ABSTRACT

Obesity is an ongoing problem within the United States and other Westernized countries and contributes to a variety of medical conditions, including diabetes mellitus, cardiovascular disease, sleep apnea syndrome, osteoarthritis, liver disease, and various cancers.1-5 The discussion of the anatomic and technical aspects of bariatric procedures is not the goal of this chapter, but two widely performed procedures include the Roux-en-Y and the biliopancreatic diversion/duodenal switch (BPD). Restrictive and, to some degree, malabsorptive complications occur with the Roux-en-Y procedure, whereas malabsorptive complications dominate the nutritional deficiencies encountered in patients having BPD.6 Anemia is common after bariatric surgery,

4.1 Introduction .................................................................................................... 61 4.2 Anatomic and Physiologic Mechanisms for Post-Bariatric Surgery

Anemia ....................................................................................................... 62 4.3 Stomach .......................................................................................................... 62 4.4 Small Bowel .................................................................................................... 63 4.5 Causes of Anemia in the Immediate Postoperative Setting ...........................64 4.6 Late-Onset Anemia Following Bariatric Surgery ..........................................65 4.7 Specific Causes of Anemia Following Bariatric Surgery ...............................65