A detachable and retractable flexible ureteroscope sheath

Abstract

The invention belongs to the field of medical instruments, in particular relates to a detachable and telescopic flexible ureteroscope sheath. The detachable and telescopic flexible ureteroscope sheath comprises a tail part, a sheathing canal part and an inner core, wherein the tail part comprises a fastening buckle connecting part and a negative pressure suction part which are movably connected; the sheathing canal part is of a two-section structure and comprises a front section sheathing canal and a rear section sheathing canal which are connected in a sleeving way; the tail part and the sheathing canal part are connected together through the locking of the fastening buckle connecting part and the rear section sheathing canal; the inner core can be inserted in the fastening buckle connecting part and the sheathing canal part. According to the detachable and telescopic flexible ureteroscope sheath disclosed by the invention, the imbedding of the detachable and telescopic flexible ureteroscope sheath under the direct endoscope observation is realized, the operation difficulty is reduced, the operation safety is ensured, the success rate of one-stage operation is increased, and an immediate stone cleaning effect is increased; the demands of operation personnel on different lengths of sheathing canals in an operation can be met to the maximum, and convenience is provided for surgical operation.

Description

technical field [0001] The invention belongs to the field of medical instruments, in particular to a detachable and expandable flexible ureteroscope sheath. Background technique [0002] At present, flexible ureteroscope sheath (also known as flexible ureteroscope delivery sheath) is widely used in flexible ureteroscope holmium laser lithotripsy to treat upper ureteral stones and kidney stones, and is one of the most important auxiliary devices in flexible ureteroscope holmium laser lithotripsy one. Although there are many manufacturers of flexible ureteroscope sheaths, due to their design defects and single structure, they cannot meet the changing clinical needs. Its main performance is: [0003] 1) It is undoubtedly safer and has a higher success rate to complete the insertion of the flexible ureteroscope sheath under direct vision of the endoscope. At present, the working length of all such products is not variable (male type 450mm, female type 350mm), and the working ...

AI Technical Summary

Problems solved by technology

At present, the working length of all such products is not variable (male type 450mm, female type 350mm), and the working length of ureteroscope is 430mm. The guide wire is inserted blindly or under X-ray fluoroscopy based on the operator's hand feeling and experience, which may cause accidental damage; and the primary surgery lithotripsy treatment will also be given up due to the difficulty of insertion

[0004] 2) Both the tail and the sheath of existing products are fixedly connected with non-detachable parts, and the working length of the sheath is not variable. When the sheath of the flexible ureteroscope cannot be completely inserted into the renal pelvis, the exposed part outside the body will be too long, and the length of the flexible scope will be too long. Relatively too short, although the flexible lens end of the ureter can enter the lumen of the ureter on the affected side, but cannot enter the renal pelvis and calices, and cannot complete the lithotripsy treatment for kidney stones

If the above situation occurs in a male patient, the operator may use a relatively short female ureteroscope sheath to complete the operation, thereby increasing the operation cost

Alternatively, the operator cuts off the tail end of the flexible ureteroscope sheath and part of the sheath that are exposed outside the body, and then completes holmium laser lithotripsy under the flexible ureteroscope, but after destructively cutting off the tail end of the flexible ureteroscope sheath, there The exposed slender steel wire and the diameter of the tube are too small, which brings a lot of inconvenience to the operation during the operation

[0005] 3) Existing products do not have the function of removing stones after crushing stones, and often need to set the stone basket repeatedly to remove stones, which is low in efficiency and high in cost

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