body 400 includes a distal end 401 that is relatively closer to the patient and a proximal end 402 that is relatively closer to the medical personnel. Fig. 2 shows a radial cross-section of distal end 401 in some embodiments of the invention. As can be seen, the distal end 401 is provided with an illumination means 503, an imaging means 505 and a laser means 502, and when the sheath body 400 is inserted into the ureter of a patient, the distal end 401 should be positioned in the vicinity of the stones in the ureter. An illumination component 503 on the distal end 401 illuminates the ureteral stone site, providing a good imaging environment for the imaging component 505. The imaging component 505 is connected with an external display screen, the imaging component 505 shoots a calculus position in the ureter, and displays the condition of the calculus position in the ureter on the display screen in real time, so that a medical staff can adjust the operation according to the displayed condition of the calculus position, for example, further control the control component 300 to adjust the relative position of the distal end 401 and the calculus position, make the distal end 401 be closer or farther to the calculus position, or change the azimuth relationship between the distal end 401 and the calculus, and the like. When the distal end 401 reaches the target position, the laser member 502 emits laser light toward the site of the stone, thereby breaking up the stone.

The sheath body 400 is further provided therein with a stone removal passage and a flushing passage penetrating the sheath body in the longitudinal direction thereof. As shown in fig. 2, the stone removal channel and the flushing channel form a stone removal channel opening 403 and a flushing channel opening 404, respectively, on the distal end 401. The flushing channel provides a channel for water, and medical staff can irrigate water into the ureter by using the flushing channel. With reasonable control of the perfusion pressure, perfusion time, the patient's intrarenal pressure can be maintained stable while maintaining a clear view of the imaging assembly 505. The stone extraction channel is used as a stone extraction channel for the broken stones. In some embodiments, the stone extraction channel may be connected to a negative pressure device, so that a negative pressure environment is formed in the stone extraction channel, and crushed stone under the action of pressure can be sucked into the stone extraction channel from the stone extraction channel opening 403 and discharged to the outside along the stone extraction channel.

Specifically, on the distal end 401 of the ureteral access sheath of the present invention, the center of at least three of the illumination component 503, the imaging component 505, the laser component 502, the lithotomy access opening 403, and the irrigation access opening 404 is arranged on a circle centered on the axis of the sheath body 400. As shown in fig. 1, the ureteral access sheath according to the present invention further comprises a control member 300, wherein the control member 300 is connected to the proximal end 402, and the control member 300 is capable of driving the sheath body 400 to rotate about its axis and of driving the distal end 401 to bend laterally.

Compared with the complicated scheme that a plurality of medical devices are required to be inserted into a patient body and matched with each other to finish ureteral lithotomy in the prior art, under the condition that the characteristic that the sheath body 400 is easy to be inserted into the body is maintained, the distal end 401 of the sheath body 400 is integrated with the illumination component 503, the imaging component 505, the laser component 502, the lithotomy channel opening 403 and the flushing channel opening 404, so that medical staff only need to insert the sheath body 400 into the patient body in the operation, and the operation steps are greatly simplified.

Furthermore, since the control component 300 capable of controlling the rotation of the sheath body 400 and the lateral bending of the distal end 401 is arranged, after the relative position relationship between the distal end 401 and the calculus part is determined according to the imaging component 505, a medical staff can change the relative position relationship between the distal end 401 and the calculus part through the control component 300, so that the laser component 502, the calculus removing channel opening 403 and the flushing channel opening 404 on the distal end 401 can move to the optimal working positions in different steps of the calculus removing operation, the operation effect of the calculus removing operation is further improved, the operation time is shortened, and half of the work is really achieved.

In some embodiments, as shown in fig. 2, the ureteral access sheath of the present disclosure arranges at least three of the imaging component 505, the laser component 502, the lithotomy access opening 403, and the irrigation access opening 404 on the distal end 401 of the sheath body 400 on a circle centered on the axis of the sheath body 400. So set up, the position of laser part 502, stone extraction channel opening 403, flushing channel opening 404 will be easier to judge, when control part 300 makes sheath body 400 rotate, the medical staff can easily make laser part 502, stone extraction channel opening 403, flushing channel opening 404 adjust to the target position.

