Looping ureteroscope for removing calculus

Abstract

Disclosed is a ureteroscope capable of circularly discharging stones, comprising a ureteroscope main body and an operating part. The ureteroscope main body comprises a tube structure main body, at least one liquid injection channel and at least one liquid outlet channel. The at least one liquid injection channel has at least one liquid outlet at the front end part, and the at least one liquid outlet channel has at least one liquid inlet at the front end part. In particular, the liquid outlet has a first orientation, and the liquid inlet has a second orientation which is at a preset angle with the first orientation. Through the special combination of the positions of the liquid outlet and the liquid inlet, the fluid discharged from the liquid outlet is backflowed to the liquid inlet after forming a circular flow in the renal pelvis, so as to improve the discharge efficiency of the stones and prevent the fluid discharged from the liquid outlet from directly flowing into the liquid inlet without passing through the renal pelvis.

Description

Technical Field

[0001] This application relates to the field of medical devices, and in particular to a surgical ureteroscope that can be looped to expel stones. Background Technology

[0002] In recent years, ureteroscopy has been widely used in the treatment of urinary tract stones. Specifically, a ureteroscope can be inserted through the urethra into the ureter or kidney, allowing medical professionals to use it in conjunction with imaging and lighting equipment to observe the condition inside the kidney and break up stones in the target location.

[0003] In practical applications, during ureteroscopic stone removal, when the stones are large, traditional ureteroscopes, even after breaking them into fragments with an equivalent diameter of approximately 2mm, struggle to pulverize them and effectively remove the fragments from the patient's body. Therefore, after stone fragmentation using traditional ureteroscopy, 60%-90% of the fragments remain in the kidney and are difficult to eliminate naturally, resulting in a low stone removal rate. These residual fragments can form "stone streets" in the ureter, obstructing the ureter, and are a major cause of high stone recurrence rates.

[0004] To address this issue, a ureteroscope design capable of extracting stone fragments has been proposed. In this design, the ureteroscope is equipped with a stone removal mechanism to promptly expel the fragments from the body. However, the ureteroscope still has some problems in practical applications, such as low stone extraction efficiency.

[0005] Therefore, a new ureteroscope design is needed to improve the efficiency of stone removal. Summary of the Invention

[0006] One advantage of this application is that it provides a ureteroscope for cyclic stone removal, wherein the ureteroscope for cyclic stone removal has a relatively high stone fragment removal efficiency.

[0007] Another advantage of this application is that it provides a ureteroscope for recirculating stone removal, wherein the outlet and inlet of the ureteroscope have a special arrangement so that the fluid ejected from the outlet forms a loop in the renal pelvis and flows back to the inlet. In this way, not only is the efficiency of stone removal improved, but also the fluid discharged from the outlet is prevented from flowing directly into the inlet without passing through the renal pelvis.

[0008] Another advantage of this application is that it provides a ureteroscope for cyclic stone removal, wherein the outlet and inlet of the ureteroscope have a special positional combination to reduce the degree of suction interference caused by the negative pressure in the outlet channel on the fluid ejected from the outlet.

[0009] Other advantages and features of this application will become apparent from the following description and can be realized by means and combinations particularly pointed out in the claims.

[0010] To achieve at least one of the above advantages, according to one aspect of this application, this application provides a ureteroscope for laparoscopic stone removal, comprising:

[0011] The scope body has a front end and a rear end; and

[0012] An operating part is operably disposed at the rear end of the endoscope body;

[0013] The main body of the endoscope includes:

[0014] Pipe structure main body;

[0015] At least one injection channel extending from the rear end to the front end within the main body of the tube structure, the at least one injection channel having at least one outlet located at the front end; and

[0016] At least one liquid outlet channel extends from the front end to the rear end within the main body of the tube structure, and the at least one liquid outlet channel has at least one liquid inlet located at the front end;

[0017] The fluid inlet of the injection channel has a first orientation to allow fluid to be injected into the renal pelvis from the outlet in a first direction pointing to the first orientation along the injection channel. The fluid inlet of the outlet channel has a second orientation at a preset angle to the first orientation to allow the fluid to be drawn into the outlet channel from the inlet in a second direction pointing to the second orientation after being turned in the renal pelvis, so as to form a fluid loop.

[0018] In the ureteroscope for reversible stone removal according to this application, the angle between the first direction and the second direction is greater than or equal to 90° and less than 180°.

[0019] In the ureteroscope for reversible stone removal according to this application, the inlet is located in front of the outlet in an axial direction set by the body of the ureteroscope.

[0020] In the ureteroscope for recirculating stone removal according to this application, the outlet and the inlet are two separate openings.

[0021] In the ureteroscope for reversible stone removal according to this application, the main body of the tube structure has a front end face and an outer peripheral face, wherein the outlet is formed on the outer peripheral face of the main body of the tube structure and the inlet is formed on the front end face of the main body of the tube structure.

[0022] In the ureteroscope for reversible stone removal according to this application, the angle between the central axis of the ureteroscope body and the central axis of the outlet is greater than 0° and less than or equal to 90°.

[0023] In the ureteroscope for reversible stone removal according to this application, the front end face of the tube structure body extends obliquely forward from a first side of the outer peripheral surface to a second side opposite to the first side along an axis set by the tube diameter body.

[0024] In the ureteroscope for reversible stone removal according to this application, the at least one injection channel includes a first injection channel and a second injection channel, the first injection channel having a first outlet located at the front end, and the second injection channel having a second outlet located at the front end.

[0025] In the ureteroscope for reversible stone removal according to this application, the outer diameter of the main tube structure is 4.3 mm, the diameter of the fluid outlet channel is 2.2 mm, and the equivalent diameter of the first fluid injection channel is greater than or equal to 1.2 mm.

[0026] In the ureteroscope for recirculating stone removal according to this application, the ureteroscope body further includes an optical fiber channel extending from the rear end to the front end within the tubular structure body.

[0027] In the ureteroscope for reversible stone removal according to this application, the optical fiber channel is connected to the fluid outlet channel.

[0028] In the ureteroscope for recirculating stone removal according to this application, the ureteroscope further includes a lithotripsy mechanism for striking the stones, the lithotripsy mechanism being disposed in the optical fiber channel.

[0029] In the ureteroscope for reversible stone removal according to this application, the ureteroscope further includes an image acquisition device and a light source installed on the main body of the ureteroscope.

[0030] The further objectives and advantages of this application will become fully apparent from the following description and accompanying drawings.

[0031] These and other objects, features and advantages of this application are fully realized through the following detailed description, the accompanying drawings and claims. Attached Figure Description

[0032] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0033] Figure 1 The illustration shows one of the working diagrams of an existing ureteroscope.

[0034] Figure 2 The illustration shows a second schematic diagram of the operation of an existing ureteroscope.

[0035] Figure 3 The illustration shows a schematic diagram of a ureteroscope for circumferential stone removal according to an embodiment of this application.

