Biography

Title: Impact of type of bariatric surgery on micronutrient and hemoglobin values 12 months after the procedure.Background: Nutritional deficiencies are a common complication following bariatric surgery and can be caused by malabsorption, among other causes. Some studies have revealed that nutritional deficiencies are more frequent after Roux-en-Y gastric bypass (RYGB) than in patients operated of laparoscopic gastric sleeve (LGS); however others have found no difference, more studies are needed.Material and methods: A retrospective cohort study was performed, including patients who underwent laparoscopic gastric sleeve surgery and patients who underwent laparoscopic Roux-en-Y gastric bypass. 100 patients who met the inclusion criteria were included, in surgeries performed from 2016 to 2022. The anthropometric measurements of the patients, the results of pre-surgical laboratory tests and the follow-up at 1, 3, 6 and 12 months after surgery were recorded. Clinical records were reviewed and recorded in a database. Statistical analysis was performed with SPSS version 29.0. Results: The impact of the type of bariatric procedure was equal in terms of micronutrient deficiencies between patients operated by laparoscopic Roux-en-Y gastric bypass and patients operated by laparoscopic gastric sleeve. There was difference in vitamin D3 levels (p<0.05) being lower in post-surgical RYGB patients than in LGS patients (21.73 ng/ml (±8.49) vs 26.36 ng/ml (±10.74). And in vitamin B12 levels at month 6, being these values lower in BGLYR (466.61 pg/ml (±465.29) vs 654.52 pg/ml (±796.93), p <0.05). Conclusion: We found that the type of bariatric surgery does not impact on micronutrient deficiencies, but it does impact on vitamin D3 levels at 12 months, being these levels lower in postoperative laparoscopic Roux-en-Y gastric bypass than in laparoscopic gastric sleeve and also in vitamin B12 at month 6. It is probably necessary to continue evaluating deficiencies over a longer period of time to determine if these differences are significant in the long term.All authors disclose all financial relationships in this study