CN115836836A - A guiding device and ureteroscope for ureteroscope - Google Patents

Abstract

Disclosed are a guiding device for a ureteroscope and the ureteroscope, wherein the ureteroscope includes: an operation portion, a tube lens main body having a front end portion and a rear end portion, a stone breaking mechanism, and a guide device. The tube lens main body includes: the suction channel is provided with a suction port at the front end. The guiding device is arranged in the suction channel and used for guiding out the broken stone entering the suction channel. The guiding device can divide the space in the suction channel, so that the crushed stone flowing into the suction channel can move backwards in order under the guiding effect of the guiding device, the crushed stone is prevented from being blocked in the suction channel, and the crushed stone guiding efficiency is improved in such a way.

Description

A guiding device and ureteroscope for ureteroscope

Technical Field

The application relates to the field of medical equipment, in particular to a guiding device for a ureteroscope, the ureteroscope and a method for removing calculus by using the ureteroscope.

Background

In recent years, ureteroscopes have been widely used for the treatment of urinary calculus diseases. Specifically, the ureteroscope can extend into the ureter or the kidney from the urethral orifice, and medical workers can observe the condition in the kidney and break stones at the target position by using the ureteroscope and matching with equipment such as image acquisition equipment and lighting equipment.

In practical application, in the process of beating the calculus through the ureteroscope, when the size of the calculus is large, the calculus is difficult to pulverize after being smashed to the broken stone with the equivalent diameter of about 2mm by the traditional ureteroscope, and the broken stone is difficult to be led out of a patient body through an effective leading-out mechanism. Therefore, after the calculus is crushed by the traditional ureteroscope, 60% -90% of the crushed calculus remains in the kidney and is difficult to be discharged out of the body in time by a natural discharging mode, and the discharge rate of the crushed calculus is low. The residual broken stone can form a stone street in the ureter to block the ureter, and the broken stone residue is one of the main reasons causing high recurrence rate of the stone.

To address this problem, ureteroscopy designs are proposed that are capable of removing the debris. In this design, the ureteroscope is provided with a rubble discharge mechanism to discharge the rubble in time to the outside of the body. However, in practical use, the crushed stone is easily clogged in the discharge mechanism of the ureteroscope and is difficult to be discharged to the outside of the patient.

Therefore, a new stone removal scheme is needed to avoid blockage of the crushed stone during removal.

Disclosure of Invention

An advantage of the present application is to provide a guiding device and ureteroscope for ureteroscope, wherein, the guiding device of ureteroscope can guide the rubble that is located in attracting the passageway and move backward to with it is external to attract the rubble in the passageway, improves rubble derivation efficiency.

Another advantage of the present application is to provide a guiding device and ureteroscope for ureteroscope, wherein, the guiding device plays the division effect to the space in inhaling the passageway, makes to flow into inhale the broken stone of passageway and move backward under its guide effect in order, in order to avoid the broken stone block up in inhale the passageway, through this way improve the broken stone and derive efficiency.

It is still another advantage of the present application to provide a guiding device for a ureteroscope and a ureteroscope, wherein through the reasonable layout of the filling port of the filling channel and the suction port of the suction channel, the design flexibility of the suction port and the filling port is relatively improved, and the size of the suction port and the filling port can be relatively increased, so that the crushed stone can more easily pass through to prevent the crushed stone from blocking the ureteroscope, and the liquid outlet amount of the filling port of the filling channel can be ensured.

To achieve at least one of the advantages described above, according to one aspect of the present application, there is provided a ureteroscope comprising:

an operation section;

a tube lens body having a front end and a rear end, comprising: a tube structure body, at least one perfusion channel extending within the tube structure body from the rear end to the front end; and a suction channel extending from the front end portion to the rear end portion within the tube structure body, the suction channel having a suction port at the front end portion, the operating portion being coupled to a rear end portion of the tube mirror body;

a lithotripsy mechanism disposed within the tubular body; and

and the guide device is arranged in the suction channel and is used for guiding out the broken stone entering the suction channel.

In the ureteroscope according to the present application, the guide device includes a guide main body provided in the suction passage, the guide main body includes a main body portion and at least one threaded guide wire formed on an outer peripheral side surface of the main body portion, and a screwing direction of the threaded guide wire coincides with a rotation direction of the guide main body.

In the ureteroscope according to the present application, the guide body extends from the front end portion to the rear end portion within the suction channel.

In a ureteroscope according to the present application, the guide body includes a flexible portion adjacent to the leading end portion and a rigid portion extending rearward from the flexible portion.

In the ureteroscope according to the present application, the tube structure body has a front end face, the suction port is formed at the front end face, and the front end of the guide body is flush with the front end face.

In the ureteroscope according to the present application, the guide body is disposed within the suction channel.

In the ureteroscope according to the present application, the threaded guide wire has a blade structure protrudingly formed on an outer peripheral side surface of the main body portion, and a screwing direction of the blade structure coincides with a rotation direction of the guide body.

In a ureteroscope according to the present application, the guiding device includes a driver coupled to the guiding body, the driver configured to drive the guiding body in rotation.

In the ureteroscope according to the present application, the guide device is detachably attached between the scope main body and the operation portion.

In the ureteroscope according to the present application, the guide device further includes a mounting carrier detachably mounted to the operation portion.

In the ureteroscope according to the application, the ureteroscope main part has preceding terminal surface and outer peripheral face, the filling channel has the infusion mouth that is located the front end portion, the infusion mouth is formed in the outer peripheral face of tubular structure main part, attract mouthful being formed in the preceding terminal surface of tubular structure main part.

In the ureteroscope according to the present application, the suction port is formed at the front end surface, wherein the front end surface of the tube structure body extends obliquely forward in an axial direction set by the scope body from a first side of the outer peripheral surface to a second side opposite to the first side.

According to another aspect of the present application, there is also provided a guide device for a ureteroscope, comprising:

the guide body comprises a main body part and at least one threaded guide wire formed on the outer peripheral side surface of the main body part, and the screwing direction of the threaded guide wire is consistent with the rotating direction of the guide body; and

a driver coupled to the guide body for driving the guide body to rotate.

Further objects and advantages of the present application will become apparent from an understanding of the ensuing description and drawings.

These and other objects, features and advantages of the present application will become more fully apparent from the following detailed description, the accompanying drawings and the claims.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the embodiments of the application do not constitute a limitation of the application. In the drawings, like reference numbers generally indicate like parts or steps.

Fig. 1 illustrates a schematic view of a ureteroscope according to an embodiment of the present application.

Fig. 2 illustrates a schematic view of a scope body of a ureteroscope according to an embodiment of the present application.

Fig. 3 illustrates a partial cross-sectional schematic view of a ureteroscope according to an embodiment of the present application.

Fig. 4A illustrates one of the partial schematic views of the scope body of a ureteroscope according to embodiments of the present application.

