Step I osmolality

[ctizzle13498]

Ok so when talking about DI or SIADH, what exactly is osmolality? What about osmolarity? I keep getting these two confused. I thought that concentration equals osmolality. If that's true, what is osmolarity?

 

[Saragam]

Ok so when talking about DI or SIADH, what exactly is osmolality? What about osmolarity? I keep getting these two confused. I thought that concentration equals osmolality. If that's true, what is osmolarity?

http://docs.google.com/viewer?a=v&q...2RM8A4&sig=AHIEtbRGOymsM5aex16_4qvD6j_rdLegPw


http://www-users.med.cornell.edu/~spon/picu/calc/osmolal.htm

http://www.medscape.com/viewarticle/461379

 

[notarealname]

Ok so when talking about DI or SIADH, what exactly is osmolality? What about osmolarity? I keep getting these two confused. I thought that concentration equals osmolality. If that's true, what is osmolarity?

Review your MCAT?

Osmolarity = osmoles/volume of solvent
Osmolality = osmoles/ Kg of solvent