Arista AH is a 100% plant-based absorbable surgical hemostatic powder derived from purified plant starch. The power of Arista AH lies in its microporous polysaccharide hemospheres, a patented blood clotting technology. Arista AH is indicated in surgical procedures (except neurologic and ophthalmic) as an adjunctive hemostatic device to assist when control of capillary, venous, and arteriolar bleeding by pressure, ligature, and other conventional procedures are ineffective or impractical. Proprietary MPH technology: A unique approach to achieving hemostasis. The power of Arista AH lies in its proprietary MPH (microporous polysaccharide hemospheres) technology. Consisting of microporous particles with a controlled pore size, the spheres are designed to act as a molecular sieve. The powerful osmotic action dehydrates and gels the blood on contact to accelerate the natural clotting process.