Final answer:
For administering low-flow oxygen less than 7 liters per minute, a nasal cannula, Venturi mask, and possibly a simple mask are appropriate. Partial rebreather and non-rebreather masks are not suitable for such low-flow requirements.
Step-by-step explanation:
The appropriate methods for administering low-flow oxygen of less than 7 liters per minute to a patient are a. Nasal cannula, c. Venturi mask, and possibly b. Simple mask, depending on the oxygen concentration required. A nasal cannula is typically used for low-flow oxygen rates, typically 1-6 liters per minute, delivering approximately 24-44% oxygen. The Venturi mask is adjustable for oxygen concentrations of 24-50% and is used for exact oxygen concentration delivery. Simple masks generally deliver oxygen concentrations from 35-50%, but is less precise than the Venturi mask and is suited for flows of 5-10 liters per minute.
Conversely, a partial rebreather mask and a non-rebreather mask, typically require flows higher than what was ordered as they are designed for higher oxygen delivery, and therefore, they are not appropriate for a low-flow oxygen order of less than 7 liters per minute.