Noninvasive Ventilation Summary
Positive pressure ventilation ...
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Description

Noninvasive Ventilation Summary
Positive pressure ventilation that is delivered through a nasal, mask, or helmet interface and without theinsertion of an invasive airway (such as an endotracheal tube or a tracheostomy)
Physiology:
 • Preserves airway clearance and spontaneous breathing
 • Decreases need for sedation
 • Increases functional residual capacity and opens up atelectasis
 • Decreases LV afterload by decreasing transmural pressures
 • Decreases work of breathing by improving pulmonary compliance and counteracting intrinsic PEEP in patients with air trapping
 • Bilevel support augments inspiratory tidal volumes (Vt) and improves ventilation

CPAP - Continuous positive airway pressure
 • Delivers continuous pressure throughout respiratory cycle
 • Supports oxygenation
BIPAP - Bilevel positive airway pressure
 • Delivers preset inspiratory and expiratory pressures
 • Supports oxygenation and ventilation
 • Should monitor Vt and for barotrauma (eg, pneumothorax or pneumomediastinum)
HHFNC - Heated high-flow nasal cannula
 • Delivers heated humidification, increasing tolerance to flows above those provided by traditional nasal cannula.
 • Supports oxygenation and ventilation by washing out CO2 from upper airway
 • Delivered PEEP is variable and depends on set flow and patients' ability to close mouth

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Contributed by

Dr. Gerald Diaz
@GeraldMD
Board Certified Internal Medicine Hospitalist, GrepMed Editor in Chief 🇵🇭 🇺🇸 - Sign up for an account to like, bookmark and upload images to contribute to our community platform. Follow us on IG:  https://www.instagram.com/grepmed/ | Twitter: https://twitter.com/grepmeded/
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