How Long Can a Pt Inr Sit

PT INRORDERING INFORMATION:Geisinger Epic Procedure Code: LAB2946 Geisinger Epic ID: 14539Specimen stability:Whole blood: 24 hours at room temperature. Plasma: -20°C for 30 days, -70°C for 6 months.

How long is a PT sample good for?

Specimens are stable at room temperature for 24 hours. If testing cannot be completed within 24 hours, specimens should be centrifuged for at least 10 minutes at 1500xg.

What causes inaccurate PT INR results?

Chronic inflammatory conditions (eg, rheumatoid arthritis, Crohn’s disease, ulcerative colitis, infectious liver diseases such as hepatitis, or inflammatory kidney diseases such as diabetic nephropathy and glomerulonephritis). Severe infection (eg, sepsis) Chronically elevated fibrinogen for any reason.