A nurse is assisting with teaching a newly licensed nurse about preventing puncture injuries. Which of the following instructions should the nurse include?

D. Tachycardia refers to an elevated heart rate. In circulatory overload, the heart may attempt to compensate for the increased fluid volume by pumping faster. This compensatory mechanism aims to maintain adequate tissue perfusion despite the excessive fluid burden.

A. Diaphoresis refers to excessive sweating. It is not typically associated with circulatory overload. Instead, diaphoresis can occur in conditions such as fever, anxiety, or during physical exertion.

B Hypotension refers to low blood pressure. In circulatory overload, the excess fluid in the circulatory system can lead to increased blood pressure rather than hypotension. Hypotension is more commonly associated with hypovolemia (low blood volume) rather than hypervolemia.

C. Weight loss is not a characteristic finding in circulatory overload. On the contrary, patients with fluid overload often experience weight gain due to retained fluid in the body tissues and bloodstream.

D. The nurse should promptly notify the healthcare provider to discuss the allergy history and request an alternative antibiotic that is not structurally related to penicillin or cephalosporins. Examples of alternative antibiotics may include antibiotics from different classes such as macrolides or fluoroquinolones, depending on the indication and sensitivity profile.

A. Diphenhydramine (Benadryl) is an antihistamine that can help manage allergic reactions. However, it should not be used as a standalone precautionary measure for a client with a history of anaphylaxis to penicillin. Anaphylaxis is a severe allergic reaction that can lead to life-threatening symptoms such as difficulty breathing, swelling, and low blood pressure.

B. Before taking any further steps, the nurse should clarify and confirm the nature and severity of the client's allergic reaction to penicillin. Anaphylaxis is a serious allergic reaction characterized by rapid onset and potentially life-threatening symptoms. Clarifying the history ensures accurate decision- making regarding the administration of cephalexin.

C. This is not recommended without further clarification and assessment. Given the history of anaphylaxis to penicillin, there is a significant risk of cross-reactivity with cephalosporins like cephalexin. Cephalosporins have a structural similarity to penicillin and can provoke allergic reactions in individuals with penicillin allergy, including anaphylaxis.