A premature infant has two pulse oximeters placed: one on the right hand and one on the left foot. The respiratory therapist notes that the reading on the right hand is consistently 12% greater than the reading on the left foot. Which of the following is the best interpretation of this finding?

Question

Quizplus · Accepted Answer

For the newborn in respiratory distress, pulse oximetry is often used to monitor both the preductal SpO₂ and the postductal SpO₂. To measure the preductal SpO₂, the oximeter probe is placed on the right hand or wrist; to measure the postductal SpO₂, the probe is placed on either foot. A large difference between the two readings (>10%) indicates a right-to-left shunt, and persistent pulmonary hypertension of the newborn (PPHN) is likely.

A Premature Infant Has Two Pulse Oximeters Placed: One on the Right