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Related Experiment Videos

The tussometer: accuracy and reproducibility

P Singh1, G E Murty, R P Mahajan

  • 1University Department of Anaesthesia, Queen's Medical Centre, