Skip to main content

LifeLabs New Combined Cytology and HPV Requisition

The erythrocyte sedimentation rate (ESR) is widely used as an indicator of inflammation. The traditional Westergren method measures the rate at which red cells sediment in plasma over one hour, and the results are influenced by the overall charge (or zeta potential) of the red cells. The net negative charge on red cells causes them to resist each other, while the net positive charge of serum proteins encourages adhesion causing a faster rate of sedimentation and therefore a higher ESR (i.e., during inflammation and often due to fibrinogen).
Although easy to perform and inexpensive, the Westergren method takes at least 30 minutes to perform in the laboratory. The method is imprecise and its specificity can be reduced by several factors unrelated to the inflammatory process, often making the results unreliable and imprecise.

LifeLabs recently introduced ESR testing by a new methodology that is faster and easier to perform. The new method analyzes the aggregation capacity (or zeta potential) of the red cells using optical density and has reduced analysis time to 20 seconds (more details available on request). Moreover, this new technology eliminates the interferences often encountered by Westergren method and has been proven in studies to better correlate with inflammation when compared to that method.
In April 2013, LifeLabs introduced this new methodology for ESR analysis. Reference interval changes were implemented at that time and interpretive message attached to all reports. This message will remain in the patient reports for 6 months.

Learn more details

For rush results (NAAT within 12 hours and PCR within 24 hours)

  1. Order your FlyClear test and receive your FlyClear test requisition
  2. Book an appointment at a LifeLabs location below.
    • Bring your printed FlyClear requisition and Passport
    • Select your ordered Province’s Rush Test to start booking:
    British Columbia

    6084 Russ Baker Way
    Richmond near Airport

    COVID-19 PCR (24h) / Rush 12h NAAT

    Ontario

    6084 Russ Baker Way
    Richmond near Airport

    COVID-19 PCR (24h)
    Rush 12h NAAT
    Rapid Antigen (2h)

Pre-Departure testing now available from the comfort of your home with MyVisit (Currently Greater Toronto Area only)

  1. Order your FlyClear test and receive your FlyClear test requisition.
  2. Book your Home Visit appointment with the MyVisit portal or, if your flight is within the next five days, contact a MyVisit coordinator 1-416-993-9579 (Monday – Friday, 9am-5pm EST)

MyVisit Pre-departure testing offers:

  • COVID-19 PCR/NAAT swab testing
  • COVID-19 Antibody Blood (serology) testing

The MyVisit fee is $80 per person.

Pre-Departure testing

Book your appointment online here. If your flight is within the next five days and you have received your FlyClear requisition, please contact a MyVisit coordinator 1-416-993-9579 (Monday – Friday, 9am-5pm EST).

Your health & safety is important to us

Please note that face masks are mandatory at all times at all of our locations to ensure the health and safety of all customers and employees.

Please inform staff if you are unable to wear a mask due to a medical condition. 

Thank you for your cooperation!