Reference ranges for blood tests are sets of values used by a health professional to interpret a set of medical test results from blood samples.
It is a set of values that includes upper and lower limits of a lab test based on a group of otherwise healthy people.
The values in between those limits may depend on such factors as age, sex, and specimen type (blood, urine, spinal fluid, etc.)
Values within the reference range (WRR) are those within normal limits (WNL). The limits are called the upper reference limit (URL) or upper limit of normal (ULN) and the lower reference limit (LRL) or lower limit of normal (LLN).
The following are the lower limit of normal (LLN) and upper limit of normal (ULN) for different laboratory parameters extending from pages 1 – 13. All laboratory parameters are represented in this post, so ensure you go through all the pages to find the reference range of your interest.
Electrolytes LLN ULN Comments
Ammonia 15 50 µmol/L
Ceruloplasmin 15 60 mg/dL
Chloride 95 105 mmol/L
Copper 70 150 µg/dL