How does Arista AH achieve hemostasis?

• A. The product dissolves blood clots and then re-clots using a chemical catalyst.
• B. It provides a mechanical barrier that physically blocks bleeding.
• C. It binds to calcium and prevents clot formation.
• D. MPH particles act as a molecular sieve, concentrating serum proteins, platelets, and red blood cells to form a strong fibrin clot.

Answer: (D)

Arista AH works by using microporous polysaccharide spheres that act as a molecular sieve. When applied to a bleeding surface, these particles rapidly absorb plasma fluid, which concentrates serum proteins, platelets, and red blood cells at the site. This local concentration speeds up the natural coagulation process and promotes the formation of a firm fibrin clot, helping to stop the bleed. It’s not about dissolving clots with a catalyst, binding calcium to stop coagulation, or serving only as a physical barrier; the key is concentrating the clotting elements to accelerate clot formation.