a b c d e f g h i j k l m n o p q r s t u v w x y z #

Categories starting with C

Items starting with C

Cortisol

Cortisol

Reference Range

Random cortisol

The reference range for cortisol (before 10am) is taken from the Alinity kit insert and is 102 – 535 nmol/L.

 

Short synacthen test

The current cut-off used for a short synacthen test (SST) is 450 nmol/L. This cut-off was derived from a paper in 2013 (El-Farhan et al1) which studied the response to synacthen in healthy volunteers in Gen 2 immunoassays vs GC-MS . This study included the Abbott Architect platform (uses the same assay formulation as the Alinity analysers) which showed good correlation of the Gen 2 assay to GC-MS.  The bias of immunoassays to GC-MS was overall positive. The 2.5th percentile of the geometric mean of post-ACTH stimulation cortisol concentrations for the Abbott assay were 430 nmol/L (Male) or 416 nmol/L (Female) compared to the cut-off of 420 nmol/L for a GC/MS method. It was therefore decided to keep the SST cut-off to 450 nmol/L.

(1El Farhan et al (2013). Method-specific serum cortisol responses to the adrenocorticotrophin test: comparison of gas chromatography-mass spectrometry and five automated immunoassays. Clin Endocrinol 78(5): 673.)

  • Turnaround Time: 1 day
Cortisol (Urine)

Cortisol (Urine)

Reference Range

24h urine: <130 nmol/24h

Random urine: <12.4 nmol/mmol

 

  • Turnaround Time: 1-2 weeks
Creatine Kinase (CK)

Creatine Kinase (CK)

Reference Range

Females         29 - 168 U/L

Males             30 - 200 U/L

CK levels are higher in males than in females, and in black race populations.  Exercise, muscle trauma (contact sports, traffic accidents, intramuscular injections, surgery, convulsions, wasp or bee stings, and burns), and drugs such as cholesterol-lowering statins can damage muscle and increase serum CK concentrations.

 

  • Turnaround Time: 1 day
Creatinine

Creatinine

Reference Range

Adult Male: 64-104 µmol/L

Adult Female: 49 - 90 µmol/L 

 

  • Turnaround Time: 1 day
Creatinine (Urine)

Creatinine (Urine)

Reference Range

Male:  9.0-18.0 mmol/24hrs

Female:  7.0-16.0 mmol/24hrs

 

  • Turnaround Time: 1 day

CSF Xanthochromia

Reference Range

An interpretive comment is provided by the laboratory based on the National Guidelines for Interpretation of CSF Spectrophotometry.

  • Turnaround Time: 4 hours
<<  1 2 [34 5 6  >>  

General Information

General information about the website and its content

Location of Laboratories

Where the laboratories are located and information about the services offered at each laboratory