David has an ultrasound of his common carotid arteries, which shows that his right common carotid artery is nearly 90 percent blocked. he wonders how the right side of his brain is getting enough blood if this artery is so occluded. what do you tell him?

Anurse on a medical unit is administering heparin by continuous iv infusion to a client who has a pulmonary embolism. the client’s most recent aptt is 70 seconds. which of the following actions should the nurse take? a. increase the iv infusion rate. b. decrease the iv infusion rate. c. discontinue the iv infusion. d. continue the iv infusion.