NURSING ANM AND GNM

Detailed explanation-1: -PSV was initially developed to reduce work of breathing in SIMV but evolved into a stand-alone mode of ventilation. PSV augments the patient’s spontaneous inspiratory efforts with the selected level of positive airway pressure.

Detailed explanation-2: -Airway pressure-release ventilation (APRV) uses positive airway pressure to augment spontaneous inspiration (reducing the work of breathing), then reduces the level of positive pressure to allow exhalation.

Detailed explanation-3: -Ventilation Mode Pressure-controlled ventilation (page 454) is the preferred technique in most centres to avoid alveolar overdistension. However, with pressure-controlled ventilation in lungs with low compliance, such as ARDS, the delivery of an adequate minute volume may be difficult.

Detailed explanation-4: -A/C, VCV-Assisted/Controlled, Volume Cycled Ventilation. A/C, PCV-Assisted/Controlled, Pressure Controlled Ventilation (time cycled) SIMV-Synchronized Intermittent Mandatory Ventilation. PSV-Pressure Support Ventilation.