Capillary refill time (CRT) is the duration required for color to return to a peripheral capillary bed after applying pressure to induce blanching. This assessment is typically performed on the nail bed or skin and is indicative of peripheral perfusion. Not to be confused with pulse oximetry, CRT is a rapid evaluation tool utilized in triage situations, such as during START assessments, to gauge circulatory status and potential shock in patients. In EMS contexts, it is commonly framed alongside structured communication and triage concepts such as START (Simple Triage and Rapid Treatment) or SALT (Sort, Assess, Lifesaving interventions, Treatment/Transport) as shared terminology.
Category context: Patient care, assessment, interventions, triage, and EMS system terms commonly used by firefighter/medics.