Fig. 4B illustrates a second partial illustration of a scope body of a ureteroscope according to an embodiment of the present application.

Fig. 4C illustrates a partial third illustration of a scope body of a ureteroscope according to an embodiment of the present application.

Figure 4D illustrates a partial illustration of a ureteroscope body of a ureteroscope according to an embodiment of the present application.

Fig. 5 illustrates a partial schematic view of a guide device according to an embodiment of the present application.

Fig. 6 illustrates a schematic view of a guide device according to an embodiment of the present application.

Fig. 7 illustrates another schematic view of a guide device according to an embodiment of the present application.

Fig. 8A illustrates one of the working process schematics of a ureteroscope according to an embodiment of the present application.

Fig. 8B illustrates a second schematic diagram of the operation of a ureteroscope according to an embodiment of the present application.

Fig. 8C illustrates a third schematic diagram of the working process of a ureteroscope according to an embodiment of the present application.

Figure 8D illustrates a fourth schematic process diagram of the operation of a ureteroscope, according to an embodiment of the present application.

Detailed Description

Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the present application and not all embodiments of the present application, and that the present application is not limited by the example embodiments described herein.

Summary of the application

As described above, when the size of a calculus is large in the process of hitting the calculus with a ureteroscope, it is difficult for a conventional ureteroscope to crush the calculus into a crushed stone having an equivalent diameter of about 2mm and then to pulverize the crushed stone, and it is difficult to lead the crushed stone out of the patient body by an effective lead-out mechanism. The broken stone residue is one of the main reasons causing high recurrence rate of the stones.

To address this problem, ureteroscopy designs are proposed that are capable of removing the debris. In this design, the ureteroscope is provided with a calculus discharge mechanism to discharge crushed calculus out of the body in time. However, in practical applications, the crushed stones are likely to be clogged in the discharge mechanism of the ureteroscope and are difficult to be discharged to the outside of the patient.

Specifically, in order to guide the crushed stones out, some ureteroscopes use the principle of negative pressure suction to suck the crushed stones into the discharge channel and discharge the crushed stones out of the body through the discharge channel. In practice, first, an optical fiber for breaking up the stone may be extended from the front end of the ureteroscope and emit a laser to break up the stone. The crushed stone is then sucked to the discharge opening into the discharge passage and is discharged. However, when a large amount of crushed stones enter the discharge passage at the same time, a large amount of crushed stones move in the same direction by the negative pressure suction effect, so that the crushed stones are easily blocked, and other crushed stones are prevented from entering or passing through the discharge passage, so that the crushed stones are difficult to be discharged, the crushed stones are discharged with low efficiency, and the operation time is long.

The idea that the inventor of this application solved rubble and derived efficiency problem does: a guide device is arranged in the channel for guiding the broken stones to guide the movement of the broken stones in the channel. Specifically, the guiding device divides the space in the suction channel, so that the crushed stones flowing into the suction channel move backwards in order under the guiding action of the guiding device, and the crushed stones are prevented from being blocked in the suction channel, and the crushed stone guiding efficiency is improved.

Based on this, the present application proposes a ureteroscope, which comprises: an operation unit; a tube lens body having a front end and a rear end, comprising: a tube structure body, at least one perfusion channel extending within the tube structure body from the rear end to the front end, a suction channel extending within the tube structure body from the front end to the rear end, the suction channel having a suction port at the front end; a lithotripsy mechanism disposed within the tubular body; and the guiding device is arranged in the suction channel and is used for guiding out the broken stone entering the suction channel.

Exemplary ureteroscope

As shown in fig. 1-8D, a ureteroscope 100 according to embodiments of the present application is illustrated. For convenience of explanation, the ureteroscope 100 will be described with reference to an example in which the ureteroscope 100 is applied to the treatment of a calculus c in a renal pelvis p.

The ureteroscope 100 may be used to examine the condition of the kidney, break up stones c within the renal pelvis p, and direct the discharge of broken stones (i.e., rubble). In an embodiment of the present application, the ureteroscope 100 includes a scope body 10 having a front end portion 110 and a rear end portion 120, a handle portion 20 operatively coupled to the rear end portion 120 of the scope body 10, and a guide device 40 for guiding a crushed stone.

In practical applications, the ureteroscope body 10 may be inserted into a ureter or a kidney from a urethra as an insertion portion of the ureteroscope 100, and an image capturing device 300 and a light source 400 may be disposed on the ureteroscope body 10 to capture images of the kidney and a stone located in the kidney. Preferably, the tube scope body 10 has a smooth outer surface, or the outer surface of the tube scope body 10 is smooth after entering the patient, so that the tube scope body 10 can smoothly enter the kidney. The operation portion 20, as a bridge connecting the ureteroscope 100 and an external device, can be communicably connected to an image output device 500 (e.g., a computer communicably connected to the image acquisition device 300) to acquire images of the kidney and stones located in the kidney, thereby facilitating a user to observe the condition of stones c in the renal pelvis p. Further, the operable members (e.g., the lithotripsy mechanism 200, the guide mechanism 600, the injection device 700, the suction device 800) can be operated by other functions of the operation portion 20. For example, the calculus c in the renal pelvis p is hit by the calculus breaking mechanism 200 which enters the tube lens body 10 through the operation portion 20, and, for example, the calculus in the kidney is sucked by the suction device 800 which communicates with the tube lens body 10 through the operation portion 20.

Specifically, the tube mirror body 10 includes a tube structure body 11, at least one perfusion channel 12, and a suction channel 13. The at least one priming channel 12 extends within the tubular structure body 11 from the rear end 120 to the front end 110, and the suction channel 13 extends within the tubular structure body 11 from the front end 110 to the rear end 120. Also, it is preferable that the perfusion channel 12 and the suction channel 13 are independent from each other, so that the introduction of the fluid into the kidney through the perfusion channel 12 to impact crushed stones and the suction of the fluid with the crushed stones entrained therein to the suction channel 13 can be performed simultaneously, and the interference between the impact crushed stones and the suction of the crushed stones can be avoided.

The at least one perfusion channel 12 has at least one perfusion port 121 at the front end portion 110 and at least one first operation port 122 in communication with the at least one perfusion port 121, and fluid can pass from the perfusion port 121 to the kidney and impact debris in the kidney. The suction channel 13 has a suction port 131 at the distal end portion 110 and a second operation port 132 communicating with the suction port 131, and when the fluid carrying the crushed stone reaches the vicinity of the suction port 131, the fluid is sucked to the suction port 131 and enters the suction channel 13 from the suction port 131 to form a water return loop. That is, the crushed stones may enter the suction channel 13 from the suction port 131 by a water recirculation loop.