[0036] Figure 4 Another schematic diagram of a ureteroscope for circumferential stone removal according to an embodiment of this application is shown.

[0037] Figure 5 The illustration shows a schematic diagram of the main body of a ureteroscope for circumferential stone removal according to an embodiment of this application.

[0038] Figure 6A The illustration shows one of the partial schematic diagrams of the main body of a ureteroscope for circumferential stone removal according to an embodiment of this application.

[0039] Figure 6B The illustration shows a second partial schematic diagram of the main body of a ureteroscope for circumferential stone removal according to an embodiment of this application.

[0040] Figure 6C The illustration shows a partial schematic diagram of the main body of a ureteroscope for circumferential stone removal according to an embodiment of this application.

[0041] Figure 6D The illustration shows a partial schematic diagram of the main body of a ureteroscope for circumferential stone removal according to an embodiment of this application.

[0042] Figure 7A The illustration shows a partial schematic diagram of the main body of a ureteroscope for circumferential stone removal according to a modified embodiment of the present application.

[0043] Figure 7B The illustration shows a second partial schematic diagram of the main body of a ureteroscope for circumferential stone removal according to a modified embodiment of the present application.

[0044] Figure 7C The illustration shows a partial schematic diagram of the main body of a ureteroscope for circumferential stone removal according to a modified embodiment of the present application.

[0045] Figure 7D The illustration shows a partial schematic diagram of the main body of a ureteroscope for circumferential stone removal according to a modified embodiment of the present application.

[0046] Figure 8 The illustration shows a partial cross-sectional schematic diagram of the main body of a ureteroscope for circumferential stone removal according to an embodiment of this application.

[0047] Figure 9A The illustration shows one of the working diagrams of a ureteroscope body for reversible stone removal according to an embodiment of this application when the ureteroscope body is in the renal pelvis.

[0048] Figure 9B The illustration shows a second schematic diagram of the operation of a ureteroscope body for reversible stone removal according to an embodiment of this application when the ureteroscope body is in the renal pelvis.

[0049] Figure 10A The illustration shows one of the working schematic diagrams of a ureteroscope with loopable stone removal according to an embodiment of this application for treating stones in different locations within the kidney.

[0050] Figure 10B The illustration is a second schematic diagram of a ureteroscope with loopable stone removal function used to treat stones in different locations within the kidney according to an embodiment of this application.

[0051] Figure 10C The illustration is a third schematic diagram of a ureteroscope with loopable stone removal function according to an embodiment of this application, used to treat stones in different locations within the kidney. Detailed Implementation

[0052] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0053] Application Overview

[0054] As mentioned earlier, during ureteroscopic stone removal, when the stone is large, traditional ureteroscopes, even after breaking it into fragments with an equivalent diameter of approximately 2 mm, struggle to pulverize the fragments and effectively remove them from the patient's body. Residual stone fragments are one of the main reasons for the high recurrence rate of kidney stones.

[0055] To address this issue, a ureteroscope design capable of extracting stone fragments has been proposed. In this design, the ureteroscope is equipped with a stone removal mechanism to promptly expel the fragments from the body. However, the ureteroscope still has some problems in practical applications, such as low stone extraction efficiency.

[0056] Specifically, such as Figure 1 and Figure 2 As shown, a self-draining ureteroscope has a tubing 11P with an inlet channel 110P and an outlet channel 120P. The inlet channel 110P has an inlet outlet 1101P, and the outlet channel 120P has an outlet inlet 1202P. The inlet channel 110P is used for water intake, and the outlet channel 120P is used for water and stone fragments discharge. During stone fragmentation, the water flow exiting from the inlet outlet 1101P of the inlet channel 110P impacts and breaks up the stones. When the water flow carrying the stones moves to the vicinity of the outlet inlet 1202P of the outlet channel 120P, due to the negative pressure environment of the outlet channel 120P, the water flow and stones can be attracted to the outlet channel 120P to expel the stones from the body.

[0057] However, in practical applications of this scheme, after the water flows out of the inlet outlet 1101P, it flows back directly in the opposite direction to the outlet 1202P, which faces the same direction as the inlet outlet 1101P. Furthermore, the inlet outlet 1101P of the inlet channel 110P and the outlet 1202P of the outlet channel 120P are relatively close. Therefore, the water flowing out of the inlet outlet 1101P of the inlet channel 110P is easily interfered with by the suction force within the outlet channel 120P. This causes a portion of the water flowing out of the inlet outlet 1101P of the inlet channel 110P to be attracted to the outlet 1202P of the outlet channel 120P without impacting the stones. Thus, a portion of the water flowing out of the inlet channel 110P does not effectively impact and break up the stones, leaving the stones remaining in the kidney, resulting in low stone removal efficiency.

[0058] Furthermore, the inlet outlet 1101P protrudes more than the outlet outlet 1202P. When fluid exits from the inlet outlet 1101P and impacts the lithotripsy, it is difficult to dislodge heavier lithotripsy from the bottom of the renal pelvis, or it can only cause the lithotripsy to move haphazardly, resulting in low lithotripsy removal efficiency. Figure 2 As shown.

[0059] Furthermore, since the inlet outlet 1101P of the inlet channel 110P and the outlet inlet 1202P of the drain channel 120P are both formed on the working end face of the self-draining ureteroscope tube 11P, and both the inlet outlet 1101P and the outlet inlet 1202P occupy the radial space of the ureteroscope tube 11P, the outlet inlet 1202P is relatively large in order to ensure that the stone fragments can pass through the outlet channel 120P. Due to the limitation of the radial space of the ureteroscope tube 11P, the inlet outlet 1101P is relatively small, resulting in a smaller water flow rate, weaker impact force, and shorter water jet range. Increasing the inlet pressure to increase the impact force and extend the range would increase the risk of increased pressure within the renal pelvis. The small size of the inlet outlet 1101P makes it difficult for the stone fragments to be dislodged by the water flow exiting from it, thus resulting in low stone fragment removal efficiency. Furthermore, water flows with shorter ranges are easily affected by the negative pressure at the discharge inlet 1202P.

[0060] The inventors of this application discovered that the flow direction of the fluid and the relative positional relationship between the inlet outlet 1101P and the outlet inlet 1202P affect the crushed stone removal efficiency. Accordingly, the inventors of this application improve the crushed stone removal efficiency by adjusting the relative positional relationship between the opening for introducing fluid and the opening for discharging fluid, and by controlling the flow direction of the fluid. Based on this, a ureteroscope for cyclic stone removal is proposed, comprising: a ureteroscope body having a front end and a rear end; and an operating part operably disposed at the rear end of the ureteroscope body; wherein the ureteroscope body includes: a tubular structure body; at least one injection channel extending from the rear end to the front end within the tubular structure body, the at least one injection channel having at least one outlet located at the front end; and at least one outlet channel extending from the front end to the rear end within the tubular structure body, the at least one outlet channel having at least one inlet located at the front end; wherein the outlet of the injection channel has a first orientation to allow fluid to be injected into the renal pelvis along the injection channel from the outlet in a first direction pointing to the first orientation, and the inlet of the outlet channel has a second orientation at a predetermined angle to the first orientation to allow the fluid to be diverted within the renal pelvis and then drawn into the outlet channel in a second direction pointing to the second orientation to form a fluid loop.

