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Respiratory

AMBU BAG

The Ambu bag, or bag valve mask (BVM), is a handheld manual resuscitator used to provide positive pressure ventilation to patients who are not brea...

Technical Specifications

ComponentsA self-inflating bag, a one-way (unidirectional) valve to prevent rebreathing, a face mask (available in various sizes), and typically an oxygen reservoir and tubing for delivering high concentrations of oxygen.
Sizing and Volume CapacityAvailable in adult, pediatric, and infant sizes to ensure appropriate volume delivery for different body weights:
AdultTypically 1500–1600 ml capacity (for patients > 40 kg).
PediatricAround 500 ml capacity (for patients 10–40 kg).
Infant/NeonatalApproximately 240 ml capacity (for patients < 10 kg).
Pressure ControlPediatric and infant models commonly feature a pressure-limiting "pop-off" valve, often set to open at around 40-45 cm H\u2082O (centimeters of water), to prevent lung over-inflation in smaller, more delicate airways. Adult bags may also have this feature, which can sometimes be locked if higher pressure is required.
MaterialsOften made from durable, medical-grade silicone rubber, PVC, or polycarbonate materials. Reusable versions are designed to be autoclavable (sterilizable at high temperatures, e.g., 121°C to 134°C) for infection control.
Oxygen DeliveryWhen connected to an external oxygen source via the reservoir bag, the device can deliver oxygen concentrations of 95% to 100%.

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