Table 4.

Consistency check calculations and rule definition.

Number	Test	Calculation/Logic
1	BUN/Creat ratio	BUN/Creat ratio = Urea/(Creatinine/1000) (Information rule only)
2	AG	AG = Sodium - Chloride - Total CO2 (Information rule only)
3	DB/TB ratio	DB/TB ratio = Direct Bilirubin/Total Bilirubin (> 1 will flag)
4	A/P ratio	A/P ratio = Albumin/Total Protein (beyond 0.25 or 1 will flag)
5	Transam ratio	Transam ratio = ALT/AST (beyond 0.25 or 4 will flag)
6	T4 high rule	Both TSH and fT4 greater than upper reference limit
7	T4 low rule	Both TSH and fT4 less than lower reference limit
8	HIL all positive	All indices (H, I, L) of one plus or greater.
9	H-L flag 1	hemolysis is ≥ 2+ and lipemia flag is ≥ 1+
10	H-L flag 2	hemolysis is 4+ and lipemia flag is ≥ 1+
11	Icterror	Ictchk1 = Total bilirubin - "I index as concentration" (> 65 will flag)
12	ContSamp1	Sodium < 130, Chloride < 100, Potassium > 5.5
13	ContSamp2	Sodium < 131, Chloride < 105, Potassium < 4.1 (Reflex glucose > 20 mmol/L)
14	ContSamp3	Sodium < 132, Chloride < 103, Potassium < 4.1. Glucose > 18
15	ContSamp4	Sodium < 126, Chloride < 105, Potassium < 3.8
16	Ivglu	Sodium < 136,Chloride < 98, Potassium > 5.5, Glucose > 6.0
17	IVglu2	Negative delta for sodium and chloride and positive delta for glucose and potassium
18	IVsalinecont1	Sodium > 160, Chloride > 110, Potassium < 3.5, glucose < 3.3
19	Ivsalinecont2	Positive delta for Sodium and Chloride and negative delta for glucose and potassium
20	EDTA Check	Potassium > 7 and (Calcium < 2, or ALP < 50, or Magnesium < 0.5)
21	Tchol-HDL	Tchol-HDL = HDL/Chol (>0.75 will flag)
22	Delay Check	Glucose < 2.21,Potassium > 6, hemolysis index < 50 or negative
23	Fibrin Check	Sodium< 136, Potassium < 3.5, Calcium < 2.1, Glucose < 3.9 (and negative deltas)
24	Mixup1	Delta calculation (((Current Creat -Past Creat)/Past Creat)/days)*100% (beyond − 50% or + 50% will flag)
25	Mixup2	Delta calculation ((Current Creat -Past Creat)/Past Creat)*100% (beyond 50% will flag)
26	AGLow	Anion Gap < 1