The cell debris is for some the easiest test to do and was for me the last test I fully understood. Let’s not get into the test too much, but let’s talk about what we test: We look for the number of visible debris particles in one litre of urine. .04M would be the perfect number IF EVERYTHING ELSE IS PERFECT. If not we would like it to be around 4M, if the UREA's are not high. That means 4 million particles! If you know you can only see about one in every 20.000 that still means 100 visible particles per litre. If your sample is 0.1 litre that means 10 visible particles in the specimen. For now there is no need to get in to that more, but keep in mind that it is understandable and logical.
While we call it cell debris, others call it albumin. According to most chemists, that basically means water soluble protein that is moderately soluble in concentrated salt solutions, and experiences heat denaturation. Confused? Then let's just keep it at Cell Debris shall we?