Aiming at establishing a conduit during endoscopic procedures facilitating the passage of endoscopes and other instruments into the urinary tract.
A ureteral access sheath adapted for insertion into a urethra includes an elongate tube.
It is used to expand and establish channels for instrumentation when patients with renal calculi or hydronephrosis are treated with percutaneous nephrostomy dilation and endoscopic surgery.
In clinic, the expansion tube with sheath tube is implanted into the human body under the guidance of guide wire, and the expansion tube is removed, and the sheath tube is placed in the body for surgical instruments or drainage catheter placement.
Because it can remain in the human body for a period of time, reducing the pain of patients and the workload of nursing staff, it is a common minimally invasive surgical instrument in clinic.