Abstract: A valve and a valved trocar jacket tube by which there is no need of an adapter, types of a clamp or the like to be used are not limited, and leakage of an inert gas from an abdominal cavity can be prevented. In the valve and the valved trocar jacket tube, when a pair of rings are relatively rotated at a predetermined angle in the opposite directions, a cylindrical section in a rubber-like member is opened. In case of employing a clamp or the like, it is inserted into the abdominal cavity through the opened cylindrical section. Since the rubber-like member has elasticity, the cylindrical section is close together with the clamp or the like inserted.

Abstract: A valve and and a valved trocar jacket tube by which there is no need of an adapter, types of a clamp or the like to be used are not limited, and leakage of an inert gas from an abdominal cavity can be prevented. In the valve and the valved trocar jacket tube, when a pair of rings are relatively rotated at a predetermined angle in the opposite directions, a cylindrical section in a rubber-like member is opened. In case of employing a clamp or the like, it is inserted into the abdominal cavity through the opened cylindrical section. Since the rubber-like member has elasticity, the cylindrical section is close together with the clamp or the like inserted.

Abstract: Disclosed is a valved trocar jacket tube, in which both ends of a first cylindrical elastic member are secured, one end of a second cylindrical elastic member is attached to one of first and second rings, which are so constructed that when they are rotated relatively in the opposite directions the opening of the first cylindrical elastic member is closed from the opening state, and a fluid container is provided at a predetermined position of the second cylindrical elastic member, which is inflated to have a ring shape by the increase of an inner pressure generated by injection of a fluid. According to this structure, it is possible to provide a valved trocar jacket tube, which can prevent leakage of an inert gas from an abdominal cavity without reducing the operativity during surgery.