Abstract: Trocar for inserting endoscopy instruments into cavities, the trocar having a cleanable hollow body, a disposable tip which is equipped with a swivel valve that can be retracted by inserting the instrument through an internal channel in the tip that communicates with the hollow body. The disposable tip is also equipped with externally operable features capable of modifying the diameter of channel in order to match it to the diameter of the instrument to be inserted.

Abstract: The invention is relative to a cardiac valve.This valve is of the type which comprises a means inserted with a controlled and limited clearance into a casing (2) comprising a ring (2.1) and a wire framework constituting arches, which ring comprises a peripheral groove (2.2) on its outer periphery which groove permits the centering and positioning of a covering (3), which valve is characterized in that said means which is inserted into the casing is a module comprising a hemisphere (1.1) extended in the front by a finger (1.3) which extends from the ring toward the outside, which ring comprises an inner profile (2.4) which forms a seat which permits the centering and angular tipping and the articulation of the module (1) in every position of the sweep of the finger.