An ICU patient's blood pressure is being continuously monitored via an arterial catheter in the left radial artery. The respiratory therapist places the patient in Trendelenburg position for bronchial hygiene therapy and the blood pressure monitor begins to alarm. When the patient is returned to the original position, the blood pressure normalizes. What is the most likely reason for the variation in blood pressure?
A. Trendelenburg position causes an elevation in blood pressure.
B. The tip of the catheter was below the transducer.
C. The catheter needed flushing.
D. The catheter was kinked.
Answer: B. The tip of the catheter was below the transducer.
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