CN115715664A - Bending type combined ureteroscope - Google Patents

Abstract

The invention provides a bending combined ureteroscope which comprises a bendable sheath and an inner core, wherein the bendable sheath comprises a bending component, a sheath main body and a sheath operating part, the sheath main body extends from one end of the sheath operating part, the bending component is connected to the sheath main body and is far away from the sheath operating part, the inner core comprises an inner core main body and an inner core connecting part, the inner core main body extends from one end of the inner core connecting part and penetrates through the sheath operating part to be positioned in the sheath main body, and the inner core connecting part is connected to the sheath operating part in a sealing mode.

Description

Bending type combined ureteroscope

Technical Field

The invention relates to the field of medical instruments, in particular to a bending type combined ureteroscope.

Background

Traditional soft ureteroscope lithotripsy, in the soft ureteroscope working channel or put into holmium laser and carry out the rubble operation, or put into set stone basket and get the stone operation, the rubble is got the stone and can't go on simultaneously. Because set stone basket calculus extraction is inefficient, if the calculus piece is too much or too tiny, can't take out one by one through set stone basket, remaining calculus needs the patient to discharge by oneself, leads to the clear stone rate of calculus to be lower.

When traditional ureter soft lens lithotripsy is carried out, the ureter soft lens is used together with a guide sheath under most conditions, and the ureter soft lens is soft and difficult to enter a ureter pipe orifice, and a channel needs to be established by using the guide sheath for guiding. A doctor needs to control the guide sheath with one hand and control the ureter soft lens with the other hand, the operation is complex during the actual operation, the doctor cannot control the operation with concentration, and the position can be limited by the position and the operation environment during the operation with the two hands during the use, so that the position is difficult to adjust during the operation.

Because the flexible ureteroscope and the guide sheath are separate instruments and have different models, the flexible ureteroscope and the guide sheath are not adaptive, and if the combination with the larger scope-sheath ratio (the ratio of the outer diameter of the flexible ureteroscope to the inner diameter of the guide sheath) is selected, high pressure in the renal pelvis is easily caused, so that serious complications such as aggravation of infection, renal rupture, bleeding and the like are caused.

Disclosure of Invention

One of the main advantages of the present invention is to provide a bending type combined ureteroscope, wherein when the inner core is inserted after the bendable sheath is inserted, the inner core and the bendable sheath can be combined into a whole, and no guiding sheath is required to be additionally provided, so that there is no problem of adaptability, and the present invention is convenient for a doctor to operate with one hand, thereby reducing the difficulty of the doctor in the operation.

Another advantage of the present invention is to provide a curved combined ureteroscope which can perform laser lithotripsy through the working channel of the inner core, and simultaneously perform suction through the gap between the curved sheath and the inner core, so as to achieve the effects of lithotripsy and stone removal, reduce the internal pressure of the renal pelvis, and improve the stone removal efficiency.

Another advantage of the present invention is to provide a flexible combination ureteroscope wherein the flexible sheath can be rotated in a flexible manner to reach different locations in the renal pelvis, i.e., to remove stones from dead spaces in the kidney, and to remove stones more cleanly.

Another advantage of the present invention is to provide a bending type combined ureteroscope, wherein the inner core can axially rotate in the bendable sheath, so as to loosen the accumulated stones by rotating when stones are accumulated between the bendable sheath and the inner core, thereby dredging the suction channel, and improving the stone discharge efficiency, i.e., the inner core can complete the stone blockage removal work without being withdrawn, thereby reducing the time for solving the stone blockage problem and increasing the stone discharge efficiency.

Another advantage of the present invention is to provide a bending type combined ureteroscope in which a stone discharge passage is formed by using a space between the inner core and the inner wall of the bendable sheath to discharge stones, thereby improving space utilization and facilitating the discharge of stones.

An advantage of the present invention is that it provides a flexible combined ureteroscope, wherein an outer sheath of the flexible combined ureteroscope actively turns to drive an inner core assembly to turn, the inner core assembly can rotate and be drawn out to break stones with a branchlet angle, and broken stones can be sucked out through a gap between the outer sheath and the inner core assembly, so as to avoid blockage and facilitate stone breaking and stone removal.

Another advantage of the present invention is that it provides a curved combination ureteroscope having an outer sheath that can be advanced through an introducer sheath into the interior of the renal pelvis of the body such that debris can be aspirated through a gap between the outer sheath and the inner core assembly.

Another advantage of the present invention is that it provides a curved modular ureteroscope having a negative pressure aspiration channel and a irrigation channel that ensure proper ratio to ensure pressure balance inside the body during infusion and aspiration to ensure safe performance of the procedure.

Another advantage of the present invention is to provide a bending type combined ureteroscope, which includes a control unit and a traction unit, wherein the control unit adjusts an external force applied by the traction unit to the outer sheath, so as to achieve an active turning of the outer sheath, and the inner core assembly turns passively, and the bending type combined ureteroscope is capable of being operated with one hand, is simple and convenient, and can freely adjust a direction, so that an adjustable suction main body can prop into a dead angle to suck a lesion therein, and also can reduce a risk of infection.

Another advantage of the present invention is to provide a flexible combined ureteroscope, which further comprises a sealing cap disposed at an end of the outer sheath, wherein when the outer sheath and the inner core assembly are fixedly connected to each other, the sealing cap seals a joint between the outer sheath and the inner core assembly, so as to prevent external air from entering, resulting in a difference between internal and external air pressures, which may affect the suction of crushed stones.

Another advantage of the present invention is that it provides a curved combined ureteroscope, the core assembly of which includes a camera and a light source and a working channel, the camera and the light source are disposed at the front end of the core assembly, so as to minimize the volume occupied by the camera and the light source, and further make the volume of the negative pressure suction channel large enough to facilitate the suction and discharge of the crushed stones.

Another advantage of the present invention is to provide a curved combined ureteroscope, wherein an imaging device is connected to an exterior of the curved combined ureteroscope, and images collected by the camera can be transmitted to the imaging device in real time, so that the whole procedure of the operation can be visualized, the risk of the operation is greatly reduced, and the convenience of the operation is increased.

Another advantage of the present invention is to provide a bending type combination ureteroscope, wherein the outer side of a bending portion of the outer sheath is covered with a film, which can prevent the slit of the surface of the bending portion from being blocked to affect the bending of the bending portion, wherein the film has a certain elasticity and does not affect the bending of the bending portion.

Another advantage of the present invention is that it provides a curved modular ureteroscope with the outer sheath and inner core components being flexible to facilitate access to the patient's kidney, and the curve can be repeatedly switched between curved and upright positions to reach different positions to meet clinical needs.

Another advantage of the present invention is that it provides a curved modular ureteroscope having a cylindrical outer sheath assembly, a smooth surface, and is atraumatic, which does not cause injury to the patient during use, and which facilitates the protection of vital structures and blood vessels within the patient's body.

