Abstract

Lumbar incisional hernias after open nephrectomy are rare but can lead to aesthetic disorder, discomfort or intestinal obstruction. The aim of the study is to highlight their risk factors. The characteristics of patients who suffered from symptomatic and surgically treated lumbar incisionnal hernia after open nephrectomy (study group "GE") were compared to those of patients who underwent open nephrectomy without postoperative incisional hernia (control group "GT") using the Student's t test and Mann-Whitney test (statistical significance P value<0.05). GT patients were randomly selected with a 1/4 ratio (1 lumbar incisionnal hernia vs 4 controls). From 2004 to 2014, 417 open nephrectomies were performed in one university hospital. Forty-five patients were included: 9 in GE and 36 in GT. There was no statistically significant difference between GT and GE for weight, height, body mass index (BMI), emergency, partial nephrectomy, laterality, rib resection, laparoscopic conversion to open surgery, postoperative complications, smoking, diabetes mellitus, cardiovascular history, obesity and sex, but there was a statistically significant difference for age, operative time, chronic obstructive pulmonary disease (COPD) and severe obesity (BMI>35) with, respectively, P=0.05, P=0.02, P=0.04 and P=0.02. Risk factors for lumbar incisional hernia after open nephrectomy are age, operative time, severe obesity and COPD. 5.

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