Difference between revisions of "Positive end expiratory pressure"
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* Increased FRC | * Increased FRC | ||
* Prevents closing of alveoli, thereby reducing airway opening pressure | * Prevents closing of alveoli, thereby reducing airway opening pressure | ||
* Increase Palv, making West's zone move more caudally, thereby reducing physiologic shunt from Zone 3 | |||
== Consequences of PEEP == | |||
* Barotrauma/volutrauma: Increased peak airway pressure at high PEEP | |||
* Decreased venous return from IVC due to increased thoracic pressure | |||
* Decreased pulmonary blood flow | |||
** In patients with pulmonary hypertension, can worsen R heart strain | |||
* Elevation in ICP; decrease in cerebral perfusion pressure | |||
** CPP = MAP - ICP | |||
== Surgeries where PEEP should be used cautiously == | |||
Revision as of 08:56, 9 August 2021
Positive end expiratory pressure (PEEP) is the amount of pressure that remains at the end of the expiratory phase which can be set in mechanically ventilated patients.
Benefits of PEEP
- Increased FRC
- Prevents closing of alveoli, thereby reducing airway opening pressure
- Increase Palv, making West's zone move more caudally, thereby reducing physiologic shunt from Zone 3
Consequences of PEEP
- Barotrauma/volutrauma: Increased peak airway pressure at high PEEP
- Decreased venous return from IVC due to increased thoracic pressure
- Decreased pulmonary blood flow
- In patients with pulmonary hypertension, can worsen R heart strain
- Elevation in ICP; decrease in cerebral perfusion pressure
- CPP = MAP - ICP
Surgeries where PEEP should be used cautiously
Top contributors: Tony Wang