In one aspect, the present invention provides a curved combination ureteroscope which can achieve the foregoing and other objects and advantages, comprising:

a flexible sheath including a bending member and a sheath main body extending from one end of the sheath operating portion, and a sheath operating portion, the bending member being connected to the sheath main body and remote from the sheath operating portion; and

the inner core comprises an inner core main body and an inner core connecting part, wherein the inner core main body extends from one end of the inner core connecting part and penetrates through the sheath operating part to be positioned in the sheath main body, so that the inner core connecting part is connected with the sheath operating part in a sealing manner.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

Drawings

Fig. 1 is a schematic view showing the overall structure of the curved combination ureteroscope according to a preferred embodiment of the present invention.

Fig. 2 is a schematic view showing the overall structure of the flexible sheath and the inner core of the bending type combination ureteroscope according to the preferred embodiment of the present invention.

Fig. 3 is a schematic view of the overall structure of the bendable sheath of the bending type combination ureteroscope according to the above preferred embodiment of the present invention after the hydrophilic coating film is removed.

Fig. 4 is a schematic view showing the bending state of the bendable sheath of the bending type combination ureteroscope according to the preferred embodiment of the present invention.

Fig. 5 is a schematic end structure view of the inner core main body of the bending type combined ureteroscope according to the above preferred embodiment of the invention.

Fig. 6 is a schematic structural view of the end part of the inner core of the bending type combined ureteroscope, which is arranged behind the bending sheath, according to the preferred embodiment of the invention.

Fig. 7 is a schematic view showing the overall structure of the guide of the curved modular ureteroscope according to the above preferred embodiment of the present invention.

Fig. 8 is a schematic view showing the installation state of the guide of the bending type ureteroscope according to the above preferred embodiment of the present invention, which is installed on the bendable sheath.

Fig. 9 is a schematic view showing the overall structure of the flexible sheath with the inner core installed after the guide member of the flexible combined ureteroscope is withdrawn from the flexible sheath according to the preferred embodiment of the present invention.

Fig. 10 is a partial sectional view of the sheath body of the bending type combined ureteroscope according to the above preferred embodiment of the present invention, showing the structure of the sheath body.

Fig. 11 is an alternative structure of the sheath body of the curved combination ureteroscope according to another preferred embodiment of the present invention.

Fig. 12 is a sectional view of the flexible sheath of the curved combination ureteroscope according to another preferred embodiment of the present invention, showing an alternative structure of the snake bone.

Fig. 13 is another embodiment of the pull wire of the curved combination ureteroscope according to another preferred embodiment of the present invention.

Fig. 14 is another embodiment of the pull wire of the curved combination ureteroscope according to another preferred embodiment of the present invention.

Figure 15 is a schematic view of the overall structure of a curved modular ureteroscope according to another preferred embodiment of the present invention.

Figure 16 is an enlarged partial view of a curved combination ureteroscope according to another preferred embodiment of the present invention.

Figure 17 is a schematic view of the internal structure of the outer sheath of a curved combination ureteroscope according to another preferred embodiment of the present invention.

Figure 18 is a schematic view of the outer sheath of a curved combination ureteroscope according to another preferred embodiment of the present invention in a curved state.

Fig. 19 is a schematic structural view of an introducer sheath of a curved combination ureteroscope according to another preferred embodiment of the present invention.

Figure 20 is a schematic view of the overall structure of the inner core assembly of a curved modular ureteroscope according to another preferred embodiment of the present invention.

Fig. 21 is a view showing the combination of the guide sheath and the outer sheath of a bending type combined ureteroscope according to another preferred embodiment of the present invention.

FIG. 22 is a schematic view of the combination of the outer sheath and inner core assembly of a curved combination ureteroscope, according to another preferred embodiment of the present invention.

Fig. 23 is one of the use views of a curved combination ureteroscope according to another preferred embodiment of the present invention.

Figure 24 is a second view of a curved combination ureteroscope according to another preferred embodiment of the present invention during use.

Fig. 25 is a third view of a curved modular ureteroscope, according to another preferred embodiment of the present invention, in use.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The underlying principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and simplicity in description, but do not indicate or imply that the device or component being referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular manner of operation, and thus, the terms are not to be construed as limiting the invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

The first embodiment is as follows:

referring to fig. 1 to 10, the curved modular ureteroscope according to a preferred embodiment of the present invention is illustrated.

The curved modular ureteroscope 6 is used in kidney stone removal procedures, particularly for removal of stones through the ureter into the kidney or ureter, and it will be appreciated by those skilled in the art that the curved modular ureteroscope 6 may also be used in other procedures.

The bending type combined ureteroscope 6 is a whole after the installation is completed, that is to say, a doctor can complete operations such as negative pressure suction and bending control with one hand, so that the workload of the doctor during the operation is reduced, and the integrated bending type combined ureteroscope 6 can be used for operation operations which are more concentrated by the doctor and reduce the operation difficulty of the doctor in the operation process.

The bending combined ureteroscope 6 operated by one hand can enable a doctor to conveniently adjust the operation position during operation, namely, when the doctor adjusts the operation position, the doctor only needs to consider the position relation between the bending combined ureteroscope 6 and a patient and the position relation between the doctor and the bending combined ureteroscope 6, and the relative position relation between a sheath tube and a ureter body is not needed to be considered during traditional operation, so that the difficulty in adjusting the bending combined ureteroscope 6 is reduced.

The bending type combined ureteroscope 6 can also effectively prevent calculi from being blocked in the bending type combined ureteroscope 6, so that the problem that calculi can be dredged only by drawing out the endoscope body after the calculi are blocked in the traditional operation is solved.

The front end of the bending type combined ureteroscope 6 can be bent, namely can be bent in the renal pelvis of a patient and can be cleaned to a place which cannot be reached in the traditional stone operation, so that stones in the corner of the renal pelvis are cleaned and are sucked out of the body.

In detail, the bending type combined ureteroscope 6 can comprise a bendable sheath 61 and an inner core 62, wherein the inner core 62 is hermetically and detachably connected with the bendable sheath 61, and is integrated after the inner core 62 is hermetically connected with the bendable sheath 61, that is, the bending type combined ureteroscope 6 is an integrated whole ureteroscope.

The bending type combined ureteroscope 6 as a whole ureteroscope integrates the operation of the inner core 62 and the position of the bendable sheath 61 needing to be operated through the combination of the inner core 62 and the bendable sheath 61, so that the operation is convenient for a doctor with one hand, the difficulty of the operation required by a doctor in an operation is reduced, meanwhile, the space is also made for the other hand of the doctor, and the energy of the doctor is saved.

The front end of the flexible sheath 61 is flexible, i.e., capable of flexing within the patient's renal pelvis to clear to a location inaccessible in conventional stone procedures, thereby removing stones from the corners of the renal pelvis and drawing them out of the body.

In detail, the flexible sheath 61 may include a bending member 610, a sheath main body 611 and a sheath operating portion 612, the sheath main body 611 extends from one end of the sheath operating portion 612 to a distal end to form an elongated conduit, and the bending member 610 is disposed at the distal end of the sheath main body 611.

