Denitrogenation in pregnant women.
Forty-five pregnant females were studied with respect to the effectiveness of denitrogenation by the 3, 5, 7 and 9 rapid vital capacity breaths, and 3 to 5 minutes of normal breathing. It was found that 3 to 9 vital capacity breaths cannot effectively denitrogenate a pregnant patient when a circle breathing system with a gas flow of 8 litres/min is used. At least 3 minutes of normal tidal volume breathing should be given for proper denitrogenation or preoxygenation if the circle system is used for such a purpose.
Chong
J L
JL
Department of Anaesthesia, Kandang Kerbau Hospital, Singapore.
Chin
E Y
EY
Chan
S Y
SY
Lee
H L
HL
Thomas
E
E
D000030:Abortion, Missed / Q000601:surgery; D000328:Adult; D000768:Anesthesia, General; D000773:Anesthesia, Obstetrical / Q000379:methods; D002585:Cesarean Section; D005260:Female; D006801:Humans; D009584:Nitrogen / Q000502:physiology*; D010100:Oxygen / Q000008:administration & dosage; D049590:Postpartum Period; D011247:Pregnancy; D012119:Respiration / Q000502:physiology*; D013246:Sterilization, Tubal; D014797:Vital Capacity
D009584:Nitrogen; D010100:Oxygen