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.
PT refers to prothrombin time, a type of blood test that measures a personâs blood clotting time. There are various ways to test PT and because of the differences of testing methods used by laboratories, INR or international normalized ratio is used to standardize the PT test results.T refers to prothrombin time, a type of blood test that measures a personâs blood clotting time. There are various ways to test PT and because of the differences of testing methods used by laboratories, INR or international normalized ratio is used to standardize the PT test results.