The production of a reliable supply of parenteral fluids, in otherwise adequately equipped hospitals, has been hindered by the lack of simple apparatus in which chemically pure solutions can be dispensed safely and economically. The apparatus1 illustrated (fig. 1) was designed to provide easy sterilization, safe storage under hermetic seal, and ready administration from the original container.
The new apparatus consists of a stainless steel stopper,2 which fits a rubber bushing3 inserted into the mouth of a thick-walled, short necked 1,500 cc. pyrex flask.1 The flask is emptied by substituting for the stem of the steel stopper a pyrex tube, which is provided at one end with a capillary orifice which acts as an air valve and at the other end with the usual rubber tubing connector.
When the stem of the stopper is partially inserted into the rubber bushing, the channel cut into its lower third
Walter CW. SIMPLIFIED APPARATUS FOR THE ADMINISTRATION OF PARENTERAL FLUID. JAMA. 1936;106(23):1982–1983. doi:10.1001/jama.1936.92770230001009
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