Effective Dec. 3, 2025 at 1430 hours

Background Information: Defining critical values requires a careful balancing act. In consultation with Clinical Hematology and the Transfusion Medicine Laboratory discipline, critical values for White blood cell count (WBC), Hemoglobin (HGB), and Platelet (PLT) have been revised to reflect clinical demand and patient population as well as overall provincial standardization.

Clinical Practice Change:

• Access the updates to WBC, Hemoglobin, PLT critical values
• All other hemotological critical values remain unchanged

System Improvements:

• To reduce the volume of phone calls between labs and ordering physicians, easing fatigue at both ends without compromising patient care.

Access a printable file.

Submitted by: Tamara Burnham, Collaborative Practice Lead