ABSTRACT
In 28 children undergoing cardiopulmonary bypass with deep hypothermia for open heart surgery, an attempt was made to maintain pH at 7.4 not corrected for temperature by varying the CO2 concentration supplied to the oxygenator so that the PaCO2 was 5.33 kPa, not corrected for temperature. One to two percent CO2 gave satisfactory results. Five percent CO2 had previously been given. No adverse clinical side effects were noted, and the acid-base status remained stable for 24 hours in 16 patients. There are strong theoretical reasons for maintaining a pH of 7.4, uncorrected for temperature, during hypothermia and a clinical impression was gained of better myocardial function and improved systemic and cerebral perfusion.
Subject(s)
Acid-Base Equilibrium , Carbon Dioxide/blood , Cardiopulmonary Bypass , Hypothermia, Induced , Carbon Dioxide/administration & dosage , Cardiac Surgical Procedures , Child , Humans , Hydrogen-Ion Concentration , Temperature , Time FactorsABSTRACT
Oxygen and nitrous oxide pipes were cross-connected during the servicing of an anaesthetic machine. This resulted in the delivery of 100% nitrous oxide instead of 100% oxygen at the end of the operation. The patient fully recovered and was discharged on the 13th day.
