A nurse is reinforcing home safety instructions for a patient with a history of falls.
Which statement should the nurse identify as an indication that the patient understands the instructions?

Choice A rationale
Applying the pulse oximeter probe to the toe might not provide an accurate reading if the client has poor peripheral circulation. Additionally, thickened toenails can interfere with the reading.
Choice B rationale

Edema in the hands can affect the accuracy of a pulse oximeter reading. The probe might not fit properly or provide a reliable reading if the finger is swollen.
Choice C rationale
Applying the pulse oximeter probe to a skin fold is not recommended. The probe needs to be placed on a relatively flat, thin area of skin to accurately measure oxygen saturation.
Choice D rationale
The earlobe is a suitable alternative site for pulse oximetry if the fingers and toes are not viable options. The earlobe is typically less affected by peripheral vasoconstriction, which can occur with hypothermia, certain medications, and certain diseases. Therefore, Choice D is the correct answer.

Choice A rationale
It is a good practice to change the batteries in smoke detectors annually to ensure they are working properly. This statement does not indicate a need for further instruction.
Choice B rationale
Using a walker when going upstairs can be dangerous due to the risk of falls. It is recommended that individuals use handrails or assistance when navigating stairs, not a walker. This statement indicates that the client needs further instruction.
Choice C rationale
Leaving a night light on can help prevent falls by providing visibility during the night. This statement does not indicate a need for further instruction.
Choice D rationale

Installing grab bars in the bathroom, especially near the toilet and in the shower, can provide support and prevent falls. This statement does not indicate a need for further instruction.