End-tidal oxygraphy and safe duration of apnoea in young adults and elderly patients.
Using an end-tidal fractional oxygen concentration of 0.9 as an end point for pre-oxygenation, we have compared the time taken to achieve this end point and the safe duration of apnoea after induction of anaesthesia following pre-oxygenation in elderly patients and young adults. The times taken to reach the end point of pre-oxygenation and for the oxygen saturation to decrease to 92% during a period of apnoea were found not to be significantly different between the two age groups. It is concluded that in spite of the physiological changes that occur with age, end-tidal oxygen concentration monitoring is as useful in the elderly population as in young adults as an end point for pre-oxygenation.
Bhatia
P K
PK
Department of Anaesthesiology, M.G. Hospital, Dr S.N. Medical College, Jodhpur (Raj.), India.
Bhandari
S C
SC
Tulsiani
K L
KL
Kumar
Y
Y
D000328:Adult; D000368:Aged; D000375:Aging / Q000502:physiology*; D001049:Apnea / Q000503:physiopathology*; D002245:Carbon Dioxide / Q000502:physiology; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D008991:Monitoring, Physiologic / Q000379:methods; D010100:Oxygen / Q000502:physiology; D010102:Oxygen Inhalation Therapy; D011300:Preoperative Care; D012129:Respiratory Function Tests; D013997:Time Factors
D002245:Carbon Dioxide; D010100:Oxygen