The CONVENTION (CONtaminated VENtral hernia risk stratificaTION) tool has been developed in collaboration between St. Mark's Hospital, London and The Academic Medical Centre, Amsterdam, with funding kindly provided by the British Hernia Society.
This tool has been devloped and validated for use in pre-operative risk stratification for patients with Ventral Hernia Working Group grade 3 or 4† or modified Ventral Hernia Working Group grade 3‡ midline ventral hernias.
The risk of the following short- and long-term post-operative outcomes can be calculated from the factors requested in the form: Clavien Dindo grade of 3 or more; wound intervention required (defined as need for interventional radiology or surgical intervention post-repair) and intra abdominal septic complication (defined as need for interventional radiology or surgical intervention for intra-abdominal collection or anastomotic leak post-repair). Long-term outcome is the need for further hernia surgery.
References:
† Ventral Hernia Working Gp., Breuing K, Butler CE, Ferzoco S, Franz M, Hultman CS et al. Incisional ventral hernias: review of the literature and recommendations regarding the grading and technique of repair. Surgery 2010;148(3):544-58
‡ Kanters AE, Krpata DM, Blatnik JA, Novitsky YM, Rosen MJ. Modified hernia grading scale to stratify surgical site occurrence after open ventral hernia repairs. J Am. Coll. Surg. 2012;215(6):787-93
Disclaimer: This calculator has been developed for the guidance of clinicians and not as a replacement for clinical experience or judgement. This is not a diagnostic application and does not provide a clinical recommendation. The developers assume no liability or responsibility for any clinical decision, injury, death or other event arising from the use of this website. Data are validated for the Clavien Dindo outcome in a European adult (<18 years) population. Further development for the remaining models is ongoing.
