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Predictable Paco 2 , with two different flow settings using the Mapleson D system
Author(s) -
JONSSON L. O.
Publication year - 1990
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.1399-6576.1990.tb03077.x
Subject(s) - medicine , anesthesia , coaxial , fresh gas flow , ventilation (architecture) , flow (mathematics) , mechanics , meteorology , sevoflurane , physics , engineering , electrical engineering
Two different settings of fresh gas flow ( FG ) and minute ventilation ( E ) used with the coaxial Mapleson D system (Bain), were evaluated in 59 adults (ASA I‐III) during controlled ventilation and different types of surgical procedures. The two flow settings (alternatives A and B) were of FG 75 and 110 ml · min ‐1 . kg ‐1 and E , of 150 and 175 ml · min ‐1 kg ‐1 , aiming to generate normocapnea and mild hypocapnea, respectively. The Paco 2 obtained with alternative A was 5.5 ± 0.5 kPa (mean ± s.d.), with 92% of the patients within the range 4.7–6.1 kPa. With alternative B, the Paco 2 was 4.4 ± 0.5 kPa, with 82% of the patients within the range 3.5–4.9 kPa. It is concluded that these two flow regimes are suitable for clinical use when either normocapnea or mild hypocapnea is desired.