A nurse is teaching a client about skin cancer prevention. Which of the following statements by the client indicates an understanding of the teaching?

A. Flush the tubing with 30 mL of water every 4 hr. Flushing the tube regularly helps maintain patency, prevent clogging, and ensure that the feeding is delivered effectively. This is a standard practice in managing enteral feeding systems.
B. Check for gastric residual every 12 hr. Gastric residuals should typically be checked every 4 to 6 hours, or per facility protocol, especially in clients at risk for aspiration. Waiting 12 hours is too long and may delay identifying feeding intolerance.
C. Place enough formula in the container to last 18 hr. Open systems should have fresh formula added every 4 hours to reduce the risk of bacterial contamination. Leaving formula in the feeding bag for 18 hours exceeds safety guidelines and increases infection risk.
D. Maintain bed elevation at 20°. The head of the bed should be elevated to at least 30 to 45 degrees to reduce the risk of aspiration. A 20° elevation is insufficient and does not provide adequate protection during feeding.

A. 1+ pedal edema. Mild pedal edema is typically not associated with instability or falls, unless it progresses to severe swelling that affects mobility or balance. It is a sign of fluid retention but not a direct fall risk indicator on its own.
B. Bruises on the lower extremities. Bruising can be a sign of previous falls or trauma, but it is not itself a cause or indicator of fall risk. While it may prompt further investigation, it does not confirm fall risk independently.
C. Impaired vision. Visual impairment is a significant risk factor for falls because it affects depth perception, ability to detect hazards, and overall spatial awareness. Clients with impaired vision are more likely to trip, misjudge steps, or bump into obstacles.
D. Coarse rhonchi auscultated over the trachea. Coarse rhonchi are respiratory findings typically related to mucus in the airways and do not directly contribute to fall risk unless accompanied by severe respiratory distress or fatigue.