METHOD FOR RETRIEVING OBJECTS FROM A LIVING BODY AND EXPANDING A NARROWED REGION IN THE LIVING BODY

摘要

A method of expanding a narrowed region inside a living body involves positioning a liquid introducer in the narrowed region in the living body and introducing liquid into the narrowed region by way of the liquid introducer. The liquid applies an outwardly directed force on the narrowed region to expand the narrowed region. The narrowed region includes the renal pelvis, the entrance to the lower calix, the ureter, etc.

主权项

1. A method comprising:
introducing a housing into a living body, the housing possessing an interior with a rotatable impeller positioned in the interior of the housing, the impeller including an inlet and an outlet; moving the housing in a lumen in the living body; positioning the housing at a narrowed region of the lumen in the living body; and rotating the impeller in the interior of the housing while the housing is located in the narrowed region of the lumen in the living body to draw fluid into the inlet and to expel the fluid out of the outlet so that the fluid which is expelled out of the outlet expands the narrowed region of the lumen in the living body to increase an interior size of the narrowed region to an expanded interior size.