1/5
BARIATRIC SURGERY AND IRON DEFICIENCY ANEMIA (IDA)
A) DEFINITIONS:
Bariatric surgery = weight loss surgery, includes:
1. Gastric band
2. Gastric sleeve
3. Gastric bypass
BARIATRIC SURGERY AND IRON DEFICIENCY ANEMIA (IDA)
A) DEFINITIONS:
Bariatric surgery = weight loss surgery, includes:
1. Gastric band
2. Gastric sleeve
3. Gastric bypass
2/5
B) PREVALENCE OF ID/IDA
1. Pre-procedure: 10-15% with IDA, up to 30% with ID.
2. Post-procedure: Numbers all over the place because of differences in study design, procedure, dietary guidance and other factors.
Graphic shows data from McMaster cohort.
B) PREVALENCE OF ID/IDA
1. Pre-procedure: 10-15% with IDA, up to 30% with ID.
2. Post-procedure: Numbers all over the place because of differences in study design, procedure, dietary guidance and other factors.
Graphic shows data from McMaster cohort.
3/5
3. The following themes emerge:
3a. Highest prevalence of ID/IDA is with gastric bypass (RYGB).
3b. Prevalence increases with time post procedure.
3c. ID/IDA may occur despite Fe supplementation.
3. The following themes emerge:
3a. Highest prevalence of ID/IDA is with gastric bypass (RYGB).
3b. Prevalence increases with time post procedure.
3c. ID/IDA may occur despite Fe supplementation.
4/5
C) CAUSES OF ID/IDA
1. Bypass of duodenum (site of Fe absorption)
2. Reduced stomach H+
3. Reduced food intake/tolerance of red meat
4. Increased menstrual regularity
C) CAUSES OF ID/IDA
1. Bypass of duodenum (site of Fe absorption)
2. Reduced stomach H+
3. Reduced food intake/tolerance of red meat
4. Increased menstrual regularity
5/5
D) CLINICAL GUIDELINE RECOMMENDATIONS
1. Prevention of ID/IDA: 18-60 mg elemental Fe per day
2. Treatment of ID/IDA:
2a. 150-200 mg elemental iron/day
2b. IV iron infusion should be administered if iron deficiency does not respond to oral therapy
D) CLINICAL GUIDELINE RECOMMENDATIONS
1. Prevention of ID/IDA: 18-60 mg elemental Fe per day
2. Treatment of ID/IDA:
2a. 150-200 mg elemental iron/day
2b. IV iron infusion should be administered if iron deficiency does not respond to oral therapy
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