Patent ID: 7985239
Filing Date: 2011-07-26
Classification: A61B,A61M

Abstract:
1. A medical instrument comprising: a tubular sheath; a tip cover positioned on a distal end of the tubular sheath, the tip cover having a swingable operating section on a distal end portion of the tip cover, the swingable operating section formed of a pair of forceps, each of which rocks individually around a respective first rocking axis corresponding thereto; the tip cover further having a proximal end portion having a circular cross section perpendicular to a longitudinal central axis of the circular cross section and a pair of parallel flat portions symmetrically formed on an external surface of the distal end portion, the pair of parallel flat portions being in sliding contact with respective proximal end portions of the forceps; a nozzle extending from the tip cover and configured for receiving tissue cut by the pair of forceps; a pair of manipulators which advance and retreat along the longitudinal central axis of the tubular sheath, thereby rocking the forceps around the first rocking axis; and a pair of junctions which respectively connect the manipulators for rocking motion around a second rocking axis to the forceps in the flat portions, the junctions being situated substantially on a reference plane containing the longitudinal axis of the tubular sheath and extending parallel to the second rocking axis, when the operating section is closed; wherein the first rocking axis of each forceps is not on the reference plane when the operating section is closed.