Fever is a number that means different things at 34 and at 84, and a white count of 2,800 in an ill patient is worse news than 18,000. Move the dials on the left and watch the bench compute the absolute neutrophil count, apply the right fever threshold for this patient, and raise the neutropenic-fever alarm when it is earned. Then switch benches and collect every specimen the way the laboratory needs it.
Who is in the bed
Temperature
Measured now37.0 °C98.6 °F
34.0 °C — 40.5 °C
This patient’s own baseline36.8 °C
A rise of 1.1 °C (2 °F) over their own baseline counts as fever in the older adult
Complete blood count with differential
White blood cells8,000/mm³
Reference 4,500–11,000/mm³
Segmented neutrophils62%
Reference 55–70 percent
Bands (immature forms)3%
Reference under 5 percent — over 10 percent is a left shift
Inflammatory and perfusion markers
C-reactive protein4mg/L
Reference under 10 mg/L (under 1 mg/dL); rises within 6–8 hours
Procalcitonin0.10ng/mL
Under 0.25 ng/mL low; over 0.5 ng/mL supports bacterial sepsis