Source:http://linkedlifedata.com/resource/umls/id/C0206056
MSH: A technique for measuring extracellular concentrations of substances in tissues, usually in vivo, by means of a small probe equipped with a semipermeable membrane. Substances may also be introduced into the extracellular space through the membrane.,CSP: technique which provides continuous direct concentration measurements of substances in the interstitial space of a tissue or organ without changing the tissue structure and metabolism.