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Synapse
November 1, 1974

Experimental pulmonary edema due to intermittent positive pressure ventilation with high inflation pressures. Protection by positive end-expiratory pressure.

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Authors

HWHanna WebbDTDonald F. Tierney

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Overview

Experimental trial investigates pulmonary edema outcomes in rats under different ventilation pressures, indicating PEEP's protective role.

Key Points

  • This research aims to understand the effects of different ventilatory pressures on pulmonary edema in rats and the protective role of PEEP.
  • Ventilated normal, anesthetized rats using a small animal respirator at varying inspiratory and end-expiratory pressures.
  • Compared pathologic lung changes between control, intermittent positive pressure breathing, and high inspiratory positive pressure breathing groups.
  • Evaluated survival rates and pulmonary edema types in different pressure conditions.
  • HIPPB 45/0 led to alveolar and perivascular edema, severe hypoxemia, and death within one hour.
  • PEEP 45/10 animals maintained normal alveolar conditions and survival, despite high inspiratory pressures.
  • Both HIPPB 30/0 and PEEP 30/10 resulted in perivascular edema, but without severe outcomes.

Cite This Study

Webb et al. (1974) studied this question.

synapsesocial.com/papers/6a0255d4cd2189d558f6021fhttps://doi.org/10.1164/arrd.1974.110.5.556
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