Accordingly, the operation portion 20 includes an operation body 21, a first operation end 22 provided to the operation body 21 and communicating with the perfusion channel 12, and a second operation end 23 provided to the operation body 21 and communicating with the suction channel 13. The operation portion 20 communicates with the perfusion channel 12 through the first operation end 22 communicating with the first operation port 122, and communicates with the suction channel 13 through the second operation end 23 communicating with the second operation port 132. The first operation end 22 is adapted to be connected with a fluid injection device 700 and allow the fluid injection device 700 to inject fluid into the renal pelvis p through the perfusion channel 12 to impact crushed stones, and the second operation end 23 is adapted to be connected with a suction device 800 (e.g., an air pump) and allow the suction device 800 to suck the fluid and crushed stones near the suction channel 13 through the suction channel 13. In order to control the negative pressure in the suction channel 13, in one embodiment of the present application, the operation part 20 further includes a negative pressure regulator 27, and the negative pressure regulator 27 is configured to regulate the air pressure in the suction channel 13, as shown in fig. 1.

It should be understood that the roles of the first operating end 22 and the second operating end 23 are not intended to limit the present application. The first operating end 22 and the second operating end 23 are also adapted to allow other devices to perform other functional operations. For example, the first manipulation end 22 is adapted to allow a guide mechanism 600 to pass through the perfusion channel 12 and guide the scope body 10 to a target location. It should also be understood that the operating portion 20 may also include other operating ends to allow other devices to perform other functional operations.

In practice, the lithotripsy mechanism 200 may reach into the kidney and break up concretions c. During the crushing of the stones c by the lithotripsy mechanism 200, the perfusion channel 12 can direct the fluid to exit from the perfusion opening 121 thereof to impact the crushed stones and to entrain the crushed stones. The air pressure in the suction passage 13 is in a negative pressure state, so when the fluid carrying crushed stone moves to a position close to the suction port 131, the fluid and crushed stone will be sucked, and the crushed stone is guided to the suction port 131 under the action of the fluid impact and the negative pressure suction. However, when a large amount of crushed stones enter the suction passage 13 at the same time, the large amount of crushed stones move in the same direction, easily clog the suction passage 13, and are difficult to move backward again. As described above, not only the crushed stone jammed in the jammed section of the suction passage 13 is difficult to be discharged, but also the crushed stone located in front of the jammed section of the suction passage 13 is jammed in the suction passage 13 or outside the suction passage 13 due to at least one section of the suction passage 13 being jammed, and the more and more crushed stone is deposited in the suction passage 13 to form a stone street, which is difficult to be discharged, the discharge efficiency of the crushed stone is low, and the operation time is long.

In particular, in the embodiment of the present application, a guide device 40 for guiding the crushed stones is provided in the suction passage 13 to prevent the crushed stones in the suction passage 13 from being blocked, so as to improve the efficiency of guiding the crushed stones. Specifically, as shown in fig. 3 and 5, the guiding device 40 includes a guiding body 41 disposed in the suction channel 13, and the guiding body 41 includes a main body 411 and at least one threaded guiding wire 412 formed on an outer peripheral side surface of the main body 411.

In the embodiment of the present application, the screwing direction of the threaded guide wire 412 coincides with the rotation direction of the guide body 41. For example, the threaded guide wire 412 is a clockwise spiral wire, that is, the threaded guide wire 412 extends forward in a clockwise direction, and the rotation direction of the guide body 41 is set to rotate clockwise; for another example, the thread guiding wire 412 is a counterclockwise spiral wire, that is, the thread guiding wire 412 extends forward along a counterclockwise direction, and the rotation direction of the guiding body 41 is set to be counterclockwise.

In a modified embodiment of the present application, the screwing direction of the threaded guide wire 412 may be set to be opposite to the rotation direction of the guide body 41, and this is not a limitation of the present application.

It should be noted that the thread guide wire 412 protrudes from the outer peripheral side surface of the guide body 41, and divides the space between the suction channel 13 and the guide body 41 into a plurality of subspaces, so that the crushed stones in the suction channel 13 are orderly arranged in the suction channel 13 and are guided out along with the rotation of the guide body 41, thereby avoiding the occurrence of blockage.

Further, in some embodiments of the present application, the guide body 41 may perform full-stroke guiding on the crushed stone in the suction channel 13, that is, the guide body 41 may guide the crushed stone entering the suction channel 13 from the front of the suction channel 13 to the rear of the suction channel 13, or the guide body 41 may guide the crushed stone in the front, middle and rear of the suction channel 13. Accordingly, in some embodiments of the present application, the guide body 41 extends within the suction channel 13 from the front end 110 to the rear end 120 to provide full travel guidance of the debris within the suction channel 13.

In one specific example of the present application, the guide body 41 may perform full-stroke guide of the crushed stone in the suction passage 13. Specifically, the pipe structure body 11 has a front end face 1101 and an outer peripheral surface 1102, the suction port 131 is formed in the front end face 1101, and the front end of the guide body 41 is flush with the front end face 1101. The rear end of the guide body 41 extends from the front end of the guide body 41 to the rear of the suction passage 13, and the whole stroke of the crushed stone is guided. Of course, in other specific examples of the present application, the front end of the guide body 41 may be lower than the front end surface 1101, and this is not a limitation of the present application.

In some other embodiments of the present application, the guiding body 41 guides the crushed stone in the suction channel 13 only by half stroke, that is, the guiding body 41 can guide the crushed stone entering the suction channel 13 from a first preset area to a second preset area of the suction channel 13, and a portion of the suction channel 13 from the first preset position to the second preset area is only a part of the suction channel 13, or the guiding body 41 can guide the crushed stone in the local area of the suction channel 13. Accordingly, in some other embodiments of the present application, the guiding body 41 is located in a local area of the suction channel 13, for example, the guiding body 41 is located in front of the suction channel 13, and can guide the gravel entering the first preset position in front of the suction channel 13 to the second preset position behind the first preset position, and the gravel can continue to move backwards by inertia and the backward suction force in the suction channel 13.

The position of the guide body 41 may be designed according to practical applications, for example, in practical applications, when the crushed stone is easily blocked in the middle of the suction passage 13, the guide body 41 may be provided only in the middle of the suction passage 13; when the crushed stone is easily clogged at the rear portion of the suction passage 13, the guide body 41 is provided only at the rear portion of the suction passage 13, which is not limited by the present application.

In a specific example of the present application, the guiding body 41 is designed to be telescopically arranged in the suction channel 13, so that the position of the guiding body 41 in the suction channel 13 can be adjusted according to practical application conditions to dredge and guide the broken stone in the blocked section of the suction channel 13. In other specific examples, the guiding body 41 is designed to be non-telescopically disposed in the suction channel 13, and the application is not limited thereto.

It is worth mentioning that, in order to ensure the stiffness of the tube lens main body 10 while ensuring that the tube lens main body 10 can be bent to reach different target positions, the tube lens main body 10 includes a bent portion 1010 adjacent to the front end portion 110 and a support portion 1020 coupled to the bent portion 1010. The support portion 1020 may extend backward from the bending portion 1010, or the support portion 1020 covers at least a portion of the bending portion 1010 to ensure local stiffness of the tube lens main body 10.

