There is no doubt that the SI unit for time is t
Dear Colleagues,
There is no doubt that the SI unit for time is the second. However a primary consideration of the choice of units is the avoidance of errors by seeking uniformity. To this end the Australian Creatinine Consensus group recommended in 2005 (Med J Aust) that mL/min be used for GFR and creatinine clearance. This was based on review of all commonly used sources of information available to us (see below) and we felt the need for uniformity was greater than the need for SI compliance.
Information sources using mL/min for GFR or creatinine clearance
European Nephrology Guidelines (EBPG)
UK Guidelines (The Renal Association)
US Guidelines (KDOQI)
Australian Guidelines (CARI)
Canada (CSN) appear to use both
Tim’s Local Nephrology Survey: 13/14 use mL/min
Cancer Council of NSW Guidelines
Australian Medicines Handbook
Australian Therapeutic Guidelines
MIMS
At our hospital we had reported in mL/s for at least 10 years but every time I heard it discussed or presented by resident staff it was converted to mL/min. I note from the previous post that we have not achieved full standardisation across the country (yet?)
Additionally at least in Australia there are many non-SI units used in routine pathology that are uniformly used and not under consideration for change (eg U/L for enzymes, mmHg for partial pressure of gases).
This does not answer the question about beta 2 microglobulin but if the test was to be brought into routine use it would be important that a consensus is reached about the units to use.
Regards,
Graham
Graham Jones
Staff Specialist in Chemical Pathology
St Vincent's Hospital, Sydney
Ph: (02) 8382-9160
Fax: (02) 8382-2489
>>> Greg Watts <[log in to unmask]> 10/11/07 10:14 am >>>
In response to Herbert's question,
We have reported Creatinine clearances in SI units (ml/s) for the last 10 yrs. We don't do B2m clearances, but if we did I assume we would use the same units.
Just as an aside I am impressed with the number of decimal places Roger is happy with in his reference range ;)
Regards,
Greg Watts (M.Sc. M.A.)
Deputy Director - Pathology
Sydney Adventist Hospital
[log in to unmask]
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