The sheath body 611 is flexible and has a certain flexibility to adapt to the shape of the ureter of different patients, the cross section of the sheath body 611 can be made to be oval or round, and it should be understood by those skilled in the art that the cross section of the sheath body 611 can be other shapes, including but not limited to the shapes listed above.

The sheath main body 611 may include a sheath main body frame 6111 and a protective layer 6112, the protective layer is coated on the sheath main body frame 6111 to reduce the space between the protective layer 6112 and the sheath main body frame 6111 as much as possible, so as to reduce the diameter of the sheath main body 611, and the inner diameter of the sheath main body frame 6111 can be as large as possible under the same diameter of the sheath main body 611.

In this embodiment, the sheath main body skeleton 6111 is a snake bone skeleton, the protective layer 6112 is closely attached to the sheath main body skeleton 6111, the protective layer 6112 has certain toughness so as to bend along with the snake bone skeleton when bending, and the protective layer 6112 also has good wear resistance so as to bear relative movement between the snake bone skeleton and the protective layer 6112 when bending, so that the sheath main body skeleton 6111 and the protective layer 6112 are not easily damaged when rubbing against each other.

The bending member 610 is disposed at a distal end of the sheath main body 611, that is, an end away from the sheath operating portion 612. The bending assembly 610 can bend in two directions and cooperate with axial rotation of the sheath operating portion 612 to substantially form an omnidirectional spatial coverage to enable access to different locations in the renal pelvis, i.e., to stones located in a dead space location in the renal pelvis.

The bending component 610 can complete the stone crushing and suction work through the cooperation with the inner core 62, that is, the bending type combined ureteroscope 6 can perform bending and suction with the help of the bending component 610, so that the stone is crushed and discharged out of the body.

In detail, the bending assembly 610 includes a snake bone portion 6101 and a pair of cables 6102, the snake bone portion 6101 is disposed at a distal end of the sheath main body 611, that is, at an end away from the sheath operating portion 612, each section of the snake bone portion 6101 can be bent at a certain angle, and the cables 6102 are symmetrically disposed at two sides of the snake bone portion 6101 and extend to the sheath operating portion 612 along the sheath main body 611.

The snake bone portion 6101 further includes a head snake bone unit 61011, at least one middle snake bone unit 61012, and a connecting snake bone unit 61013, the connecting snake bone unit 61013 is connected to the sheath main body skeleton 6111 of the sheath main body 611, the middle snake bone unit 61012 is connected to the connecting snake bone unit 61013 in an end-to-end manner, the head snake bone unit 61011 is connected to the other end of the middle snake bone unit 61012, that is, the end far from the connecting snake bone unit 61013, in other words, the mounting position of the head snake bone unit 61011 is far from the sheath operating portion 612 so as to be at the far end of the sheath main body 611.

Particularly, the lengths of the middle snake bone units 61012 may be different, when the short middle snake bone units 61012 are sequentially connected to each other, and when each section of the middle snake bone units 61012 is bent at the same angle, the head of the middle snake bone unit 61012 of one section is closer to the head of the middle snake bone unit 61012 of another section due to the relationship of the length of the snake bones thereof, that is, the head has a larger bending radius. When the longer middle snake bone units 61012 are connected and bent in sequence, when each section of the middle snake bone units 61012 is bent at the same angle, the head of the middle snake bone unit 61012 of one section is far away from the head of the middle snake bone unit 61012 of another section due to the length relationship of the snake bones, that is, the head has a smaller bending radius.

By the cooperation of the middle snake bone units 61012, the snake bone portions 6101 with inconsistent bending degree can be formed, so as to adapt to the bending degree actually required in the operation.

The inhaul cable 6102 comprises a traction wire 61021 and a sleeve 61022, the sleeve 61022 extends from the sheath operating part 612 to the connecting position where the sheath main body framework 6111 is connected with the connecting segment snake bone unit 61013, one end of the traction wire 61021 is fixed at two sides of the head end snake bone unit 61011, and the other end passes through the sleeve 61022 and is connected with the sheath operating part 612.

The sleeve 61022 is attached to the sheath main body 611, and the sleeve 61022 may be disposed between the protective layer 6112 and the sheath main body skeleton 6111, or disposed on the outer surface of the protective layer 6112 and attached to the protective layer 6112. The traction wire 61021 is arranged in the middle of the casing 61022, and is attached to the connection snake bone unit 61013 and the middle snake bone unit 61012 all the way until being fixed to the head end snake bone unit 61011.

The cable 6102 is symmetrically disposed on two sides of the snake bone portion 6101, by controlling the pull wire 61021 on one side to move, that is, the pull wire 61021 on one side moves toward the sheath operating portion 612, the pull wire 61021 on the one side has a tendency to shorten, so as to generate a contracting force to drive the snake bone portion 6101 to bend, and the pull wire 61021 on the other side can properly extend to limit the bending degree of the pull wire 61021 on the one side, in other words, when the pull wire 61021 on the one side shortens and bends, the pull wire 61021 on the other side is tightened, and the bending with the rigidity and the bending degree of the snake bone portion 6101 itself is matched, so as to complete the bending with a controllable angle. The bending degree of the snake bone part 6101 is controlled by continuously adjusting the length of the pull wire 61021 at both sides.

The hardness and toughness of the sleeve 61022 are greater than those of the pull wire 61021, so that when the pull wire 61021 is subjected to the same amount of tension, the degree of bending of the pull wire 61021 is greater than that of the sleeve 61022, so as to achieve controlled bending of the snake bone 6101.

The sheath operating portion 612 further includes a sheath body 6121 and a bending control member 6122, the sheath body 611 is mounted on the sheath body 6121, the pull cable 6102 is connected to the bending control member 6122 and controlled by the bending control member 6122, the bending control member 6122 is mounted on the sheath body, and the mounting position is suitable for the position which can be covered by the thumb of the person, so that the control by the fingers of the doctor is convenient when the doctor operates the sheath.

The bending control member 6122 is connected with the cables 6102 at two sides, and can control the cables 6102 at the same time, that is, when the cable 6102 at one side contracts and moves, the cable 6102 at the other side extends, and the cable 6102 is always kept in a tight state, so as to fix the snake bone portion 6101 during bending, thereby ensuring that the angle of bending of the snake bone portion 6101 can be kept accurate during bending.

The sheath body 6121 further has a suction channel 6123, the suction channel 6123 is opened at one side of the sheath body 6121 and forms a certain angle with the sheath body 6121, the suction channel 6123 is communicated with and extends into the sheath main body 611 and is communicated with the inner space of the sheath main body 611, that is, the suction channel 6123 can extend from the head end snake bone unit 61011 of the snake bone part 6101 to the suction channel 6123, so as to suck out the stones located at the head end snake bone unit 61011. The suction channel 6123 can be connected with a suction apparatus to suck stones in operation.

The sheath body 6121 further has a sealing butt-joint hole 6125, the sealing butt-joint hole 6125 is arranged at the tail end of the sheath body 6121 and is positioned on the same axis with the sheath main body 611 framework, that is, the sealing butt-joint hole 6125 can be directly communicated with the inner space of the sheath main body 611.

