Incisional herniae following median sternotomy incisions: their incidence and aetiology.

A retrospective study was carried out of all patients undergoing cardiothoracic surgery through a median sternotomy incision under the care of a single surgical firm over an 8 year period in order to assess the incidence and aetiology of incisional epigastric herniae. Of the 582 procedures carried out, follow-up information was obtained in 475 (81.6 per cent) of which 20 (4.2 per cent) had developed incisional herniae (70 per cent of these within 3 months). Seven (35 per cent) of the herniae were symptomatic and required repair. The main predisposing factors were the male sex, the nature of surgery carried out (notably aortic valve replacement), obesity and the presence of postoperative complications of wound infection and left ventricular failure. Herniae were not found in those patients having wound closure using non-absorbable sutures.