The Dumping Valve and its Clinical Application
An open reservoir for the collection and evacuation of anaesthetic gases permits leakage to room air. The use of a closed reservoir for the removal of overspill gas from anaesthetic circuits is described. Calibrated gas evacuation is carried out through an ejector flowmeter from the anaesthetic circuit or from a closed reservoir, where the gas is collected via a relief valve. In order to eliminate the risk of high or low pressure in the reservoir employed, a relief valve and a dumping valve is included in the system.
The Ejector Flowmeter and Its Clinical Application
The ejector flowmeter is designed for the quantitative removal of excess anaesthetic gases.
SODA‐LIME CONSUMPTION IN THE HAFNIA RESPIRATORY CIRCUIT
The soda‐lime consumption in three modifications of the Hafnia respiratory circuit was investigated. The absorber consisted of a Waters can‐nister 15 cm in lengdi and 8 cm in diameter. The charge was 675‐685 g of Durasorb Indicating Soda Lime, void space approximately 575 ml. The tidal volume in diis model investigation was 500 ml, the respiratory rate 20, the CO2 addition to the system being 290‐300 ml per minute.