Ann R Coll Surg Engl 2006; 88: 252-260 252Medline and Embase were searched using the search terms 'hernia' and 'incisional' alone and in combination. Publications were selected mostly in the past 5 years, but did not exclude commonly reference and highly regarded older publications. The reference list of articles was also searched, identified by the search strategy and those selected that were relevant. Selected review articles and metaanalyses were included because they provide comprehensive overviews that may be beyond the scope of this article.
OverviewThe introduction of prosthetic mesh revolutionised the treatment of groin hernia but, to date, has had little impact on the treatment of incisional hernia.1 The risk factors for the development of incisional hernia include obesity, diabetes, emergency surgery, postoperative wound dehiscence, smoking and postoperative wound infection.
2,3The risks of repairing an incisional hernia which should be explained to the patient when obtaining consent include seroma formation, wound infection, injury to intraabdominal structures and recurrence. 4 Major complications which can occur in repair of large incisional hernias include mesh infection and enterocutaneous fistula which may result in prolonged morbidity and require re-operation (Fig. 1). It is now accepted that only the smallest (less than 3 cm) incisional hernias should be repaired with primary tissue approximation with sutures and this topic will not be discussed further.5 Small incisional hernias with time develop into larger incisional hernias due to the continuous presence of intra-abdominal hydrostatic pressure of 15 cm of water, diaphragmatic contractions occurring with respiration, increases in abdominal pressure occurring with coughing and straining realising pressures of over 80 cm of water and myofascial retraction of the lateral muscles. As a result, the abdominal cavity contracts and the right of domicile for the herniated visceral mass is lost. 6 Due to several previous operations, many of these patients have poor-quality abdominal wall musculature which, coupled with multiple co-morbid medical problems, present a surgical and anaesthetic challenge.Surgeons appear to have a reluctance to operate on incisional hernias perhaps because of the poor general condition of the patients but perhaps also due to lack of knowledge of how to deal with the various defects occurring as a result of incisions of the anterior abdominal wall and the operative techniques required. For instance, although it is estimated that 13% of laparotomy incisions fail in The Netherlands, only 4% of patients undergoing a laparotomy will go through additional surgery to repair an incisional hernia.7 Suture repair is likely to produce results twice as bad as mesh repair and the current techniques that surgeons are using to repair incisional hernias with prosthetic mesh continue to yield recurrence rates of greater than 20%. Many thousand laparotomy incisions are created each year and the failure rate for closure of these abdominal wou...