Visceral obesity appears to be an emerging parameter affecting postoperative outcome after abdominal surgery.
However, total visceral fat remains time consuming to calculate, and there is still a lack of data about its value as an independent risk factor in colorectal surgery.
Dr Minoa Jung and colleagues validated the simple measurement of perirenal fat surface as a surrogate of visceral obesity.
The researchers tested the value of perirenal fat surface as a risk factor for morbidity in colorectal surgery, and compared it with the predictive value of other obesity parameters such as BMI and waist-hip ratio.
The research team performed a prospective observational cohort study at a tertiary university hospital.
The team evaluated 224 consecutive patients undergoing elective colorectal surgery with a mean age of 65 years.
|Overall postoperative complication rate was 23%|
|Diseases of the Colon & Rectum|
The researchers performed elective colorectal resections.
The team assessed complications as the primary outcome measure. Secondary outcome measures were the conversion rates, duration of operation, and length of hospital stay.
Perirenal fat surface was validated as a surrogate of visceral fat and a strong correlation between the 2 was confirmed.
The team found that the overall postoperative complication rate was 23% with 15% moderate complications, and 8% severe complications, with a mortality rate of 0.5%.
Multivariate analysis confirmed perirenal fat surface as an independent risk factor for postoperative complications, whereas BMI and waist-hip ratio were not statistically associated with postoperative complication.
Dr Jung's team concludes, "Perirenal fat surface is an excellent and easy-to-reproduce indicator of visceral fat volume."
"Furthermore, perirenal fat surface is an independent risk factor for postoperative outcome in colorectal surgery that appears to be of higher predictive value than BMI and waist-hip ratio."