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The 600 Gram CO 2 Absorption Canister: An Experimental Study
Author(s) -
Jørgensen B.,
Jørgensen S.
Publication year - 1977
Publication title -
acta anaesthesiologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 107
eISSN - 1399-6576
pISSN - 0001-5172
DOI - 10.1111/j.1399-6576.1977.tb01244.x
Subject(s) - soda lime , lime , medicine , carbon dioxide , gram , volumetric flow rate , absorption (acoustics) , anesthesia , analytical chemistry (journal) , pulp and paper industry , chromatography , composite material , materials science , metallurgy , chemistry , geology , mechanics , physics , organic chemistry , paleontology , bacteria , engineering
Model investigations were performed on a canister containing 600 g of Sodasorb indicator soda lime in a transparent lime compartment used in the Hafnia circle. The CO 2 input was 300 ml per min. Carbon dioxide will be efficiently eliminated from the gas mixture conveyed to the patient connection in this system for at least 4 h, irrespective of the rate of fresh gas flow. There was proportionality between the fresh gas inflow and the duration of effective CO 2 elimination. The relative efficacy of the CO 2 absorption was investigated at different levels in the canister. The temperature in the axis of the lime compartment was 43–52° C, and the temperature of the gas mixture conveyed to the patient attachment 30–35° C. The colour shift in the lime charge was a reliable indicator of the efficiency of CO 2 elimination. The canister should be replaced when the colour shift has progressed to 2/3 of the lime charge. The canister contains no disposable parts except for the lime charge. All the components of the circle system should be taken apart and cleaned after each anaesthesia.