The ionic composition of interstitial and intravascular fluids is the same. Proteins, however, are kept with the vascular compartment, at least to a degree, by the vascular wall, which is a semi-permeable membrane. The concentration of proteins is much higher in the plasma sector than in the interstitial sector.
Detection of marijuana using swab drug test can vary from person to person taking into account the different conditions like general health, different fluid intake, metabolism, etc.
How to pass mouth swab test. Discussion in 'Blood, Hair & Saliva Testing' started by robc71, Jan 3, 2008. My husband has smoked marijuana daily for years. He quits for about a month before a urine test and has always passed along with using SureGel.