Question

Case Scenario: A young woman presents at the clinic six weeks after a gastric bypass surgery....

Case Scenario: A young woman presents at the clinic six weeks after a gastric bypass surgery. She had more than 100 pounds to lose and so far, she has lost 40 pounds. She expected to gain some strength and begin exercising, but she is very weak. She states that at times she is too weak to even comb her hair. she eats small meals several times a day, but has water diarrhea and is nauseated much of the time. She is losing her hair and is very discouraged.

Question; explain how gastric bypass affects your ability to absorb and use nutrients. Including your answer specific facts, data, examples, and other information drawn from your textbook and at least one other supplemental source.

Homework Answers

Answer #1

The solubility of a drug, surface area for absorption, and blood flow to the gastrointestinal tract influence oral absorption and bioavailability. Drug solubility and surface area for absorption are affected by gastric bypass procedures. Drugs in aqueous solution are more rapidly absorbed than those in oily solutions, suspensions, or solid form. When medications are given as tablets, the times to disintegration and dissolution of the tablet affect absorption. In early drug trials, these factors are accounted and adjusted for to ensure adequate absorption in patients with unaltered gastrointestinal tracts. However, reductions in the amount of functioning gastrointestinal tract after gastric bypass surgery lead to decreased time to drug absorption and reduced drug bioavailability.

Considerations for Nutrient Replacement

Nutrient deficiencies in patients who have had restrictive procedures have been reported.the exact prevalence is unknown. Because restrictive procedures retain the use of the entire gastrointestinal tract, nutrient deficiencies are less common than in patients who have had gastric bypass procedures. After gastric bypass procedures, patients are prone to deficiencies of the fat-soluble vitamins (A, D, E, and K) and calcium.In addition, these patients have an increased risk of developing anemia secondary to potentially inadequate amounts of iron, vitamin B12, and folate. Because of these deficits, all patients should receive a daily multivitamin and calcium supplementation indefinitely.In patients with anemia, additional supplementation with iron, vitamin B12, and folate may be necessary.

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