In a specific example, at least a part of the front end portion 110 of the scope body 10 is a bendable bent portion 1010 so that the perfusion channel 12 and the suction channel 13 can be bent, and the suction port 131 and the perfusion port 121 can be directed toward the calculi c at the target position. The bending portion 1010 includes an active bending portion 1011 and a passive bending portion 1012, the active bending portion 1011 being bendable by a manipulation of the operating portion 20 and maintaining a bent state, the passive bending portion 1012 being bent in accordance with the bending of the active bending portion 1011.

The operation portion 20 further comprises a third operation end 24 operatively connected to the bending portion 1010 and an operation mechanism 28 mounted on the third operation end 24, wherein the operation mechanism 28 is operatively connected to the bending portion 1010 through the third operation end 24 to control the bending degree of the bending portion 1010, so that the endoscope main body 10 can reach different target positions, and the bending degree of the bending portion 1010 can be adjusted according to actual conditions. In one specific example, the operating mechanism 28 includes a control wire 281 coupled to the bending portion 1010 and an adjuster 282 coupled to the control wire 281, the adjuster 282 configured to drive the control wire 281 to pull the bending portion 1010 to bend the bending portion 1010. The structure of the operating mechanism 28 and the manner of controlling the bending of the bending portion 1010 are not limited in this application, i.e., the operating mechanism 28 can be designed in other structures and control the bending of the bending portion 1010 in other manners.

Accordingly, when the guide body 41 can perform the full-stroke guide of the crushed stone in the suction passage 13, a portion of the guide body 41 adjacent to the front end portion 110 has flexibility to accommodate the bending of the bending portion 1010. In the present embodiment, the guiding body 41 comprises a flexible portion 401 adjacent to the front end portion 110 and a rigid portion 402 extending backwards from the flexible portion 401, the flexible portion 401 being adapted to be bent such that the guiding body 41 is bent therewith during bending of the tube scope body 10.

As shown in fig. 3, in the embodiment of the present application, the guide body 41 is disposed in the suction passage 13, that is, the guide body 41 is not in contact with the inner peripheral wall of the suction passage 13, so as to sufficiently exert the guiding function of the guide body 41, so that the entire side portion of the guide body 41 guides the crushed stone in the suction passage 13.

Further, the guide body 41 is located in a middle region of the suction passage 13. Here, the central region of the suction passage 13 refers to a region of the suction passage 13 formed around the central axis in the axial direction thereof. Preferably, the guide body 41 is arranged coaxially with the suction channel 13, i.e. the central axis of the guide body 41 coincides with the central axis of the suction channel 13. In this way, the crushed stones are relatively uniformly distributed between the suction channel 13 and the guide main body 41, so that the crushed stones around the guide main body 41 fully utilize the space around the guide main body 41 and the centrifugal force generated by the guide main body 41, and are further led out more quickly, thereby improving the efficiency of leading out the crushed stones.

In the present embodiment, the rotation axis and the central axis of the guide body 41 are coaxial. It will be understood by those skilled in the art that the smaller the centrifugal force applied to the crushed stones closer to the rotational axis of the guide body 41, the smaller the centrifugal force applied to the crushed stones farther from the rotational axis of the guide body 41, the harder they are to be carried. When the distance from the guide body 41 is greater than the maximum acting distance of the guide body 41, the crushed stone is difficult to be carried. When the distance between the guide body 41 and a partial peripheral wall of the inner peripheral wall of the suction channel 13 is smaller than the maximum acting distance of the guide body 41, the space between the guide body 41 and the partial peripheral wall of the suction channel 13 and the centrifugal force generated by the guide body 41 may not be fully utilized.

It will also be appreciated that the clearance between the guide body 41 and the suction channel 13 will influence the guiding effect of the guide body on the crushed stone in the suction channel 13. When the clearance between the guide body 41 and the inner peripheral wall of the suction passage 13 is excessively large, the crushed stone having a large distance from the rotation axis of the guide body 41 is less urged by the guide body 41 and is less likely to be moved rearward by the guide body 41; when the clearance between the guide main body 41 and the inner circumferential wall of the suction passage 13 is excessively small, clogging is likely to occur between the guide main body 41 and the inner circumferential wall of the suction passage 13. The crushed stone between the guide body 41 and the inner circumferential wall of the suction channel 13 can be designed according to the actual situation and should not be too large or too small.

It should be noted that, in the embodiment of the present application, the threaded guide line 412 protrudes from the main body portion 411 of the guide main body 41, so that, compared to the main body portion 411, the distance between the threaded guide line 412 and the inner peripheral wall of the suction channel 13 is smaller, and when the crushed stone passes through the threaded guide line 412 and the size of the crushed stone is larger than the gap between the threaded guide line 412 and the inner peripheral wall of the suction channel 13, the crushed stone is squeezed and further crushed, so that the crushed stone with smaller size is formed, and the crushed stone can more easily pass through the suction channel 13.

Further, in a specific example of the present application, the thread guide wire 412 has a blade structure convexly formed at an outer circumferential side surface of the main body portion 411 to cut crushed stones between an inner circumferential wall of the suction passage 13 and the guide body 41 during rotation of the guide body 41. Specifically, the screwing direction of the blade structure is the same as the rotating direction of the guide body 41, so that the crushed stone can be prevented from splashing, and therefore, when the crushed stone moves backwards, the crushed stone can be cut by the blade structure and can be more easily chipped, the size of the chipped crushed stone is smaller, the crushed stone can more easily pass through the suction channel 13, and the crushed stone guiding efficiency can be improved.

As shown in fig. 3 and 6, in the embodiment of the present application, the guiding device 40 further includes a driver coupled to the guiding body 41, and the driver is configured to drive the guiding body 41 to rotate. Preferably, the drive is isolated from debris and fluid to avoid fluid and debris interfering with the proper operation of the drive. In a specific example, the driver extends through the suction channel 13, and the ureteroscope 100 further includes a sealing member 17 disposed between the suction channel 13 of the ureteroscope body 10 and the guide device 40 to prevent fluid and crushed stone in the suction channel 13 from flowing into the driver of the guide device 40 and affecting the function of the guide device 40.

As shown in fig. 7, the guide device 40 further includes a mounting carrier 43, the driver is mounted on the mounting carrier 43, and the mounting carrier 43 is mounted on the operating portion 20. The mounting carrier 43 may be fixed to the operation unit 20 so that the guide device 40 is fixed between the tube lens main body 10 and the operation unit 20, and the mounting carrier 43 may be detachably attached to the operation unit 20 so that the guide device 40 is detachably attached between the tube lens main body 10 and the operation unit 20. In one specific example, the guiding device 40 is detachably mounted between the tube lens main body 10 and the operation portion 20 through the mounting carrier 43, and the mounting carrier 43 includes at least one connection structure 431341, such as a snap, so that the mounting carrier 43 is detachably mounted on the operation portion 20.

