Obesity Surgery

, Volume 29, Issue 2, pp 542–551 | Cite as

Tailored One Anastomosis Gastric Bypass: 3-Year Outcomes of 94 Patients

  • Theodoropoulos Charalampos
  • Natoudi Maria
  • Vrakopoulou Gavriella Zoi VrakopoulouEmail author
  • Triantafyllou Tania
  • Dimitrios Raptis
  • Zografos George
  • Leandros Emmanouil
  • Albanopoulos Konstantinos
Original Contributions



One anastomosis gastric bypass (OAGB) claims its place among bariatric operations, proving itself a safe and effective procedure.


This is a retrospective analysis of prospectively collected data regarding 94 patients who underwent surgery in a single surgical unit. Tailoring of the biliopancreatic limb length decided upon preoperative BMI was applied. Patients’ excess weight loss and resolution of comorbidities were evaluated. Data on patients’ nutritional status is also presented.


Mean BMI reduction at 36 months postoperatively was 21.7 ± 6.3 kg/m2. Mean excess weight loss (%EWL) was 83.6%, 91.8%, and 92.5% at 12, 24, and 36 months postoperatively, respectively. When controlling for preoperative BMI, a 36-month %EWL of 89.1% for the 2-m subgroup, a 95.3% for the 2.5-m subgroup, and a 104.7% for the 3-m subgroup were found. Operation’s success, defined as %EWL greater than 50%, was 97.9% 36 months postoperatively. All patients suffering from hypertension, diabetes, and dyslipidemia achieved full remission. Furthermore, the percentage of patients with obstructive sleep apnea and gastroesophageal reflux disease, achieving full remission was 91.7% and 86.7%, respectively. An incidence of 5.3% new onset regurgitation was noted. Iron deficiency presented in 26 (27.7%) patients postoperatively, vitamin B12 deficiency in 13 (13.8%), folic acid deficiency in 18 (19.1%), and mild hypoalbuminemia in 7 (7.4%). Major early postoperative complications (Clavien-Dindo grade ≥ 3) were reported in 1.7% of our patients. One (1.1%) patient developed marginal ulcer and two (2.2) patients had late dumping.


OAGB is a safe and efficient technique; however, careful selection of patients and postoperative surveillance with respect to weight regain and nutritional deficiencies are mandatory for optimal results.


Bariatric surgery Metabolic surgery One anastomosis gastric bypass (OAGB) OAGB effectiveness OAGB results Comorbidities after OAGB EWL after OAGB Tailoring OAGB 


Compliance with ethical standards

Conflict of Interest

All authors declare no conflict of interest.

Informed Consent

Informed consent was obtained from all individual participants included in the study.

Human and Animal Rights

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.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Theodoropoulos Charalampos
    • 1
  • Natoudi Maria
    • 1
  • Vrakopoulou Gavriella Zoi Vrakopoulou
    • 1
    Email author
  • Triantafyllou Tania
    • 1
  • Dimitrios Raptis
    • 2
  • Zografos George
    • 1
  • Leandros Emmanouil
    • 1
  • Albanopoulos Konstantinos
    • 1
  1. 1.First Propaedeutic Surgical Clinic, Hippocratio Athens General Hospital, Athens Medical SchoolNational and Kapodistrian University of AthensAthensGreece
  2. 2.Department of General SurgeryHellenic Air Force 251 General HospitalAthensGreece

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