Introduction to bariatric surgery – types, complications and procedures

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This training is intended for dietitian-nutritionists who wish to adjust their practice for clients who have undergone bariatric surgery.

Participants will be able to differentiate between the main types of bariatric surgery, the advantages and disadvantages of each, as well as possible complications.

In the second module of this training, participants will learn the key points of a preoperative nutritional assessment as well as the risks of nutritional deficiencies. Participants will also learn about dietary progression and nutritional recommendations in the immediate post-operative period.

Finally, in the last module, participants will be able to identify the risks of nutritional deficiencies and deficiencies post-operatively and make appropriate recommendations based on the side effects present.

Course plan

Module 1: Surgery

  • Introduction: The trainer’s journey
  • Surgery – When and why?: Decision algorithm for bariatric surgery
  • Main surgical approaches
    • Gastric ring
    • Parietal gastrectomy
    • Roux-en-Y
    • Biliopancreatic bypass with duodenal switching (DBP)
    • Single duodeno-ileal anastomosis (or SADI)
  • Prevalence of different surgeries in the world
  • Risks and benefits
  • Possible complications
  • Quiz

Module 2: Immediate Pre- and Post-Operative Nutritional Follow-up

  • Pre-operative nutritional follow-up
    • Possible contraindications of surgery
      • Contraindications
      • Age debate
    • Nutritional recommendations
      • Preoperative goals and recommendations
      • Items to be questioned during the pre-operative assessment
      • Should we aim for pre-surgical weight loss?
    • Preoperative nutritional deficiencies
      • Nutritional deficiencies
      • Pre-operative deficiency assessment table
    • Recommended vitamin and mineral supplements
      • Vitamin and mineral supplements recommendations
      • Signs and symptoms of dietary deficiencies
  • Immediate post-operative nutritional follow-up
    • Dietary progression
      • Summary of dietary progressions suggested by different organizations
      • Example of dietary progression after parietal gastrectomy (IUCPQ)
    • Nutritional recommendations
    • ASMBS/TOS/AACEOMA/ASA recommendations
  • Quiz

Module 3: Post-Operative Nutritional Follow-up

  • Post-operative nutritional assessment
    • Post-operative objectives
    • Items to be questioned during post-operative assessment
    • Criteria for bariatric success
  • Nutritional recommendations
    • General recommendations
    • Macronutrients
    • Changes in food preferences and intolerances
    • Liquid calories
    • Eating behaviors
  • Dietary deficiencies
    • Most frequent deficiencies
    • ASMBS recommendations
  • Vitamin and mineral supplements
  • Complications and side effects
    • Complications and side effects
    • Gastrointestinal side effects
    • Other complications
    • Weight gain
    • Eating disorders
  • Other considerations
  • Quiz

* You can view the online training whenever you want, there is no deadline for completion.

* You will receive all the necessary information by email to view it within 24-48 business hours.


  1. Know the eligibility criteria for bariatric surgery according to the decisional algorithm and possible contraindications.
  2. Recognize the major bariatric surgeries and the difference between restrictive and malabsorptive surgery.
  3. Understand the risks and benefits of bariatric surgery as well as the advantages and disadvantages of each surgery.
  4. Know how to make nutritional recommendations and be aware of the risks of pre-surgical deficiencies.
  5. Understand the dietary progression as well as the nutritional recommendations in the immediate postoperative period.
  6. Identify the risks of postoperative macro and micronutrient deficiencies and apply appropriate recommendations.
  7. Know the recommended supplementation for different types of postoperative surgery.
  8. Know the different side effects and how to apply adequate nutritional recommendations when necessary.

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