Pressure support ventilation
Pressure Support Ventilation (PSV) is a mode of Mechanical Ventilation that is patient-triggered, pressure-limited, and flow-cycled. It is often used in the weaning process as it requires the patient to initiate every breath.
Pronunciation
Pressure Support Ventilation: /ˈprɛʃər səˈpɔrt ˌvɛntəˈleɪʃən/
Etymology
The term "Pressure Support Ventilation" is derived from its function. "Pressure Support" refers to the additional pressure provided by the ventilator to support the patient's spontaneous breathing efforts, and "Ventilation" refers to the process of exchanging or replacing air in any space to provide high indoor air quality.
Function
In Pressure Support Ventilation, the ventilator augments the patient's spontaneous inspiratory effort with a preset level of pressure, reducing the work of breathing. The patient controls the rate and depth of breathing, and the ventilator ends the inspiratory phase when flow decreases to a preset percentage of the peak flow.
Related Terms
- Mechanical Ventilation: The method to mechanically assist or replace spontaneous breathing.
- Inspiratory Effort: The effort made by the diaphragm and intercostal muscles to draw air into the lungs.
- Weaning Process: The process of gradually reducing the patient's dependence on the ventilator.
- Spontaneous Breathing: Breathing that is initiated and controlled by the patient's own respiratory muscles.
See Also
External links
- Medical encyclopedia article on Pressure support ventilation
- Wikipedia's article - Pressure support ventilation
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