A check valve is used to prevent _______ for safety reasons and to ensure that the water flows in the system in only one direction

List four waste products dissolved in urine

A heavy dresser fell onto a 76-year-old male's foot as he attempted to move it across his bedroom floor. His right foot and ankle are bruised, but the patient is refusing treatment or transport since it does not hurt. Which statement made by the patient during your assessment would be most concerning and warrant contact with medical command for further advisement?

A) "I have a history of congestive heart failure." B) "I was recently diagnosed with cataracts." C) "I have been told I have peripheral neuropathy." D) "I fell and broke my left ankle last year."