Negative pressure flexible ureteroscope sheath with front end capable of actively bending and stretching

Abstract

The negative pressure flexible ureteroscope sheath with the front end actively bent and telescopic comprises a sheath tube body, an operation channel is formed in the sheath tube body, an operation channel connector is fixed to the rear end of the sheath tube body, and a negative pressure suction connector communicated with the operation channel is fixed to one side of the rear end of the sheath tube body; the sheathing canal body is integrally formed by a telescopic bending section and a straight pipe section, pneumatic telescopic bending adjusting mechanisms are arranged on the upper side, the lower side, the left side and the right side of the telescopic bending section, and a pneumatic telescopic bending control mechanism is arranged at the rear end of the sheathing canal body. The front end of the flexible ureteroscope sheath can be telescopically adjusted and can be bent in multiple directions, the sheath tube can be telescopically adjusted at the rear end and is extremely easy and convenient to operate and adjust, and the sheath tube can increase the trafficability of calculi at the upper section of the ureter and prevent the ureter from being damaged.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a negative pressure ureteral flexible sheath with active front-end bending and telescoping functions. Background Art

[0002] A ureteral flexible endoscope is a surgical instrument for treating kidney stones and upper ureteral stones. It can cooperate with a holmium laser lithotripsy device to break the stones in the kidney and upper ureter, so as to achieve the purpose of treating kidney and upper ureteral stones. Before performing ureteral flexible endoscope surgery, medical staff usually first insert a ureteral flexible sheath along the urethra to establish a ureteral flexible endoscope operation channel.

[0003] The current common ureteral flexible sheath has the following defects: 1. It cannot actively bend to reach the renal calyx where the stone is located, and the broken stone fragments cannot be smoothly discharged out of the body along with the flexible sheath, resulting in a high residual stone rate; 2. If encountering a renal calyx with a small IP angle, forcibly using the passive bending of the front end of the ureteral flexible endoscope to bend the end of the ureteral flexible sheath is likely to damage the ureteral flexible endoscope and unable to continue the operation; 3. If encountering a tall patient or a kidney stone with a long calyx neck, the length of the ureteral flexible sheath is insufficient, and the renal internal pressure is likely to rapidly increase during the lithotripsy process, leading to serious surgical complications such as urosepticemia and renal hemorrhage. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a negative pressure ureteral flexible sheath with active front-end bending and telescoping functions. The front end of the ureteral flexible sheath can be telescopically adjusted and can be bent and adjusted in multiple directions. The telescoping and bending adjustments of the sheath can be operated at the rear end and the operation adjustment is extremely easy and convenient. The sheath can not only improve the stone discharge efficiency, but also prevent damage to the ureteral flexible endoscope; the ureteral flexible sheath can not only allow the operation of the ureteral flexible endoscope but also combine with a pediatric ureteral rigid endoscope to treat complex upper ureteral stones and large-load renal pelvis stones, and at the same time can perform negative pressure suction to timely discharge the broken stones out of the body to improve the stone clearance rate.

[0005] In order to achieve the above technical effects, the utility model is realized through the following technical solutions:

[0006] A negative pressure ureteral flexible sheath with active front-end bending and telescoping functions, comprising a sheath body. An operation channel is opened in the sheath body. An operation channel joint is fixed at the rear end of the sheath body. A negative pressure suction joint communicated with the operation channel is fixed on one side of the rear end of the sheath body; the sheath body is integrally composed of a telescopic and bending section and a straight pipe section. Pneumatic telescopic and bending adjustment mechanisms are arranged on the upper, lower, left and right sides of the telescopic and bending section. A pneumatic telescopic and bending control mechanism is arranged at the rear end of the sheath body. The pneumatic telescopic and bending control mechanism is used to control the telescoping of the pneumatic telescopic and bending adjustment mechanisms in different directions to achieve the purpose of adjusting the telescoping or bending of the front end of the sheath body.

[0007] Furthermore, the pneumatic telescopic bending control mechanism includes a number of disc-shaped air bags, and adjacent disc-shaped air bags are connected through flexible air ducts. The pneumatic telescopic bending control mechanism includes an air charging / discharging duct and an air charging / discharging joint. The air charging / discharging joint is fixed to the rear end of the air charging / discharging duct. The front end of the air charging / discharging duct is connected to the disc-shaped air bags of the pneumatic telescopic bending control mechanism, and the rear end extends from behind the sheath body.

