Bariatric Surgery Workup

Updated: Mar 16, 2023
  • Author: Alan A Saber, MD, MS, FACS, FASMBS; Chief Editor: John Geibel, MD, MSc, DSc, AGAF  more...
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Laboratory Studies

Preoperative laboratory evaluation should include the following:

  • Complete blood count (CBC)
  • Complete chemistry panel
  • Liver function tests
  • Thyroid function tests
  • Lipid profile
  • Coagulation tests
  • Serum iron and total iron binding capacity (TIBC)
  • Vitamin B12
  • Folic acid
  • Blood typing
  • Urinalysis

Imaging Studies

Imaging studies to be considered in the setting of bariatric surgery include the following:

  • Chest radiography
  • Ultrasonography (US) of the gallbladder

Diagnostic Procedures

Upper gastrointestinal (GI) endoscopy is performed to rule out intrinsic upper GI disease because after gastric bypass surgery, nonsurgical visualization of the distal stomach and the duodenum could prove challenging.