The physical and bacteriological properties of disposable and non-disposable suction drainage units in the laboratory

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Abstract
The physical and bacteriological properties of disposable and non-disposable suction units have been studied in the laboratory. The disposable units which operate at a lower suction pressure were found to be subject to spontaneous loss of vacuum, while positional change of the containers of the magnitude encountered in clinical practice could easily produce reversal of flow from the container. The incidence of contamination in the systems in a laboratory model designed to simulate the ward situation was higher in the disposable units.

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