OPTICAL TROCAR ASSEMBLY AND SYSTEM

摘要

An optical trocar assembly has an elongated tubular member for receiving an endoscope which defines a longitudinal axis and has an open proximal end and a closed, optically clear distal end which is adapted for penetrating body tissue. The optical trocar assembly has a handle releasably connected to the elongated tubular member and which defines a passage which is coaxial with the longitudinal axis and which has a distal portion and proximal portion. The distal portion receives the open proximal end and the proximal portion defines a tapering opening. A locking collet is positioned within the tapering opening having a through bore which is coaxial with the longitudinal axis and the tapering external surface. One of the tapering opening and the tapering external surface has a helical rib and the other of the tapering opening and the tapering external surface defines a helical recess engaging the helical rib

主权项

1. An optical trocar assembly comprising:
an elongated tubular member for receiving an endoscope, defining a longitudinal axis and having an open proximal end and a closed, optically clear distal end, wherein the distal end is adapted for penetrating body tissue; a handle releasably connected to the elongated tubular member and defining a passage which is coaxial with the longitudinal axis and which has a distal portion and proximal portion, wherein the distal portion is for receiving the open proximal end and proximal portion defines a tapering opening which is tapered in the direction towards the distal portion; and a locking collet positioned within the tapering opening, having a through bore which is coaxial with the longitudinal axis and a tapering external surface; wherein one of the tapering opening and the tapering external surface comprises a helical rib and the other of the tapering opening and the tapering external surface defines a helical recess for engaging the helical rib.