What question did this study set out to answer?

The research aims to investigate how positive end-expiratory pressure (PEEP) affects pulmonary microvascular perfusion in lungs.

Pulmonary Microvascular Perfusion during Positive End-Expiratory Pressure (PEEP)

View Full Paper

Ask AI

Bookmark

Authors

Demonstrates reduced perfusion in the lungs during increased airway pressure, suggesting direct capillary effects in dogs.

The research aims to investigate how positive end-expiratory pressure (PEEP) affects pulmonary microvascular perfusion in lungs.
Used an in-vivo microscope on anesthetized dogs during a left thoracotomy
Assessed microvascular perfusion at baseline and during 5 cm and 15 cm H₂O PEEP
Restored cardiac output with dextran-70 infusion to observe effects on perfusion
15 cm H₂O PEEP caused a significant decrease in pulmonary microvascular perfusion
Cardiac output decreased alongside perfusion
Despite restoring cardiac output, perfusion remained 70% below baseline
Capillaries appeared flat and constricted under PEEP conditions

Nieman et al. (1988) studied this question.

View Full Paper

Ask AI

Bookmark