There is insufficient epidemiologic evidence to draw meaningful conclusions about ( i ) the existence of causal associations between specific occupational mechanical exposures and the development of inguinal hernia , and ( ii ) the influence of these exposures on prognosis after inguinal hernia repair with respect to hernia recurrence and persistent pain
OBJECTIVES The aim of this review was to evaluate the epidemiologic evidence for ( i ) a causal effect of occupational mechanical exposures on incidence of inguinal hernia , and ( ii ) a prognostic effect of such exposures on hernia recurrence and persistent pain after inguinal hernia repair .
Nerve Management and Chronic Pain After Open Inguinal Hernia Repair: A Prospective Two Phase Study
Introduction : This prospect i ve cohort study involved 781 elective primary inguinal hernia operations performed on 736 patients at the Hernia Centre of Reinbek Hospital from April 2000 to April 2002 . Material and Methods : Small hernias were fixed by the Shouldice repair , and large defects by the Lichtenstein repair with conventional polypropylene mesh .  Pain was assessed before the operation , on day 0 , 1 , 2 , 7 , 6 months and 5 years after the operation by the visual analogue scale ( VAS ) . The follow-up was 90.1 % after 6 months and 82.6 % after 5 years . Chronic pain ( CP ) was assessed in relation to preoperative pain , nerve anatomy and intraoperative nerve management . The anatomy of the iliohypogastric nerve ( IHN ) , ilioinguinal nerve ( IIN ) , and genital branch of the genitofemoral nerve ( GB ) before and after surgery was recorded in every operation . Results : The preoperative pain rate was 41.0 % . The CP and sensory disorder rate after 6 months were 16.4 % and 15.9 , respectively . The only independent significant parameters for CP after 6 months were preoperative pain ( P < 0.002 ) and sensory disorder of the groin after 6 months ( P < 0.0001).After 5 years 16.1 % of patients reported pain and 20.3 % sensory disorder of the groin . Independent significant predictors of CP were : Preoperative pain ( P < 0.024 ) , IIN neurolysis in Lichtenstein repair ( = IIN mobilization from its natural bed and nerve preservation ; P < 0.002 ) , CP after 6 months ( P < 0.006 ) and a sensory disorder after 5 years ( P < 0.0001 ) . Eleven of 12 patients with relevant CP ( VAS > 3 ) after 5 years had had a  Lichtenstein repair with IIN neurolysis . The CP population of preoperative pain free patients changed with time : 65 % of the patients with CP after 6 months were pain free after 5 years , and 69 % of the patients with CP after 5 years were asymptomatic after 6 months . Conclusion : Mesh contact with a nerve removed from its natural bed may cause chronic long-term pain . The combination of IIN neurolysis and the Lichtenstein repair should be avoided
There is insufficient epidemiologic evidence to draw meaningful conclusions about ( i ) the existence of causal associations between specific occupational mechanical exposures and the development of inguinal hernia , and ( ii ) the influence of these exposures on prognosis after inguinal hernia repair with respect to hernia recurrence and persistent pain
OBJECTIVES The aim of this review was to evaluate the epidemiologic evidence for ( i ) a causal effect of occupational mechanical exposures on incidence of inguinal hernia , and ( ii ) a prognostic effect of such exposures on hernia recurrence and persistent pain after inguinal hernia repair .