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Anemia and iron deficiency before and after bariatric surgery.
Surg Obes Relat Dis 2014 Jan-Feb; 10(1):49-54SO

Abstract

BACKGROUND

Iron deficiency and anemia are changes often associated with obesity. Bariatric surgery is responsible for increasing the iron loss and reducing its absorption. The objective of this study was to evaluate anemia and iron deficiency before and after bariatric surgery and to relate them to possible predisposing factors.

METHODS

A retrospective study was conducted on obese patients submitted to open Roux-en-Y gastric bypass, in which clinical and laboratory data were obtained up to 48 months postoperatively. Patients were divided into groups according to the presence or absence of anemia and to the presence or absence of iron deficiency (even without anemia), and all data were compared between these groups.

RESULTS

Preoperatively, 21.5% of patients had anemia and 20% had iron deficiency. The number of patients with anemia did not vary through the 4 years of the study, but ferritin levels significantly decreased with time (P<.01). Younger patients and patients with greater weight loss had a higher incidence of anemia. Female gender was a variable associated with a greater incidence of iron deficiency.

CONCLUSIONS

Anemia and iron deficiency are frequent in obese patients and must be treated before surgery. Medical and nutritional surveillance is important in the postoperative period of bariatric surgery. Management of each condition must be directed at correcting the 2 major sources of iron deficiency and anemia: food intolerance (mostly meat intolerance) and losses (frequently due to menstruation). These are the factors more related to iron deficient anemia.

Authors+Show Affiliations

Department of Surgery and Anatomy, Clinical Hospital of the Medical School of Ribeirão Preto, University of São Paulo, São Paulo, Brazil. Electronic address: wsalgado@fmrp.usp.br.Medical School of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.Nutritional Division of the Department of Internal Medicine, Clinical Hospital of the Medical School of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.Department of Surgery and Anatomy, Clinical Hospital of the Medical School of Ribeirão Preto, University of São Paulo, São Paulo, Brazil.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

24071485

Citation

Salgado, Wilson, et al. "Anemia and Iron Deficiency Before and After Bariatric Surgery." Surgery for Obesity and Related Diseases : Official Journal of the American Society for Bariatric Surgery, vol. 10, no. 1, 2014, pp. 49-54.
Salgado W, Modotti C, Nonino CB, et al. Anemia and iron deficiency before and after bariatric surgery. Surg Obes Relat Dis. 2014;10(1):49-54.
Salgado, W., Modotti, C., Nonino, C. B., & Ceneviva, R. (2014). Anemia and iron deficiency before and after bariatric surgery. Surgery for Obesity and Related Diseases : Official Journal of the American Society for Bariatric Surgery, 10(1), pp. 49-54. doi:10.1016/j.soard.2013.06.012.
Salgado W, et al. Anemia and Iron Deficiency Before and After Bariatric Surgery. Surg Obes Relat Dis. 2014;10(1):49-54. PubMed PMID: 24071485.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Anemia and iron deficiency before and after bariatric surgery. AU - Salgado,Wilson,Jr AU - Modotti,Caue, AU - Nonino,Carla Barbosa, AU - Ceneviva,Reginaldo, Y1 - 2013/06/15/ PY - 2013/02/21/received PY - 2013/05/28/revised PY - 2013/06/07/accepted PY - 2013/9/28/entrez PY - 2013/9/28/pubmed PY - 2014/10/25/medline KW - Anemia KW - Bariatric surgery KW - Iron deficiency KW - Obesity SP - 49 EP - 54 JF - Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery JO - Surg Obes Relat Dis VL - 10 IS - 1 N2 - BACKGROUND: Iron deficiency and anemia are changes often associated with obesity. Bariatric surgery is responsible for increasing the iron loss and reducing its absorption. The objective of this study was to evaluate anemia and iron deficiency before and after bariatric surgery and to relate them to possible predisposing factors. METHODS: A retrospective study was conducted on obese patients submitted to open Roux-en-Y gastric bypass, in which clinical and laboratory data were obtained up to 48 months postoperatively. Patients were divided into groups according to the presence or absence of anemia and to the presence or absence of iron deficiency (even without anemia), and all data were compared between these groups. RESULTS: Preoperatively, 21.5% of patients had anemia and 20% had iron deficiency. The number of patients with anemia did not vary through the 4 years of the study, but ferritin levels significantly decreased with time (P<.01). Younger patients and patients with greater weight loss had a higher incidence of anemia. Female gender was a variable associated with a greater incidence of iron deficiency. CONCLUSIONS: Anemia and iron deficiency are frequent in obese patients and must be treated before surgery. Medical and nutritional surveillance is important in the postoperative period of bariatric surgery. Management of each condition must be directed at correcting the 2 major sources of iron deficiency and anemia: food intolerance (mostly meat intolerance) and losses (frequently due to menstruation). These are the factors more related to iron deficient anemia. SN - 1878-7533 UR - https://www.unboundmedicine.com/medline/citation/24071485/Anemia_and_iron_deficiency_before_and_after_bariatric_surgery_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1550-7289(13)00189-5 DB - PRIME DP - Unbound Medicine ER -