1520s, from Latin perfusus, past participle of perfundere "to pour over, besprinkle," from per- + fundere (see found (v.2)).
perfuse per·fuse (pər-fyōōz')
v. per·fused, per·fus·ing, per·fus·es
To pour or diffuse a liquid over or through something.
To force blood or other fluid to flow from the artery through the vascular bed of a tissue or to flow through the lumen of a hollow structure.