Ventilation Mode Selection and Management

Introduction to Ventilation Modes

The American Thoracic Society recommends Pressure Control Ventilation (PCV) for patients requiring complete ventilatory control, as it delivers mandatory breaths at preset intervals with a set inspiratory pressure, regardless of patient effort 1
The European Society of Intensive Care Medicine suggests Pressure Support Ventilation (PSV) for awake, spontaneously breathing patients during weaning, as it requires patient-initiated breaths and provides variable support based on patient demand 2

PCV delivers mandatory breaths at preset intervals with a set inspiratory pressure, regardless of whether the patient initiates a breath, and provides complete ventilatory support with no requirement for patient effort 1
PSV requires patient-initiated breaths, with the ventilator delivering a preset pressure support level, and allows patients greater control over breathing pattern, respiratory rate, and inspiratory time 3

The British Journal of Anaesthesia reports that volume-controlled ventilation (VCV) appears superior to PCV for preventing postoperative pulmonary complications in surgical patients 4
In patients with mild-to-moderate Acute Respiratory Distress Syndrome (ARDS), PSV maintained lung-protective ventilation while improving patient-ventilator interaction compared to PCV, according to the Intensive Care Medicine journal 2

High levels of PSV can cause central apneas during sleep, particularly in patients with heart failure, leading to major sleep fragmentation, as reported by the Intensive Care Medicine journal 3
The level of pressure support must be carefully titrated to prevent hyperventilation while avoiding under-assistance, according to the Intensive Care Medicine journal 3

Patients requiring complete ventilatory control, such as those who are heavily sedated, paralyzed, or unable to trigger, should be placed on PCV, as recommended by Praxis Medical Insights 1
Awake, spontaneously breathing patients during weaning should be placed on PSV, as it reduces work of breathing while maintaining respiratory muscle activity, according to the Intensive Care Medicine journal 2

During PSV, monitor for central apneas, adjust pressure support to maintain normocapnia, and avoid PaCO₂ <35 mmHg, especially during sleep, as recommended by the Intensive Care Medicine journal 3
During PCV, continuously monitor delivered tidal volumes and adjust pressure settings accordingly to prevent volutrauma, according to the British Journal of Anaesthesia 4

In patients with severe COPD, pressure control ventilation may improve sleep quality by allowing complete respiratory muscle rest, according to the European Society of Intensive Care Medicine 5
High pressure control can result in dangerously high tidal volumes, increasing the risk of barotrauma, ventilator-associated injury, and respiratory muscle atrophy, as reported by the European Society of Intensive Care Medicine 5
In difficult-to-wean patients, low-level pressure support ventilation can increase total sleep time and sleep efficiency compared to spontaneous breathing, as found by the European Society of Intensive Care Medicine 5
Pressure control ventilation can provide guaranteed minute ventilation regardless of patient effort, but may pose risks due to high tidal volumes, as noted by the European Society of Intensive Care Medicine 5
The use of modest pressure support with prolonged expiratory time and PEEP (3-5 cmH₂O) can help offset intrinsic PEEP in COPD patients, according to the American Thoracic Society 5