[0061] Exemplary ureteroscope for reversible stone removal

[0062] like Figures 3 to 9BAs shown, a ureteroscope 100 for reversible stone removal according to an embodiment of this application is illustrated. For ease of explanation, the ureteroscope 100 for reversible stone removal is described using the application of the ureteroscope 100 for treating stones c in the renal pelvis p as an example.

[0063] The retractable ureteroscope 100 can be used to examine the kidneys, break up stones c in the renal pelvis p, and guide the stone fragments out. In this embodiment, the retractable ureteroscope 100 includes a ureteroscope body 10 with a front end 110 and a rear end 120, and an operating part 20 operably disposed on the rear end 120 of the ureteroscope body 10, such as... Figure 3 and Figure 4 As shown.

[0064] In practical applications, the ureteroscope body 10, serving as the insertion part of the retractable stone-removing ureteroscope 100, can extend from the urethra into the ureter or kidney. An image acquisition device 300 and a light source 400 can be installed on the ureteroscope body 10 to acquire images of the kidney and stones located within it. Preferably, the ureteroscope body 10 has a smooth outer surface, or the outer surface of the ureteroscope body 10 remains smooth after entering the patient's body, allowing the ureteroscope body 10 to smoothly enter the kidney. Figure 3 As shown, the operating unit 20, acting as a bridge between the retractable ureteroscope 100 and external devices, can be communicatively connected to the image output device 500 (e.g., a computer communicatively connected to the image acquisition device 300) to acquire images of the kidney and the stones located within it, thereby facilitating the user's observation of the stones c within the renal pelvis p. Furthermore, operable components (e.g., the lithotripsy mechanism 200, the guiding mechanism 600, the infusion device 700, and the suction device 800) can be operated via the operating unit 20 for other functional operations. For example, a holmium laser entering the ureteroscope body 10 through the operating unit 20 can be used to strike the stones c within the renal pelvis p; or, for instance, the suction device 800, connected to the ureteroscope body 10 through the operating unit 20, can be used to aspirate the stones within the kidney.

[0065] Specifically, the endoscope body 10 includes a tubular structure body 11, at least one injection channel 12, and at least one outlet channel 13. The at least one injection channel 12 extends from the rear end 120 to the front end 110 within the tubular structure body 11, and the at least one outlet channel 13 extends from the front end 110 to the rear end 120 within the tubular structure body 11. Preferably, the injection channel 12 and the outlet channel 13 are independent of each other, so that during the process of guiding fluid through the injection channel 12 to reach the kidney and impact lithotripsy, the fluid carrying the lithotripsy fragments can be simultaneously drawn to the outlet channel 13, avoiding interference between impact lithotripsy and lithotripsy aspiration.

[0066] The at least one injection channel 12 has at least one outlet 121 located at the front end 110 and at least one first operating port 122 connected to the at least one outlet 121, and the at least one injection channel 13 has at least one inlet 131 located at the front end 110 and a second operating port 132 connected to the at least one inlet 131.

[0067] Accordingly, the operation unit 20 includes an operation body 210, a first operation end 21 disposed on the operation body 210 and connected to the injection channel 12, and a second operation end 22 disposed on the operation body 210 and connected to the outlet channel 13. The operation unit 20 is connected to the injection channel 12 via its first operation end 21 connected to the first operation port 122, and to the outlet channel 13 via its second operation end 22 connected to the second operation port 132. The first operation end 21 is adapted to connect to an injection device 700, allowing the injection device 700 to inject fluid into the renal pelvis p through the injection channel 12. The second operation end 22 is adapted to connect to a suction device 800 (e.g., an air pump), allowing the suction device 800 to aspirate fluid and stones near the outlet channel 13 through the outlet channel 13. To control the negative pressure within the liquid outlet channel 13, in one specific embodiment, the operating unit 20 further includes a negative pressure regulator 26, which is configured to regulate the air pressure within the liquid outlet channel 13, such as... Figure 3 and Figure 4 As shown.

[0068] It should be understood that the functions of the first operating terminal 21 and the second operating terminal 22 are not limited to those described in this application. The first operating terminal 21 and the second operating terminal 22 are also adapted to allow other devices to perform other functional operations. For example, the first operating terminal 21 is adapted to allow the guide mechanism 600 to pass through the injection channel 12 and guide the endoscope body 10 to the target position. It should also be understood that the operating section 20 may include other operating terminals to allow other devices to perform other functional operations.

[0069] It is worth mentioning that the formation of the injection channel 12 and the outlet channel 13 is not limited to this application. The injection channel 12 and the outlet channel 13 can be formed by multiple through holes in the main body of the tube structure 11 itself, or they can be formed by multiple hollow tubes working together. Accordingly, in some embodiments, the main body of the tube structure 11 has a first through hole 101 and a second through hole 102 penetrating the front end portion 110 and the rear end portion 120 of the endoscope body 10, and the first through hole 101 and the second through hole 102 respectively form the injection channel 12 and the outlet channel 13.

[0070] In some other embodiments, the tubular structure body 11 includes a first tube body 60, a second tube body 70 extending within the first tube body 60, and a third tube body 80 extending within the first tube body 60. The first tube body 60 has a first front opening 61 and a second front opening 63 formed at the front end portion 110 of the endoscope body 10, and a first rear opening 62 and a second rear opening 64 formed at the rear end portion 120 of the endoscope body 10. The second tube body 70 has a first through hole 71 extending between the first front opening 61 at the front end portion 110 and the first rear opening 62 at the rear end portion 120. The first front opening 61, the first through hole 71, and the first rear opening 62 are interconnected and form the injection channel 12, wherein the first front opening 61 forms the outlet 121 of the injection channel 12, and the first rear opening 62 forms the first operating port 122 of the injection channel 12. The third tube body 80 has a second through hole 81 extending between the second front opening 63 of the front end portion 110 and the second rear opening 64 of the rear end portion 120. The second front opening 63, the second through hole 81 and the second rear opening 64 are interconnected and form the liquid outlet channel 13. The second front opening 63 forms the liquid inlet 131 of the liquid outlet channel 13, and the second rear opening 64 forms the second operating port 132 of the liquid outlet channel 13.

[0071] The connection method between the first tube 60, the second tube 70, and the third tube 80 is not limited to that described in this application. For example, the first tube 60, the second tube 70, and the third tube 80 can be integrally combined to form an integral structure, or the second tube 70 and the third tube 80 can be respectively fixed inside the first tube 60.

