Trocar valve seals

Abstract

A valve seal for a trocar cannula having a distal end and an opposing proximal end with an enlarged section for accommodating at least a part of a valve seal. The valve seal has a tubular neck part defined by a first circumferential wall, an instrument leaving end and an opposing instrument receiving end, the instrument receiving end is provided with a first diaphragm valve and a circumferential flange connecting the tubular neck part with a substantially concentric second circumferential wall surrounding at least a part of the first circumferential wall to define a gap between said substantially concentric circumferential walls, at a distance from the first diaphragm valve the first circumferential wall of the tubular neck part is axially split up into an exterior tubular neck part and a substantially concentric interior tubular neck part provided with a second diaphragm valve, the interior tubular neck part terminating a distance from the instrument leaving end. The valve seal is moulded in its final form. The valve seal has at least three valves, which enhance sealing capability, and the design of the valve seal is suitable for trocars with cannulas of various diameters.

Dependencies are inferred from the claim text.