What SpO2 value indicates the need for bag-valve-mask ventilation during monitoring?

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Maintaining adequate oxygenation during monitoring is the priority, especially in children under sedation. SpO2 reflects arterial oxygen saturation, and while a normal reading is typically above 95%, lower values warn that ventilation or airway status may be compromised. When SpO2 falls to about 90% or lower, spontaneous breathing may be insufficient or obstructed, so delivering assisted ventilation with a bag-valve-mask helps provide higher oxygen delivery and positive pressure to recruit and ventilate the lungs. This threshold is used to intervene before oxygenation deteriorates further into more dangerous levels, such as persistent severe hypoxemia that can lead to apnea or bradycardia. An SpO2 around 92% is a sign to reassess and escalate as needed, while an SpO2 of 85% already indicates more urgent, immediate action.