A combined structure of a sheath-feeding dilation tube and a ureteral sheath

Abstract

The invention discloses a combined structure of a sheath feeding dilation tube and a ureter sheath, comprising a tube sheath and a dilation tube coaxially inserted into the tube sheath, one end of the dilation tube is coaxially fixed in the dilation tube handle, and the dilation tube A guide wire channel is opened in the tube along its axial direction, the dilation tube and the tube sheath are provided with a guiding structure that can cooperate with each other to coaxially introduce the dilation tube into the tube sheath, and the guiding structure includes a guide structure arranged on the dilation tube The outer guide boss is matched with the guide boss, is arranged in the axial direction parallel to the tube sheath, and can be used as the guide tube sheath section of the negative pressure stone discharge channel. The ureteral sheath is designed as a special-shaped sheath structure consisting of a large arc tube sheath segment and a small arc tube sheath segment. The dilation tube can be guided by the small arc tube sheath segment and the guide boss. Cooperate with the endoscope to penetrate the image channel, inject water to keep the field of vision clear, after the sheath is applied, the ureteral sheath can be used as a surgical instrument, and the ureteroscope catheter can be used for lithotripsy and stone removal.

Description

technical field [0001] The invention relates to the technical field of urological surgical equipment, in particular to a combined structure of a sheath-feeding dilation tube and a ureteral sheath. Background technique [0002] In the flexible ureteroscope surgery, the flexible ureteroscope can enter the body through the urethra to observe the lesions and can cooperate with the surgical instruments to perform visual surgical treatment in the body. Clinical in vivo examination and visual surgical treatment require endoscopes with clear images to help doctors improve the accuracy of diagnosis. In the existing flexible ureteroscope operation, the sheath expansion tube cooperates with the ureter sheath to perform the sheathing operation, and then the ureteroscope catheter is inserted into the ureter sheath to treat the affected area. The crushed and excreted stones need to be excreted through the ureteral sheath. At this time, the ureteroscopic catheter needs to be withdrawn to ...

AI Technical Summary

Problems solved by technology

In the existing flexible ureteroscopic surgery, the sheathing dilation tube cooperates with the ureteral sheath for sheathing operation, and then the ureteroscopic catheter is inserted into the ureteral sheath to treat the affected area. The crushed stones need to be excreted through the ureteral sheath. At this time, the ureteroscope catheter needs to be withdrawn to operate. However, due to the withdrawal of the ureteroscope catheter, the discharge of the broken stones cannot be observed, and the broken stones cannot be completely discharged from the body at one time. In order to ensure the effect of the operation, it is necessary to insert the ureteroscopic catheter multiple times for observation or treatment. This repeated operation of inserting the ureteroscopic catheter increases the pain of the patient, and it is also easy to cause damage to human organs

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