Patent ID: 7238153
Filing Date: 2007-07-03
Classification: A61B

Abstract:
1. An endoscope hood comprising: a cylindrical attachment portion configured to be attached to a distal end portion of an insertion portion of a first endoscope and to be attached to a distal end portion of an insertion portion of a second endoscope having an outside diameter fitting for the attachment, the outside diameter being different from an outside diameter of the distal end portion of the insertion portion of the first endoscope; a protrusion portion formed on an end side of the cylindrical attachment portion, the protrusion portion configured to protrude in an observation visual field direction from the distal end portion of the insertion portion of at least the second endoscope, and having an area displayed in an observation image of the second endoscope that is larger than an area displayed in an observation image of the first endoscope, wherein the protrusion portion is formed into a shape such that the protrusion portion is not visible in an observation image of the first endoscope when the attachment portion is attached to the distal end portion of the first endoscope insertion portion, and such that the protrusion portion appears in an observation image of the second endoscope when the attachment portion is attached to the distal end portion of the second endoscope insertion portion; and a positioning member configured to enable attachment at positions appropriate to the first and second endoscopes provided on an inner peripheral surface of the attachment portion.