A study to compare the ventilation patterns produced with intermittent positive pressure breathing to those produced by deep breathing

Much research has been done on IPPB and to date little evidence has been provided to support the use of this modality. Our study was designed to investigate the ventilation pattern produced by IPPB with deep breathing compared to deep breathing only in patients who have had suspected pulmonary emboli. Ventilation images of the lungs obtained through the inhalation of the radio-active gas Krypton were used for this comparison. Twenty-three subjects were randomly assigned to one of two groups. Group A comprised 12 subjects who received the radio-active gas via IPPB. The 11 subjects in group B received the radio-active gas via the routine circuit, while doing diaphragmatic breathing. The data were analysed using the Mann-Whitney U-test. It was shown that in patients with suspected pulmonary emboli there is no evidence that IPPB would increase alveolar ventilation more than deep breathing exercises would.

Abstract licence: CC BY

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