I'm rather disappointed. I was working under the assumption that testing with the ProTime meter - although not as easy to do as with the InRatio or CoaguChek XS, would give values that are closer to lab values than the other meters.
After having a TIA (aka STROKE) in April, partly because I trusted my meter to be accurate and didn't know that a 2.7, in some cases, meant 1.7, I decided to try testing with the ProTime meter, which uses a different method of determining prothrombin times.
My experience with parallel testing - ProTime, InRatio, and sometimes, Lab, provided results on the ProTime that were below labs and far below InRatio. After having multiple tests on the ProTime give very low results when compared to the lab, I contacted ITC, the manufacturer of the ProTime meter and strips (they call them Cuvettes). They didn't seem interested - or concerned - and it seemed as if my report of inaccuracy fell on deaf ears.
I don't recall them asking for a lot number, and they certainly didn't suggest that they replace my possibly erroneous cuvettes.
Today, I learned from the distributor who sold me the cuvettes that ITC issued a recall order on these cuvettes - dated nearly a month ago. Certainly, the potential harm that results from adjusting dosage for an INR that is LOWER than labs would have less negative impact than one that reports HIGHER than labs (as I can say from personal experience with the InRatio), but it would have been better if ITC seemed to care about my report, and if I would have been notified of the recall a few weeks earlier than today.
If ANY of you are using ProTime cuvettes - check with your source or ITC and make sure that your strips aren't in the possibly erroneous lot(s).
After having a TIA (aka STROKE) in April, partly because I trusted my meter to be accurate and didn't know that a 2.7, in some cases, meant 1.7, I decided to try testing with the ProTime meter, which uses a different method of determining prothrombin times.
My experience with parallel testing - ProTime, InRatio, and sometimes, Lab, provided results on the ProTime that were below labs and far below InRatio. After having multiple tests on the ProTime give very low results when compared to the lab, I contacted ITC, the manufacturer of the ProTime meter and strips (they call them Cuvettes). They didn't seem interested - or concerned - and it seemed as if my report of inaccuracy fell on deaf ears.
I don't recall them asking for a lot number, and they certainly didn't suggest that they replace my possibly erroneous cuvettes.
Today, I learned from the distributor who sold me the cuvettes that ITC issued a recall order on these cuvettes - dated nearly a month ago. Certainly, the potential harm that results from adjusting dosage for an INR that is LOWER than labs would have less negative impact than one that reports HIGHER than labs (as I can say from personal experience with the InRatio), but it would have been better if ITC seemed to care about my report, and if I would have been notified of the recall a few weeks earlier than today.
If ANY of you are using ProTime cuvettes - check with your source or ITC and make sure that your strips aren't in the possibly erroneous lot(s).