Extras · 1 of 4

A typical shift

Eight or 12 hours in a lab most patients never see. Blood samples arrive by tube system. You load analyzers, check quality control, review every result the machine flags, and phone a nurse when a potassium level is dangerous. At 3 a.m. you might crossmatch six units of blood for a trauma in the emergency department, then go back to reading bacteria plates. It is quiet, focused work with sudden bursts of urgency.