Nutritional Consequences Of Gastric Restrictive Surgery For Obesity
Need For Vitamin & Mineral Supplements After Gastric Bypass
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Need For Vitamin & Mineral Supplements After Gastric Bypass |
Guide to Weight Loss Surgery - Research Into Gastric Reduction Surgery |
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Nutritional Consequences Of Gastric Restrictive Surgery For Obesity Gastric restrictive surgery in the motivated, cooperative patient, who has been educated in the nutritional requirements to maintain adequate protein/ calorie/ mineral/ vitamin intake, routinely results in a smooth post-operative results, with some protein deficit in the first 3 months after surgery, which is completely restored 18 months after surgery, by which time the patient will have re-established a lean body mass appropriate to the total body weight. Stomach Banding Reduces Volume of Food Intake Pure gastric restrictive procedures such as vertical banded gastroplasty (VBG), silicone ring vertical gastroplasty (SRG), adjustable silicone gastric banding (ASGB) all achieve weight loss by restricting volume of intake. Intake becomes a function of the patients motivation to chew well and eat slowly. Failure to do so may result in repeated vomiting and isolated cases of protein and vitamin deficiency have been reported in these circumstances. Careful patient follow up is therefore mandatory, with particular emphasis on the first three postoperative months. Adjustable silicone gastric banding remains in FDA trials and is not generally available in the USA at this time. Stomach Bypass Limits Calorie/ Nutrient Absorption Gastric bypass with Roux-y results in ingested food bypassing the gastric fundus, body, antrum, duodenum and a variable length of proximal jejunum. In consequence, these patients are at risk to develop iron deficiency secondary to lack of contact of food iron with gastric acid and consequent reduced conversion of iron from the relatively insoluble ferrous to the more absorbable ferric form. In addition, vitamin B12 deficiency may result in consequence of food no longer coming in contact with gastric intrinsic factor. Vitamin D and calcium absorption may also be reduced since the duodenum and proximal jejunum, which are the preferential sites of absorption, are bypassed by this procedure. Need For Nutritional Supplements Life long supplements of multivitamins, vitamin B12 and calcium are mandatory
following this procedure. A corollary of this is the need for long term
follow up for physical, nutritional and metabolic evaluation and counseling. Stomach Bypass Surgery Information |