It is worth mentioning that the sealing and docking hole 6125 is used for the inner core 62 to pass through, and the sealing connection between the inner core 62 and the sheath operating part 612 can be maintained when the inner core 62 passes through the sealing and docking hole 6125, and the inner core 62 can be rotated in a sealing manner along the axis of the sealing and docking hole 6125.

The sheath body 6121 further has a first sealed docking end 6124, where the first sealed docking end 6124 is located at the tail of the sheath body 6121 and is far away from the head end snake bone unit 61011.

The sheath body 6121 further has a negative pressure suction adjusting hole 6126, and the negative pressure suction adjusting hole 6126 is communicated with the suction channel 6123. The negative pressure suction adjustment hole 6126 is provided near a position where the sheath main body 611 is connected to the sheath operating portion 612 so as to be accessible to the thumb of the operator.

The negative pressure suction adjusting hole 6126 is communicated with the suction channel 6123 to keep the pressure inside and outside the suction channel 6123 consistent, when the suction channel 6123 is connected with a negative pressure suction apparatus, air flow flows from the negative pressure suction adjusting hole 6126 to the negative pressure suction apparatus, the external pressure is consistent with the pressure in the suction channel 6123, when the negative pressure suction adjusting hole 6126 is blocked, the negative pressure suction apparatus extracts the gas in the suction channel 6123, the gas in the suction channel 6123 is reduced, the pressure is reduced, and therefore a negative pressure suction force is formed at the front end of the bending assembly 610, and stones can be sucked.

The bendable sheath 61 further comprises a hydrophilic coating film 613, the hydrophilic coating film 613 is disposed outside the sheath body 611 to coat the bending assembly 610 and the sheath body 611, and the hydrophilic coating film 613 is tightly attached to the sheath body 611, so as to reduce the diameter of the sheath body 611 as much as possible and cover the pull cable 6102 to prevent the bending assembly 610 from directly contacting the inner wall of the ureter of a patient.

The hydrophilic coating 613 can reduce the resistance of the flexible sheath 61 to enter along the ureter of the patient, i.e., reduce the sliding friction between the outer wall of the sheath main body 611 of the flexible sheath 61 and the inner wall of the ureter of the patient, so that the flexible sheath 61 can smoothly enter the renal pelvis along the ureter of the patient for the stone removal operation.

The inner core 62 includes an inner core main body 621 and an inner core connecting portion 622, the inner core main body 621 extending distally from the inner core connecting portion 622.

The inner core main body 621 is further provided with a perfusion channel 6211 and a first instrument channel 6213, wherein the perfusion channel 6211 and the first instrument channel 6213 are both arranged on the inner core main body 621 and are arranged along the axial direction of the inner core main body 621.

The inner core main body 621 further comprises a visible unit 6212 and a light source 6214, the visible unit 6212 is disposed at the distal end of the inner core main body 621, the light source 6214 is disposed beside the visible unit 6212, the first perfusion channel 6211 and the first instrument channel 6213 are opened in the inner core main body 621 in a penetrating manner, and an perfusion port and an instrument port are formed at the distal end of the inner core main body 621, and the perfusion port formed by the first perfusion channel 6211 and the instrument port formed by the first instrument channel 6213 are disposed at the distal end of the inner core main body 621 together with the visible unit 6212 and the light source 6214.

The inner core main body 621 is soft and has a certain flexibility so as to be inserted into the space formed by the sheath main body 611 from the sealing and abutting hole 6125 of the sheath operating part 612.

It is worth mentioning that the diameter of the inner core main body 621 is smaller than that of the sheath main body 611, so that after the inner core main body 621 is inserted into the sheath main body 611, a certain space is provided between the outer wall of the inner core main body 621 and the inner wall of the sheath main body 611 to facilitate the inner core main body 621 moving in the sheath main body 611.

The perfusion channel 6211 is used for perfusing liquid to wash the stones into the kidney, ensuring a clear view of the visualization unit 6212. The first instrument channel 6213 can be used for installing holmium laser to perform laser lithotripsy, the liquid flowing out of the perfusion channel 6211 can also cool down the stones broken by the holmium laser, and the stones broken by the holmium laser are sucked out through the gap between the inner core main body 621 and the sheath main body 611, that is, through the suction channel 6123.

The visualization unit 6212 may be a fiberscope or an electronic mirror, and it should be understood by those skilled in the art that the visualization manner of the visualization unit 6212 includes, but is not limited to, the manners listed above.

The inner core connecting part 622 is connected to the inner core main body 621, the inner core connecting part 622 has a circuit passage 6221, a liquid filling passage 6222 and a second instrument passage 6223, the circuit passage 6221 and the liquid filling passage 6222 are respectively opened at two sides of the inner core connecting part 622, the circuit passage 6221 is communicated with the visible unit 6212 and the light source 6214, the second instrument passage 6223 is formed by extending the first instrument passage 6213 from the inner core 62 rearward of the inner core connecting part 622 away from the distal direction of the inner core main body 621, that is, the first instrument passage 6213 and the second instrument passage 6223 are located on the same axis, and holmium laser can enter the first instrument passage 6213 from the second instrument passage 6223 and is arranged at the distal end of the inner core main body 621 for working.

The liquid filling passage 6222 is communicated with the filling passage 6211 and is suitable for filling liquid into the liquid filling passage 6222 from the outside and filling the liquid into the kidney through the filling passage 6211 so as to wash out stones, ensure clear visual field during operation and cool down stones broken by holmium laser.

The circuit path 6221 is used for data transmission and power supply transmission, and transmits power to the light source 6214 and transmits data of the visual unit 6212 to the outside for use by a doctor.

It is worth mentioning that the inner core connecting portion 622 further includes a second sealing abutting end 6224, the second sealing abutting end 6224 is located at a position where the inner core main body 621 is connected to the inner core connecting portion 622, and after the inner core main body 621 passes through the sealing abutting hole 6125 of the sheath operating portion 612, the second sealing abutting end 6224 is attached to the first sealing abutting end 6124, so as to connect the inner core connecting portion 622 to the sheath operating portion 612 in a sealing manner, that is, the inner core 62 and the bendable sheath 61 are combined to form a whole, thereby facilitating one-hand operation of a doctor and reducing the difficulty of the doctor in operation. Specifically, the inner ring of the sealing and abutting hole 6125 may be provided with an elastic tissue material, such that the inner diameter of the sealing and abutting hole 6125 is slightly smaller than the outer diameter of the inner core main body 621, and thus when the inner core main body 621 passes through the sealing and abutting hole 6125, the outer wall of the inner core main body 621 presses and contacts the elastic tissue material of the inner ring of the sealing and abutting hole 6125.

It can be understood that the mutual pressing of the outer wall of the inner core body 621 and the elastic tissue material of the inner ring of the sealing and abutting hole 6125 can prevent the gas or liquid from leaking out of the sealing and abutting hole 6125, that is, the inner core body 621 and the sealing and abutting hole 6125 are connected in a sealing way, and the inner core body 621 can also rotate freely along the axis of the inner core body 621 in the sealing and abutting hole 6125.

