Ji Guangnian, Zhu Chuanrong, Wang Shaochuang, Zhou Lingling, Dong Xiuxun, Wu Jinsheng
Objective To explore the changes of body composition in an early stage after bariatric surgery to formulate the nutrition and treatment plan. Methods From March 2019 to April 2022, retrospective analysis was performed for 106 patients undergoing laparoscopic sleeve gastrectomy （LSG）. Bioelectrical resistance analysis （BIA） was utilized for detecting body composition, obesity, muscle, water and nutritional parameters pre-operation and during follow-ups. Results LSG was all successfully performed. There were 40 （37.7%） males and 66 （62.3%） females with an average age of （28.4±7.2） year. 85 patients （80.2%）, 72（67.9%）, 65（61.3%） and 60（56.6%） were followed up at Month 1/3/6/12. Body weight, total body water （TBW）, protein, minerals, body fat mass （BFM）, soft lean mass and fat-free mass declined post-operation. Body weight and BFM dropped from （108.6±20.5） and （49.8±12.8） to （72.4±14.7） and （20.1±5.7） kg at Month 12 post-operation. Body mass index （BMI）, percent body fat （PBF）, waist-hip ratio, visceral fat area （VFA）, obesity degree and BFM of limbs/trunk showed a progressive decline. At Month 12 post-operation, BMI decreased from （38.6±5.9） to （26.2±4.6） kg/m2, PBF dropped from （45.4±5.2）% to （26.9±6.2）% and VFA declined from （173±46） to （78±32） cm2. Skeletal muscle mass, arm circumference, arm muscle circumference, muscle mass of upper limbs and trunk decreased in different degrees at Month 6 post-operation. Muscle mass of lower limbs decreased and stabilized at Month 1 post-operation. Intracellular water and extracellular water （ECW） declined while ECW/TBW rose at Month 3 post-operation. InBody score increased at Month 3 and 6 post-operation than that of the previous follow-up time point and body cell mass showed a lowering trend at Month 3 post-operation. Conclusion Body composition changes after bariatric surgery. Thus it may provide scientific rationales for weight control, muscle gain/loss and nutrition balance.
