PMID: 39415Jun 1, 1979

Arterial carbon dioxide tensions during anaesthesia with manual ventilation. A descriptive study of the effects of various non-polluting circuits

Acta Anaesthesiologica Scandinavica
P HoleS Jørgensen

Abstract

In 660 supine, intubated and anaesthetized, healthy patients scheduled for various elective surgical procedures, the distribution of arterial carbon dioxide tension (PaCO2) was investigated during manual non-monitored ventilation. The study comprised six equal groups: group 1: ventilation with a circle circuit absorber system; group 2: ventilation with the Hafnia A circuit using a total fresh gas flow (FGF) of 100 ml . kg-1 . min-1; groups 3-6: ventilation with a Hafnia D circuit with fresh gas flows of 100, 80, 70 and 60 ml . kg-1 . min-1, respectively. The mean PaCO2's of the first three groups were situated in the lower range of normocapnia (the observations in the first group having the greatest total range), whereas the rebreathing (Hafnia A and D) circuits resulted in a clustering of observed data. Employing the rebreathing circuits, protection against hypocapnia can be achieved by lowering the fresh gas flow. The most satisfying result was obtained with the Hafnia D circuit with a fresh gas flow of 70 ml . kg-1 . min-1 resulting in normocapnia with a modest and limited spread towards hypo- and hypercapnia. FGF in excess of this level must be considered as wasted. The study indicates that corrections of fresh gas flows fo...Continue Reading

References

Jan 1, 1976·Journal of Applied Physiology·A H Harken
Nov 1, 1977·Anesthesia and Analgesia·R EdwardsS Ramamurthy
Aug 1, 1979·British Journal of Anaesthesia·P K Andersen, P Hole
Jan 1, 1978·Acta Anaesthesiologica Scandinavica·K N ChristensenS Jørgensen
Jan 1, 1978·Acta Anaesthesiologica Scandinavica·H J Ladegaard-Pedersen
Jan 1, 1975·Canadian Anaesthetists' Society Journal·J A Bain, W E Spoerel
Nov 1, 1975·Circulation·W A Neill, M Hattenhauer
Aug 24, 1966·Biochimica Et Biophysica Acta·M Ui
Nov 1, 1967·The American Journal of Physiology·J Scheuer, M N Berry
Jan 1, 1974·Acta Anaesthesiologica Scandinavica·S JORGENSEN
Jul 1, 1968·Journal of Applied Physiology·C Prys-RobertsJ Bay
Jul 1, 1971·British Heart Journal·J Pilcher, R E Nagle
Nov 1, 1967·British Journal of Anaesthesia·L F WaltsJ B Dillon
Nov 25, 1954·The New England Journal of Medicine·E P RADFORDB C KRIETE
Nov 1, 1960·Anesthesiology·H L PRICE

Citations

Dec 1, 1980·Acta Anaesthesiologica Scandinavica·A Hjorth
Aug 1, 1980·Acta Anaesthesiologica Scandinavica·A HoleH Breivik
Jan 1, 1985·Acta Anaesthesiologica Scandinavica·D ObelK Frandsen
Aug 1, 1989·Acta Anaesthesiologica Scandinavica·J KristensenP Hole
Apr 1, 1985·Acta Anaesthesiologica Scandinavica·K J ChristensenS Jørgensen

Related Concepts

General Anesthesia
Anesthesia, Intravenous
Carbon Dioxide
Hydrogen-Ion Concentration
Oxygen Consumption
Mechanical Ventilation

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