The length of the sheath body 611 plus the length of the snake bone 6101 is exactly the same as the length of the inner core body 621, that is, when the first sealed interface 6124 is interfaced with the second sealed interface, the distal end of the inner core body 621 is located at the middle position of the head end snake bone unit 61011. Thereby causing the inner core main body 621 to bend when the snake bone portion 6101 bends.

The bending type combined ureteroscope 6 further comprises a guide member 63, and the guide member 63 is used for guiding the bending sheath 61 to be placed in the kidney of the patient. In other words, the guide 63 can be inserted through the sealing interface hole 6125 of the sheath operating portion 612 and exposed from the head end snake unit 61011.

In detail, the guiding element 63 includes a guiding tip 631, a guiding middle section 632 and a restraining tail 633, and the guiding tip 631 and the restraining tail 633 are respectively mounted at two ends of the guiding middle section 632.

The diameter of the guide 63 is slightly smaller than that of the sheath body 611, the diameter of the restraining tail 633 is larger than that of the sealing interface hole 6125 when the guide tip 631 of the guide 63 is inserted into the sealing interface hole 6125 and exposed from the head snake bone unit 61011, and therefore the restraining tail 633 restrains the guide 63 from further movement after the guide tip 631 is exposed from the head snake bone unit 61011. The guide 63 is flexible and flexible to accommodate the anatomy of the patient's ureter.

The end of the curved combination ureteroscope 6 is flat to facilitate the stone removal task, but does not facilitate access to the renal pelvis along the patient's ureter, thus requiring the guide 63 to assist in accessing the patient's kidney.

In operation of the curved modular ureteroscope 6, the guide 63 is inserted into the flexible sheath 61 and the guide tip 631 is exposed from the head end snake 61011 of the flexible sheath 61, the guide tip 631 having a smooth tip to facilitate separation of body tissue from the patient ureter into the renal pelvis region. After the guiding element 63 guides the bendable sheath 61 to enter a predetermined position, the guiding element 63 is drawn out of the bendable sheath 61, the inner core 62 inserts the inner core main body 621 into the sheath main body 611 along the sealing abutting hole 6125, the second sealing abutting end is connected with the first sealing abutting end 6124 in a sealing manner, and the inner core 62 and the bendable sheath 61 form a whole, so that the operation of a doctor is facilitated.

Holmium laser is sent to the far end of the inner core main body 621, namely the head end snake bone unit 61011 through the second instrument channel 6223 and the first instrument channel 6213 for laser lithotripsy. The visualization unit 6212 provides a visual field at the distal end of the inner core body 621 under the irradiation of the light source 6214, i.e., can see the calculus portion clearly, and transmits visual field data through the circuit passage 6221.

Liquid is conveyed to the far end of the inner core main body 621, namely the head end snake bone unit 61011, through the liquid filling channel 6222 and the liquid filling channel 6211 so as to flush stones, cool down stones broken by holmium laser and ensure clear visual field of operation.

The flushed stones are sucked by the suction channel 6123, and the suction channel 6123 sucks the stones and the perfused liquid together to maintain the internal pressure of the kidney.

It is worth mentioning that the bending assembly 610 controls the bending of the bendable sheath 61 to reach different positions in the renal pelvis, i.e. to remove stones in various dead spaces in the kidney, thereby cleaning the stones more cleanly.

In particular, the stone is discharged through the space between the outer wall of the inner core 62 and the inner wall of the sheath body 611, after a large amount of stone is discharged, the space between the outer wall of the inner core 62 and the inner wall of the sheath body 611 is blocked, at this time, the inner core 62 can axially rotate in the flexible sheath 61, so that when the stone is accumulated between the flexible sheath 61 and the inner core 62, the accumulated stone is dispersed to the periphery through rotation, the accumulated stone volume is reduced, the suction channel 6123 is further dredged, the stone discharge efficiency is improved, that is, the inner core 62 can complete the work of clearing the stone blockage without being drawn out, the time for solving the problem of stone blockage is reduced, and the stone discharge efficiency is improved.

Reference is made to fig. 11, which is an alternative structure of the sheath body 611 of the curved combination ureteroscope 6 according to the first preferred embodiment of the present invention.

Unlike the first embodiment, the sheath body skeleton 6111A is a spiral metal ring, the cross section of the sheath body skeleton 6111A can be circular, quadrangular or other shapes, and those skilled in the art will understand that the cross-sectional shape of the sheath body skeleton 6111A includes but is not limited to the above listed shapes.

The number of turns of the spiral winding of the sheath body skeleton 6111A and the interval between each turn can be different, that is, the sheath body skeleton 6111A can be dense a little by one section winding, the interval between each turn is close to a little, the number of turns of the spiral at one end can be a little less, the interval between each turn is a little greater, so as to adjust the bending performance of the sheath body skeleton 6111A.

The protective layer 6112 is closely attached to the sheath main body framework 6111A, the protective layer 6112 has certain toughness so as to bend along with the snake bone framework when the snake bone framework bends, and the protective layer 6112 also has good wear resistance so as to bear relative movement generated by the snake bone framework and the protective layer 6112 when the snake bone framework bends, so that the sheath main body framework 6111A and the protective layer 6112 are not easy to damage when in mutual friction.

Referring to fig. 12, there is shown an alternative structure of the snake bone 6101 of the curved combination ureteroscope 6 according to the first preferred embodiment of the present invention.

Unlike the first embodiment, the snake bone portion 6101 is replaced with the spiral portion 6101A. The spiral portion 6101A may be a spring having a cross-section that is circular, rectangular, or other shape, and those skilled in the art will appreciate that the cross-sectional shape of the spiral portion 6101A includes, but is not limited to, the above-listed shapes.

The number of turns of the spiral portion 6101A and the distance between each turn may be different, that is, the spiral portion 6101A may be densely wound by one section, the distance between each turn is close to one point, or the number of turns of the spiral portion at one end is smaller and the distance between each turn is larger, so as to adjust the bending performance of the spiral portion 6101A.

The traction wire 61021 is symmetrically disposed at two sides of the spiral portion 6101A, and the end portions of the traction wire 61021 are fixed at the end portion of the spiral portion 6101A, so that the spiral portion 6101A can be controlled by the traction wire 61021 to bend, and then reach different positions in the renal pelvis, that is, stones at each dead angle in the kidney can be removed, and the stones can be removed more cleanly.

Referring to fig. 13, another embodiment of the pulling wire 61021 of the curved combination ureteroscope 6 according to another preferred embodiment of the present invention is shown.

Different from the third embodiment, the number of the traction wires 61021 is three, that is, the direction in which the traction wires 61021 pull the inner core main body 621 to rotate is increased, the inner core main body 621 can rotate in six directions through the traction wires 61021, so that the adaptability of the inner core main body 621 is increased, that is, in a renal calyx with a more complicated lumen, the inner core main body 621 can better remove renal calculus, and then through the rotation in the axial direction of the inner core main body 621, the omnidirectional rotation can be realized.

Referring to fig. 14, another embodiment of the pulling wire 61021 of the curved combination ureteroscope 6 according to another preferred embodiment of the present invention is shown.

