Efficacy of Perioperative Thromboprophylactic Agents in the Maintenance of Anastamotic Patency and Survival of Rat Microvascular Free Groin Flaps

Author:

Murthy Prad12,Riesberg Michael V.12,Hart Steve13,Bustillo Andres14,Duque Carlos. S.12,Said Sheriff15,Civantos Francisco. J.12

Affiliation:

1. Miami, Florida

2. Department of Otolaryngology-Head and Neck Surgery, University of Miami School of Medicine.

3. Department of Microvascular Surgery and Orthopedics, University of Miami School of Medicine.

4. University of Miami School of Medicine, University of Miami School of Medicine.

5. Department of Pathology, University of Miami School of Medicine.

Abstract

OBJECTIVES: We sought to determine the thromboprophylactic effects of low-molecular-weight heparin (LMWH) and pentoxifylline. DESIGN: Randomized blinded study. MATERIALS AND METHODS: Sixty Sprague-Dawley rats were assigned to 1 of 4 treatment groups: (1) control group (n = 15), (2) pentoxifylline group (n = 15), (3) LMWH group (n = 15), and (4) combined therapy group (n = 15). A groin/abdominal free flap was elevated in each, with division of the artery and microvascular repair The animals received therapy for 4 days preoperatively and 6 days postoperatively. Flaps were monitored visually, and on the seventh postoperative day, the flap was elevated, and the microvascular anastomosis was assessed for patency. RESULTS: There was a statistically significant improvement in arterial patency in both pentoxifylline and LMWH groups compared with controls ( P < 0.01) but no significant improvement with combined therapy ( P > 0.05). CONCLUSIONS: In this animal model, LMWH and pentoxifylline have significant thrombroprophylactic effects when used individually but not in combination.

Publisher

SAGE Publications

Subject

Otorhinolaryngology,Surgery

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