Critical Limits

Critical limits are separate from ordinary reference ranges and drive the critical result notification workflow.

6 configured limits

Test	Parameter	Critical Low	Critical High	Condition	Unit	Action	Status
Complete Blood Count	Hemoglobin	7.0	20.0	—	g/dL	Notify ordering doctor within 30 minutes	Active
Complete Blood Count	Platelet Count	50,000	1,000,000	—	/cmm	Notify ordering doctor immediately	Active
Complete Blood Count	Total WBC Count	2,000	30,000	—	/cmm	Notify ordering doctor	Active
Serum Creatinine	Serum Creatinine	—	5.0	—	mg/dL	Notify ordering doctor	Active
Blood Glucose (Fasting)	Fasting Blood Glucose	45	450	—	mg/dL	Notify ordering doctor immediately	Active
Urine Culture & Sensitivity	Culture Result	—	—	Blood culture positive / multi-drug resistant isolate	—	Notify ordering doctor immediately	Active

How critical results behave

1. Result entry marks the value CRITICAL in text and flag, not colour alone.
2. Pathologist review shows the critical parameter with the existing Notification Required control.
3. The existing lifecycle continues: Notification Required → Pending → Doctor Notified → Acknowledged.

Reference range ≠ critical limit

A Low or High flag reports a value outside the normal range. A critical limit means a clinically dangerous value that requires active communication with the ordering doctor.