We have not had a critical value for CK in the past but have just enlarged
our list of results to be phoned. We decided that there are a number of
types of results which do not need to be phoned for in-patients (because
they will be available on screen in the wards) but which should be notified
for nonhospital patients. Not so much because they require urgent action
(though some may), but because the consequences of not noticing them could
be bad in the medium to long term.
We set the CK limit at 5000 iu/l (rather arbitrarily) and the others in
this category are troponin T (0.1 mg/l), AST and ALT (1000 iu/l) and
creatinine 350 micromol/l.
Behind all this is the issue of how far the laboratory is responsible for
someone taking some action as a result of abnormal results. Obviously we
can't make the horses drink, but maybe we should lead them to the water and
point out that it's there.
John Whitfield
Clinical Biochemistry
Royal Prince Alfred Hospital
Sydney, Australia
Phone (+61) 2 9515 5246
Fax (+61) 2 9515 7931
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-----Original Message-----
From: Qing Meng [SMTP:[log in to unmask]]
Sent: Tuesday, 9 April 2002 4:01
To: [log in to unmask]
Subject: CK critical value
Hi everyone,
Sorry to bother you again. For the first time I forgot to put a Subject
title which may confused you. We are trying to set up critical value for CK
in the Lab but not much information available in publication. I wonder if
you have the CK critical value in your Lab. Any information would be
appreciated.
Thanks,
Qing H. Meng MD&PhD
Clinical Chemistry
Hamilton Regional Laboratory Medicine Program
Canada
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