Ureter sheath

Abstract

The invention relates to a ureter sheath for flexible ureteroscope surgery. The ureter sheath comprises a flexible ureterscope outer sheath and a sheath inner core. According to the ureter sheath, a conical tubular guiding head with the small front part and the large part is arranged at the front end of the flexible ureterscope outer sheath, and meanwhile an opening is formed in the side face; thesheath inner core with the tubular body and the conical tubular front end is in clearance fit with the inner aperture of the outer sheath body, the front end of the sheath inner core is conical tubular and is matched with an inner hole of the guiding head and a connecting part, an insertion positioning structure is arranged between the front end of the sheath inner core and the rear end of the guiding head, during flexible ureteroscope surgery, when the upper section of a ureter is narrow and cannot pass through the flexible ureterscope outer sheath, the flexible ureterscope outer sheath cannot continue to enter when entering along a guide wire indwelling inside the ureter to the narrow part of the ureter, the sheath inner core exits, and the front end of the flexible ureterscope outer sheath crosses the narrow position of the flexible ureterscope outer sheath, so that the opening in the front end of the flexible ureterscope outer sheath is located below the narrow part so that the naked ureterscope can pass through the narrow section to reach the surgery field, during surgical operation, pouring liquid continues to enter the surgery field through the ureterscope, the surgery field ureterscope is drained into the sheath through an outward extending catheter, and the surgery field is kept clear.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a ureteral sheath for flexible ureteroscopic surgery. Background technique [0002] Clinically, a ureteric sheath must be inserted into the ureter before flexible ureteroscopic surgery, and the flexible ureteroscope enters the ureteral sheath to reach the upper segment of the ureter or the renal pelvis for surgical operations. During the operation, the fluid in the operative field is continuously perfused through the flexible ureteroscope, and the fluid in the operative field is continuously discharged out of the body through the ureteric sheath to keep the operative field clear. If the upper part of the ureter is narrow and cannot pass through the sheath, only the following two options can be used: 1. Naked mirror passes through the ureter to reach the operation field for operation. Surgical operations, and even some patients have renal pelvic pressure due to the in...

AI Technical Summary

Problems solved by technology

If the upper part of the ureter is narrow and cannot pass through the sheath, only the following two options can be used: 1. Naked mirror passes through the ureter to reach the operation field for operation. Surgical operations, and even some patients have renal pelvic pressure due to the inability to discharge the fluid in the surgical field, which can cause serious complications such as severe urinary infection and perirenal hematoma

Images