Abstract: The present invention provides thoracentesis catheter instruments having self-sealing valves utilized in invasive medical procedures. The thoracentesis instruments provide automatic sealing of a flow path by the self-sealing valve upon removal of a needle from a catheter. A drainage flow path to a pleural cavity is established by manual movement of another valve. The self-sealing valve prevents insertion of the needle through the valve and the catheter.

Abstract: An endoscopic kitner features a delivery tube with a continuous supply of absorbent material. The absorbent material is retractable into a housing as new absorbent material is placed in position for use. The spent absorbing material is movable into a housing for removal of the kitner. A hand-held drive mechanism is employed to advance the absorbent material.

Abstract: An endoscopic kitner features a delivery tube with a continuous supply of absorbent material. The absorbent material is retractable into a housing as new absorbent material is placed in position for use. The spent absorbing material is movable into a housing for removal of the kitner. A hand-held drive mechanism is employed to advance the absorbent material.

Abstract: An endoscopic tissue retractor capable of being inserted through an endoscopic tube and subsequently capable of forming a T-shaped bar at its distal end. The legs of the "T" may be aligned with the axis of the tissue retractor for insertion within an endoscopic tube and situated transversely to the longitudinal axis for actual use. In use, the legs extend to diametrically opposed sides of the longitudinal axis of the tissue retractor and are rotatable in a plane passing through the axis of the endoscopic tube. A transversely slidable locking mechanism is provided to lock the components of the tissue retractor in a desired position.