Hemochron Instrument to Instrument Comparison

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Hello all! I'm new to this platform and still learning how to navigate the website. My question is, we have the hemochron sig elites and I know it differs from hospital to hospital, but I was wondering how much is the difference being determined at your facilities? Are you guys using % differences? Or determining the mean? Or using any other method of determining pass/fail?
Any information would help thank you!

7 Replies

Gloria MacLean

Mon Jul 28, 2025 at 8:32AM

If you are asking about total allowable error for ACT, we use 20%.
20% is also listed on the Data Innovations page:

Nora Hab

Mon Jul 28, 2025 at 11:32AM

Appreciate it!

Miranda Cotter

Mon Jul 28, 2025 at 12:06PM

We use Hemochron for INR testing. Here's our allowable tolerance:
Absolute Difference for INR <2.0 = ±0.4
% Error =±20.0%
Mean INR >2.0 = ±0.4 INR
Mean INR >3.0 = ±0.8 INR
Mean INR >4.0 = ±1.2 INR

Christin Maurer

Mon Jul 28, 2025 at 12:21PM

We use ACT on our Sig Elites with a 20% TAE, same as Gloria.

Nora Hab

Mon Jul 28, 2025 at 1:48PM

Thank you all for your help!

Melva Anderson

Mon Jul 28, 2025 at 3:04PM

I need a link to some reference material for the 20%. besides data innovations. I appreciate any help.

Christin Maurer

Mon Jul 28, 2025 at 3:21PM

AAB | American Association of Bioanalysts

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Hemochron Instrument to Instrument Comparison