Viapath Service Changes

The Viapath Biochemistry laboratory at Guy’s & St. Thomas’ will be moving to a new method for measuring HbA1c in Spring 2021 - the Roche turbidimetric inhibition immunoassay (TINIA).

The laboratory has performed a thorough investigation and have confirmed that the technology is appropriate for use in our local population. Reference ranges and interpretation of results will not change; however we will be reporting HbA1c in mmol/mol units only moving forward.

More information can be found by click the links to the relevant documents . These include: 

An introduction to the project, user letter 1
A Laboratory Pocket Guide to HbA1c analysis
A useful HbA1c unit conversion table 

A follow up communication , user letter 2

Urine creatinine is measured in Toxicology as part of the Urine Drug Screen to check for specimen validity, and is not used in any calculation of results.

Therefore, Toxicology will stop reporting the urine creatinine result, and replace with a text comment stating whether the urine sample is suitable for analysis.

Please click here for further information on the changes that will occur 

Last updated: 03/02/2021