Describe the physiological consequences of positive end expiratory pressure.
Points required included a definition of PEEP, both intrinsic and extrinsic.
The important physiological consequences that need to be discussed are respiratory including
increased FRC, increased compliance and decreased work of breathing.
Cardiovascular consequences include decreased venous return and subsequently decreased
cardiac output and an increased pulmonary vascular resistance.
Renal consequences include decreased renal blood flow and increased ADH
Effects on intra-abdominal pressure, hepatic blood flow and the beneficial effects in cardiac
failure earned marks.
Reference: Nunn 6th edition p. 431.