[0072] In practical applications, the lithotripsy mechanism 200 (e.g., a holmium laser) can reach the kidney and break up the stone c. During the holmium laser fragmentation of the stone c, the infusion channel 12 guides fluid from its outlet 121 to impact and fragment the stone, carrying the fragments along with it. The air pressure inside the outlet channel 13 is negative; therefore, when the fluid carrying the stone moves to a position near the inlet 131, the fluid and stone are attracted to the outlet channel 13, and the fluid may be disturbed by the suction force within the outlet channel 13 during the impact fragmentation process.

[0073] The inventors of this application have discovered that the suction interference on the fluid can be reduced by adjusting the relative positional relationship between the outlet 121 and the inlet 131 and controlling the flow direction of the fluid, thereby improving the efficiency of stone removal. In the embodiments of this application, the outlet 121 and inlet 131 of the ureteroscope 100 with loop-like stone removal have a special pose combination, so that the fluid ejected from the outlet 121 forms a loop in the renal pelvis p and flows back to the inlet 131. In this way, not only is the efficiency of stone removal improved, but also the fluid discharged from the outlet 121 is prevented from flowing directly into the inlet 131 without passing through the renal pelvis p. Here, pose refers to the position and orientation of the outlet 121 and the inlet 131, which can be represented by 6 degrees of freedom (three degrees of freedom of movement in the three coordinate axes and three degrees of freedom of rotation around the three coordinate axes).

[0074] Specifically, in this embodiment, the outlet 121 of the injection channel 12 has a first orientation to allow fluid to be injected into the renal pelvis p from the outlet 121 in a first direction pointing to the first orientation along the injection channel 12. The inlet 131 of the outlet channel 13 has a second orientation at a preset angle to the first orientation to allow the fluid to be diverted within the renal pelvis p and then drawn into the outlet channel 13 from the inlet 131 in a second direction pointing to the second orientation to form a fluid loop. Figures 8 to 9B As shown.

[0075] The second orientation is different from the first orientation, and the first direction is the same as the first orientation, while the second direction is opposite to the second orientation, such that the angle between the first direction and the second direction is neither 0° nor 180°. That is, the first direction and the second direction are not in the same direction, nor are they opposite to each other. In this way, the fluid ejected from the outlet 121 along the first direction flows back along the second direction, which is at an angle to the first direction, after being turned, forming a vortex-like fluid loop. This can prevent the fluid ejected from the outlet 121 along the first direction from flowing back directly along the opposite direction to the inlet 131, which is in the same orientation as the outlet 121, thereby reducing the attraction force that interferes with the fluid.

[0076] It is worth mentioning that in other embodiments of this application, the first direction and the second direction can be in the same direction or opposite to each other, and the liquid outlet 121 and the liquid inlet 131 are isolated from each other, which can reduce the interference of negative pressure in the liquid outlet channel 13 on the fluid. This is not limited to this application.

[0077] In this embodiment, the angle between the first direction and the second direction is greater than or equal to 90° and less than 180°. In one specific example, the second direction is parallel to or infinitely close to the axis set by the endoscope body 10, and the angle between the first direction and the axis set by the endoscope body 10 is greater than 0° and less than or equal to 90°. Accordingly, the angle between the first direction and the second direction is greater than or equal to 90° and less than 180°. In another specific example, the first direction is parallel to or infinitely close to the axis set by the endoscope body 10, and the angle between the second direction and the axis is greater than 0° and less than or equal to 90°. Accordingly, the angle between the first direction and the second direction is greater than or equal to 90° and less than 180°.

[0078] In one specific embodiment of this application, the included angle between the central axis of the liquid outlet 121 and the central axis of the liquid inlet 131 is greater than 0° and less than or equal to 90°, so that the first direction and the second direction form a preset angle.

[0079] In this embodiment, the outlet 121 and the inlet 131 are not flush along the axial direction set by the endoscope body 10. This extends the distance between the outlet 121 and the inlet 131, as well as the fluid's movement path. This not only reduces the negative pressure in the outlet channel 13 from interfering with the fluid's attraction, but also, because the fluid flows over a wider area, it can carry more gravel along its movement path, thus improving the gravel removal efficiency.

[0080] Here, the fact that the outlet 121 and the inlet 131 are not aligned axially with the scope body 10 means that there is a height difference between the outlet 121 and the inlet 131, and that the distances between the outlet 121 and the inlet 131 and the foremost point of the scope body 10 are different. In a specific example, the distance between the outlet 121 and the foremost point of the scope body 10 is greater than the distance between the inlet 131 and the foremost point of the scope body 10. That is, the inlet 131 is located axially in front of the outlet 121, and the inlet 131 is closer to the foremost point of the scope body 10 than the outlet 121. In another specific example, the distance between the outlet 121 and the front end of the endoscope body 10 is less than the distance between the inlet 131 and the front end of the endoscope body 10. That is, the outlet 121 is located in front of the inlet 131 in the axial direction, and the outlet 121 is closer to the front end of the endoscope body 10 than the inlet 131.

[0081] In a modified embodiment of this application, the liquid outlet 121 and the liquid inlet 131 may be flush along the axial direction set by the endoscope body 10, which is not a limitation of this application.

[0082] In this embodiment, the outlet 121 and the inlet 131 are two isolated openings, thereby reducing the suction interference caused by the negative pressure in the outlet channel 13 on the fluid. In some embodiments of this application, the outlet 121 and the inlet 131 are located on two different surfaces.

[0083] In a specific example of this application, such as Figure 8 As shown, the main body of the tubular structure 11 has a front end face 1101 and an outer peripheral face 1102. The outlet 121 is formed on the outer peripheral face 1102 of the main body of the tubular structure 11, and the inlet 131 is formed on the front end face 1101 of the main body of the tubular structure 11. Thus, the outlet 121 opens laterally, and the inlet 131 opens forward. Fluid is injected into the renal pelvis p from the outlet 121 formed on the outer peripheral face 1102 of the main body of the tubular structure 11 in the first direction. After being redirected, it must bypass the outer peripheral face 1102 and be drawn into the outlet channel 13 from the inlet 131 in the second direction, forming a vortex-like fluid loop, which can reduce the suction interference on the fluid.

[0084] Specifically, the tubular structure body 11 includes a front peripheral wall 111 and a rear peripheral wall 112 extending rearward from the front peripheral wall 111. The front peripheral wall 111 has a front outer peripheral surface 1111 and a front inner peripheral surface 1112, and the rear peripheral wall 112 has a rear outer peripheral surface 1121 and a rear inner peripheral surface 1122. The front outer peripheral surface 1111 and the rear outer peripheral surface 1121 form the outer peripheral surface 1102 of the tubular structure body 11.

[0085] The front peripheral wall 111 further has a front section 1113 formed between the front outer peripheral surface 1111 and the front inner peripheral surface 1112, and the rear peripheral wall 112 further has a rear section 1123 formed between the rear outer peripheral surface 1121 and the rear inner peripheral surface 1122, opposite to the front section 1113. The front section 1113 and the rear section 1123 form the liquid outlet 121. In this specific example, the first orientation refers to the direction in which a plane equidistant from the plane containing the front section 1113 and the plane containing the rear section 1123 extends relative to the outer peripheral surface 1102. Fluid injected into the injection channel 12 exits along the front section 1113 and the rear section 1123 of the tube structure body 11 in the first direction, wherein the first direction is consistent with the first orientation.

