What is the role of pressure control (PC) in noninvasive ventilation (NIV)?

Updated: Jun 18, 2020
  • Author: Guy W Soo Hoo, MD, MPH; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Answer

Answer

The above considerations and approach to adjustment are best suited for those with COPD or chronic heart failure as the primary cause of their hypercapnia or hypoxemic respiratory distress and failure. Patients with neuromuscular disorders (amyotrophic lateral sclerosis, postpolio syndrome, muscular dystrophy) or thoracic cage disorders (severe kyphoscoliosis) may fare better with other ventilatory modalities. The most current noninvasive ventilators have PC or average AVAPS options. In PC ventilation, both the inspiratory pressure and the inspiratory time are set and fixed. This differs from BiPAP in which the patient controls the inspiratory time. This modality may be useful in the neuromuscular disease patient who does not have the respiratory muscle strength to generate an adequate inspiratory time. Setting an increased inspiratory time may increase the tidal volume provided, but it may also increase patient-ventilator dyssynchrony if the set inspiratory time is longer than the patient's desired inspiratory time.


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