World Journal of Surgery

, Volume 43, Issue 1, pp 199–206 | Cite as

Assessment of the Correlation Between Preoperative and Immediate Postoperative Gastric Volume and Weight Loss After Sleeve Gastrectomy Using Computed Tomography Volumetry

  • Hosam Elbanna
  • Sameh EmileEmail author
  • Galal El-Sayed El-Hawary
  • Noha Abdelsalam
  • Hossam Abdelhafiz Zaytoun
  • Haitham Elkaffas
  • Ahmed Ghanem
Original Scientific Report



Laparoscopic sleeve gastrectomy (LSG) has achieved excellent results in treatment of morbid obesity. The present study aimed to evaluate the impact of the preoperative gastric volume, volume of the remaining gastric pouch, and volume of the resected stomach on weight loss after LSG.


Patients with morbid obesity who underwent LSG were investigated by CT volumetry before and 1 week after LSG to measure the volume of the stomach before and after the procedure, and the volume of the resected stomach was also calculated. The percentage of excess weight loss (EWL) and decrease in body mass index (BMI) at 6 months postoperatively were measured and correlated with preoperative and postoperative gastric volumes.


Forty-seven patients (44 females) were included to the study. A significant decrease in the gastric volume and BMI after LSG was noted. Preoperative gastric volume was positively correlated with preoperative BMI (r = 0.723, p < 0.00001) but not correlated with %EWL at 6 months. The volume of the remaining gastric pouch was positively correlated with BMI at 6 months postoperatively (r = 0.597, p < 0.00001) and negatively correlated with %EWL (r = −0.7495, p < 0.00001). The correlation between the size of resected stomach and %EWL was statistically insignificant, yet the mean percentage of the resected stomach was directly correlated to %EWL.


The preoperative volume of the stomach was positively correlated with baseline BMI, but not correlated with %EWL. The size of the remaining gastric pouch and the percentage of the resected stomach had significant impact on %EWL after LSG.


Author contributions

Hossam Elbanna designed the study, contributed to data collection and analysis and writing of the manuscript. Sameh Emile contributed in data collection and analysis and writing of the manuscript. Galal El-Hawary and Hossam Zaytoun performed CT volumetry for the patients before and after surgery and contributed to data collection and analysis. Noha Abdelsalam contributed to data analysis and writing and critical revision of the manuscript. Ahmed Ghanem and Haitham Elkaffas contributed to data collection, drafting and revision of the manuscript.

Compliance with ethical standards

Conflict of interest

All authors declare no conflicts of interest related to this article.


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Copyright information

© Société Internationale de Chirurgie 2018

Authors and Affiliations

  • Hosam Elbanna
    • 1
  • Sameh Emile
    • 1
    Email author
  • Galal El-Sayed El-Hawary
    • 2
  • Noha Abdelsalam
    • 3
  • Hossam Abdelhafiz Zaytoun
    • 2
  • Haitham Elkaffas
    • 1
  • Ahmed Ghanem
    • 1
  1. 1.Colorectal Surgery Unit, General Surgery Department, Mansoura University Hospitals, Faculty of MedicineMansoura UniversityMansoura CityEgypt
  2. 2.Radiology Department, Tanta University Hospitals, Faculty of MedicineTanta UniversityTanta CityEgypt
  3. 3.Rheumatology and Immunology Unit, Internal Medicine Department, Mansoura University Hospitals, Faculty of MedicineMansoura UniversityMansoura CityEgypt

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