title: Body composition changes following laparoscopic gastric banding for morbid obesity.
abstract: Most reports of outcome following obesity surgery report weight and co-morbidity changes only. We studied body composition changes in 17 adult patients (15 F, 2 M, age 43+/-2 years, range 28-58 years), with morbid obesity (initial BMI 40.4+/-4.9 kg/m(2), range 34.7-48.8) who were managed surgically by laparoscopically inserting an adjustable gastric band. Body composition was studied before and after surgery (mean interval of 909+/-51 days, range 441-1155 days) using anthropometry (abdominal circumference, AC, sum of four skinfold thicknesses, SFSUM), whole-body potassium counting (TBK), in vivo neutron activation analysis total body nitrogen (TBProtein) and whole-body dual-energy ray absorptiometry (total body percent fat TBF%, and total body bone mineral density TBBMD). Weight loss over the study period was 23.4+/-2.5 kg. ( p<0.0003) with an AC reduction of 20.0+/-4.5 cm ( p<0.008). Both SFSUM and TBF% were significantly reduced ( p<0.02 and p<0.0005 respectively). Both TBK and TBProtein after normalization for sex and height, were significantly ( p<0.0054 and p<0.001 respectively) reduced, but the ratio of loss of fat mass to fat-free mass, at 4.4:1 was usual for weight loss, and there was no significant changes in the ratio of potassium to protein. TBBMD, after normalization relative to a young same sex adult, was not significantly changed. In this group of patients, most of the substantial weight loss over a 2- to 3-year period was due to loss of fat mass, with relatively less reduction in the components of fat-free mass. Adjustable laparoscopic gastric banding induces fat loss without significant other deleterious effects on body composition.
authors: Body Composition Laboratory, Monash Medical Centre, Melbourne, Victoria, Australia. bstrauss@bigfoot.com
authors: B J G
authors: BJ
authors: Strauss
authors: S J
authors: SJ
authors: Marks
authors: J P
authors: JP
authors: Growcott
authors: D B
authors: DB
authors: Stroud
authors: C S
authors: CS
authors: Lo
authors: J B
authors: JB
authors: Dixon
authors: P E
authors: PE
authors: O'Brien
mesh_terms: D015502:Absorptiometry, Photon; D000328:Adult; D000886:Anthropometry; D001823:Body Composition; D015992:Body Mass Index; D001835:Body Weight; D005260:Female; D015391:Gastroplasty / Q000379:methods; D006801:Humans; D010535:Laparoscopy / Q000379:methods; D008297:Male; D008875:Middle Aged; D009584:Nitrogen / Q000378:metabolism; D009767:Obesity, Morbid / Q000601:surgery*; D011188:Potassium / Q000378:metabolism; D011506:Proteins / Q000378:metabolism; D012885:Skinfold Thickness
chemical_list: D011506:Proteins; D009584:Nitrogen; D011188:Potassium