Items starting with C

0.14-0.54 g/L

(Source: SAS Trace Element Update, 2018)

Before 10 am: 101.2 - 535.7 nmol/L,

After 5 pm: 79 - 477.8 nmol/L,

(Source: Abbott Diagnostics)

Urine cotinine concentrations below 50 ng/mL have been reported to reflect abstinence from tobacco for 2 or more weeks.

For further information please contact the laboratory

Serum creatinine:

64 - 104 µmol/L (Male)

49 - 90 µmol/L (Female)

(Source : Abbott Diagnostics)

Laboratory practice is that eGFR using the 4 variable MDRD equation is applied to males with a creatinine of >111 µmol/L and females with a creatinine >98 µmol/L.

As individuals age they usually lose muscle mass which means that if their renal function remains unaffected creatine concentration in serum should fall as we age. Conventional population based reference intervals have not usually been age stratified. The impact of this is that individuals can have creatinine concentrations within the conventional population reference range while having significant renal impairment.

Note

From Monday 10th September 2018 creatinine will be measured using the enzymatic creatinine method.

For further information on how this will effect your results please refer to:

http://www.heftpathology.com/alphaindex/downloads/n.html

Enzymatic creatinine is currently not a UKAS accredited test. It will be assessed in October 2018.