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Related Experiment Videos

Oropharyngeal volumes.

G N Newcombe1, W J Russell

  • 1Department of Anaesthesia, Lyell McEwin Health Service, Elizabeth Vale, South Australia.

Anaesthesia
|December 1, 1989
PubMed
Summary

Mouth and pharynx volumes in adults were measured, revealing a median of 87 ml. Suction equipment for vomit removal should have a minimum 500 ml capacity to accommodate normal population variations.

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Area of Science:

  • Anatomy
  • Medical Engineering

Background:

  • Accurate measurement of oral and pharyngeal volumes is crucial for medical device design.
  • Understanding anatomical variations is key to ensuring patient safety during emergency procedures.

Purpose of the Study:

  • To determine the volume of the mouth and pharynx in adult cadavers.
  • To provide data for the design of effective vomit collection systems.

Main Methods:

  • Twenty adult cadavers were used for volumetric measurements.
  • Statistical analysis included median, mean, and geometric mean calculations.
  • Population volume estimations were performed using Gaussian and log-normal distribution models.

Main Results:

  • The measured mouth and pharynx volume ranged from 25 to 202 ml (median: 87 ml).
  • Estimated 99% population volumes were 215 ml (Gaussian) and 342 ml (log-normal).
  • A minimum usable volume of 500 ml is recommended for vomit collection containers.

Conclusions:

  • The anatomical volume of the adult mouth and pharynx necessitates large-capacity collection devices.
  • A 500 ml capacity for suction equipment is recommended to safely manage vomit removal in adults.

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