A nurse is teaching a parent about increasing vitamin C in her toddler's diet. Which of the following food choices should the nurse recommend as the best source of vitamin C?

A. Atrial fibrillation: This dysrhythmia is characterized by an irregularly irregular rhythm with absent or unidentifiable P waves, not a prolonged constant P-R interval.

B. Premature atrial complexes: PACs involve early P waves that may have a normal or slightly different P-R interval, but they do not cause a consistently prolonged P-R interval across all beats.

C. First-degree atrioventricular block: A constant P-R interval greater than 0.20 seconds indicates a first-degree AV block. The atrial impulses are delayed at the AV node, but all impulses are conducted to the ventricles, producing a regular rhythm with prolonged P-R intervals.

D. Complete heart block: In complete heart block (third-degree AV block), there is no relationship between P waves and QRS complexes. The P-R interval is variable, unlike the constant prolongation seen in first-degree AV block.

Rationale:

• Titrate the rate of infusion to maintain the client's blood pressure at least 90/60 mm Hg: The nurse should follow the ordered transfusion rate and not titrate it based on blood pressure. The priority is to transfuse the blood safely and at the prescribed rate, while monitoring the client's response. Blood pressure will improve as the blood volume is restored.
• Obtain the first unit of packed RBCs from the blood bank: This is necessary to correct the client’s anemia (Hgb 9.1 g/dL, Hct 27%) and address the suspected acute blood loss indicated by positive hemoccult stool and hemodynamic changes.
• Document the blood product transfusion in the client's medical record: Accurate documentation ensures legal compliance, tracks the administration, and records the client’s response, including any adverse events, supporting continuity of care.
• Stay with the client for the first 15 min of the transfusion: Most transfusion reactions occur during the first 15 minutes. Close observation allows for immediate intervention if the client develops fever, hypotension, or other adverse effects.

• Start an IV bolus of lactated Ringer's solution: Lactated Ringer’s contains calcium which can cause clotting in the transfusion line. Using LR can lead to hemolysis or transfusion complications. Only 0.9% sodium chloride should be used for flushing or running alongside blood transfusions.