Reservoir bag for anesthesiology

Claim 1

A low cost disposable two-piece reservoir bag, comprising: an integral single-piece thin walled, substantially uniform thickness, a leak-proof bag of a flexible elastomeric rubber material, the bag elasticity and thinness cooperating in rendering the bag expandable under over-pressure conditions thereby avoiding exposure to the patient of excessive pressures, the bag being of low gas permeability and having a neck with an opening formed therein in communication with the interior of the bag, the bag having good tactile sensitivity and being conductive throughout all surfaces thereof; conductive adapter means fixedly positioned within the neck and including a portion extending from said bag, the adapter having an annular radial projection extending therefrom intermediate the ends thereof, and the rubber neck being elastically stretched into engagement with the adapter over the projection to thereby provide a tight sealed interengagement between adapter and bag and to provide a continuous conductive path from end to end of the two-piece bag; and projections formed on the adapter and extending into the interior of the bag for preventing obstruction of the opening when the bag is displaced to one side.