A nurse is reviewing the medical records of four clients. The nurse should identify that which of the following client findings requires follow-up care?

A. A client who is taking warfarin and has started to breastfeed: Warfarin passes into breast milk in very small amounts and is generally considered compatible with breastfeeding. However, the infant’s coagulation status should be monitored, and follow-up with the healthcare provider is appropriate to ensure safety. B. A client who is taking bumetanide and reports an increase in urinary frequency: Increased urination is an expected pharmacologic effect of loop diuretics like bumetanide. This finding does not require follow-up unless accompanied by other concerning symptoms. C. A client who received a Mantoux test 48 hr ago and has an induration: A positive Mantoux test requires interpretation by a healthcare provider, but the presence of induration alone is a normal finding that triggers standard follow-up for tuberculosis screening. D. A client who is scheduled for a colonoscopy and is taking sodium phosphate: Sodium phosphate is commonly used as a bowel prep for colonoscopy. As long as the client follows the prescribed instructions and has no contraindications, this does not require additional follow-up.