For example, as shown in fig. 2, in this embodiment, the imaging member 505, the laser member 502, the stone extraction channel opening 403, and the flushing channel opening 404 are all arranged on a circle centered on the axis of the sheath body 400, and the angle between adjacent two is 90 °. Because the center distances from the imaging component 505, the laser component 502, the stone taking channel opening 403 and the flushing channel opening 404 to the distal end 401 are equal, and the included angles between the two adjacent two are equal, the method means that after the distal end 401 is rotated by the control component 300, medical staff can quickly determine the relative position relationship between the laser component 502, the stone taking channel opening 403 and the flushing channel opening 404 and the stone part according to the image rotation condition of the stone part represented by the imaging component 505. For example, when the operator learns to turn 90 ° from the laser member 502 to the stone removal channel opening 403, and also learns to turn 90 ° back from the laser member 502 to the flush channel opening 404. As are other parts.

In yet other embodiments, as shown in fig. 3, a laser member 502 is disposed centrally of the distal end 401, and an imaging member 505, a stone removal channel opening 403, and an irrigation channel opening 404 are disposed around the laser member 502. So configured, when the medical personnel rotates the distal end 401 through the control member 300, the position of the laser member 502 will remain unchanged, thereby making the lithotripsy procedure more convenient. For example, if flushing is desired during use, the flush channel opening 404 may be rotated to the target flush position. If the laser component 502 is not centrally located, the laser component 502 needs to be repositioned after the flushing is completed, which is time-consuming and labor-consuming. The laser component 502 is arranged at the center, and the stone breaking can be continued after the completion again without repeated adjustment.

In some preferred embodiments, the laser member 502 is positioned in close proximity to the stone removal passage opening 403, which facilitates the stone removal process. Specifically, when the fiber-optic lithotripsy is completed, if the lithotripsy is small, the distal end 401 does not need to be rotated or moved, and the lithotripsy can be immediately discharged due to the close positioning of the lithotripsy channel opening 403. If the broken stone is larger, the broken stone can be discharged by aligning the broken stone taking passage opening 403 with the broken stone only by rotating a small angle.

Similarly, in other embodiments, the placement of the laser member 502 immediately adjacent the irrigation channel opening 404 may also facilitate irrigation. Alternatively, in other embodiments, the laser member 502 may be disposed closely adjacent to the imaging member 505, which may facilitate operation: because of the complex lithotripsy process, it is particularly important to have a clear view during the process, requiring constant adjustment of the position of the distal end 401 to adjust the position of the laser member 502. By arranging the laser member 502 closely adjacent to the imaging member 505, a good field of view can be provided for the lithotripsy process, ensuring the accuracy and convenience of operation for medical personnel.

It should be noted that, those skilled in the art should understand that the distal end 401 and the proximal end 402 may be integrally provided with the sheath body 400, and belong to a portion of the sheath body 400, and then the materials of the distal end 401 and the proximal end 402 are the same as other portions of the sheath body 400; of course, the distal end 401 and the proximal end 402 may be independent of the sheath body 400, and only the relative positions of the distal end and the proximal end exist, so that the materials of the distal end 401 and the proximal end 402 may be different from the sheath body 400.

It should also be noted that the above embodiment does not describe the form of the illumination member 503 on the distal end 401 in detail, but it is understood that the illumination member 503 may be arranged arbitrarily, so long as it ensures a clear view of the imaging member 505 during surgery. For example, the illumination component 503 may be disposed adjacent the imaging component 505 to provide optimal illumination intensity, or may be disposed symmetrically with respect to the imaging component 505 about the axis of the distal end 401, such that a greater field of view is obtained by the imaging component 505. The number of illumination means 503 may be more than one, for example, 2, 3, 4, etc., and with a greater number of supports, the illumination means 503 may achieve both of the foregoing arrangements of positions simultaneously.

