For the purpose of assessing right-to-left shunting,as in the case of persistent pulmonary hypertension,which of the following sites would render postductal blood?
I.Right arm
II.Left arm
III.Right leg
IV.Left leg

Question

Quizplus · Accepted Answer

In addition,placing pulse oximeters on preductal and postductal sites allows for assessing right-to-left ductal level shunting,as seen with persistent pulmonary hypertension of the newborn.In this case the right arm,or preductal site,will have a higher saturation,while the postductal site,or left arm and lower extremities,will have a lower saturation due to venous admixture occurring postductally.

For the Purpose of Assessing Right-To-Left Shunting,as in the Case