The Terminology- SNOMED CTÂ®, an Evolving Clinical Reference Terminology. SNOMEDÂ® is the Systemized Nomenclature of Medicine. It is a controlled medical terminology (CMT). At its simplest, a SNOMED is a coded vocabulary of medical concepts and expressions used in healthcare.
The partial thromboplastin time (PTT) is a screening test that helps evaluate a person's ability to appropriately form blood clots. It measures the number of seconds it takes for a clot to form in a person's sample of blood after substances (reagents) are added.
TPMT. TPMT, also known as Thiopurine S-methyltransferase, is an enzyme that determines the level of 6-MMP as well as 6- TGN which are metabolites that are responsible for the potential toxicity and therapeutic aspect of thiopurine medications such as 6-MP, Azathioprine, and Imuran. [2] Thus, it is imperative that blood counts be regular tested when taking thiopurine drugs. 2  Use of thiopurines will affect the results of TPMT enzyme testing. 3  The test should be conducted PRIOR to commencing use of the drug.