[0086] The tubular structure body 11 further includes a first front end wall 113 and a second front end wall 114 extending laterally from the first front end wall 113. The first front end wall 113 has a first inner end face 1132 and a first outer end face 1131, and the second front end face 1101 has a second inner end face 1142 and a second outer end face 1141. The first outer end face 1131 and the second outer end face 1141 form the front end face 1101 of the tubular structure body 11, and the first inner end face 1132 and the second inner end face 1142 form the inner end face of the tubular structure body 11.

[0087] The first front end wall 113 further has a first cross section 1133 formed between the first inner end face 1132 and the first outer end face 1131, and the second front end wall 114 further has a second cross section 1143 formed between the second inner end face 1142 and the second outer end face 1141, opposite to the first cross section 1133. The first cross section 1133 and the second cross section 1143 form the liquid inlet 131. In this specific example, the second orientation refers to the direction in which a plane equidistant from the plane containing the first cross section 1133 and the plane containing the second cross section 1143 extends relative to the front end face 1101. The preset angle between the second orientation and the first orientation is greater than 0° and less than or equal to 90°. Fluid near the liquid inlet 131 is drawn into the liquid outlet channel 13 along the first cross section 1133 and the second cross section 1143 of the tube structure body 11 in the second direction, wherein the second direction is opposite to the second orientation, and the angle between the first direction and the second direction is greater than or equal to 90° and less than 180°.

[0088] Specifically, in this particular example, the outlet 121 formed on the outer peripheral surface 1102 of the main body of the pipe structure 11 mainly occupies the axial dimension of the main body of the pipe structure 11, while the inlet 131 formed on the front end surface 1101 of the main body of the pipe structure 11 mainly occupies the radial dimension of the main body of the pipe structure 11. Thus, without needing to coordinate the space ratio occupied by the outlet 121 and the inlet 131 in the radial direction of the main body of the pipe structure 11 under the condition of limited radial dimension, the dimensions of both the inlet 131 and the outlet 121 can be relatively increased, and the design flexibility of the shape and number of the inlet 131 and the outlet 121 is also relatively improved. Through the reasonable arrangement of the outlet 121 and the inlet 131, while ensuring that the size of the inlet 131 of the outlet channel 13 allows for the smooth passage of fluid and gravel, the liquid output of the outlet 121 of the injection channel 12 can be guaranteed.

[0089] When the fluid output from the outlet 121 is large, on the one hand, the range of the fluid ejected from the outlet 121 is relatively extended, the impact force on the stone fragments is relatively increased, the suction interference is relatively reduced, and the stone fragment removal efficiency is relatively improved. On the other hand, the ureteroscope can achieve a large fluid output at a relatively low injection pressure, reducing the risk of increased pressure within the kidney.

[0090] Specifically, such as Figures 5 to 6DAs shown, in one embodiment of this specific example, the front end face 1101 of the tubular structure body 11 extends obliquely forward from a first side of the outer peripheral surface 1102 toward a second side opposite to the first side along the axial direction set by the endoscope body 10. For example, the front end face 1101 of the tubular structure body 11 extends obliquely forward from a lower side of the outer peripheral surface 1102 toward an upper side opposite to the lower side along the axial direction set by the endoscope body 10, such as... Figure 6A As shown.

[0091] Accordingly, the inlet 131 formed on the front end face 110 extends obliquely forward from the first side of the outlet channel 13 to the second side opposite to the first side along the axial direction set by the endoscope body 10, wherein the first side of the outer peripheral surface 1102 corresponds to the first side of the outlet channel 13, and the second side of the outer peripheral surface 1102 corresponds to the second side of the outlet channel 13. Accordingly, the shape of the inlet 131 is approximately elliptical.

[0092] Specifically, the front end surface 1101 may be designed as a convex inclined surface, a concave inclined surface, a wavy inclined surface, or other types of inclined surface formed between the first and second sides of the outer peripheral surface 1102, and is not limited to this application. In a specific example of this application, the front end surface 1101 is designed as a wavy inclined surface with a central concave shape formed between the first and second sides of the outer peripheral surface 1102.

[0093] It should be understood that in other embodiments, the front end face 1101 of the tube structure body 11 may also be designed such that the front end face 1101 of the tube structure body 11 extends flush with the first side of the outer peripheral surface 1102 to the second side opposite to the first side along the axial direction set by the endoscope body 10 (that is, the end of the front end face 1101 near the first side of the liquid outlet channel 13 is axially flush with the end of the second side of the liquid outlet channel 13), and this is not limited to the present application.

[0094] It is worth mentioning that when the front end face 1101 is designed to extend forward at an angle from the first side to the second side of the outer peripheral face 1102 along the axis set by the endoscope body 10, on the one hand, compared to the front end face 1101 being designed to extend flush from the first side to the second side of the fluid outlet channel 13 (that is, the end of the front end face 1101 near the fluid outlet channel 13 is flush with the end near the second side of the fluid outlet channel 13 in the axial direction), the fluid travels a longer distance, which not only reduces the suction interference, but also, because the fluid flows through a wider area, it can carry more stones in the kidney that are in the fluid's movement path, thus improving the stone removal efficiency. On the other hand, when the front end face 1101 is designed to extend forward at an angle from the first side to the second side of the outer peripheral face 1102 along the axis set by the scope body 10, it can provide a relatively large distribution space for the liquid inlet 131. Correspondingly, the size of the liquid inlet 131 is relatively increased, which allows more gravel and a larger flow rate of fluid to enter the liquid outlet channel 13 from the liquid inlet 131, avoiding gravel blockage of the liquid inlet 131 and improving the gravel removal efficiency.

[0095] It is worth mentioning that, preferably, the diameter of the injection channel 12 is equal to or slightly larger than the diameter of the outlet channel 13 to achieve flow balance. Here, "the diameter of the injection channel 12 is equal to or slightly larger than the diameter of the outlet channel 13" means that the sum of the equivalent diameters of all the injection channels 12 is equal to or slightly larger than the sum of the equivalent diameters of all the outlet channels 13.

[0096] In one specific embodiment of this application, the number of inlet ports 131 is 1, and the number of outlet ports 121 is 2. Accordingly, the at least one injection channel 12 includes a first injection channel and a second injection channel. The first injection channel has a first outlet located at the front end portion 110, and the second injection channel has a second outlet located at the front end portion 110. The first outlet and the second outlet are arranged opposite to each other.

[0097] In this embodiment, the average of the first inner diameter of the first injection channel and the second inner diameter of the second injection channel is greater than or equal to half the diameter of the outlet channel 13. The size of the outlet 121 matches the size of the first injection channel, and the size of the inlet 131 matches the size of the outlet channel 13. More specifically, the outer diameter of the tube structure body 11 is 4.3 mm, the diameter of the outlet channel 13 is 2.2 mm, and the equivalent diameter of the first injection channel or the second injection channel is greater than or equal to 1.2 mm.

