A nurse is providing teaching to an older adult client about methods to promote nighttime sleep.
Which of the following instructions should the nurse include?

Choice A rationale:

A client who received a Mantoux test 48 hr ago and has an induration does not require immediate follow-up care. An induration at the injection site indicates a positive reaction, but further evaluation and management are necessary, not urgent.

Choice B rationale:

A client taking warfarin with an INR of 1.8 requires follow-up care. The normal range for INR in a client taking warfarin is usually 2.0 to 3.0. An INR of 1.8 suggests inadequate anticoagulation, putting the client at risk of thromboembolic events. Dose adjustment or other interventions are needed to bring the INR within the therapeutic range.

Choice C rationale:

A client scheduled for a colonoscopy and taking sodium phosphate does not necessarily require immediate follow-up care. However, sodium phosphate can cause electrolyte imbalances, so monitoring for any signs of electrolyte disturbances is essential, but it does not mandate urgent intervention.

Choice D rationale:

A client taking bumetanide with a potassium level of 3.6 mEq/L requires follow-up care. The normal range for potassium is typically 3.5 to 5.0 mEq/L. A potassium level below the normal range (hypokalemia) can lead to cardiac arrhythmias and muscle weakness. The client may need potassium supplements or dietary adjustments to correct the imbalance.