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External quality control for Reference Laboratories
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RELA - IFCC External Quality assessment scheme for Reference Laboratories in Laboratory Medicine

This site gives you all the information you will need for participating in the RELA scheme.

Time schedule for RELA 2023

Announcement: October 24th, 2022
Deadline for ordering: November 11th, 2022
Shipment of samples: December 2022
Deadline for transmission of results: August 15th, 2023
Reporting results to participants: September 4th, 2023
Publishing results on this website: September 31th, 2023

Please refer to the navigation area on the left to (for instructions see our new RELA web manual)
- register or log in
- order the survey
- entering your results
- get the evaluation of past surveys
The whole RELA process is described in detail in the IFCC-RELA-EQAS procedure manual.

Offered measurands:
Metabolites and substrates (META): total cholesterol, total glycerol, creatinine, uric acid, urea, glucose, total bilirubine
Electrolytes (ELEC): sodium, potassium, chloride, calcium, lithium, magnesium
Enzymes (ENZY): ALT, AP, AST, CK, LDH, GGT, amylase
Glycated hemoglobins (GLYC): HbA1c
Proteins (PROT): total protein
Hormones (HORM): aldosterone, cortisol, progesterone, testosterone, estradiol-17ß, estriol, 17-OH-progesterone
Thyroid hormones (THYR): total thyroxine (TT4), total tri-iodthyronine (TT3)
Therapeutic drugs (THER): digoxin, digitoxin, theophylline
Vitamins (VITA): 25-OH-vitamin D3
Hemoglobin (HEMO): total hemoglobin

© 2021 W.J. Geilenkeuser, RfB