The effect of manual hyperinflation on total static compliance of the lung in mechanically ventilated cardiac surgery patients

To determine the effect of Manual Hyperinflation on total Static compliance of Lung in Mechanically Ventilated Cardiac Surgery Patients. Study design Experimental Control group design.

ICU CTVS Department, All India Institute of Medical Science, New Delhi.

Many studies on the efficacy of Manual hyperinflation and different chest physiotherapy maneuvers carried out till date. However in most studies the effects of these procedures on respiratory functions were assessed by spirometric measurement only. In some studies report the effects on respiratory mechanics as such. This study attempt to define how a specific chest physiotherapy maneuver (MH) affect the mechanics of the respiratory system and relevance importance in intensive care units for cardiac surgery patients.

The measurement of compliance before the application of any physiotherapy maneuvers. Then for group A 30 subject are given five manually hyperinflated breaths with 100% O₂, pressure gauge 30 to 40 cm H₂O followed in a period of 30 secs ET suctioning 3 consequent session of manually hyperinflation and suctioning were done. Then immediately after the treatment session the second set of reading of variables was taken. Subsequent readings were taken after every half an hour till 2 hours post treatment. The similar procedure was carried out for group B 30 subjects provided hyperinflation was replaced by hyperoxygenation given as inspiratory hold for 2 sec. with FiO₂ 100% from ventilator.

The result does not show any significant difference in the benefits of hyperinflation over controls. Although an early benefit on static lung compliance was measured in mechanical ventilated patients of experimental group as compared to control group.

The effect of manual hyperinflation on total static compliance of lung was improved better than the hyperoxygenation but the study results were statistically insignificant.