What formula is used to calculate the duration of cylinder flow for an oxygen tank?

The correct choice involves understanding how to effectively calculate the duration of flow from an oxygen tank, which is determined by taking into account the gauge pressure and the specifics of the tank itself.

The formula for calculating the duration of flow for an oxygen tank is based on the gauge pressure in psi and the tank factor, which correlates to the size of the tank and the flow rate in liters per minute. The tank factor represents the volume of the gas in the tank and is necessary to understand how long the oxygen will last when it's flowing at a certain rate.

By multiplying the gauge pressure by the tank factor, you quantify the total available volume of oxygen. Dividing this by the flow rate in liters per minute gives you the duration in minutes that the oxygen will last at the specified flow rate. This calculation is crucial in clinical settings to ensure that patients receive adequate oxygen therapy over a safely determined period.