In the embodiment of the present application, the tube mirror body 10 further includes a fiber channel 14 extending from the front end portion 110 to the rear end portion 120 in the tube structure body 11, and the fiber channel 14 includes a fiber channel opening 141 formed in the front end portion 110 and a third operation port 142 formed in the rear end portion 120. The fiber channel 14 may be isolated from other channels or may be connected to other channels, which is not limited in this application.

The fiber channel 14 is adapted to allow passage of operable components, for example, the fiber channel 14 allows passage of a device for striking stones. Accordingly, in one particular example of the present application, the ureteroscope 100 further includes a lithotripsy mechanism 200 for striking stones. The lithotripsy mechanism 200 may be fixed within the fiber channel 14 or may be movably mounted within the fiber channel 14, although not limiting.

In one specific example of the present application, the lithotripter mechanism 200 is telescopically disposed in the fiber channel 14, and the lithotripter mechanism 200 is extendable and retractable from the fiber channel opening 141 within the fiber channel 14. In this specific example, the optical fiber passage 14 communicates with the suction passage 13, and the suction port 131 of the suction passage 13 is a common opening of the suction passage 13 and the optical fiber passage 14, that is, the suction port 131 may be used as the optical fiber passage opening 141, and the debris mechanism 200 may be extended or retracted from the suction port 131.

In another specific example of the present application, the lithotripsy mechanism 200 is movable relative to the central axis of the suction port 131, movable within the optical fiber passage 14 in a direction approaching the central axis of the suction port 131, or movable within the optical fiber passage 14 in a direction away from the central axis of the suction port 131.

The lithotripsy mechanism 200 can be implemented as a holmium laser that generates energy from the laser that causes water between the stone c and the holmium laser to form a micro-cavitation bubble and transfer the energy to the stone c to hit the stone c. During the process that the holmium laser strikes the calculus c, a large amount of energy is absorbed by water, and damage to tissues around the calculus c caused by the holmium laser can be reduced.

Correspondingly, the operation portion 20 further comprises a fourth operation end 25 communicated with the optical fiber channel 14, and the operation portion 20 is communicated with the optical fiber channel 14 through the fourth operation end 25 communicated with the third operation port 142, so as to allow the lithotripsy mechanism 200 to enter the optical fiber channel 14 through the operation portion 20 and further enter the kidney to hit the calculi c.

In the embodiment of the present application, the perfusion channel 12, the suction channel 13 and the optical fiber channel 14 are not limited to be formed in the manner of the present application. The perfusion channel 12, the suction channel 13 and the optical fiber channel 14 may be formed by a plurality of holes formed in the tube structure body 11 itself, or may be formed by a plurality of hollow tubes cooperatively, which is not limited in this application.

As previously mentioned, during the striking of a stone c by the lithotripsy mechanism 200, the irrigation passage 12 may direct fluid exiting from its irrigation port 121 to impact the stone and entrain the stone for movement. The air pressure in the suction passage 13 is in a negative pressure state, and therefore, when the fluid carrying the crushed stone moves to a position near the suction port 131, the fluid and the crushed stone are sucked to the suction passage 13. However, the fluid may be disturbed by the suction force in the suction channel 13 during the impact with the crushed stone.

In particular, in some specific examples of the present application, the relative position relationship between the perfusion port 121 and the suction port 131 is adjusted, and the flow direction of the fluid is controlled to reduce the suction interference on the fluid, so as to improve the calculus c leading-out efficiency. The perfusion port 121 of the perfusion channel 12 has a first orientation for allowing fluid to be injected along the perfusion channel 12 from the perfusion port 121 into the renal pelvis p in a first direction in which the first orientation is directed, and the suction port 131 of the suction channel 13 has a second orientation at a preset angle to the first orientation for allowing the fluid to be sucked from the suction port 131 into the suction channel 13 in a second direction in which the second orientation is directed after being deflected within the renal pelvis p to form a fluid return loop.

The second orientation is different from the first orientation, the first orientation is the same as the first orientation, and the second orientation is opposite to the second orientation, so that an included angle between the first orientation and the second orientation is not 0 ° or 180 °, that is, the first orientation and the second orientation are different from each other and are not opposite to each other. Therefore, the fluid emitted from the filling port 121 along the first direction is turned and then flows back along the second direction having an included angle with the first direction to form a vortex-type fluid return ring, so that the fluid can be prevented from directly flowing back along the opposite direction of the first direction to the suction port 131 facing the same direction as the filling port 121 after being emitted from the filling port 121 along the first direction, and the interference of the negative pressure in the suction channel 13 on the fluid is further reduced.

It should be noted that, in other specific examples of the present application, the first orientation and the second orientation may be the same, and the first direction and the second direction may also be the same or opposite, which is not limited in this application.

In an embodiment of the present application, an included angle between the first direction and the second direction is greater than or equal to 90 ° and less than 180 °. In a specific example, the second direction is parallel to or infinitely close to the axial direction set by the tube lens body 10, the angle between the first direction and the axial direction set by the tube lens body 10 is greater than 0 ° and less than or equal to 90 °, and correspondingly, the angle between the first direction and the second direction is greater than or equal to 90 ° and less than or equal to 180 °. In another specific example, the first direction is parallel to or infinitely close to the axial direction set by the tube lens body 10, the angle between the second direction and the axial direction set by the tube lens body 10 is greater than 0 ° and less than or equal to 90 °, and accordingly, the angle between the first direction and the second direction is greater than or equal to 90 ° and less than or equal to 180 °.

In one embodiment of the present application, an included angle between the central axis of the perfusion opening 121 and the central axis of the suction opening 131 is greater than 0 ° and less than or equal to 90 °, so that the first direction and the second direction form a preset included angle.

In the embodiment of the present application, the perfusion opening 121 and the suction opening 131 are not flush in the set axial direction of the tube lens main body 10, so that the distance between the perfusion opening 121 and the suction opening 131 and the movement path of the fluid can be extended, which not only can reduce the interference of the suction of the negative pressure in the suction channel 13 to the fluid, but also can improve the efficiency of leading out the crushed stone because the fluid flows through a wider area and the fluid can carry more crushed stones on the movement path of the fluid relatively.

