Which of the Following Statements Are True About Low-Flow O₂

question 8

Multiple Choice

Which of the following statements are true about low-flow O₂ delivery systems?
1) The greater the patient's inspiratory flow, the greater is the FiO₂.
2) All low-flow devices provide variable O₂ concentrations.
3) The O₂ provided by a low-flow device is diluted with air.
4) The patient's flow usually exceeds that from a low-flow device.

• A)1 and 3 only
• B)1, 2, and 3 only
• C)3 and 4 only
• D)2, 3, and 4 only

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Definitions:

Methanol

A light, volatile, colorless liquid with a distinctive odor, used primarily as a fuel, solvent, or antifreeze.

Lewis Structure

A diagram representing the valence electrons of atoms as dots and covalent bonds as lines in a molecule.

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A colorless, strong-smelling gas used in chemical manufacturing and as a preservative in mortuaries and medical labs, with chemical formula CH2O.

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Ethylene, also known as ethene, the simplest alkene consisting of a carbon-carbon double bond and the chemical formula C2H4.