Furthermore, the person skilled in the art can set the illumination member 503, the imaging member 505, and the laser member 502 at his/her own discretion as the case may be, as to how they are mounted on the distal end 401 of the sheath body 400. In some embodiments, the sheath body 400 is provided with mounting channels corresponding to the illumination component 503, the imaging component 505, and the laser component 502, and each of the components of the illumination component 503, the imaging component 505, and the laser component 502 may be mounted in the corresponding mounting channel. As to how the individual mounting tunnels are distributed, or how the individual components within the mounting tunnels are disposed, the ureteral access sheath of the present invention is not limited as long as it ensures that distal end 401 functions properly.

Preferably, as shown in fig. 10, the distal end 401 of the sheath body 400 is provided with a head end structural member 501, and a plurality of holes are formed on the end surface of the head end structural member 501, including a negative pressure channel mounting hole 5011, a laser component mounting hole 5012, an illumination component mounting hole 5013, a second illumination component mounting hole 5014, an imaging component mounting hole 5015, and a flushing channel mounting hole 5016. The negative pressure passage mounting holes 5011 provide support for the negative pressure passage 401 mounting. The laser component mounting holes 5012 provide support for the laser component 502 mounting; the first and second lighting component mounting holes 5013, 5014 provide support for the lighting component 503 mounting; the imaging member mounting holes 5015 provide support for the imaging member 505 mounting; the flush channel mounting holes 5016 provide support for the mounting of the flush channel openings 403. Meanwhile, the illuminating component 503, the imaging component 505, the laser component 502 and other components are integrated on the head end structural component 501, so that broken stone can be prevented from accumulating in the concave part of the distal end 401.

As for the specific form of the control means 300 in the ureteral access sheath of the present invention, the ureteral access sheath of the present invention is not strictly limited. In some embodiments, as shown in fig. 4, the ureteral access sheath further comprises a long piece 405, and correspondingly, as shown in fig. 8, the control component 300 comprises a first moving component 307, the long piece 405 is at least partially disposed in the sheath body 400, one end of the long piece 405 is connected with the distal end 401, and the other end of the long piece 405 is connected with the first moving component 307; the first moving member 307 is capable of reciprocating in the extending direction of the long piece 405. So configured, movement of the first movement assembly 307 causes the long piece 405 to move the distal end 401, thereby changing the distance between the distal end 401 and the proximal end 402. Since the length of the sheath body 400 is determined, when the distance between the distal end 401 and the proximal end 402 is shortened, the distal end 401 must bend laterally in the length direction of the sheath body 400, so that the angle between the distal end 401 and the sheath body 400 is changed, and the positional relationship between the distal end 401 and the calculus site of the patient is also changed.

It will be appreciated that the location of the elongate member 405 within the sheath body 400 may also be adjusted as appropriate. As shown in fig. 4, in some embodiments, the elongate member 405 is disposed entirely within the sheath body 400 and offset to one side of the axis of the sheath body 400. At this time, the first moving member 307 is moved away from the distal end 401, and the distal end 401 is deflected toward the side of the long component 405; moving the first moving member 307 in the direction of the distal end 401 deflects the distal end 401 away from the side on which the elongate member 405 is located.

In yet other embodiments, as shown in fig. 5, a straight line 4044 divides both the sheath body 400 and the long piece 405 into two parts, wherein the sheath body 400 is divided into a curved section 4041 and a non-curved section 4042, the long piece 405 is divided into a first part 4043 and a second part 4045, the second part 4045 is correspondingly disposed in the non-curved section of the sheath body 400 and can move along the length direction thereof, the first part 4043 is correspondingly disposed outside the curved section 4041, the first part 4043 penetrates through the side wall of the sheath body 400, and the distal end 401 is connected with the second part 4045. So configured, because the first portion 4043 is free from the constraint of the sheath body 400, the length of the first portion 4043 can be set to be less than the length of the curved section 4041, and therefore, when the second portion 4045 is pulled, the first portion 4043 can pull the distal end 401 more greatly in the direction of the proximal end 402 than in the previous embodiment, so that the curved section 4041 is curved to a greater extent, thereby changing the relative position of the distal end 401 and the stone site more drastically, and further improving the convenience of use of the ureteral access sheath of the present invention.

