Abstract: A biopsy valve includes a body having a first groove adapted to fit over a lip of an endoscope working channel and a second groove and a first membrane. A primary cap is mechanically coupled to the body by a primary strap extending between the primary cap and the body. The primary cap includes a primary cap lip to couple into the second groove of the body, a second membrane and a primary cap groove. A guard cap is mechanically coupled to the body by a guard cap strap extending between the guard cap and the body. The guard cap includes a guard cap lip which couples into the primary cap groove of the primary cap, and a third membrane. A triple membrane biopsy valve and a method of using a biopsy valve with an endoscope working channel are also described.

Abstract: The present disclosure provides for a syringe that is designed to enable a plunger to be locked or secured in position thereby freeing a user's hand from the plunger for other tasks. The syringe may be coupled to a needle or hypodermic needle or other apparatus such as an intravenous line/port or catheter. The syringe takes advantage of a tapered barrel and a positive stop to prevent movement of the piston along the inner surface of the barrel when no force is being actively applied to the plunger. This prevents unwanted suction or spillage of the contents contained therein.