Here, the fact that the perfusion opening 121 and the suction opening 131 are not flush with each other in the set axial direction of the tube lens body 10 means that the perfusion opening 121 and the suction opening 131 have a difference in height in the set axial direction of the tube lens body 10, and the distances between the perfusion opening 121 and the suction opening 131 and the front end point located at the forefront of the tube lens body 10 are different from each other. In a specific example, the distance between the infusion port 121 and the front end point of the tube lens body 10 is greater than the distance between the suction port 131 and the front end point of the tube lens body 10, that is, the suction port 131 is located in front of the infusion port 121 in the axial direction set by the tube lens body 10, and the suction port 131 is closer to the front end point of the tube lens body 10 than the infusion port 121. In another specific example, the distance between the perfusion port 121 and the front end point of the tube mirror body 10 is smaller than the distance between the suction port 131 and the front end point of the tube mirror body 10, that is, the perfusion port 121 is located in front of the suction port 131, and the perfusion port 121 is closer to the front end point of the tube mirror body 10 than the suction port 131.

In a modified embodiment of the present application, the perfusion port 121 and the suction port 131 may be flush with each other in the axial direction set by the tube lens body 10, and this is not a limitation of the present application.

In the present embodiment, the perfusion port 121 and the suction port 131 are two isolated openings, so as to reduce the suction interference of the fluid caused by the negative pressure in the suction channel 13. In some embodiments of the present application, the infusion port 121 and the suction port 131 are located on two different sides, respectively.

In a specific example of the present application, the infusion port 121 is formed in the outer peripheral surface 1102 of the tube structure body 11, and the suction port 131 is formed in the front end surface 1101 of the tube structure body 11, as shown in fig. 4A to 4D. Thus, the perfusion opening 121 is opened laterally, the suction opening 131 is opened forward, and the fluid is injected into the renal pelvis p from the perfusion opening 121 formed on the outer circumferential surface 1102 of the tube structure body 11 in the first direction, and is diverted to be sucked into the suction channel 13 from the suction opening 131 in the second direction bypassing the outer circumferential surface 1102, so as to form a vortex-type fluid loop, thereby reducing the suction interference to the fluid.

In particular, in this specific example, the pouring port 121 formed in the outer peripheral surface 1102 of the pipe structural body 11 mainly occupies the axial dimension of the pipe structural body 11, and the suction port 131 formed in the front end surface 1101 of the pipe structural body 11 mainly occupies the radial dimension of the pipe structural body 11. In this way, without coordinating the space ratio occupied by the pouring port 121 and the suction port 131 in the radial direction of the tubular structure body 11 under the condition that the radial dimension of the tubular structure body 11 is limited, the sizes of the suction port 131 and the pouring port 121 can be relatively increased, and the flexibility in designing the shapes and the number of the suction port 131 and the pouring port 121 is relatively improved. Through reasonable arrangement of the perfusion openings 121 and the suction openings 131, the sizes of the suction openings 131 and the perfusion openings 121 can be relatively increased, so that broken stones can pass through the ureteroscope 100 more easily to prevent the broken stones from being blocked by the ureteroscope 100, and the liquid outlet amount of the perfusion openings 121 of the perfusion channels 12 is ensured.

When the liquid output of the pouring opening 121 is large, on one hand, the range of the fluid emitted from the pouring opening 121 is relatively prolonged, the impact force on the crushed stones is relatively increased, the attracted interference is relatively weakened, and the lead-out efficiency of the crushed stones is relatively improved. On the other hand, the ureteroscope 100 can achieve a large liquid outlet amount under a relatively low liquid injection pressure, and the risk of pressure rise in the kidney is reduced.

It is worth mentioning that in the embodiment of the present application, the front end face 1101 of the tubular structural body 11 is designed to: extends obliquely forward from a first side of the outer peripheral surface 1102 to a second side opposite to the first side in an axial direction set by the tube lens body 10. For example, the front end surface 1101 of the tube structure body 11 extends obliquely forward from a lower side set by the outer peripheral surface 1102 to an upper side opposite to the lower side in the axial direction set by the tube mirror body 10, as shown in fig. 4A.

Specifically, the front end surface 1101 may be designed as a convex slope, a concave slope, a wave slope, and other types of slopes formed between the first side and the second side of the outer peripheral surface 1102, which is not limited in this application. In a specific example of the present application, the front end surface 1101 is designed as a wave-shaped slope surface depressed in the middle between the first side and the second side of the outer peripheral surface 1102.

It should be understood that, in other embodiments, the front end face 1101 of the tubular main body 11 may also be designed such that the front end face 1101 of the tubular main body 11 extends flush along the axial direction set by the mirror main body 10 from a first side of the outer peripheral surface 1102 to a second side opposite to the first side (i.e., an end of the front end face 1101 close to the first side of the suction channel 13 is flush with an end thereof close to the second side of the suction channel 13 in the axial direction), and this is not a limitation of the present application.

Further, the suction port 131 is formed in the distal end surface 1101, and the suction port 131 extends obliquely forward in the axial direction set by the tube lens body 10 from a first side of the suction passage 13 to a second side opposite to the first side, wherein the first side of the outer peripheral surface 1102 corresponds to the first side of the suction passage 13, and the second side of the outer peripheral surface 1102 corresponds to the second side of the suction passage 13.

It is worth mentioning that when the front end surface 1101 is designed to extend obliquely forward in the axial direction set by the tube main body 10 from the first side to the second side of the outer peripheral surface 1102, the fluid detour path is extended, not only is the suction interference received relatively reduced, but also, since the region through which the fluid flows is wider, more crushed stone can be entrained on the fluid movement path, and the crushed stone discharge efficiency can be improved, compared with the case where the front end surface 1101 of the tube main body 11 extends flush in the axial direction set by the tube main body 10 from the first side of the outer peripheral surface 1102 to the second side opposite to the first side.

Furthermore, the front end face 1101 is designed to: when the suction port 131 extends obliquely forward in the axial direction set by the tube lens body 10 from a first side of the outer peripheral surface 1102 to a second side opposite to the first side, a relatively large distribution space is provided for the suction port 131, and accordingly, the size of the suction port 131 is relatively increased, so that more crushed stone can be allowed to pass through the suction passage 13, the suction port 131 is prevented from being clogged with the crushed stone, and the crushed stone discharge efficiency is improved.

Preferably, the diameter of the perfusion channel 12 is equal to or slightly larger than the diameter of the suction channel 13 to achieve flow balance. Here, the diametrical size of the perfusion channel 12 equal to or slightly larger than the diametrical size of the suction channel 13 means: the sum of the equivalent diameters of all the perfusion channels 12 is equal to or slightly greater than the sum of the equivalent diameters of all the suction channels 13.

In one embodiment of the present application, the number of the suction ports 131 is 1, and the number of the pouring ports 121 is 2. Correspondingly, the at least one perfusion channel 12 comprises a first perfusion channel having a first perfusion opening at the front end portion 110 and a second perfusion channel having a second perfusion opening at the front end portion 110, the first and second perfusion openings being oppositely arranged.

It should be understood that the size, shape and number of the suction ports 131 and the perfusion ports 121 are not limited to the present application, and the size, shape and number of the suction ports 131 and the perfusion ports 121 can be adjusted according to the actual application to realize controllable and ordered fluid loops.

