Which cycling method is used in pressure-controlled ventilation?

In pressure-controlled ventilation, the primary cycling method utilized is pressure cycling. This method focuses on delivering a preset pressure during each breath, allowing the ventilator to maintain the pressure within the specified limits. As soon as the ventilator detects that the set pressure has been reached, it will cycle to the next phase of ventilation, regardless of the flow or volume achieved, which differentiates it from volume-controlled modes where the cycle relies on the delivery of a specific tidal volume.

The key distinction here is that pressure cycling emphasizes controlling the airway pressure rather than the volume of air delivered. This is especially beneficial in situations where lung compliance may be compromised or when the patient presents with variable lung mechanics. By prioritizing pressure, the risk of barotrauma due to excessive tidal volumes can be minimized, making pressure-controlled ventilation a safer option in certain clinical scenarios.