Unlike the third embodiment, the number of the traction wires 61021 is four, that is, the direction in which the traction wires 61021 pull the inner core body 621 to rotate is increased, the inner core body 621 can realize unidirectional rotation in eight directions through the traction wires 61021, and the adaptability of the inner core body 621 is increased greatly, that is, in the case of facing a more complicated lumen environment, the inner core body 621 can better adapt to the environment of the renal lumen, so as to better remove kidney stones.

And then the omnidirectional rotation is realized through the self axial rotation or the linkage bending of the traction wires 61021. In detail, the bending degree of the adjacent traction wires 61021 at the same time may be different, so that when the traction wires 61021 are contracted and bent, the inner core 621 is driven to realize bending at different angles, thereby achieving and realizing omnidirectional rotation. That is, the patient can be bent properly and effectively in the complicated renal pelvis space and can be cleaned to the place which can not be reached in the traditional stone operation, thereby cleaning the stones in the corners of the renal pelvis and sucking the stones out of the body.

Referring to fig. 15-25, a curved modular ureteroscope according to a preferred embodiment of the present invention is illustrated. In this embodiment, curved type combination formula ureteroscope 1 adopts different modes, realizes curved type combination formula ureteroscope 1's can attract function, a sheath initiative turn of curved type combination formula ureteroscope 1 is in order to drive an inner core subassembly turn, the inner core subassembly is rotatable, but the extract, the rubble accessible the sheath with clearance suction between the inner core subassembly avoids causing the jam, is favorable to carrying out rubble, stone discharging.

For convenience of explanation, in the embodiment of the present invention, after the curved modular ureteroscope 1 is inserted into a patient, a portion of the curved modular ureteroscope 1 on a side of a kidney K of the patient is used as an anterior side of the curved modular ureteroscope 1, and a portion of the curved modular ureteroscope 1 on a side opposite to the anterior side thereof is used as a posterior side thereof.

Specifically, the bending type combined ureteroscope 1 comprises a guide sheath 10, an outer sheath 20 and an inner core component 30, when the bending type combined ureteroscope 1 enters the kidney K of a human body, the guide sheath 10 is firstly inserted into the outer sheath 20, the outer sheath 20 is sent into the kidney K of the human body through the guidance of the guide sheath 10, and then the guide sheath 10 is taken out and the inner core component 30 is inserted for operation. It should be noted that, in the present application, after the curved combined ureteroscope 1 enters the kidney K of the human body, the outer sheath 20 and the inner core assembly 30 are combined with each other, so that the curved combined ureteroscope 1 can be operated by a single hand of a medical worker, which is convenient for the operation process. Meanwhile, in the present embodiment, the outer sheath 20 has an inner diameter F9 and an outer diameter F11, so as to conform to the structure of the human body, facilitate the flexible combined ureteroscope 1 to enter a focus in the human body, and perform suction and discharge of crushed stones.

Further, blind insertion is typically used by medical personnel when inserting the introducer sheath 10. Also, the introducer sheath 10 further includes a wedge-shaped tip 12 to facilitate entry of the introducer sheath 10 into the patient to the location of the kidney K.

Based on this, the guide sheath 10, the outer sheath 20 and the inner core component 30 of the bending type combined ureteroscope 1 are all provided with cylindrical shapes, the surfaces are smooth, no wound is caused, no harm is caused to a patient in the using process, and the protection of important structures, blood vessels and the like in the body of the patient is facilitated.

The sheath 20 includes a sheath main body 21 and an operating portion 22, and the operating portion 22 is attached to an end of the sheath main body 21. In the present application, the outer sheath 20 is configured to flex to cause the inner core assembly 30 to flex. The inner core assembly 30 is rotatable and withdrawable, so that stones can be crushed and attracted conveniently.

The sheath body 21 includes a bending portion 211, a fixing portion 212, and a main passage 213, the bending portion 211 integrally extends upward from the upper end of the fixing portion 212, and the main passage 213 is disposed inside the sheath body 21 to facilitate insertion of the core assembly 30. In other words, the bending portion 211 is provided at the front end of the sheath body 21, and the fixing portion 22 is provided at the distal end of the sheath body 21 to connect the operating portion 22.

The outer side of the bending part 211 of the outer sheath main body 21 is covered with a coating 2111, so that the bending hole on the surface of the bending part can be prevented from being blocked to influence the bending of the bending part, wherein the coating 2111 has certain elasticity and cannot influence the bending of the bending part.

It is worth mentioning that in one embodiment of the present application, the bending part 211 is preferably made of a snake bone, and the fixing part 212 is preferably made of a coil spring. That is, when the bending type ureteroscope 1 is used, the bending part 211 is suitable to be controlled to be bent, and the fixing part 212 needs to have certain strength and certain bending resistance, so that the fixing part 212 is prevented from being bent due to the action of traction force when the bending part 211 is bent.

Accordingly, the bending part 211 and the fixing part 212 need to be manufactured in different structures. Specifically, in some embodiments of the present application, the bending portion 211 is made of a snake bone, and the fixing portion 212 is preferably made of a spring coil, and in some embodiments of the present application, the bending portion 211 is made of a spring coil, and the fixing portion 212 is preferably made of a snake bone. Further, when the bending part 211 and the fixing part 212 are made of the same material, the material density of the fixing part 212 is greater than that of the bending part 211, so that the fixing part 212 has stronger strength. That is, when the bending portion 211 and the fixing portion 212 are both supported internally with the spring coils, the spring coil density of the fixing portion 212 is greater than that of the spring coils inside the bending portion 211.

Based on this, it should be understood by those skilled in the art that the materials and structures of the bending part 211 and the fixing part 212 are not limited to the present invention, as long as the purpose of bending and convenient operation can be achieved.

The operation portion 22 includes a control unit 221 and a traction unit 222, the control unit 221 is disposed on the surface of the operation portion 22, the traction unit 222 is disposed on the bending portion 211 of the sheath main body 21, that is, the control unit 221 can be used by a medical staff to operate the traction unit 222, so as to control the bending portion 211 of the sheath main body 21 to bend.

Further, in this embodiment, the control unit 221 includes a first control member 2211 and a second control member 2212, the traction unit 222 includes a first traction member 2221 and a second traction member 2222, the first traction member 2221 is connected to the first control member 2211 at one end and connected to the left side of the front end of the bending portion 211 of the sheath body 21 at the other end, and the second traction member 2222 is connected to the second control member 2212 at one end and connected to the right side of the front end of the bending portion 211 of the sheath body 21 at the other end. The medical staff can control the degree of tightness of the first traction member 2221 and the second traction member 2222 by the first control member 2211 and the second control member 2212, respectively, so as to control the bending of the bending portion 211 of the outer sheath body 21, thereby driving the bending of the inner core assembly 30. It should be understood by those skilled in the art that the number of the control unit 221 and the traction unit 222 is not a limitation of the present invention.