It should be noted that the positions of the suction port 131 and the perfusion port 121 are not limited to the present application, and in other specific examples, the suction port 131 and the perfusion port 121 may be disposed at other positions. In another specific example of the present application, the suction port 131 and the infusion port 121 are provided in the outer peripheral surface 1102 and the leading end surface, respectively.

In yet another specific example of the present application, the suction port 131 and the infusion port 121 are both provided to the front face 1101 of the tube structure body 11. Specifically, in this particular example, the at least one perfusion channel 12 includes a first perfusion channel having a first perfusion port at the front end portion 110 and a second perfusion channel having a second perfusion port at the front end portion 110, the first and second perfusion ports being on opposite sides of the suction port 131.

In the present embodiment, the ureteroscope 100 further includes an image capture device 300 and a light source 400 mounted to the scope body 10 to capture images of the kidney and stones located within the kidney. The positions of the image capturing apparatus 300 and the light source 400 are not limited by the present application, and preferably, the suction port 131 of the suction channel 13 is located in the visible area of the image capturing apparatus 300 to capture the situation near the suction port 131, so that the user can observe the derived situation of the crushed stone. The light source 400 may be disposed near the image pickup device 300 to provide a sufficient amount of light to the image pickup device 300.

Accordingly, the operation section 20 further includes a fifth operation terminal 26 communicably connected to the image capturing apparatus 300. Also, the image output device 500 (e.g., a computer communicably connected to the image capturing device 300) may be communicably connected to the image capturing device 300 through the operating portion 20 to acquire images of the kidney and the stone located in the kidney, so that the user can observe the condition of the stone c in the renal pelvis p.

Exemplary guide device

As shown in fig. 1-8D, a guide device 40 for a ureteroscope according to the present application is illustrated. The guiding device 40 can be used for guiding the broken stones in the ureteroscope 100 to move backwards in order, and the guiding device 40 comprises: a guide body 41 and a driver coupled to the guide body 41, the guide body 41 comprising: a main body 411 and at least one thread guide wire 412 formed on an outer peripheral side surface of the main body 411, wherein a screwing direction of the thread guide wire 412 coincides with a rotation direction of the guide body 41. The driver is used to drive the guide body 41 to rotate. The guiding device 40 further comprises a mounting carrier 43, the driver being mounted to the mounting carrier 43, the mounting carrier 43 being adapted to be mounted to the operation portion 20 of the ureteroscope 100.

In a specific example of the present application, the guide body 41 comprises a flexible portion 401 adjacent to the front end portion 110 and a rigid portion 402 extending rearwardly from the flexible portion 401, the flexible portion 401 being adapted to be bent.

In a specific example of the present application, the thread guide wire 412 has a blade structure protrudingly formed on an outer circumferential side surface of the main body portion 411, and a screwing direction of the blade structure coincides with a rotation direction of the guide body 41.

Here, it will be understood by those skilled in the art that the specific function and operation of the guide device 40 have been described in detail in the above description of the ureteroscope 100 with reference to fig. 1 to 8D, and thus, a repetitive description thereof will be omitted.

Exemplary methods of removing calculus

The present application also provides a method of removing calculus with a ureteroscope, comprising: s110, smashing the calculus; s120, guiding the broken stone to enter a suction channel through a fluid return ring; and S130, discharging the crushed stone out of the body through a guide device arranged in the suction channel.

The operation of the ureteroscope 100 will be described below by taking the example of the application of the ureteroscope 100 to the removal of a stone c in a renal pelvis p.

In step S110, the stone is crushed. Preparation is required before the stone is hit by the emitted laser light. Specifically, first, the tube lens body 10 can be inserted to an initial predetermined position. Specifically, the scope body 10 may be advanced along the patient's ureter into the kidney and to an initial predetermined location. In this process, an image of the surrounding environment where the tube lens body 10 passes can be collected and displayed by the image collecting device 300 provided to the tube lens body 10 and the image output device 500 communicably connected to the image collecting device 300, and the tube lens body 10 is guided to the initial predetermined position in cooperation with the guide mechanism 600. Specifically, the guide mechanism 600 can enter the perfusion channel 12 through the operation portion 20 and guide the scope body 10 to the initial predetermined position, and after the scope body 10 reaches the initial predetermined position, the guide mechanism 600 can be removed.

The lithotripsy mechanism 200 may be placed in the initial predetermined position of the kidney prior to insertion of the scope body 10 or after insertion of the scope body 10. Specifically, the lithotripter mechanism 200 is disposed in the optical fiber channel 14 and extends or retracts from the front end portion 110 of the tube lens body 10.

Then, the bending portion 1010 is controlled to bend by the operating mechanism 28 of the operating portion 20, so that the distal end portion 110 of the scope body 10 can be directed toward the stone c at the target position within the renal pelvis p. The front end portion 110 of the scope body 10 is directed to the calculus c at the target position in the renal pelvis p, and then the calculus is crushed by the laser emitted from the lithotripsy mechanism 200.

In controlling the bending of the bending portion 1010 by the operating mechanism 28 of the operating portion 20, the bending portion 1010 may be controlled to be bent at a desired degree of bending according to a target position. The curved portion 1010 is controlled to bend at a first curvature when the ureteroscope 100 is used to hit a stone c located in the suprarenal pelvis, the curved portion 1010 is controlled to bend at a second curvature when the ureteroscope 100 is used to hit a stone c located in the mesorenal pelvis, and the curved portion 1010 is controlled to bend at a third curvature when the ureteroscope 100 is used to hit a stone c located in the infrarenal pelvis, the third curvature being greater than the second and first curvatures.

It should be mentioned that, in the process of striking the calculus c by the calculus-breaking mechanism 200, the tube lens main body 10 can be rotated, so that the calculus-breaking mechanism 200 can strike the calculus in multiple directions, and the fluid emitted from the perfusion opening 121 can impact the calculus around the tube lens main body 10 comprehensively.

In step S120, the crushed stone is guided into the suction passage 13 by the fluid return ring. Specifically, during striking of the stone c by the lithotripsy mechanism 200, or after striking of the stone c by the lithotripsy mechanism 200, a fluid may be ejected from the irrigation port 121 of the ureteroscope 100 to a target location to impact the stone. Specifically, fluid may be injected into the perfusion channel 12 through the injection device 700 connected to the operating portion 20, and the fluid may be injected to a target position to impact crushed stones.

As shown in fig. 8A, during the process of crushing the stone, the crushed stone and the fluid can be sucked, so that the fluid is sucked into the suction channel 13 of the ureteroscope 100 from the suction port 131 of the ureteroscope 100 after being deflected to form a fluid return loop, and the crushed stone is guided to the suction port 131 by the fluid return loop and enters the suction channel 13 from the suction port 131. Specifically, crushed stones and fluid may be sucked by the suction apparatus 800 connected to the operation portion 20 so that the fluid and crushed stones are discharged through the suction passage 13 to maintain the pressure in the kidney. In the process of sucking the crushed stone into the suction passage 13 of the tube lens body 10, the suction force to the fluid and the crushed stone can be adjusted by adjusting the air pressure in the suction passage 13.

