Hi all
We are happy with the change since we have been complaining about a
positive bias for more than a year! Our EQA (weqas and neqas)
performance is now much improved and our patient mean is back to
pre-Roche Modular days. We have a strict policy of calibrating according
to Roche instructions, or, if forced to consider an alternative
approach, not reporting to the modular group eg for total protein we now
use a different suppliers calibrator and report to the general biuret
group. I feel this is the only approach which will tease out poor
standard traceability or inconsistent manufacturing practice and call
suppliers to account over what appears to be considerable differences in
experience between laboratories and or instruments.
Peter Auld
-----Original Message-----
From: Clinical biochemistry discussion list
[mailto:[log in to unmask]] On Behalf Of Wills Philip
(Queen Elizabeth Hospital NHS Trust)
Sent: 28 March 2006 10:11
To: [log in to unmask]
Subject: Calciums
Can anyone say where we are with the Roche Calcium
calibration change of 'Cfas' by -6.3%? Do we put up with EQA
returns of +1.5 to +2.0 SDI, or make the change and end up
with a bunch of hypocalcaemics? (Or alternatively change our
refernce range).Has anyone made the change and been happy
with the resultant patient means? I'd love to hear from
anyone who is still unhappy with this situation.
Phil Wills QEH Woolwich.
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