Please inform me when you have collated responses.
 
Kind regards,
 
Bart Ballieux

 B.E.P.B. Ballieux PhD
Clinical Biochemist Endocrinology
CKCL, E2-P
Leiden University Medical Centre
P.O.box 9600
2300RC  Leiden
Tel: +3171-5262165
Fax: +3171-5266753
email: [log in to unmask]
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From: Clinical biochemistry discussion list [mailto:[log in to unmask]] On Behalf Of Wiedemann Larisa (RF4) BHR Hospitals
Sent: donderdag 9 februari 2012 16:22
To: [log in to unmask]
Subject: Urine calcium to creatinine clearance - reference ranges

Hi all,
 
When measuring calcium to creatinine clearance ratio (fractional calcium excretion index) in 24 hour urine, we have used the following reference range:
 
<0.010 indicated FHH (familial hypocalciuric hypercalcaemia)
>0.03 indicated PHP (primary hyperparathyroidism)
 
Whilst I'm able to find multiple references to the "<0.01 indicates FHH" range, I'm struggling to locate the original source of the >0.03 cut off for PHP.
 
Could anyone help with establishing when/how this was determined?
Does anyone use anything different?
 
 
I'll be happy to collate responses and forward to those interested.
 
Many thanks in advance,
 
Larisa
 
 
 
 
 
 
Larisa Wiedemann
 
Pre-reg Clinical Scientist
Biochemistry Department
Queen's Hospital, Romford
Essex, RM7 0AG
Tel: 01708 435 506
Fax: 01708 503 735
DECT: 6194
 
 
Barking, Havering & Redbridge University Hospitals NHS Trust: Most Innovative Trust in London 2009


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