Residual Gastric Content and GLP-1

NCT ID: NCT06814080

Last Updated: 2025-09-18

Basic Information

• Recruitment Status: RECRUITING
• Total Enrollment: 45 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2025-05-22
• Study Completion Date: 2026-08-31

Brief Summary

Studies have shown that even following the fasting guideline, patients on GLP-1 still have residual gastric content which increases their risk of aspiration during anesthesia. We aim to investigate the prevalence of full stomachs following different fasting times.

Detailed Description

Glucagon-like peptide-1 (GLP-1) receptor agonists have become increasingly popular as both diabetic and weight loss therapies. One effect of this class of medication is delayed gastric emptying, which may impact the risk of aspiration during anesthesia delivery. Some of them have a very long half-life of approximately one week. Thus, it takes approximately five weeks to achieve its steady-state concentration, and just as long for its effects to terminate after stopping the drug.

As a standard of care, patients are allowed to drink up to 2 hours and to eat up to 8 hours before surgery. Studies have shown that even following the fasting guideline, patients still have residual gastric content which increases their risk of aspiration during anesthesia. Since stopping these drugs for a long time is not practical as it is going to disrupt their glycemic control and reverse the weight loss, we propose to test extending the fasting time.

We aim to investigate the prevalence of full stomachs following different fasting times.

patients will be assigned to one of three groups: Group 1(G1) with 8-hour fasting, Group 2 (G2) with 10-hour fasting, and Group 3 (G3) groups with 12-hour fasting

Conditions

Pre-op Gastric Emptying

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

8 hour fasting

A standardized gastric scanning protocol will be used, and patients classified following a 3-point grading system based solely on qualitative sonographic assessment of the antrum in the supine and right lateral decubitus positions. A qualitative assessment of the residual gastric fluid volume will be performed, according to the three-point grading scale previously described by Perlas et al. Grade 0 was defined by the absence of visualization of any content into a flat antrum in both the supine and the right lateral decubitus positions. Grade 1 was defined by the appearance of fluid content in the right lateral decubitus position only, and Grade 2 was defined by the visualization of fluid content in both the supine and the right lateral decubitus positions.

No interventions assigned to this group

10 hour fasting

A standardized gastric scanning protocol will be used, and patients classified following a 3-point grading system based solely on qualitative sonographic assessment of the antrum in the supine and right lateral decubitus positions. A qualitative assessment of the residual gastric fluid volume will be performed, according to the three-point grading scale previously described by Perlas et al. Grade 0 was defined by the absence of visualization of any content into a flat antrum in both the supine and the right lateral decubitus positions. Grade 1 was defined by the appearance of fluid content in the right lateral decubitus position only, and Grade 2 was defined by the visualization of fluid content in both the supine and the right lateral decubitus positions.

No interventions assigned to this group

12 hour fasting

A standardized gastric scanning protocol will be used, and patients classified following a 3-point grading system based solely on qualitative sonographic assessment of the antrum in the supine and right lateral decubitus positions. A qualitative assessment of the residual gastric fluid volume will be performed, according to the three-point grading scale previously described by Perlas et al. Grade 0 was defined by the absence of visualization of any content into a flat antrum in both the supine and the right lateral decubitus positions. Grade 1 was defined by the appearance of fluid content in the right lateral decubitus position only, and Grade 2 was defined by the visualization of fluid content in both the supine and the right lateral decubitus positions.

No interventions assigned to this group

Eligibility Criteria

Inclusion Criteria

Age ≥ 18 yr. ASA physical status I- III Elective surgery

Exclusion Criteria

• Pregnancy
• History of upper gastrointestinal disease or previous surgery on the esophagus, stomach or upper abdomen;
• Documented abnormalities of the upper gastrointestinal tract such as gastric tumors; recent upper gastrointestinal bleeding (within the preceding 1 month).
• Medicines that may delay gastric emptying (e.g., anticholinergic agents, opioid)
• ASA class IV or above
• Unable to understand English
• Cardiac cases with low ejection fraction
• Elderly patients above 65 years of age
• Liver or renal transplant cases
• Type 1 diabetes Patients on insulin or sulphonylurea medication

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Arkansas

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

University of Arkansas for Medical Science

Little Rock, Arkansas, United States

Site Status: RECRUITING

Countries

United States

Central Contacts

Mohamed A Abdeldayem, MD

Role: CONTACT

MAAbdeldayem@uams.edu

Facility Contacts

Mohamed Abdeldayem, MD

Role: primary

MAAbdeldayem@uams.edu

Other Identifiers

287139

Identifier Type: -

Identifier Source: org_study_id