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.
A partial thromboplastin time (PTT) test helps doctors assess your bodyâs ability to form blood clots. Each time you bleed, it triggers a series of reactions known as the âcoagulation cascade.â Coagulation is the process your body uses to stop blood loss. Cells called platelets create a plug to cover the damaged tissue and then your bodyâs 13 clotting factors interact to produce a blood clot.