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3D Volumetry and its Correlation Between Postoperative Gastric Volume and Excess Weight Loss After Sleeve Gastrectomy

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Abstract

Background

The volume of the postoperative gastric remnant is a key factor in excess weight loss (EWL) after sleeve gastrectomy (SG). Traditional methods to estimate gastric volume (GV) after bariatric procedures are often inaccurate; usually conventional biplanar contrast studies are used.

Methods

Thirty patients who underwent SG were followed prospectively and evaluated at 6 months after the surgical procedure, performing 3D CT reconstruction and gastric volumetry, to establish its relationship with EWL. The gastric remnant was distended with effervescent sodium bicarbonate given orally. Helical CT images were acquired and reconstructed; GV was estimated with the software of the CT device. The relationship between GV and EWL was analyzed.

Results

The study allowed estimating the GV in all patients. A dispersion diagram showed an inverse relationship between GV and %EWL. 55.5% of patients with GV ≤ 100 ml had %EWL 25–75% and 38.8% had an %EWL above 75% and patients with GV ≥ 100 ml had an %EWL under 25% (50% of patients) or between 25 and 75% (50% of this group). The Pearson’s correlation coefficient was R = 6.62, with bilateral significance (p ≤ .01). The Chi-square result correlating GV and EWL showed a significance of .005 (p ≤ .01). The 3D reconstructions showed accurately the shape and anatomic details of the gastric remnant.

Conclusions

3D volumetry CT scans accurately estimate GV after SG. A significant relationship between GV and EWL 6 months after SG was established, seeming that GV ≥ 100 ml at 6 months of SG is associated with poor EWL.

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Authors and Affiliations

  1. Instituto Medico La Floresta, Av. Ppal. La Floresta, Consultorio 109, Caracas, Miranda, 1060, Venezuela

    Andrés Hanssen, Sergio Plotnikov, Geylor Acosta, José Tomas Nuñez, José Haddad, Carmen Rodriguez, Claudia Petrucci, Diego Hanssen & Rafael Hanssen

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  1. Andrés Hanssen
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  2. Sergio Plotnikov
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  3. Geylor Acosta
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  4. José Tomas Nuñez
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  5. José Haddad
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  6. Carmen Rodriguez
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  7. Claudia Petrucci
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  8. Diego Hanssen
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  9. Rafael Hanssen
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Correspondence to Andrés Hanssen.

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The authors declare that they have no conflict of interest.

Ethical Approval

All procedures performed in this study were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments.

Informed Consent

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

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Hanssen, A., Plotnikov, S., Acosta, G. et al. 3D Volumetry and its Correlation Between Postoperative Gastric Volume and Excess Weight Loss After Sleeve Gastrectomy. OBES SURG 28, 775–780 (2018). https://doi.org/10.1007/s11695-017-2927-8

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  • DOI: https://doi.org/10.1007/s11695-017-2927-8

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