An instrument used to measure blood vessels, including their diameter, flow rate, or other properties.
From Greek 'angeion' (vessel) + 'metron' (measure). This medical instrument term emerged with advances in vascular physiology and diagnostic technology.
Modern angiometers have evolved into sophisticated devices—ultrasound machines and CT scanners can now measure vessel diameter and blood flow in real-time, helping doctors detect stenosis (narrowing) before it causes a heart attack or stroke.
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