[0098] In another specific embodiment of this application, the number of inlet ports 131 is 1, and the number of outlet ports 121 is 2. The injection channel 12 is formed around the outlet channel 13, that is, the injection channel 12 is an annular channel formed around the outlet channel 13, or the cross-section of the injection channel 12 is annular, and the injection channel 12 has two outlet ports 121 formed at the front end 120, and the two outlet ports 121 are formed on the outer peripheral surface 1102. In this specific embodiment, the outer diameter of the tube structure body 11 is equal to 4.3 mm, the diameter of the outlet channel 13 is equal to 2.2 mm, and the equivalent diameter of the injection channel is greater than or equal to 1.2 mm.

[0099] It should be understood that the size, shape and number of the liquid inlet 131 and the liquid outlet 121 are not limited by this application, and the size, shape and number of the liquid inlet 131 and the liquid outlet 121 can be adjusted according to the actual application to achieve controllable and orderly fluid circulation.

[0100] It is worth noting that the method of isolating the inlet 131 and the outlet 121 is not limited to this application. When the outlet 121 is formed on the front end face 1101 of the tube structure body 11 and the inlet 131 is formed on the outer peripheral face 1102 of the tube structure body 11, the inlet 131 and the outlet 121 can also be isolated from each other. It should be understood that a partition wall can also be provided between the front end face 1101 and the outer peripheral face 1102 to isolate the inlet 131 and the outlet 121.

[0101] Accordingly, in another specific example of this application, the outlet 121 can be designed to be formed on the front end face 1101 of the tube structure body 11, and the inlet 131 can be formed on the outer peripheral face 1102 of the tube structure body 11. The first cross section 1133 of the first front end wall 113 and the second cross section 1143 of the second front end wall 114 of the tube structure body 11 form the outlet 121, and the front cross section 1113 of the front peripheral wall 111 and the rear cross section 1123 of the rear peripheral wall 112 of the tube structure body 11 form the inlet 131.

[0102] Accordingly, the first orientation refers to the direction in which a plane equidistant from the plane containing the first cross-section 1133 and the plane containing the second cross-section 1143 extends relative to the front end face 1101, wherein the first direction and the first orientation are consistent. The second orientation refers to the direction in which a plane equidistant from the plane containing the front cross-section 1113 and the plane containing the rear cross-section 1123 extends relative to the outer peripheral face 1102. The preset angle between the second orientation and the first orientation is greater than 0° and less than or equal to 90°, the second direction is opposite to the second orientation, and the angle between the first direction and the second direction is greater than or equal to 90° and less than 180°.

[0103] Preferably, the liquid outlet 121 is disposed on the outer peripheral surface 1102 of the tube structure body 11, and the liquid inlet 131 is disposed on the front end surface 1101 of the tube structure body 11.

[0104] It is worth mentioning that the positions of the liquid inlet 131 and the liquid outlet 121 are not limited to those specified in this application. In other specific examples, the liquid inlet 131 and the liquid outlet 121 can be located in other positions. For example... Figures 7A to 7D As shown, in a specific example of this application, both the inlet 131 and the outlet 121 are disposed on the front end face 1101 of the main body 11 of the tube structure. Specifically, in this specific example, the injection channel 12 is formed around the outlet channel 13, that is, the injection channel 12 is an annular channel formed around the outlet channel 13, or in other words, the cross-section of the injection channel 12 is annular, and the injection channel 12 has two filling ports 121 formed at the front end 120, and the two filling ports 121 are located on both sides of the suction port 131.

[0105] In this embodiment of the application, the endoscope body 10 further includes an optical fiber channel 14 extending from the rear end portion 120 to the front end portion 110 within the tube structure body 11. The optical fiber channel 14 has an optical fiber channel opening 141 located at the front end portion 110 and a third operating port 142 located at the rear end portion 120 of the endoscope body 10.

[0106] Accordingly, in some embodiments, the tube structure body 11 further has a third through hole 103 penetrating the front end portion 110 and the rear end portion 120 of the endoscope body 10, the third through hole 103 forming the optical fiber channel 14. In other embodiments, the tube structure body 11 further includes a fourth tube body 90, the fourth tube body 90 cooperating with other tube bodies (e.g., the first tube body 60, the second tube body 70, and the third tube body 80) to form the optical fiber channel 14.

[0107] It is worth mentioning that the optical fiber channel 14 can be independent of the injection channel 12 and the outlet channel 13, or it can be interconnected with the injection channel 12 and / or the outlet channel 13. In a specific example of this application, the optical fiber channel 14 is independent of the injection channel 12 and the outlet channel 13. Specifically, the tube structure body 11 further includes a fourth tube body 90 extending within the first tube body 60, the first tube body 60 having a third front opening 65 formed at the front end portion 110 of the endoscope body 10, and a third rear opening 66 formed at the rear end portion 120 of the endoscope body 10. The fourth tube 90 has a third through hole 91 extending between the third front opening 65 of the front end portion 110 and the third rear opening 66 of the rear end portion 120. The third front opening 65, the third through hole 91 and the third rear opening 66 form the optical fiber channel 14, wherein the third front opening 65 forms the optical fiber channel opening 141 and the third rear opening 66 forms the third operating port 142.

[0108] In yet another specific example of this application, such as Figure 8 As shown, the optical fiber channel 14 is connected to the liquid outlet channel 13. In this specific example, the optical fiber channel 14 and the liquid outlet channel 13 share at least a portion of the tube body and at least one opening.

[0109] Specifically, the main tube structure 11 further includes a fourth tube 90 extending within the first tube 60. The first tube 60 has a first rear opening 62 and a second rear opening 64 formed at the rear end portion 120 of the endoscope body 10; the third tube 80 has a second through hole 81 extending between the second front opening 63 at the front end portion 110 and the second rear opening 64 at the rear end portion 120. The second front opening 63, the second through hole 81, and the second rear opening 64 are interconnected and form the liquid outlet channel 13. The second front opening 63 forms the liquid inlet 131 of the liquid outlet channel 13, and the second rear opening 64 forms the second operating port 132 of the liquid outlet channel 13. The third tube 80 also has a connection interface 82, and the first tube 60 also has a third rear opening 66 formed at the rear end portion 120 of the endoscope body 10. The fourth tube 90 has a third through hole 91 extending between the connection interface 82 of the third tube 80 and the third rear opening 66 of the rear end 120. The fourth tube 90 is interconnected with the third tube 80 and the second front opening 63 of the first tube 60. The second front opening 63, at least a portion of the third tube 80, the third through hole 91, and the third rear opening 66 form the optical fiber channel 14. The third rear opening 66 forms the third operating port 142 of the optical fiber channel 14. The second front opening 63 forms a common opening for the optical fiber channel 14 and the liquid outlet channel 13. The second front opening 63 can be used as both the liquid inlet 131 of the liquid outlet channel 13 and the optical fiber channel opening 141 of the optical fiber channel 14.

