Assessment of the Body Composition and the Loss of Fat-Free Mass through Bioelectric Impedance Analysis in Patients Who Underwent Open Gastric Bypass

Abstract

Background. Bariatric surgery is considered an effective option for the management of morbid obesity. The incidence of obesity has been gradually increasing all over the world reaching epidemic proportions in some regions of the world. Obesity can cause a reduction of up to 22% in the life expectancy of morbidly obese patients. Objective. The objective of this paper is to assess the weight loss associated with the first 6 months after bariatric surgery using bioelectric impedance analysis (BIA) for the evaluation of fat mass and fat-free mass. Method. A total of 36 morbidly obese patients were subjected to open gastric bypass surgery. The patients weight was monitored before and after the procedure using the bioelectric impedance analysis. Results. Bariatric surgery resulted in an average percentage of weight loss of 28.6% (40 kg) as determined 6 months after the procedure was performed. Analysis of the different components of body weight indicated an undesirable loss of fat-free mass along with the reduction of total body weight. Conclusion. Open gastric bypass induced a significant loss of total weight and loss of fat-free mass in patients six months after the surgery. The use of bioelectric impedance analysis resulted in an appropriate estimation of the total weight components in individuals subjected to bariatric surgery allowing a more real analysis of the variation of weight after the surgery.

Systemic Inflammation in Severe Obese Patients Undergoing Surgery for Obesity and Weight-Related Diseases

“…The loop food was 100 cm, and the handle was 70 cm biliopancreatic with enteroanastomosis lateral side 3-0 Vicryl running suture in two layers with a diameter of 4 cm. This was first described in 2014 [ 30 ].…”

Clinical impact of Mediterranean-enriched-protein diet on liver size, visceral fat, fat mass, and fat-free mass in patients undergoing sleeve gastrectomy

“…Furthermore, compared with other methods, BIA has several advantages, such as high safety, noninvasiveness, low cost, ease of use, high reproducibility, and adaptability to medical routine, and it has been validated by research in severely obese patients [23][24][25][26][27][28]. In particular, Das et al [28] compared BIA to other commonly used tests for body composition assessment in extremely obese patients and concluded that BIA was suitable for estimating the average variation of FFM and FM.…”

The impact of bariatric surgery on nutritional status of patients.

“…In our own study, in women average content of fat tissue 6 months after the surgery was 41.93 ±8.31% and in men it was 35.3 ±11.20%. In the study by de Freitas Junior, the percentage of fat tissue in the body was 38.67 ±7.86 [ 17 ]. Significant reduction of body mass and fat tissue after bariatric procedures suggests the efficiency of the applied procedure.…”

“…Significant reduction of body mass and fat tissue after bariatric procedures suggests the efficiency of the applied procedure. It should be noted that in the period of intensive body mass loss, also fat-free body mass is reduced, including muscles (approximately 50%), soft tissues, bones and collagen [ 17 ]. Fat-free body mass is an important component of lost body mass after a bariatric procedure, especially during the first 6 months after the surgery [ 18 ].…”

“…In our study, average loss of fat-free body mass in women was 9.42 ±1.48%, and in men it was 11.68 ±10.81%. In the examination conducted among 36 obese patients after open gastric bypass, significant, over 19%, loss of fat-free body mass was observed 6 months after the surgery [ 17 ]. As Chaston et al .…”