Four tests open in Cardiac markers. They are easy to book on the wrong sample, so the sample line is worth reading at the counter.
- Troponin I opens at ₹1,500, serum or plasma, cut-off text under 0.04 ng/mL. The same text says the cut-off varies with the assay. A high-sensitivity kit will not match 0.04. Change the range to the insert in the kit the laboratory actually runs.
- CK-MB opens at ₹600, serum, under 5.0 ng/mL, and the note says this is a mass assay.
- BNP / NT-proBNP opens at ₹2,200. The sample is EDTA plasma, not a plain serum tube. The row is NT-proBNP. Under 75 years the opening cut-off is 125 pg/mL. From 75 it is 450.
- hs-CRP opens at ₹550, serum. The sentence on the row names bands under 1, 1 to 3, and above 3 mg/L. The numeric flag range opens at 0 to 3, so a value above 3 is marked.
Ordinary CRP is not this test. CRP and a second quantitative CRP row live in Immunology, with a cut-off under 5 mg/L. Booking hs-CRP when the doctor wrote CRP, or the other way around, is a catalogue choice the counter has to get right. The names are different on purpose.