| 摘要 |
A method for inserting an instrument (88) into the gastrointestinal tract of a mammal, by emplacing at least a portion of a flexible liner (50) to form within the intestine an inner tube (74) within an outer tube (72), the inner tube (74) defining a lumen (76) lying within the intestine and having a distal end (52) accessible via the anal opening from outside the body of the mammal, and thereafter passing the instrument (88) into the lumen (76) via its distal end (52). Another aspect is the combination of an elongate evertible liner (50), a liner support chamber (14) having a proximal port (22) and a distal port (21), the liner (50) having its two ends attached respectively at the ports, and a pressurizer (31) for increasing the pressure within the chamber to cause the liner (50) to be everted. The liner is formed by a layer of lubricous material (polyvinylpyrrolidone) directly bonded to a layer of elastomeric material (polyurethane) without the use of adhesive. |
