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Determining normal bolus size for thin liquids.

I Adnerhill, O Ekberg, M E Groher

|January 1, 1989

Summary

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Researchers determined the typical volume of thin liquid swallowed during swallowing assessments. A normal thin liquid bolus volume was found to be 21 ml (SD +/- 5 ml) for radiographic evaluations.

Area of Science:

Radiology
Swallowing Physiology
Medical Imaging

Background:

Accurate assessment of pharyngoesophageal function during swallowing is crucial for diagnosing dysphagia.
Standardized bolus volumes are necessary for reproducible cineradiographic examinations.

Purpose of the Study:

To define a suitable volume of barium for radiographic evaluation of pharyngoesophageal function.
To establish a reference point for normal thin liquid bolus size during swallowing.

Main Methods:

Three age groups of healthy volunteers participated.
Subjects ingested standardized boluses of water, barium, and Coca-Cola.
Bolus volumes were measured during cineradiographic examination.

Main Results:

Related Experiment Videos

The average volume of a normal thin liquid bolus was determined to be 21 ml.
A standard deviation of +/- 5 ml was observed for thin liquid bolus volumes.

Conclusions:

The established normal thin liquid bolus volume of 21 ml serves as a benchmark.
This data will aid in comparing different bolus sizes in patients with swallowing complaints.