Final answer:
The most reliable pulse site for infants is the radial artery, and for an infant's pulse rate measured at 130 ± 5 beats/min, the percent uncertainty is approximately 3.85%.
Step-by-step explanation:
In infants and young children, the pulse should most reliably be taken at the radial artery, as indicated in health guides and illustrated by various figures displaying pulse sites. When measuring an infant's pulse rate, which can be an essential part of neonatal care and assessments like the Apgar score, it's important to calculate uncertainties to understand the accuracy of the measurements. In a given example, an infant's pulse rate is measured to be 130 ± 5 beats/min. To calculate the percent uncertainty of this measurement, one can use the formula:
Percent Uncertainty = (Uncertainty / Measurement) × 100
Applying this to the given measurement:
Percent Uncertainty = (5 / 130) × 100 ≈ 3.85%
Therefore, the percent uncertainty in the measurement of an infant's pulse rate of 130 ± 5 beats/min is approximately 3.85%.