Complications and risk factors in 2731 diagnostic mini-laparoscopies in patients with liver disease

Background/Aims Mini-laparoscopy (ML) allows macroscopic assessment and biopsy under direct vision and therefore is a valuable technique in the diagnosis of liver disease. Herein we report procedure-related complications and risk factors. Methods A total of 2731 consecutive patients underwent diagnostic ML at two university hospitals (June 1996December 2007). ML was performed using standard technique with a 1.9mm optical instrument. Coagulation of the liver biopsy site was performed with APC. The following variables were analysed as risk factors for complications: platelet count (<50/nL), international normalized ratio (INR) (>1.5), Cirrhosis, signs of portal hypertension, prior abdominal surgery. Results Major complications occurred in 1.0% (n=27) of patients and these were, delayed bleeding from the liver biopsy site or abdominal wall (in 0.7% of patients) and intestinal perforation (in 0.3% of patients). Two patients died after severe haemorrhage (mortality 0.07%); the other patients recovered without sequelae. Bleeding risk was increased in patients with low platelets (OR=6.1), increased INR (OR=8.9), cirrhosis (OR=1.9) and portal hypertension (OR=2.1). Logistic regression showed a significant correlation only for the concurrence of low platelets and increased INR (P=0.001; OR=14.1); bootstrap analysis identified INR >1.5 as significant predictor (P=0.0002). Prior abdominal surgery did not carry a significant risk for intestinal perforation (OR=1.1; P= 0.142), unless abdominal adhesions were present (OR=9.5; P=0.0002). None of the patients required surgery for intestinal perforation. Conclusion Mini-laparoscopy is a diagnostic technique with a low complication rate. However, in patients with increased INR, low platelets or after extensive abdominal surgery, complications may occur in up to 5%.