Patent ID: 7087012
Filing Date: 2006-08-08
Classification: A61B

Abstract:
1. An endoscope hood which is integrally or detachably provided at the distal end of an insertion portion of an endoscope to be inserted into a lumen and which comprises a hood body for preventing direct contact of a front-end lens surface of an observational optical system exposed at an end surface of this distal end with a medial wall surface of the lumen and a protrusion protruding in the direction of an observational field of view of the endoscope while the protrusion is disposed at an end portion of the hood body, wherein at least one concave portion is provided as a part of the protrusion while protruding frontward from the location of the front-end lens surface with a protrusion length shorter than those of parts other than the concave portion and an inclined surface divergent frontward from the location of the front-end lens surface is provided on an inside surface of at least one of the concave portions, and wherein the angle between the inside inclined surface of the concave portion and the front-end lens surface is larger than the angle between inside -surfaces of the other parts adjacent to the concave portion and the front-end lens surface.