CCRN PEDS Cardiovascular

1. Your pediatric patient has the following parameters HR 80 BP 100/60 SV 40 BSA 0.9 m2 The cardiac index (CI) for this patient is A. 4.4 L/min B. 3.2 L/min/m2 C. 3.5 L/min/m2 D. 3200 mL/m2 2. Calculate the cardiac output for a 16 year old patient with a heart rate of 72 and a stroke volume of 70 mL A. 55% B. 5.04 L/min C. 504 mL/min D. 1.02 L/min 3. What is the mean arterial pressure for a patient with a blood pressure of 110/50 and a heart rater of 80 A. 80 B. 70 C. 50 D. 60 C.The cardiac index for this patient is 3.5. First, you must calculate the cardiac out- put (HR X SV) or (80 X 40 =3200 = 3.2 L/min).Then, use the following equation: (CI = CO/BSA) or (3.2/0.9 = 3.55 L/min/m2) The CI is a more specific indicator of he- modynamic status than cardiac output. The CO has a broader range of 4 to 8 L/min. To make a numbers specific to an individual, the person's body surface area is included in the equation.Then the normal range becomes 2.5-4.0 L/min/m2 B.Normal cardiac output for a 16 year old should be in the range of 4 to 8 L/min. The formula for calculating this value is CO = HR x SV. In this case, 72 (HR) x 70 (SV) = 5040 mL/min. Converted to liters, the answer would equal 5.04 L/min. B. The MAP is a mean pressure that takes into account the fact that the di- astolic phase represents two-thirds of the cardiac cycle. It is calculated as follows: MAP = (2(DBP) + (SBP))/3. If you took the average of the two pressures only, it would not account for the importance of the diastolic phase. The HR is not entered into this calculation. Patients should maintain a MAP of at least 60 mmHg to ensure adequate perfusion to the brain and kidneys. D. The ejection fraction should be over 50%.This is the amount of blood ejected