A nurse is preparing to measure a client’s oxygen saturation and notes edema of the client’s hands and thickened toenails.
Where should the nurse apply the pulse oximeter probe?

Choice A rationale
Turning the torso at the waist when reaching for objects can actually increase the risk of back injury. It’s important to keep the back straight and bend at the knees when lifting or reaching for objects.
Choice B rationale

Using ice packs intermittently for 48 hours is a common recommendation for acute lower back pain. Ice can help reduce inflammation and numb the area, providing relief. It’s important to use the ice packs intermittently, not continuously, to avoid frostbite.
Choice C rationale
Using 10 lb arm weights to start strengthening the back muscles is not recommended for someone with acute lower back pain. Heavy lifting can exacerbate the pain and potentially cause further injury. It’s better to start with gentle, low-impact exercises and gradually increase intensity as the back heals.
Choice D rationale
Staying in bed except for toileting during the first 24 hours is not typically recommended for acute lower back pain. While rest is important, prolonged bed rest can actually lead to muscle stiffness and increased pain. It’s generally recommended to stay as active as possible without exacerbating the pain.

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.