title: The impact of bariatric surgery on nutritional status of patients.
abstract: BACKGROUND
  Currently, surgical treatment is considered to be the most efficient method of dealing with morbid obesity.
  
  
  OBJECTIVE
  To evaluate changes in nutritional status after surgical treatment of obesity in the early postoperative period.
  
  
  METHODS
  The study included 50 patients (30 women and 20 men) treated surgically due to morbid obesity. During the preliminary visit and during control visits measurements of body mass, height, and waist and hip circumference were conducted. Also, analysis of body content was performed and blood was taken for biochemical analysis. Statistical analysis was conducted using the program Statistica 10.
  
  
  RESULTS
  Six months after the surgery, in the group of women, significant reduction of average body mass, average waist circumference, average hip circumference and average body mass index (BMI) was observed. Also, significant reduction of the percentage of body fat and an increase in the percentage of fat-free body mass were observed. A significant decrease in muscle mass was also noted. Both in women and in men, 6 months after the surgery, a significant decrease in fasting glucose concentration, fasting insulin and triglycerides in blood serum was observed.
  
  
  CONCLUSIONS
  Bariatric procedures lead to significant body mass, BMI, waist and hip circumference reduction. Loss of body mass is caused mainly by the reduction of fat tissue. Application of surgical procedures in morbid obesity treatment also allowed us to achieve improvement in insulin, glucose and lipid metabolism.
authors.affiliation: Department of Dietetics and Clinical Nutrition, Medical University of Bialystok, Bialystok, Poland.
authors.forename: Marta
authors.initials: M
authors.lastname: Jastrzębska-Mierzyńska
authors.affiliation: Department of Dietetics and Clinical Nutrition, Medical University of Bialystok, Bialystok, Poland.
authors.forename: Lucyna
authors.initials: L
authors.lastname: Ostrowska
authors.affiliation: 1 Clinical Department of General and Endocrine Surgery, Medical University of Bialystok, Bialystok, Poland.
authors.forename: Hady Razak
authors.initials: HR
authors.lastname: Hady
authors.affiliation: 1 Clinical Department of General and Endocrine Surgery, Medical University of Bialystok, Bialystok, Poland.
authors.forename: Jacek
authors.initials: J
authors.lastname: Dadan
authors.affiliation: Department of Emergency Medicine and Disasters, Medical University of Bialystok, Bialystok, Poland.
authors.forename: Emilia
authors.initials: E
authors.lastname: Konarzewska-Duchnowska
keywords: body composition; morbid obesity; nutritional status; obesity surgery