As shown in fig. 6, the control member 300 of the ureteral access sheath of the present invention further comprises a second movement assembly 309, the second movement assembly 309 being elongated and being rotatable about its own axis, the axial end of the second movement assembly 309 being connected to the proximal end 402. Thus, when the second moving component 309 rotates, it drives the sheath body 400 to rotate.

Further, in some embodiments, as shown in fig. 6, the second moving component 309 is provided with a limiting structure disposed along the axis of the sheath body 400, and the first moving component 307 is connected to the limiting structure and moves along the axis of the sheath body 400. In this way, the first moving component 307 and the second moving component 309 are connected into a whole, and each of them realizes functions, and at the same time, the overall stability of the control component 300 is better, and the spatial arrangement is more reasonable. As a specific example, as shown in fig. 7, the second moving assembly 309 is a hollow cylinder, in which the hollow body is provided as a square sliding groove 3093, the first moving assembly 307 is provided as a square slider matched with the sliding groove 3093 as shown in fig. 8, the slider is capable of sliding along the sliding groove 3093, and the square slider cannot rotate relative to the sliding groove 3093 due to the square structural feature. Further, axial guide grooves 3091, 3092 are further formed in the groove walls on two sides of the sliding groove 3093, protrusions 3071, 3072 are arranged on two sides of the square sliding block corresponding to the guide grooves 3091, 3092, and the protrusions 3071, 3072 extend into the guide grooves 3091, 3092 to achieve positioning.

The ureteral access sheath of the present invention is not strictly limited as to how the first moving component 307 reciprocates along the extension direction of the long piece 405 and how the second moving component 309 rotates about its own axis. However, preferably, as shown in fig. 6, the control unit 300 further comprises a first drive motor 311 in driving connection with the first moving assembly 307 and a second drive motor 303 in driving connection with the second moving assembly 309. By controlling in an active manner, the rotation and bending of distal end 401 can be precisely controlled by the motor. An order of magnitude improvement in accuracy can be achieved compared to passive approaches.

As a specific example, on the basis of the foregoing, as shown in fig. 6, a coaxial rotary gear 306 is provided on the rotary outer surface of the hollow cylinder, and the output end of the second drive motor 303 is connected to a second gear connecting shaft 304 through a second coupling 302, and a second drive gear 305 is mounted on the second gear connecting shaft 304, and the second drive gear 305 is meshed with the rotary gear 306. Thus, the second driving motor 303 can drive the rotating gear 306 to rotate the hollow cylinder, thereby rotating the sheath body 400 and the distal end 401. As shown in fig. 8, the square slide block is connected with a rack, the output end of the first driving motor 311 is connected with a first gear connecting shaft 312 through a first coupler 310, a first driving gear 308 is arranged on the first gear connecting shaft 312, and the first driving gear 308 is meshed with the rack. Thus, the first driving motor 311 can control the linear motion of the square slider, and change the bending direction and angle of the distal end 401.

Of course, in other embodiments, as shown in fig. 9, the output end of the second driving motor 303 may be connected to the driving pulley 320, and the coaxial driven pulley 321 is disposed on the rotating outer surface of the hollow cylinder, where the driving pulley 320 and the driven pulley 321 are connected by the synchronous belt 323. In this way, the second driving motor 303 drives the hollow cylinder by adopting a synchronous belt transmission mode.

In addition to the above-mentioned solution, the first driving motor 311 may also drive the first moving component 307 through a mechanism that converts rotational motion into linear motion, such as a ball screw, and the second driving motor 303 may also drive the second moving component 309 through other rotation transmission mechanisms, which are not described herein.

