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Objective: The purpose of this research was to compare the mean hemoglobin oxygen de-saturation time by using tidal volume breathing technique for three minutes and eight vital capacity breathing technique for preoxygenation in patients with ineffective face mask seal. Methods: This study included 60 patients with beard, moustache, large nasal bridge, facial anomalies, nasogastric tube and edentulous patients. They were randomized into 2 groups after achieving documented informed consent. Group-A was preoxygenated with TV breathing technique for three minutes at an oxygen flow of 10 litres per minute. Whereas, Group-B was preoxygenated with eight VC breaths for one minute at an oxygen flow of 10 litres per minute. Results: The age of the participants varied from 22 years to 65 years with an average of 44.63±10.03 years. There were 29(48.3%) male and 31(51.7%) female patients in the research group. Both the groups were comparable in respect of mean age (p=0.839) and gender distribution (p=0.796). The mean hemoglobin oxygen desaturation time was considerably longer in VC breathing group (6.77±1.10 vs. 3.43±.50 minutes; p=0.000) in contrast to TV breathing group regardless of age and gender of patients. Conclusion: The mean hemoglobin oxygen desaturation time was substancially longer in vital capacity breathing group (6.77±1.10 vs. 3.43±.50 minutes; p=0.000) in contrast to tidal volume breathing group regardless of patient's age and gender in patients with ineffective face mask seal undergoing elective surgery.

Comparison Between Tidal Volume and Vital Capacity Breathing Techniques of Preoxygenation in Patients with Ineffective Facemask Seal