| 摘要 |
Endoscopic insertion device into a duct, characterized in that it comprises an essentially tubular, endless body (11) defined by a sheath having negligible resistance to deformation and being in substantially distended condition, said body having, in any position thereof, a substantially elongated portion (12a, 12b, 12a', 12b'), bounded by semi-toroidal end portions (13a, 13b, 13a', 13b'). |