The invention further discloses a ureter lithotripsy and stone extraction tool, which comprises any one of the ureter channel sheaths, a negative pressure device 200 and a liquid injection device, wherein the negative pressure device 200 is communicated with the stone extraction channel of the ureter channel sheath, and the liquid injection device is communicated with the flushing channel of the ureter channel sheath. Compared with the complex equipment in the prior art, the ureter lithotripsy and stone extraction tool only needs to prepare the ureter channel sheath, the negative pressure device and the liquid injection device. In addition, the assembly inserted into the patient in the operation is only provided with the ureteral channel sheath, and the negative pressure device and the priming device only need to be connected with the corresponding parts of the ureteral channel sheath in vitro, so that the operation instrument for executing ureteral lithotripsy is greatly simplified, and the operation difficulty of doctors is reduced. The ureter lithotripter stone-taking tool provided by the invention realizes the visual and adjustable operation process and has the negative pressure suction function, so that the integration of stone searching, lithotripter stone taking is realized, no additional instrument is needed, and the operation is convenient.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (10)

1. The ureteral channel sheath is characterized by comprising a sheath body and a control part, wherein the sheath body comprises a proximal end and a distal end which are opposite, the proximal end is connected with the control part, the control part can drive the sheath body to rotate around the axis of the sheath body, and the distal end of the sheath body can be driven to bend laterally;

the sheath tube is characterized in that a stone taking channel and a flushing channel which penetrate through the sheath tube in the length direction are arranged in the sheath tube body, an illumination component, an imaging component, a laser component, a stone taking channel opening and a flushing channel opening are arranged at the far end, the stone taking channel opening is communicated with the stone taking channel, and the flushing channel opening is communicated with the flushing channel.

2. The ureteral access sheath of claim 1, wherein the centers of at least three of the imaging component, the laser component, the lithotomy access opening, and the irrigation access opening are on the same circumference, the center of the circumference being on the axis of the sheath body.

3. The ureteral access sheath of claim 2, wherein the imaging component, the laser component, the lithotomy access opening, and the irrigation access opening are all disposed on the circumference with an included angle of 90 ° between adjacent ones.

4. The ureteral access sheath according to claim 1 or 2, characterized in that the laser component is arranged in the center of the distal end, the imaging component, the lithotomy access opening, the irrigation access opening being arranged around the laser component.

5. The ureteral access sheath according to claim 1, characterized in that the control component comprises a first movement assembly, the ureteral access sheath further comprising an elongated piece at least partially disposed within the sheath body, one end of the elongated piece being connected to the distal end, the other end of the elongated piece being connected to the first movement assembly; the first moving assembly is capable of reciprocating along the extending direction of the long fine member.

6. The ureteral access sheath according to claim 5, characterized in that the elongated piece comprises a first portion and a second portion connected, the second portion being arranged inside the sheath body and being movable along the axial direction of the sheath body, the second portion being connected to the control member, the first portion being arranged outside the sheath body, the first portion passing through a side wall of the sheath body and being connected to the distal end.

7. The ureteral access sheath according to claim 5, characterized in that the control component further comprises a second movement assembly, which is autorotatable about its axis, the axial end of the second movement assembly being connected to the proximal end.

8. The ureteral access sheath according to claim 7, characterized in that the second movement assembly is provided with a limiting structure arranged along the axis of the sheath body, and the first movement assembly is connected with the limiting structure and moves along the axis of the sheath body.

9. The ureteral access sheath of claim 7, wherein the control component further comprises a first drive motor drivingly connected to the first motion assembly and a second drive motor drivingly connected to the second motion assembly.

10. A ureter rubble stone-taking tool, which is characterized by comprising the ureter channel sheath, a negative pressure device, a liquid injection device and a laser generating device, wherein the negative pressure device is communicated with the stone-taking channel of the ureter channel sheath, the liquid injection device is communicated with the flushing channel of the ureter channel sheath, and the laser generating device is connected with a laser component of the ureter channel sheath.