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.
Activated Partial Thromboplastin Time (APTT) Test. The activated partial thromboplastin time (APTT) and the partial thromboplastin time (PTT) tests are very similar in nature and are used to test the amount of time taken by blood to clot in a patient being treated with blood-thinning medicines, especially heparin.ctivated Partial Thromboplastin Time (APTT) Test. The activated partial thromboplastin time (APTT) and the partial thromboplastin time (PTT) tests are very similar in nature and are used to test the amount of time taken by blood to clot in a patient being treated with blood-thinning medicines, especially heparin.