It is worth mentioning that the first pulling member 2221 and the second pulling member 2222 are symmetrically provided at both sides of the curved portion 211 of the sheath body 21, and the ends of the first pulling member 2221 and the second pulling member 2222 are flush. In the preferred embodiment, the sheath body 21 has a mounting groove on both sides of the bending part 211, and the first traction member 2221 and the second traction member 2222 are preferably mounted inside the mounting grooves, so that the core assembly 30 is not affected by the traction unit 222 after entering the sheath 20, and the traction unit 222 does not occupy the space of the main channel 213 of the sheath 20. Based on this, the pulling unit 222 may be attached to the surface of the bending portion 211 of the sheath main body 21. It will be understood by those skilled in the art that the first traction elements 2221 and the second traction elements 2222 may be provided inside the outer sheath 20 or attached to the outer wall of the outer sheath 20 without affecting the use, and thus the installation position of the traction unit 222 is not a limitation of the present invention.

More particularly, when the medical staff is performing the operation, the extension and contraction of the traction unit 222 can be controlled by the control unit 221, so as to control the bending of the outer sheath 20. In other words, the degree of bending of the sheath 20 is adjusted by the control unit 221 adjusting the external force applied to the bending portion 211 of the sheath 20 by the traction unit 22. Further, when the first traction member 2221 is shortened, the front portion of the bending portion 211 of the sheath main body 21 is driven to bend leftward, and when the second traction member 2222 is shortened, the front end portion of the bending portion 211 of the sheath main body 21 is driven to bend rightward, so that the capability of bending the sheath 20 to different directions is realized, and further, the bending of the inner core assembly 30 is controlled. In the process of holding, the medical staff can operate the first traction part 2221 and the second traction part 2222 with one hand, which is simple and convenient.

Based on this, the outer sheath 20 and the inner core assembly 30 have strong flexibility to enter the kidney K of the patient, and the bending portion 211 can be repeatedly switched between the bending state and the standing state for a plurality of times, so as to reach different positions, thereby meeting clinical requirements.

The sheath 20 further has a negative pressure suction channel 23 and a negative pressure regulating port 24, the negative pressure regulating port 24 is disposed on the operation portion 22, and the negative pressure regulating port 24 communicates with the negative pressure suction channel 23. Specifically, in the present embodiment, the negative pressure suction passage 23 is provided between the sheath main body 21 and the core assembly 30, that is, when the core assembly 30 is inserted into the main passage 213 of the sheath 20, the crushed stone is sucked through the gap between the sheath 20 and the core assembly 30, that is, the negative pressure suction passage 23. Meanwhile, the medical staff can adjust the pressure in the negative pressure suction channel 23 through the negative pressure adjusting port 24 so as to better suck and discharge the broken stones.

The sheath 20 further has an auxiliary channel 25, the auxiliary channel 25 is disposed inside the operation portion 22, specifically, the auxiliary channel 25 is recessed from the surface of the operation portion 22, and the auxiliary channel communicates with the main channel 213 of the sheath main body 21. The inner core assembly 30 can be inserted into the main channel 213 of the outer sheath main body 21 by entering the auxiliary channel 25, so that the inner core assembly 30 and the outer sheath 20 are fixed together, thereby facilitating the operation of medical staff. Meanwhile, the inner core assembly 30 can rotate or be drawn out from the main channel 213 to break stones at the drilling angle, and broken stones can be sucked out through a gap between the outer sheath and the inner core assembly, so that blockage is avoided, and the stone breaking and removing are facilitated.

Specifically, the inner core assembly 30 does not rotate from the central axis of the main channel 213 of the outer sheath body 21 when rotating, i.e., the inner core assembly 30 is not symmetrical, and stones that attract various angles can be fragmented by rotation of the inner core assembly 30 from the main channel 213 and active turning of the outer sheath 20.

The sheath 20 further comprises a sealing cap 26, the sealing cap 26 is disposed at an end of the operation portion 22, and when the sheath 20 and the core assembly 30 are fixedly connected to each other, the sealing cap 26 seals a connection portion of the sheath 20 and the core assembly 30, so as to prevent external air from entering, resulting in a difference between internal and external air pressures, and affecting the attraction of broken stones. The sealing cap 26 is hollow, that is, the inner core assembly 30 is adapted to pass through the center of the sealing cap 26, so that the inner core assembly 30 can enter the main channel 213 of the outer sheath body 21, and the sealing cap 26 can seal the gap between the outer sheath 20 and the inner core assembly 30 after the inner core assembly 30 enters the main channel 213, thereby preventing the entry of external air, which causes the difference between the internal air pressure and the external air pressure, and thus, the influence on the attraction of the crushed stone.

The core assembly 30 includes a core body 31 and a connecting portion 32, the connecting portion 32 is fixedly connected to an end of the core body 31, after the bending type combination ureteroscope 1 enters the kidney K of the patient, the outer sheath 20 and the core assembly 30 are fixed to be an integral structure, that is, the outer sheath 20 is sleeved outside the core assembly 30, the outer diameter of the operating portion 22 of the outer sheath 20 is set to be smaller than the outer diameter of the connecting portion 32, so that the operating portion 22 can be clamped to the upper end of the connecting portion 32, and the outer diameter of the core body 31 is set to be smaller than the outer diameter of the outer sheath main body 21, based on which the outer sheath 20 can be completely sleeved outside the core assembly 30, so that the outer sheath 20 and the core assembly are fixed to be an integral structure.

The core body 31 is provided with a water filling channel 311, and comprises a camera 312 and a light source component 313, the water filling channel 311 is arranged inside the core body 31, the camera 312 and the light source component 313 are arranged on the front end surface of the core body 31, the camera 312 is suitable for being electrically connected to an external imaging device, so that when the bending type combined ureteroscope 1 enters the body of a patient, images collected by the camera 312 can be transmitted to the imaging device in real time, the whole operation process is visible, the risk of the operation is greatly reduced, and the convenience of the operation is increased.

Further, the negative pressure suction channel 23 and the irrigation channel 311 need to ensure a proper ratio, that is, the area ratio of the negative pressure suction channel 23 to the irrigation channel 311 is greater than three, so as to ensure that the internal pressure of the human body is balanced during the perfusion and the suction, and ensure the safe operation of the operation.

Further, the camera 312 and the light source assembly 313 are arranged at the front end of the core body 31, so that the volume occupied by the camera 312 and the light source assembly 313 is reduced to the minimum degree, and the volume of the negative pressure suction channel 23 is large enough, so that the broken stones are conveniently sucked and discharged, and blockage is avoided.

The connecting portion 32 has a water inlet 321, a working channel 322 and an electric circuit channel 323, the water inlet 321 is communicated with the water filling channel 311, the working channel 322 and the electric circuit channel 323 are both disposed inside the connecting portion 32, in other words, the working channel 322 and the electric circuit channel 323 are both recessed and extended from the surface of the connecting portion 32, the working channel 322 is used for the passage of surgical instruments, and the electric circuit channel 323 is used for the passage of the camera 312 and the light source assembly 313.

