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Intravenous iron is an option when per oral iron is insufficient or not tolerated. This study explores whether routinely offering intravenous iron treatment when iron stores are empty can prevent anaemia and iron deficiency after RYGB.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>This is a study of prospectively registered data on clinical information, haematological tests and intravenous iron treatment from 644 RYGB patients who underwent surgery between 2004 and 2013, postoperatively followed more than 5\u00a0years. Intravenous iron treatment was offered to patients with ferritin \u2264\u200915\u00a0\u03bcg\/L.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>Clinical information was available for all patients at baseline and for 553\/644 patients at 5\u00a0years; laboratory results were available for 540\/644 patients at baseline and 411\/644 patients after 5\u00a0years. The mean age was 39.8 (\u00b1\u20099.7)\u00a0years. Overall, 187\/483 (38.7%) women and 9\/161 (5.6%) men were given intravenous iron treatment in the observation period. From baseline to 5\u00a0years, mean haemoglobin decreased by 0.3\u00a0g\/dL in both men and women. Anaemia occurred in 18\/311 (5.8%) women and 9\/100 (9%) men at 5\u00a0years. Depleted iron stores (ferritin \u2264\u200915\u00a0\u03bcg\/L) were seen among 44\/323(13.6%) women and 3\/102 (2.9%) men, and low iron stores (ferritin 16\u201350\u00a0\u03bcg\/L) occurred in 144\/326 (44.6%) women and 38\/102 (37.3%) men 5\u00a0years after RYGB.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>By routinely offering intravenous iron treatment to patients with depleted iron stores after RYGB, haemoglobin levels were preserved. Half of the patients experienced low or depleted iron stores at 5\u00a0years.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s11695-020-04396-5","type":"journal-article","created":{"date-parts":[[2020,1,18]],"date-time":"2020-01-18T11:02:33Z","timestamp":1579345353000},"page":"1745-1752","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Intravenous Iron Treatment in the Prevention of Iron Deficiency and Anaemia After Roux-en-Y Gastric Bypass"],"prefix":"10.1007","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7093-3357","authenticated-orcid":false,"given":"Jorunn","family":"Sandvik","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Torstein","family":"Hole","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christian A.","family":"Kl\u00f6ckner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B\u00e5rd Eirik","family":"Kulseng","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arne","family":"Wibe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2020,1,18]]},"reference":[{"issue":"6","key":"4396_CR1","doi-asserted-by":"publisher","first-page":"1345","DOI":"10.1016\/S0039-6109(16)38384-0","volume":"47","author":"EE Mason","year":"1967","unstructured":"Mason EE, Ito C. 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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and\/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Compliance with Ethical Standards"}},{"value":"The authors declare that they have no conflict of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of Interest"}}]}}