Spirometric, gasometric and electrocardiographic studies in patients with extreme obesity prepared for surgical...

Spirometric, gasometric and electrocardiogarphic studies were carried out in 17 patients at rest, who were treated surgically for extreme obesity (overweight from 52 to 175 per cent in relation to the normal weight). The measurements were made before operation. It was found that the mean spirometric values were within the range of acceptable deviations from the normal value. The residual volume showed a tendency towards decreasing, especially in young patients. The values of dynamic parameters indicated a tendency towards ventilatory changes of a restrictive type in both groups. Minute ventilation at rest increased proportionally to obesity. Decreased values of respiratory equivalent indicated a good economy of respiration in obese persons when at rest. The mean gasometric values in capillary blood at rest were also within the acceptable range of abnormalities. Electrocardiographic tracings taken at rest showed considerable changes in the group of more obese persons.