A specialized surgical knife or instrument designed specifically for cutting into or making incisions in arteries during vascular procedures.
From Latin 'arteria' (artery) + Greek '-tome' (cutting instrument). Medical instruments often use this '-tome' suffix (like 'scalpel'), and this term describes a precision tool for arterial surgery.
Arteriotomes had to be extraordinarily sharp and precisely designed because arteries are muscular tubes that bleed catastrophically when cut—surgeons needed instruments that could make clean, swift incisions to minimize blood loss.
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