Autogeneic fat transplants in the epidural space in routine lumbar spine surgery.

This report presents our experience with the use of autogeneic fat patch grafts to protect the exposed dura mater during lumbar spine operations. A total of 44 consecutive surgical procedures was performed primarily for discogenic or spondylotic disease from 1979 to 1982. Prophylactic antibiotics were used in 21 (48%) cases. The autogeneic fat transplants were well accepted by all recipients during 10.4 (1 to 32) months of follow-up. Fat grafts, greater than 1 cm in thickness, were easily identified on subsequent computed tomographic (CT) scans. There were no postoperative wound infections. However, 1 patient developed a large subcutaneous sterile fluid accumulation at the fat donor site, which required surgical intervention. Our results, both short and long term, indicate that autogeneic fat transplants may be well tolerated in the lumbar spine area. The fat graft viability as demonstrated by CT scanning and histological examination supports the contention that autogeneic fat interposed between dura mater and overlying musculature may serve as a barrier limiting the growth of cicatrix into the spinal canal.