How is Arista AH used in laparoscopic or robotic surgery?

• A. Applied dry to the bleeding surface with long applicators through ports; keep the field dry and avoid suctioning powder into ports.
• B. Applied wet to the bleeding surface with short applicators; keep the field wet.
• C. Injected into the bloodstream.
• D. Sprayed from a syringe onto the bleeding surface.

Answer: (A)

Arista AH is a dry, absorbable hemostatic powder used to control oozing on bleeding surfaces during laparoscopic or robotic surgery. It is applied directly to the bleeding site with long applicators inserted through the ports, while the field is kept dry. The dryness is crucial because moisture causes the powder to clump and prevents it from adhering effectively, reducing its ability to promote coagulation. The powder works by absorbing fluid at the bleeding surface, concentrating clotting factors locally and accelerating clot formation. Avoid suctioning powder into the ports, as this can clog instrument channels and waste the product; moisture or alternative delivery methods like spraying or injecting are not how Arista AH is designed to be used, and would diminish its effectiveness.