View updated information about our visitor policy  »
Book an appointment at our COVID-19 Assessment Centre (new location) »

Hospital  >  Departments  >  Laboratory Medicine  >  Laboratory Medicine Bulletins

Newsletters & Publications

Urinary Citric Acid no longer performed on site - July 28, 2014

Effective Monday, August 4th, all 24 hour urine Citric Acid requests will be referred out for testing via Hospitals In-Common Laboratory Inc.
• There are no changes to specimen requirements or Reference Range.
• Turn-around-time: 10 days
Please note that random urine testing is no longer available.

July 28, 2014


Discontinuation of CK-MB testing - April 15, 2014

The 2012 Third Universal Definition of Myocardial Infarction identifies troponin as the preferred biomarker for the diagnosis of myocardial infarction, including MI post-CABG, post-stenting etc. CK-MB is the alternative only if troponin is not available. Troponin has been available at Sunnybrook for over a decade. We will therefore stop CK-MB testing on April 24, 2014.

April 16, 2014


Free Triiodothyronine (Free T3) Reference Interval Update - March 28, 2014

Due to a recent change in reagent formulation, the reference interval for free triiodothyronine (free T3) will be revised as follows, effective April 3, 2014: Free T3 (adult): 3.1 - 6.8 pmol/L

The above reference interval represents the 2.5th and 97.5th percentiles of over 5 thousand healthy adults, and has been verified with 20 local volunteers.

March 31, 2014


Chromogranin A Specimen Requirement Changes - August 15, 2013

Please be advised that effective immediately the specimen type for Chromogranin A testing has changed from serum to EDTA plasma. Serum will no longer be accepted.

August 19, 2013


ALERT: Discontinuation of Serum Folate and RBC Folate at SHSC - April 12, 2013

EFFECTIVE April 18, 2013
Clinically significant folate deficiency has all but disappeared and biochemical deficiency is rare. In the last 12 months at Sunnybrook, only one serum folate fell into the deficiency range, out of 523 samples tested. For 3722 RBC folate samples, none were clinically deficient, and less than 1% (22 samples out of 3722) were in the indeterminate range (550 to 893 nmol/L).

April 12, 2013