This is an interesting question. We have stopped reporting a ref range
for measured calcium, and only report a reference range for 'corrected'
calcium; we have also validated our correction factor for our methods.
We phone all corrected calcium results >3 mmol/l; the clinicians seem
happy with this.
Cathryn Corns
Head of Biochemistry
Southend Hospital
01702 435555 ext 4058
-----Original Message-----
From: Myers Martin [mailto:[log in to unmask]]
Sent: 20 November 2003 09:55
To: [log in to unmask]
Subject: Re: Panic values for total calcium?
Alternative questions are:
should the panic ranges and reported reference ranges be the same for
corrected and non corrected calcium? should a reference range be quoted
for both or just one (but which one)? should we have an EQA scheme for
corrected calcium? (can we do a pilot
jonathan?)
regards
martin myers
-----Original Message-----
From: Dr. M. Steiner [mailto:[log in to unmask]]
Sent: 20 November 2003 07:48
To: [log in to unmask]
Subject: Panic values for total calcium?
Dear colleagues,
I would appreciate getting your opinion to help settle an ongoing debate
related to total calcium panic values. There are certainly two fractions
of requesting physicians. One would prefer only rather highly
pathological concentrations (< 1.7 and > 3.5
mmol/l) whereas the other one states that less pronounced changes should
also immediately be communicated (< 1.9 and > 3.0 mmol/l). I am fully
aware of the influence of low albumina on calcium in ICU patients and
know of the advantages of ionised calcium. Still, some agreement needs
to be achieved. Thank you very much for sharing your experience with us.
Dr. med. Michael Steiner
University of Rostock
Institute of Clinical Chemistry & Pathobiochemistry
D-18057 Rostock
GERMANY
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