Introduction

This is episode 17 of Harrison's Pod class, where we discuss important concepts in internal medicine. The question reads, a 53-year-old man is sent to you for evaluation of an elevated hematocrit found incidentally unlapped testing. He was removing drywall in a house and cut his upper arm. A CBC before his arm was stitched revealed a hematocritic of 59% and hemoglobin of 20 grams per deciliter.