[0008] Furthermore, the telescopic bending section is made of a hollow corrugated pipe, and the disc-shaped air bags at both ends are fixed to the inner wall of the cavity of the hollow corrugated pipe. After the disc-shaped air bags are inflated or deflated, they can extend or shorten along the length direction of the sheath body, so as to realize the extension or shortening of the telescopic bending section.

[0009] Furthermore, the sheath body is made of medical plastic.

[0010] The beneficial effects of the present utility model are as follows: The front end of the flexible ureteroscope sheath can be telescopically adjusted and can be bent and adjusted in multiple directions. The telescopic and bending adjustments of the sheath can be performed at the rear end, and the operation adjustment is extremely easy and convenient. The front end of the sheath can actively bend to reach the renal calyx where the stone is located, and the crushed stone fragments can be smoothly discharged out of the body along with the flexible ureteroscope sheath, just like "a self-driving car with navigation accurately picks you up and takes you to the destination", and it is not easy to damage the flexible ureteroscope, improving the stone clearance rate and the service life of the flexible ureteroscope; The front end of the flexible ureteroscope sheath can also be actively telescopically adjusted. If it encounters a tall person or a kidney stone with a long calyx neck, the sheath of the flexible ureteroscope can actively extend, avoiding the increase of renal pressure during the lithotripsy process, ensuring the negative pressure state in the kidney, greatly reducing the incidence of serious surgical complications such as urosepticemia and renal hemorrhage, and improving the safety of the operation; The front end of the flexible ureteroscope sheath can also be actively telescopically adjusted. If it encounters a kidney stone in a short person, the sheath of the flexible ureteroscope can actively shorten, shortening the stone discharge time and improving the stone discharge efficiency; The front end of the flexible ureteroscope sheath has an active telescopic adjustment function. If it encounters a large-volume complex ureteral stone with severe granulation wrapping and severe impaction in the upper ureter, the sheath of the flexible ureteroscope can actively shorten, and can be combined with a pediatric ureteroscope to cooperate with pneumatic ballistic lithotripsy to quickly, safely and efficiently remove the stone. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a schematic view of the external structure of a negative pressure flexible ureteroscope sheath with active front-end bending and telescoping;

[0013] Figure 2 It is a schematic cross-sectional structure diagram of a negative pressure ureteral flexible sheath with an actively bendable and telescopic front end;

[0014] Figure 3 It is a schematic diagram of the deformation state of a negative pressure ureteral flexible sheath with an actively bendable and telescopic front end. Among them, Figure a is a schematic diagram of the front end bending downward, Figure b is a schematic diagram of the front end bending upward, Figure c is a schematic diagram of the front end bending to the right, Figure d is a schematic diagram of the front end bending to the left, Figure e is a schematic diagram of the front end extending, and Figure f is a schematic diagram of the front end shortening.

[0015] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0016] 1 - sheath tube body, 2 - operation channel joint, 3 - inflation / deflation joint, 4 - disc-shaped airbag, 5 - air duct, 11 - telescopic and bendable section, 12 - straight tube section, 13 - cavity, 14 - surgical operation channel, 15 - negative pressure suction channel, 21 - negative pressure suction joint, 31 - inflation / deflation catheter. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0018] As Figure 1 shown, a negative pressure ureteral flexible sheath with an actively bendable and telescopic front end includes a sheath tube body 1. An operation channel is opened in the sheath tube body 1. An operation channel joint 2 is fixed to the rear end of the sheath tube body 1. A negative pressure suction joint 21 communicated with the operation channel is fixed to one side of the rear end of the sheath tube body 1; the sheath tube body 1 is integrally composed of a telescopic and bendable section 11 and a straight tube section 12. Pneumatic telescopic and bendable adjustment mechanisms are arranged on the upper, lower, left, and right sides of the telescopic and bendable section 11. A pneumatic telescopic and bendable control mechanism is arranged at the rear end of the sheath tube body 1. The pneumatic telescopic and bendable control mechanism is used to control the telescoping of the pneumatic telescopic and bendable adjustment mechanisms in different directions to achieve the purpose of adjusting the telescoping or bending of the front end of the sheath tube body.

[0019] As Figure 2As shown, the pneumatic telescopic bending control mechanism includes a number of disc-shaped air bags 4. Adjacent disc-shaped air bags 4 are connected and communicated through a flexible air duct 5. The pneumatic telescopic bending control mechanism includes an air charging / discharging duct 31 and an air charging / discharging joint 3. The air charging / discharging joint is fixed to the rear end of the air charging / discharging duct. The front end of the air charging / discharging duct 31 is connected to the disc-shaped air bag 4 of the pneumatic telescopic bending control mechanism and the rear end is led out from the rear of the sheath body 1.

