What is the primary purpose of Pressure Support Ventilation (PSV)?

Pressure Support Ventilation (PSV) primarily aims to decrease the work of breathing for patients who require assistance but are also capable of initiating their own breaths. In this mode of ventilation, a preset amount of pressure is delivered to support each breath the patient initiates. This helps to reduce the respiratory effort and energy expenditure needed by the patient while maintaining spontaneous breathing.

By alleviating the work of breathing, PSV not only enhances the comfort level for the patient but can also help prevent respiratory muscle fatigue, especially in patients who may be struggling due to underlying respiratory conditions. It is particularly beneficial in weaning patients off mechanical ventilation, as it allows for patient-initiated breaths while providing the necessary support to ensure adequate ventilation.

The other options do not align with the primary function of PSV. While PSV does not fully control a patient’s breathing, provide oxygen enrichment, or automatically initiate breaths independently without patient effort, its focus remains on offering assistance during the patient's own initiated breaths to promote better respiratory mechanics and comfort.