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Increased Flap Weight and Decreased Perforator Number Predict Fat Necrosis in DIEP Breast Reconstruction
Carolyn L Mulvey1, Carisa M Cooney1, Francis F Daily1
1Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, Md.; and Department of Biostatistics, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Md.
Increased flap weight in autologous breast reconstruction correlates with higher fat necrosis risk. Utilizing multiple perforators, especially in heavier flaps, may reduce this complication, optimizing outcomes for patients undergoing DIEP or MS-TRAM procedures.
Area of Science:
- Plastic Surgery
- Reconstructive Surgery
- Microsurgery
Background:
- Autologous breast reconstruction aims to restore form after mastectomy.
- Compromised flap perfusion can lead to fat necrosis and flap loss.
- Flap weight and perforator vessel count are critical factors in perfusion.
Purpose of the Study:
- To investigate the relationship between flap weight, perforator number, and fat necrosis in deep inferior epigastric perforator (DIEP) and muscle-sparing transverse rectus abdominis myocutaneous (MS-TRAM) flaps.
- To identify factors influencing outcomes in autologous breast reconstruction.
Main Methods:
- Retrospective review of 123 patients undergoing 179 DIEP and/or MS-TRAM flap reconstructions (2010-2011).
- Data collected included patient demographics, comorbidities, intraoperative parameters, and postoperative outcomes (fat necrosis, complications).
- Logistic regression analysis assessed the impact of flap weight and perforator number on fat necrosis.
Main Results:
- Thirteen flaps (7.5%) experienced fat necrosis.
- Increased flap weight (OR 1.5 per 100g increase) and African American race (OR 11.58) were associated with higher fat necrosis risk.
- Single perforator flaps >1000g had a 42.9% fat necrosis rate, compared to 14.3% in large multiple perforator flaps.
Conclusions:
- Flap weight is a significant risk factor for fat necrosis in autologous breast reconstruction.
- Employing multiple perforators may mitigate fat necrosis risk in heavier flaps.
- Optimizing outcomes requires consideration of patient factors (race, BMI) and surgical parameters (perforator number, flap weight).
