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PEEP/CPAP – Questions And Expert Verified Solutions
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PEEP/CPAP – Questions And Expert Verified Solutions
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PEEP/CPAP – Questions And Expert Verified SolutionsWhat is the application of pressure above atmospheric at the airway
throughout EXPIRATION? Right Ans - PEEP/CPAP
What are the goals of PEEP? Right Ans - Increase tissue oxygenation
Maintain a Pa02 greater than 60mmHg
Recruit alveoli
What are the indications for PEEP? Right Ans - Cardiogenic pulmonary
edema (LEFT Side of Heart)
ARDS
Refractory Hypoxemia
Increase Functional Residual Capacity (FRC)
How does PEEP help Cardiogenic Pulmonary Edema Right Ans - Pushes
fluid into the interstitial spaces preventing transudation
What is transudation? Right Ans - Movement of fluid outside the blood
vessel.
What is the treatment for cardiogenic pulmonary edema? Right Ans - 8-
12cmH20 with an Fi02 of 100%
How does PEEP increase FRC (RV + ERV) ? Right Ans - It opens the
collapsed alveoli
Increases Reserve Volume
What is Functional Residual Volume (FRC)? Right Ans - Volume of air in the
lungs at the end of a passive exhalation
How is PEEP beneficial to ARDS (low compliance, really stiff lungs)? Right
Ans - Increases compliance
Increase FRC
Decreases shunting
What are the contraindications of PEEP? Right Ans - Unilateral lung disease
Hypovolemia
Hypotension
, Untreated Pneumothorax
Increased ICP
What are the hazards of PEEP? Right Ans - Barotrauma
Increased intra-thoracic pressure
Increased ADH
Decreased Cardiac Output
Decreased Venous Return
Decreased Blood Pressure
Loss of Thoracic Pump
ALL EFFECTS OF CMV MAGNIFIED!
What are the physiological effects of PEEP on the lungs? Right Ans -
Baseline pressure increases
Increased intrapleural pressures
Increase FRC
Increase ICP
Increase VD
Increase Alveolar Volumes
Increase Compliance
How does PEEP increase FRC? Right Ans - Recruiting collapsed alveoli by
increase in volume that occurs during exhalation improves oxygenation
How does PEEP increase VD in lung disease & healthy lungs? Right Ans - By
distending the alveoli
What are the physiological effects of PEEP on the cardiovascular system?
Right Ans - Decrease Venous Return
Decrease Cardiac Output
Decrease Blood Pressure
Decrease Intra-pulmonary Shunting
Decrease A-a gradient (A-aD02)
Decrease PA02
Increase Mixed Venous Value (Pv02)
Increase Pa02
How should PEEP be initiated? Right Ans - Start off at 5cmH20 and
increase in increments of 3 to 5cmH20
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