Help with Lab results

I was trying (ie struggling) with my Functional Health Patterns and I wanted a book or quick reference that allowed me to get an idea of what a high CBC values or BUN or Creatinine would mean in the long run to the patient. I can figure out what the lab result is within range but that doesn't really tell me what exactly that tests for and what the number might mean for the patient. I guess in a round about way I need Lab tests for dummies or something along that line.

Thank you so very much! As you can tell I am suffering from a huge lack of sleep by reading my first post. I am in my first month of clinicals and I am feeling so out of sorts. I will check a med surg book that I got at a yard sale and see if it is in there, if not I will get the Mosby book you recommended. Thanks so much!

Daytonite thank you for the web sites, they will come in super handy. You guys are the BEST!!