[The CO2 absorption capacity and color indication of a newly developed soda lime (Wakolime)].
The CO2 absorption capacity and the color change of ethyl violet (color indicator) of Wakolime A (newer type). Wakolime (older type), and Sorb 800 were studied under the clinical anesthetic condition. A two chamber canister was filled with soda lime and anesthetic gas flowed upward through the canister at the rate of 4 ml.min-1. The wall temperature of each chamber was measured with surface temperature sensing device. After 30 hours of use, the colored soda lime in the first chamber was examined with a color analyzer. The change of wall temperature indicated that the CO2 absorption capacity of Sorb 800 was the largest and that of Wakolime was the smallest among the three. The indicator color of both Wakolime A and Sorb 800 was clearer and of more vivid violet than that of Wakolime, which was dull and grayish. These results indicated that Wakolime A is superior in the CO2 absorption capacity and color indication to Wakolime.
Department of Anesthesiology, Kochi Medical School, Nankoku.
M
M
Tsuchiya
W
W
Ueda
M
M
Tomoda
H
H
Aono
T
T
Hasegawa
J
J
Aono
M
M
Yokoyama
D000042:Absorption; D000776:Anesthesiology / Q000295:instrumentation*; D017610:Calcium Compounds; D002245:Carbon Dioxide; D003116:Color; D006801:Humans; D010087:Oxides; D012972:Sodium Hydroxide
D017610:Calcium Compounds; D010087:Oxides; D002245:Carbon Dioxide; C004569:soda lime; D012972:Sodium Hydroxide