An instrument that automatically records blood properties, such as blood pressure, flow, or composition over time.
From Greek haima (blood) + autos (self) + graphos (write). This medical device term describes machines that continuously record and display blood-related measurements without manual observation.
Hemautographs were the grandfathers of today's cardiac monitors and blood pressure cuffs—19th-century doctors created these clever mechanical devices to watch their patients' blood continuously, which was revolutionary at the time!
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