Ultrasound Assessment of Gastric Emptying in Mechanically Ventilated ICU Patients

This prospective observational study aims to evaluate dynamic changes in gastric volume and gastric emptying time using bedside gastric ultrasound in mechanically ventilated intensive care unit patients. The study compares gastric emptying patterns among patients receiving different types of enteral nutrition solutions as part of routine clinical care.

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Key information

Conditions

Gastric Ultrasound

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Sancaktepe Şehit Prof. Dr. İlhan Varank Training and Research Hospital

Istanbul, 34000, Turkey (Türkiye)

About this study

This prospective observational study is designed to evaluate gastric emptying and changes in gastric volume using bedside gastric ultrasound in mechanically ventilated intensive care unit patients. Ultrasound examinations will be performed at predefined time points to assess gastric residual volume and gastric emptying patterns.

Patients receiving different types of enteral nutrition solutions as part of routine clinical care will be evaluated and compared. Gastric measurements will be obtained using standardized ultrasound techniques by trained clinicians.

The study aims to identify differences in gastric emptying dynamics associated with various enteral nutrition formulations and to assess the feasibility of bedside ultrasound as a non-invasive tool for monitoring gastric function in critically ill patients.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Age 18 years or older
Mechanically ventilated patients admitted to the intensive care unit
Presence of a nasogastric tube
Hemodynamically stable patients receiving enteral nutrition as part of routine clinical care

Exclusion criteria

Recent abdominal surgery within the first 24 hours
Major abdominal trauma or burns
Significant ascites
Inadequate ultrasound window (e.g., severe meteorism)
Hemodynamic instability
Contraindication to enteral nutrition

Treatment and study plan

Enteral Nutrition (Routine Clinical Care)

Other

Enteral nutrition administered according to routine clinical practice without protocol-driven assignment or modification.

Primary outcomes

Change in Gastric Volume Estimated by Ultrasound

Time frame: Baseline and up to 60 minutes after enteral feeding

Dynamic changes in gastric volume estimated using ultrasound-derived antral cross-sectional area measurements at predefined time points before and after enteral feeding.

Sponsors and collaborators

Lead sponsor

Sehit Prof. Dr. Ilhan Varank Sancaktepe Training and Research Hospital

Other

Registry information

Official study title

Evaluation of Gastric Emptying and Residual Volume Using Ultrasound in Mechanically Ventilated Intensive Care Patients Receiving Different Enteral Nutrition Solutions

Acronym: GASTRIC-USG

Important dates

Study start: 2025
Primary completion: 2026
Study completion: 2026
First posted: Jan 20, 2026
Registry last updated: May 20, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed