A patient with cardiovascular failure has a blood pressure of 80/56, a heart rate of 100, a central venous pressure of 24, and a respiratory rate of 12. Which of the following is the patient's pressure adjusted heart rate (PAR)?
1. 9.5
2. 15.0
3. 37.5
4. 48.6
3
Rationale: To do this calculation, the nurse must know how to calculate mean arterial pressure (MAP), know the formula for PAR scoring, and be able to calculate. For the patient, MAP = SBP + (2 ´ DBP)/3; PAR score is HR ´ CVP/MAP; MAP = 64; PAR = 100 ´ 24/64 = 37.5. The answers of 9.5, 15.0, and 48.6 are incorrect. For the answer of 9.5, the patient would need to have a BP 100/64, HR 60, and CVP 12; for the answer of 15.0, the patient would need to have a BP of 120/84, HR 80, and CVP 18; and for the answer of 48.6, the patient would need to have a BP of 90/66, HR 120 and CVP 30.
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