In the claimed embodiment, the perfusion port 121 is oriented in a first orientation, and the suction port 131 is oriented in a second orientation, and the fluid can be injected into the renal pelvis p along the perfusion channel 12 from the perfusion port 121 in the first direction directed in the first orientation, and can be sucked into the suction channel 13 of the ureteroscope 100 from the suction port 131 in the second direction directed in the second orientation after being turned to form a fluid loop.

In the process of guiding the crushed stones to the suction port 131, when a large amount of crushed stones enter the suction passage 13 at the same time, the large amount of crushed stones move in the same direction, are easily blocked in the suction passage 13, and are difficult to move backward. In this way, not only the crushed stone jammed in the jammed section of the suction passage 13 is hardly discharged, but also at least one section of the suction passage 13 is jammed, so that the crushed stone positioned in front of the jammed section of the suction passage 13 is caught in the suction passage 13 or outside the suction passage 13, and more crushed stone is deposited in the suction passage 13 to form a stone street, which is hard to be discharged, and thus the discharge efficiency of the crushed stone is low and the operation time is long.

A guide device 40 may be provided in the suction passage 13 to guide the crushed stones in the passage of the suction passage 13 to move backward. Specifically, the guiding device 40 divides the space in the suction channel 13, so that the crushed stone flowing into the suction channel 13 moves backwards in order under the guiding action of the crushed stone, so as to avoid the crushed stone from blocking the suction channel 13, thereby improving the crushed stone guiding efficiency.

Accordingly, in step S130, the crushed stone is discharged to the outside of the body by discharging the crushed stone to the outside of the body through the guide device 40 provided in the suction passage 13. Specifically, the guide body 41 of the guide device 40 includes a main body 411 and at least one threaded guide wire 412 formed on an outer peripheral side surface of the main body 411, and a screwing direction of the threaded guide wire 412 coincides with a rotation direction of the guide body 41, as shown in fig. 8B and 8C.

It should be noted that, in the embodiment of the present application, the thread guide line 412 protrudes from the outer peripheral side surface of the guide body 41, and divides the space between the suction channel 13 and the guide body 41 into a plurality of subspaces, so that the broken stones in the suction channel 13 are orderly arranged in the suction channel 13 and guided out along with the rotation of the guide body 41, so as to avoid the occurrence of blockage, as shown in fig. 8D.

Accordingly, step S130 includes: driving the guide device 40 to rotate; and, the crushed stone between the suction passage 13 and the guide device 40 is moved backward to discharge the crushed stone outside the body.

It should be noted that, since the thread guide line 412 protrudes from the main body 411 of the guide main body 41, compared to the main body 411, the distance between the thread guide line 412 and the inner peripheral wall of the suction channel 13 is smaller, and when the crushed stone passes through the thread guide line 412 and the size of the crushed stone is larger than the gap between the thread guide line 412 and the inner peripheral wall of the suction channel 13, the crushed stone is squeezed and further crushed, so that the crushed stone with smaller size is formed, and the crushed stone can more easily pass through the suction channel 13.

In a specific example of the present application, the threaded guide wire 412 has a blade structure convexly formed on an outer peripheral side surface of the main body portion 411, and is capable of cutting debris between an inner peripheral wall of the suction passage 13 and the guide body 41 during rotation of the guide body 41. Specifically, the screwing direction of the blade structure is consistent with the rotating direction of the guide main body 41, so that the crushed stone can be prevented from splashing, and therefore, when the crushed stone moves, the crushed stone can be cut by the blade structure and can be more easily chipped, the size of the chipped crushed stone is smaller, the crushed stone can more easily pass through the suction channel 13, and the crushed stone guiding efficiency can be improved.

Accordingly, step S130 further includes: the crushed stone between the inner peripheral wall of the suction passage 13 and the guide 40 is cut.

In summary, a guiding device 40 for a ureteroscope and a ureteroscope 100 based on the embodiments of the present application are illustrated, wherein the ureteroscope 100 can guide the guiding device 40 in the suction channel 13 to move backwards to avoid the blockage of the crushed stone.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the present invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims (12)

1. A ureteroscope, comprising:

an operation section;

a tube lens body having a front end and a rear end, comprising: a tube structure body, at least one perfusion channel extending within the tube structure body from the rear end to the front end, a suction channel extending within the tube structure body from the front end to the rear end, the suction channel having a suction port at the front end, the operating portion being coupled to the rear end of the tube scope body;

a lithotripsy mechanism disposed within the tubular body; and

and the guide device is arranged in the suction channel and is used for guiding out the broken stone entering the suction channel.

2. The ureteroscope according to claim 1, wherein the guiding device comprises a guiding main body disposed in the suction channel, the guiding main body comprises a main body part and at least one threaded guiding wire formed on a peripheral side surface of the main body part, and a screwing direction of the threaded guiding wire coincides with a rotating direction of the guiding main body.

3. The ureteroscope of claim 2, wherein the guide body extends from the front end to the back end within the suction channel.

4. The ureteroscope of claim 3, wherein the guide body comprises a flexible portion adjacent to the front end portion and a rigid portion extending rearwardly from the flexible portion.

5. The ureteroscope of claim 3, wherein the tube structure body has a front end face, the suction port being formed in the front end face, and the front end of the guide body being flush with the front end face.

6. The ureteroscope of claim 2, wherein the guide body is disposed within the suction channel.

7. The ureteroscope according to claim 2, wherein the threaded guide wire has a blade structure protrudingly formed on a peripheral side surface of the main body portion, and a screwing direction of the blade structure coincides with a rotation direction of the guide body.

8. The ureteroscope of claim 2, wherein the guiding device comprises a driver coupled to the guiding body, the driver configured to drive the guiding body in rotation.

9. The ureteroscope according to claim 2, wherein the guide device is detachably mounted between the scope body and the operating portion.

10. The ureteroscope of claim 9, wherein the guide device further comprises a mounting carrier removably mounted to the operating portion.

11. The ureteroscope according to claim 2, wherein the scope body includes a front end surface and an outer peripheral surface, the perfusion channel has a perfusion opening at the front end portion, the perfusion opening is formed at the outer peripheral surface of the tube structure body, and the suction opening is formed at the front end surface of the tube structure body.

12. A guide device for a ureteroscope, comprising:

the guiding body comprises a main body part and at least one threaded guiding wire formed on the outer peripheral side surface of the main body part, and the screwing direction of the threaded guiding wire is consistent with the rotating direction of the guiding body; and

a driver coupled to the guide body for driving the guide body to rotate.

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