[0020] The telescopic bending section 11 is made of a hollow corrugated pipe. The disc-shaped air bags 4 at both ends are fixed to the inner wall of the cavity 13 of the hollow corrugated pipe. After the disc-shaped air bag 4 is inflated or deflated, it can extend or contract along the length direction of the sheath body, so as to realize the extension or contraction of the telescopic bending section 11.

[0021] In this embodiment, the sheath body 1 is made of medical plastic.

[0022] As Figure 3 shown, the specific application of the operation of this device is as follows: Inflate the 4 air charging / discharging joints at the rear end of the sheath body 1 simultaneously. The disc-shaped air bags 4 will be inflated and extended simultaneously. At this time, the front end of the sheath body 1 will show an overall extension (Figure e). Simultaneously deflate the 4 air charging / discharging joints at the rear end of the sheath body 1. At this time, the front end of the sheath body 1 will show an overall contraction (Figure f). When inflating the air charging / discharging joint above the rear end of the sheath body 1, at this time, the disc-shaped air bag 4 above the telescopic bending section 11 is inflated and extended. At this time, the front end of the sheath body will bend downward (as shown in Figure a). When inflating the air charging / discharging joint below the rear end of the sheath body 1, at this time, the disc-shaped air bag 4 below the telescopic bending section 11 is inflated and extended. At this time, the front end of the sheath body will bend upward (as shown in Figure b). When inflating the air charging / discharging joint on the left side of the rear end of the sheath body 1, at this time, the disc-shaped air bag 4 on the left side of the telescopic bending section 11 is inflated and extended. At this time, the front end of the sheath body will bend to the right (as shown in Figure c). When inflating the air charging / discharging joint on the right side of the rear end of the sheath body 1, at this time, the disc-shaped air bag 4 on the right side of the telescopic bending section 11 is inflated and extended. At this time, the front end of the sheath body will bend to the left (as shown in Figure d). The telescopic and bending forms of the sheath body do not affect its own flexibility change. The telescopic and bending of the front end of the sheath body can increase its own accessibility and prevent damage to the upper ureteral calculi when the sheath is inserted. Connect the negative pressure suction joint of the sheath body 1 to the negative pressure device, and the crushed stones shattered by the holmium laser extended at the front end of the operation channel joint 21 can be sucked to the outside under negative pressure.

[0023] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

Claims

1. A negative pressure ureteroscope sheath with active bending and retracting at the front end, comprising a sheath body, an operation channel is opened in the sheath body, an operation channel joint is fixed to the rear end of the sheath body, and a negative pressure suction joint connected to the operation channel is fixed to one side of the rear end of the sheath body, characterized in that; The sheath body is composed of an integrated telescopic bending section and a straight tube section. Pneumatic telescopic bending adjustment mechanisms are arranged on the upper, lower, left and right sides of the telescopic bending section. A pneumatic telescopic bending control mechanism is arranged at the rear end of the sheath body. The pneumatic telescopic bending control mechanism is used to control the telescopic movement of the pneumatic telescopic bending adjustment mechanism in different directions to achieve the purpose of adjusting the telescopic movement or bending of the front end of the sheath body.

2. The negative pressure ureteroscope sheath with active bending and telescopic front end according to claim 1, characterized in that: The pneumatic telescopic bending control mechanism includes a plurality of pancake-shaped air bags, and two adjacent pancake-shaped air bags are connected by a flexible air guide tube. The pneumatic telescopic bending control mechanism includes an inflation and deflation air catheter and an inflation and deflation air joint, and the inflation and deflation air joint is fixed to the rear end of the inflation and deflation air catheter. The front end of the inflation and deflation air catheter is connected to the pancake-shaped air bags of the pneumatic telescopic bending control mechanism, and the rear end is led out from the rear of the sheath body.

3. The negative pressure ureteroscope sheath with active bending and telescopic front end according to claim 2, characterized in that: The telescopic bending section is made of a hollow corrugated tube, and the pancake-shaped airbags at both ends are fixed on the inner wall of the cavity of the hollow corrugated tube. After being inflated or deflated, the pancake-shaped airbags can be extended or shortened along the length direction of the sheath body, thereby achieving the extension or shortening of the telescopic bending section.

4. The negative pressure ureteroscope sheath with active bending and extension at the front end according to any one of claims 1 to 3, characterized in that: The sheath tube body is made of medical plastic.

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