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The respiratory therapist is transporting a patient with a nasal cannula running at 6 L/min. For the E-cylinder to last at least 1 hour, what is the minimum amount of pressure it must contain?

A. 1000 psig
B. 1200 psig
C. 1400 psig
D. 1600 psig

Answer :

Final answer:

An E cylinder with a nasal cannula running at 6 L/min requires a minimum of 1200 psig pressure to last an hour. This is calculated knowing that each 100 psig delivers approximately 3L of oxygen.

Explanation:

For the E cylinder with a nasal cannula running at 6 L/min to last for at least an hour, it must contain a minimum pressure. Medical gas cylinders like the E cylinder deliver a certain volume of gas depending on their pressure and the flow rate.

In this case, the flow rate is 6 L/min, and we want it to last for 60 minutes, which means we need 360 L of oxygen. Knowing that each 100psi delivers approximately 3L of oxygen, we can calculate the required pressure. So we need (360L ÷ 3 L/100 psi) which equals 12000 psi, but since the pressure in the cylinder is measured in hundreds(psig), the answer is 1200 psig. So, the E cylinder must contain a minimum of 1200 psig to ensure a supply of oxygen for at least an hour at a flow rate of 6 L/min.

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