In basic life support delivery of oxygen is –
**Core Concept**
The delivery of oxygen in basic life support is crucial for maintaining adequate oxygenation of vital organs, particularly during cardiac arrest or respiratory failure. The correct method of oxygen delivery is essential to prevent hypoxia and support the body's metabolic needs.
**Why the Correct Answer is Right**
The correct method of oxygen delivery in basic life support involves the use of a non-rebreather mask (NRB) or a bag-valve-mask (BVM) device. The non-rebreather mask delivers high concentrations of oxygen (up to 60-80%) by allowing the patient to breathe in oxygen-rich air from the reservoir bag and exhaling through the mask's one-way valve. This prevents the rebreathing of carbon dioxide, which can lead to respiratory acidosis. The bag-valve-mask device, on the other hand, uses a bag to provide positive pressure ventilation, allowing for the delivery of a high concentration of oxygen to the patient.
**Why Each Wrong Option is Incorrect**
* **Option A:** A simple face mask is not suitable for delivering high concentrations of oxygen, as it does not have a reservoir bag to provide a continuous flow of oxygen.
* **Option B:** A nasal cannula is not an effective method for delivering oxygen during basic life support, as it delivers a low concentration of oxygen (up to 40%) and is not suitable for patients with respiratory failure or cardiac arrest.
* **Option C:** A tracheostomy mask is not used for basic life support, as it requires a tracheostomy tube to be in place, which is not a standard procedure in basic life support.
**Clinical Pearl / High-Yield Fact**
In basic life support, the use of a non-rebreather mask or bag-valve-mask device is critical to ensure adequate oxygenation of the patient. Remember the mnemonic "O2-NO-CO2" to recall the correct method of oxygen delivery: Oxygen (O2) is delivered through the non-rebreather mask or bag-valve-mask device, while carbon dioxide (CO2) is prevented from rebreathing through the one-way valve.
**Correct Answer: . Non-rebreather mask**