Ultrasonography Assessment of Gastric Volume in Healthy Volunteers after Ingestion of Clear Liquids and Solid Food


About this study

The study will assess whether protein-containing clear liquids have similar gastric emptying time as carbohydrate-based clear liquids.Some commercially available beverages have been advertised as clear liquids yet contains whey protein isolates.These protein-containing clear liquids can be easily confused as carbohydrate-based clear liquids by the patients.However, the gastric emptying time the protein-containing liquids has not been established.The study will assess specific sonographic characteristics of stomach containing solid food.The study will assess if a novice ultrasonographer is able to reproduce the results of gastric contents and volume as an experienced ultrasonographer.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

  • Healthy volunteers
  • Age > or = 18 years old
  • BMI <40

Exclusion Criteria: 

  • History of Diabetes Mellitus
  • History of abdominal surgery involving stomach and intestines
  • Dysphagia
  • Allergy to any ingredients of apple juice, Boost Breeze, or cheese pizza

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status

Jacksonville, Fla.

Mayo Clinic principal investigator

Sher-Lu Pai, M.D.

Closed for enrollment

More information


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Additional contact information

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