Pre-oxygenation: an easy method for all elective patients.
The transparent plastic facemask has been investigated as a pleasant method of pre-oxygenation for elective non-high risk cases in 60 healthy ASA I or II patients randomly allocated to two groups. The patients in the pre-oxgenated group (n = 30) received 8 litre min-1 oxygen through a plastic facemask for 3 min whereas those in a control group (n = 30) were not pre-oxygenated. In all patients anaesthesia was induced with propofol 2.5 mg kg-1, fentanyl 1 ug kg-1 and atracurium 0.6 mg kg-1. Manual ventilation of the lungs using a Mapleson A breathing system was performed for 2 min with 50% oxygen in nitrous oxide prior to oral intubation. Arterial saturation in the pre-oxygenated group rose significantly from a mean baseline value of 96.4 (+/- 0.9)% to 99 (+/- 0.8)% (P < 0.01) and then remained stable both after induction and intubation: 99.1 (+/- 0.8)% and 98.9 (+/- 1.1)% respectively. In the control group arterial saturation dropped sharply within 20 s following induction to a mean of 89.8 (+/- 3.1)%, and it was 30 s before arterial saturation reached the equivalent value in the pre-oxygenated group as a result of manual inflation of the lungs. An 8 litre min-1 oxygen flow via a standard transparent plastic facemask is a simple, feasible and acceptable method for routine pre-oxygenation for all elective cases.
Maurette
P
P
Service d'Anaesthésie-Réanimation, Hopital Pellegrin, Place Amelie Rabat Leon, 33076 Bordeaux, France.
O'Flaherty
D
D
Adams
A P
AP
D000328:Adult; D000368:Aged; D000758:Anesthesia; D017558:Elective Surgical Procedures; D005260:Female; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D008297:Male; D008397:Masks; D008875:Middle Aged; D010092:Oximetry; D010100:Oxygen / Q000097:blood; D010102:Oxygen Inhalation Therapy / Q000009:adverse effects / Q000379:methods*; D011446:Prospective Studies
D010100:Oxygen