Correlation of Preoperative Gastric Residual Volume With Body Mass Index and Aspiration Risk in Laparoscopic Bariatric Surgery

Launched by FATIH SULTAN MEHMET TRAINING AND RESEARCH HOSPITAL · Jun 13, 2025

Keywords

ClinConnect Summary

This clinical trial is studying how the amount of stomach contents left before surgery (called gastric residual volume) relates to a person’s body weight and risk of breathing in stomach contents during laparoscopic weight-loss surgery. Since obesity can slow down how fast the stomach empties, this study uses a painless ultrasound scan before surgery to measure how much food or liquid is still in the stomach. The goal is to better understand if people with higher body weight have a higher risk of this complication, which can be serious during anesthesia.

People who may join this study are adults between 18 and 65 years old who have a body mass index (BMI) over 35, meaning they are classified as obese, and who are scheduled for planned bariatric (weight-loss) surgery under general anesthesia. Participants will undergo a simple ultrasound exam before their surgery to check their stomach contents. The study does not include people who are pregnant, have certain stomach or digestive problems, or have serious health conditions that might affect the results. Taking part helps doctors learn more about safely managing anesthesia for people having weight-loss surgery.

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • Patients who will undergo bariatric surgery under general anesthesia in elective conditions
• • Patients in ASA II-III groups, with BMI \> 35 kg/m², and aged between 18-65 years
• • Patients who have provided informed consent
• Exclusion Criteria:
• • Patients under 18 years of age, over 65 years of age, or in ASA IV-V groups
• • Pregnancy
• • Patients with upper gastrointestinal (GI) abnormalities such as hiatal hernia and gastric tumors
• • Patients with a recent history of upper GI bleeding (within the last 12 months), previous stomach and esophagus surgeries, or abnormal anatomy of the upper gastrointestinal tract
• • Patients using medications that affect gastric motility or other related conditions
• • Patients with uncontrolled diabetes
• • Patients who require emergency surgery
• • Patients with advanced cardiac, renal, pulmonary, or hepatic failure
• • Patients who refuse to participate and do not provide informed consent