[0110] It is worth mentioning that the optical fiber channel 14 can be formed within other channels. For example, in other examples of this application, the optical fiber channel 14 is formed within the liquid outlet channel 13. Specifically, the endoscope body 10 further includes an optical fiber channel 14 extending from the rear end portion 120 to the front end portion 110 within the tube structure body 11, and the fourth tube body 90 extends within the third tube body 80 within the tube structure body 11. The fourth tube body 90 has a front opening, a rear opening, and a third through-hole 91 extending between the front opening and the rear opening, wherein the front opening is formed at the optical fiber channel opening 141, and the rear opening forms the third operating port 142.

[0111] The fiber optic channel 14 is adapted to allow the passage of operable components. For example, in one specific example of this application, the ureteroscope 100 with loopable stone removal further includes a lithotripsy mechanism 200 for striking stones, and the fiber optic channel 14 allows the lithotripsy mechanism 200 (e.g., a holmium laser) to pass through. The lithotripsy mechanism 200 may be fixed within the fiber optic channel 14 or may be movably installed within the fiber optic channel 14, and this is not limited to this application.

[0112] In one specific example of this application, the lithotripsy mechanism 200 is retractably mounted within the optical fiber channel 14, and the lithotripsy mechanism 200 can extend or retract from the optical fiber channel opening 141 within the optical fiber channel 14. In this specific example, the optical fiber channel 14 is connected to the liquid outlet channel 13, and the liquid inlet 131 of the liquid outlet channel 13 is a shared opening of the liquid outlet channel 13 and the optical fiber channel 14. That is, the liquid inlet 131 can be used as the optical fiber channel opening 141, and the lithotripsy mechanism 200 can extend or retract from the liquid inlet 131.

[0113] In another specific example of this application, the stone crushing mechanism 200 is movable relative to the central axis of the liquid inlet 131, and can move in the optical fiber channel 14 in a direction close to the central axis of the liquid inlet 131, or in a direction away from the central axis of the liquid inlet 131.

[0114] The lithotripsy mechanism 200 can be implemented as a holmium laser or other type of tool capable of striking the stone c. The holmium laser emits laser light, and the energy generated by the holmium laser causes the water between the stone c and the holmium laser to form tiny cavitation bubbles, transferring energy to the stone c to strike it. During the process of the holmium laser striking the stone c, the water absorbs a large amount of energy, which can reduce the damage of the holmium laser to the tissue surrounding the stone c.

[0115] Accordingly, the operation unit 20 further includes a third operation end 23 connected to the optical fiber channel 14. The operation unit 20 is connected to the optical fiber channel 14 through the third operation end 23 connected to the third operation port 142, so as to allow the lithotripsy mechanism 200 to enter the optical fiber channel 14 through the operation unit 20, and then enter the kidney to strike the stone c.

[0116] In this embodiment, the ureteroscope 100 for reversible stone removal further includes an image acquisition device 300 and a light source 400 mounted on the ureteroscope body 10 to capture images of the kidney and the stones located within it. The positions of the image acquisition device 300 and the light source 400 are not limited to those described in this application. Preferably, the inlet 131 of the outlet channel 13 is located within the visible area of ​​the image acquisition device 300 to capture images of the vicinity of the inlet 131, allowing the user to observe the removal of the fragmented stones. The light source 400 can be positioned close to the image acquisition device 300 to provide sufficient light for the image acquisition device 300.

[0117] Accordingly, the operation unit 20 further includes a fourth operation terminal 24 communicatively connected to the image acquisition device 300. Furthermore, the image output device 500 (e.g., a computer communicatively connected to the image acquisition device 300) can be communicatively connected to the image acquisition device 300 via the operation unit 20 to acquire images of the kidney and the stones located within it, so that the user can observe the condition of the stones c within the renal pelvis p.

[0118] It is worth mentioning that, in order to ensure the rigidity of the endoscope body 10 while allowing it to bend to reach different target positions, the endoscope body 10 includes a flexible portion 1010 adjacent to the front end portion 110 and a rigid portion 1020 coupled to the flexible portion 1010. The rigid portion 1020 may extend rearward from the flexible portion 1010, or the rigid portion 1020 may cover at least a portion of the flexible portion 1010 to ensure the local rigidity of the endoscope body 10.

[0119] Accordingly, the operating unit 20 further includes a fifth operating end 25 operably connected to the flexible part 1010 and an operating mechanism 27 mounted on the fifth operating end 25. The operating mechanism 27 is operably connected to the flexible part 1010 via the fifth operating end 25 to control the curvature of the flexible part 1010, allowing the endoscope body 10 to reach different target positions. Furthermore, the curvature of the flexible part 1010 can be adjusted according to actual conditions. In a specific example, the operating mechanism 27 includes a control line 271 connected to the flexible part 1010 and an adjuster 272 connected to the control line 271. The adjuster 272 is configured to drive the control line 271 to pull the flexible part 1010, causing the flexible part 1010 to bend. The structure of the operating mechanism 27 and the method of controlling the bending of the flexible part 1010 are not limited to this application; that is, the operating mechanism 27 can be designed with other structures and control the bending of the flexible part 1010 in other ways.

[0120] In one specific example, at least a portion of the front end portion 110 of the endoscope body 10 is the flexible portion 1010, allowing the injection channel 12 and the outlet channel 13 to be flexible, and the inlet 131, the outlet 121, and the fiber optic channel opening 141 to face the stone c at the target location. The flexible portion 1010 includes an active bending portion 1011 and a passive bending portion 1012. The active bending portion 1011 can be bent under the control of the operating part 20 and maintain the bent state, while the passive bending portion 1012 bends along with the bending of the active bending portion 1011.

[0121] Figures 10A to 10C The illustration shows a schematic diagram of a ureteroscope 100 capable of circumferential stone removal treating stones c at different target locations according to an embodiment of this application. The working process of the ureteroscope 100 capable of circumferential stone removal is described below using the application of the ureteroscope 100 capable of circumferential stone removal in the treatment of stones c in the renal pelvis p as an example.

[0122] First, the endoscope body 10 is inserted to the initial predetermined position in the kidney. Specifically, the endoscope body 10 can enter the kidney along the patient's ureter and reach the initial predetermined position. During this process, an image acquisition device 300 disposed on the endoscope body 10 and an image output device 500 communicatively connected to the image acquisition device 300 can acquire and display images of the surrounding environment along the path of the endoscope body 10, and guide the endoscope body 10 to the initial predetermined position in conjunction with a guiding mechanism 600. Specifically, the guiding mechanism 600 can enter the injection channel 12 through the operating part 20 and guide the endoscope body 10 to the initial predetermined position. After the endoscope body 10 reaches the initial predetermined position, the guiding mechanism 600 can be removed.

