Table 2.

Effect of hCGβcf added to hCG-positive urine with an hCG concentration of 17 800 IU/L (Siemens Centaur) on the results of the OSOM (Genzyme Diagnostics), ICON 25 (Beckman Coulter), and hCG Combo (Cardinal Health) devices.

Final hCGβcf concentration, pmol/LOSOMICON 25hCG Combo
63 000PositivePositive
125 000PositivePositive
250 000Faint positivePositive
500 000Negative/faint positiveFaint positivePositive
1 000 000NegativeNegative/faint positivePositive