It is worth mentioning that the camera 312 comprises a camera electric wire 3121, and the camera electric wire 3121 is communicated with the external imaging device through the circuit channel 323, so that the medical staff can see the surgical process in real time, and the success rate of the surgery is increased. More specifically, the light source assemblies 313 are distributed on two sides of the camera 312 to provide sufficient illumination, that is, the light source assemblies 313 are distributed on two sides of the camera 312 to provide omnidirectional illumination for the collection effect of the camera 312, so that the images collected by the external imaging device are clearer.

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 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 (15)

1. A curved combination ureteroscope, comprising:

a flexible sheath, the flexible sheath comprising a bending component and a sheath main body and a sheath operating part, the sheath main body extends from one end of the sheath operating part, and the bending component is connected with the sheath main body and is far away from the sheath operating part; and

the inner core comprises an inner core main body and an inner core connecting part, wherein the inner core main body extends from one end of the inner core connecting part and penetrates through the sheath operating part to be positioned in the sheath main body, so that the inner core connecting part is connected with the sheath operating part in a sealing manner.

2. The ureteroscope according to claim 1, wherein the bending member comprises a snake bone part and at least two pulling cables, the snake bone part is mounted on the distal end of the sheath body, and the pulling cables are symmetrically mounted on two sides of the snake bone part and extend from the snake bone part to the sheath operating part.

3. The flexible combination ureteroscope according to claim 2, wherein the sheath manipulating part comprises a sheath body and a bending control member, and a suction channel is formed in the sheath body, the suction channel extends outwardly from the sheath body and communicates with the inner space of the sheath body, the bending control member is mounted on the sheath body and connected to the pulling cable, the bending control member is adapted to control the pulling cable to extend and bend the snake bone, the sheath manipulating part further comprises a first sealing interface end and a sealing interface hole, the first sealing interface end is disposed at the tail of the sheath body, the sealing interface hole is disposed at the first sealing interface end and located on the sheath body axis, the core connecting part further comprises a second sealing interface end, the second sealing interface end is disposed at a position where the core connecting part is connected to the core connecting part, so that the core connecting part is adapted to be located in the sheath body through the sealing interface hole, and the first sealing interface end is in sealing interface with the second sealing interface end to connect the core to the flexible connection to the sheath body.

4. The curved combination ureteroscope of claim 3, wherein the inner core body is rotatably disposed at the sealed interface aperture.

5. The curved combination ureteroscope according to claim 4, wherein the inner core body has an irrigation channel and a first instrument channel, the irrigation channel and the first instrument channel are disposed along the axis of the inner core body and communicate with the inner core connecting portion, and a visual unit is disposed at an end of the inner core body away from the inner core connecting portion, wherein the inner core connecting portion has an irrigation channel and a second instrument channel, the irrigation channel extends outward from one side of the inner core connecting portion and communicates with the irrigation channel, and the second instrument channel communicates with the first instrument channel.

6. The flexible combined ureteroscope according to claim 2, wherein the snake bone part comprises a head snake bone unit, a plurality of sections of middle snake bone units and a connecting section snake bone unit, the connecting section snake bone unit is connected to the sheath body, the middle snake bone units are sequentially connected in an end-to-end pivoting manner, one end of each middle snake bone unit is pivotally mounted on the connecting section snake bone unit, the other end of each middle snake bone unit is pivotally mounted on the head snake bone unit, the pull cable comprises a pull wire and a sleeve, the sleeve extends from the connecting section snake bone unit to the sheath body in a manner of fitting with the sheath body, the pull wire is sleeved in the sleeve, one end of the pull wire is fixed on the head snake bone unit, and the other end of the pull wire is connected to the bending control element.

7. The ureteroscope according to claim 6, wherein the sheath body comprises a sheath body frame and a protective layer, one end of the sheath body frame is connected to the snake bone unit of the connection section, the other end of the sheath body frame is connected to the sheath body, and the protective layer covers the sheath body frame, wherein the sheath body frame is a snake bone frame.

8. The flexible combination ureteroscope according to claim 6, wherein the sheath body comprises a sheath body frame and a protection layer, one end of the sheath body frame is connected to the connection section snake bone unit, the other end of the sheath body frame is connected to the sheath body, and the protection layer covers the sheath body frame, wherein the sheath body frame is a spiral metal ring.

9. A curved combination ureteroscope, comprising:

an introducer sheath having a wedge-shaped tip disposed at a forward end of the introducer sheath;

a sheath including a sheath main body, an operating portion, and a negative pressure suction passage, the sheath main body being connected to the operating portion, a front end of the sheath main body being configured to be bendable; and

a core assembly comprising a core and a connecting portion, the core being connected to the connecting portion, the core being rotatable and withdrawable from the main channel when the core assembly passes through the outer sheath, the connecting portion and the operating portion being connected to each other to fix the outer sheath and the core assembly as a whole, a front end of the outer sheath body being curved to bring about bending of the core assembly, the negative pressure suction channel being provided between the outer sheath and the core assembly.

10. The flexible combination ureteroscope according to claim 9, wherein the sheath body comprises a flexible portion, a fixing portion and a covering film, the flexible portion is integrally connected to the upper end of the fixing portion, the fixing portion is connected to the operation portion, the covering film is sleeved on the surface of the flexible portion, the operation portion comprises a control unit and a traction unit, and two ends of the traction unit are respectively connected to the control unit and the flexible portion, so as to control the flexible portion to be bent by the control unit.

11. The curved combination ureteroscope according to claim 10, wherein the control unit comprises a first control member and a second control member, the first control member and the second control member are disposed on the surface of the operation portion, the traction unit comprises a first traction member and a second traction member, both ends of the first traction member are respectively connected to the first control member and the curved portion, both ends of the second traction member are respectively connected to the second control member and the curved portion, the bending of the curved portion is controlled by the first control member and the second control member, and the first traction member and the second traction member are disposed on the inner wall of the sheath body.

12. The flexible combination ureteroscope according to claim 11, wherein the outer sheath further has an auxiliary channel and a negative pressure adjusting port, the auxiliary channel is disposed inside the operation portion, the auxiliary channel communicates with the main channel, the inner core assembly enters the main channel through the auxiliary channel, the negative pressure adjusting port is disposed on the surface of the operation portion to adjust the air pressure in the negative pressure suction channel, the outer sheath further comprises a sealing cap disposed on the operation portion, and the sealing cap is wrapped between the operation portion and the connection portion to seal the auxiliary channel when the inner core assembly is fixed to the outer sheath.

13. The curved combination ureteroscope according to any one of claims 9 to 12, wherein the core has a water filling channel extending from an end of the core inwardly recessed to extend through the core.

14. The curved combination ureteroscope of claim 13, wherein the core further comprises a camera and a light source, and the camera and light source are positioned at a front end of the core.

15. The curved combination ureteroscope according to claim 14, wherein the core assembly further comprises a water inlet, the water inlet is disposed at the connection portion, the water inlet is communicated with the water filling channel, the connection portion further comprises a working channel and a circuit channel, the working channel is recessed inward from the surface of the connection portion for passing a surgical instrument, and the circuit channel is disposed inside the connection portion for passing the camera and the light source.

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