Abstract
Background
Bariatric surgery is considered an effective method for sustained weight loss, but
may cause various nutritional complications. The aim of this study was to evaluate
the nutritional status of minerals and vitamins, food consumption, and to monitor
physiologic parameters in patients with obesity before and 6 months after Roux-en-Y
gastric bypass surgery (RYGB).
Methods
Thirty-six patients who had undergone RYGB were prospectively evaluated before and
6 months after surgery. At each phase their weight, height, body mass index (BMI),
Electro Sensor Complex (ES Complex) data, food consumption, and total protein serum
levels, albumin, prealbumin, parathyroid hormone (PTH), zinc (Zn), B12 vitamin (VitB12),
iron (Fe), ferritin, copper (Cu), ionic calcium (CaI), magnesium (Mg), and folic acid
were assessed.
Results
The mean weight loss from baseline to 6 months after surgery was 35.34±4.82%. Markers
of autonomic nervous system balance (P<.01), stiffness index (P<.01), standard deviation of normal-to-normal R-R intervals (SDNN) (P<.01), and insulin resistance (P<.001) were also improved. With regard to the micronutrients measured, 34 patients
demonstrated some kind of deficiency. There was a high percentage of Zn deficiency
in both pre- (55.55%) and postoperative (61.11%) patients, and 33.33% of the patients
were deficient in prealbumin postoperatively. The protein intake after 6 months of
surgery was below the recommended intake (<70 g/d) for 88.88% of the patients. Laboratory
analyses demonstrated an average decrease in total protein (P<.05), prealbumin (P = .002), and PTH (P = .008) between pre- and postsurgery, and a decrease in the percentage of deficiencies
for Mg (P<.05), CaI (P<.05), and Fe (P = .021).
Conclusion
Despite improvements in the autonomic nervous system balance, stiffness index markers
and insulin resistance, we found a high prevalence of hypozincemia at 6 months post-RYGB.
Furthermore, protein supplements were needed to maintain an adequate protein intake
up to 6 months postsurgery.
Keywords
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Article info
Publication history
Published online: May 20, 2014
Accepted:
May 14,
2014
Received:
June 17,
2013
Identification
Copyright
© 2014 American Society for Bariatric Surgery. Published by Elsevier Inc. All rights reserved.
