Purpose: This study was undertaken to address the effect of platelet dysfunction on bleeding associated with percutaneous needle biopsy.
Materials And Methods: With use of an established animal model, 199 biopsies were performed on the livers of 13 anesthetized pigs (95 on control animals, 104 on venopirin-treated animals). The needles used were 16-22-gauge Chiba type, 18-gauge Tru-Cut, and 18-gauge Menghini. The biopsies were performed under direct vision at laparotomy with consistent technique. Blood loss was measured, and the results were compared. Statistical analysis was performed with the Student t test and the Turkey test, after logarithmic transformation of the data.
Results: A substantial increase in blood loss resulting from the biopsy procedures was demonstrated in the animals with platelet dysfunction. This was much greater than the effect of either needle size or prothrombin time prolongation previously reported by the authors.
Conclusion: Platelet function may be an important factor in determining the risk of bleeding due to percutaneous needle biopsy.
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