Osmolar gap


Calculated osmolarity = 2(Na+) + urea + glucose = 275-295 mosm/l

Osmolar gap = measured - calculated osmolarity. Normal ≤10


Causes of an increased osmolar gap are:


Content by Dr Ian Higginson, Dr Íomhar O' Sullivan.Published 07/01/2003. Reviewed by Dr ÍOS 24/04/2004, 24/04/205, 13/05/2007. Next review 13/05/2008.