[0123] Before or after inserting the endoscope body 10, the lithotripsy mechanism 200 can be placed in the initial predetermined position on the kidney. Specifically, the lithotripsy mechanism 200 can be disposed in the optical fiber channel 14 and extend or retract from the optical fiber channel opening 141 (or the inlet 131).

[0124] Next, the flexible part 1010 is bent by the operating mechanism 27 of the operating part 20, so that the inlet 131 and the outlet 121 can be directed toward the stone c at the target location in the renal pelvis p.

[0125] During the process of controlling the bending of the flexible part 1010 through the operating mechanism 27 of the operating unit 20, the flexible part 1010 can be controlled to bend to a desired degree of curvature according to the target position. For example... Figures 10A to 10C As shown, when the retractable ureteroscope 100 is used to strike a stone c located in the upper renal pelvis, the flexible part 1010 is controlled to bend at a first curvature. When the retractable ureteroscope 100 is used to strike a stone c located in the middle renal pelvis, the flexible part 1010 is controlled to bend at a second curvature. When the retractable ureteroscope 100 is used to strike a stone c located in the lower renal pelvis, the flexible part 1010 is controlled to bend at a third curvature, the third curvature being greater than the second curvature and the first curvature.

[0126] The lithotripsy mechanism 200 can be used to break up at least a portion of the stone c into smaller fragments. The lithotripsy mechanism 200 can be implemented as the holmium laser.

[0127] During the process of striking the stone c by the lithotripsy mechanism 200, or after striking the stone c by the lithotripsy mechanism 200, fluid can be ejected in a first direction from the outlet 121 of the reversible ureteroscope 100 to the target location to impact and break the stone. Specifically, fluid can be injected into the injection channel 12 through the injection device 700 connected to the operation unit 20, so that the fluid is injected into the target location to impact and break the stone.

[0128] During impact lithotripsy, fluid and stone fragments are attracted by negative pressure suction. The fluid carrying the stone fragments is redirected by negative pressure suction and renal pelvis backflushing, and flows back in a second direction to the inlet 131 of the ureteroscope 100 capable of recirculating and expelling stones. That is, during impact lithotripsy, the fluid is guided to flow back in a second direction to the inlet 131 of the ureteroscope 100, wherein there is a preset angle between the first and second directions. Specifically, the suction device 800 connected to the operating unit 20 can attract the stone fragments and fluid, allowing the fluid and stone fragments to be discharged through the outlet channel 13 to maintain pressure within the kidney.

[0129] In the embodiment of the application, the outlet 121 is oriented in a first direction, and the inlet 131 is oriented in a second direction. Fluid can be injected into the target location in the renal pelvis p from the outlet 121 along the injection channel 12 in a first direction pointing to the first direction, and after being turned, it is drawn into the outlet channel 13 of the ureteroscope 100 with cyclic stone removal in a second direction pointing to the second direction to form a fluid loop.

[0130] It is worth mentioning that during the process of the lithotripsy mechanism 200 striking the stone c, the main body 10 of the endoscope can be rotated, so that the lithotripsy mechanism 200 can strike the stone from multiple directions, and the fluid ejected from the outlet 121 can comprehensively impact the stone fragments.

[0131] Accordingly, this application provides a ureteroscope for cyclic stone removal and its working method, which includes: step S110, using a lithotripsy mechanism to strike the stone at the target location to break at least part of the stone into fragments; S120, ejecting fluid from the outlet of the ureteroscope in a first direction to the target location; and S130, guiding the fluid to flow back to the inlet of the ureteroscope in a second direction, wherein the first direction and the second direction have a preset angle.

[0132] In summary, the ureteroscope 100 for recirculating stone removal and its working method based on the embodiments of this application have been clarified. The ureteroscope has a special arrangement of its outlet and inlet, which allows the fluid ejected from the outlet to form a loop in the renal pelvis and then flow back to the inlet. This not only improves the efficiency of stone removal but also prevents the fluid discharged from the outlet from flowing directly into the inlet without passing through the renal pelvis.

[0133] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A ureteroscope for circumferential stone removal, characterized in that, include: A scope body having a front end and a rear end; as well as An operating part is operably disposed at the rear end of the endoscope body; The main body of the endoscope includes: Pipe structure main body; At least one injection channel extending from the rear end to the front end within the main body of the tube structure, the at least one injection channel having at least one outlet located at the front end; and At least one liquid outlet channel extends from the front end to the rear end within the main body of the tube structure, and the at least one liquid outlet channel has at least one liquid inlet located at the front end; The tube structure body has a front end face and an outer peripheral face. The liquid outlet is formed on the outer peripheral face of the tube structure body, and the liquid inlet is formed on the front end face of the tube structure body. The liquid outlet and the liquid inlet are two mutually isolated openings. The liquid inlet is located in front of the liquid outlet in the axial direction set by the tube body. The front end face of the tube structure body extends forward along the axial direction of the tube body from a first side of the outer peripheral face to a second opposite side. The fluid inlet of the injection channel has a first orientation to allow fluid to be injected into the renal pelvis from the outlet in a first direction pointing to the first orientation along the injection channel. The fluid inlet of the outlet channel has a second orientation at a preset angle to the first orientation to allow the fluid to be drawn into the outlet channel from the inlet in a second direction pointing to the second orientation after being turned in the renal pelvis, so as to form a fluid loop.

2. The ureteroscope for reversible stone removal according to claim 1, wherein, The angle between the first direction and the second direction is greater than or equal to 90° and less than 180°.

3. The ureteroscope for reversible stone removal according to claim 1, wherein, The angle between the central axis of the main body of the endoscope and the central axis of the outlet is greater than 0° and less than or equal to 90°.

4. The ureteroscope for reversible stone removal according to claim 2, wherein, The front end face of the main body of the tube structure extends obliquely forward from the first side of the outer peripheral surface to the second side opposite to the first side along the axis set by the main body of the tube.

5. The ureteroscope for reversible stone removal according to claim 4, wherein, The at least one injection channel includes a first injection channel and a second injection channel, the first injection channel having a first outlet located at the front end, and the second injection channel having a second outlet located at the front end.

6. The ureteroscope for recirculating stone removal according to claim 5, wherein, The outer diameter of the main tube structure is 4.3 mm, the diameter of the liquid outlet channel is 2.2 mm, and the equivalent diameter of the first liquid injection channel is greater than or equal to 1.2 mm.

7. The ureteroscope for reversible stone removal according to claim 1, wherein, The endoscope body further includes an optical fiber channel extending from the rear end to the front end within the tube structure body.

8. The ureteroscope for recirculating stone removal according to claim 7, wherein, The optical fiber channel is connected to the liquid outlet channel.

9. The ureteroscope for reversible stone removal according to claim 8, further comprising a lithotripsy mechanism for striking the stones, the lithotripsy mechanism being disposed in the optical fiber channel.

10. The ureteroscope for circumferential stone removal according to claim 8, further comprising an image acquisition device and a light source installed on the main body of the ureteroscope.

Images