Hemostatic Benefits of an Absorbable Polysaccharide Powder in Redo Cardiac Surgery: A Comparative Study

Area of Science:

• Cardiovascular Surgery
• Surgical Hemostasis
• Biomaterials

Background:

• Post-operative bleeding complicates redo cardiac surgery, increasing transfusion needs and reoperation risks.
• Planned non-emergent redo cardiac surgery presents an opportunity to evaluate hemostatic agents.
• No prior direct comparisons exist for absorbable polysaccharide powder versus no hemostatic agent in this specific surgical context.

Purpose of the Study:

• To directly compare the efficacy of an absorbable polysaccharide powder against no hemostatic agent in planned non-emergent redo cardiac surgery.
• To evaluate the impact on transfusion requirements (packed red blood cells, fresh frozen plasma, platelets).
• To assess chest tube outputs and reoperation rates associated with bleeding.

Main Methods:

• A retrospective cohort (n=26) without hemostatic powder was compared to a prospective cohort (n=25) using absorbable polysaccharide powder.
• Participants underwent planned non-emergent redo cardiac surgery.
• Key metrics included intraoperative and 24-hour transfusion volumes, chest tube outputs at 12, 24, and 48 hours, and reoperation rates.

Main Results:

• The absorbable polysaccharide powder group showed statistically significant lower platelet transfusions (p=0.028) and chest tube outputs at 12 hours (p=0.028) and 12-24 hours (p=0.044).
• While not statistically significant, the powder group had lower average intraoperative packed red blood cell and fresh frozen plasma transfusions.
• Three reoperations for bleeding occurred in the retrospective cohort, versus none in the prospective cohort.

Conclusions:

• Absorbable polysaccharide powder use in redo cardiac surgery is associated with reduced transfusions, lower chest tube outputs, and fewer reoperations.
• These findings suggest a potential benefit of hemostatic powder in managing bleeding during redo cardiac procedures.
• Further randomized controlled trials are warranted to definitively establish the benefits of absorbable polysaccharide powder in this patient population.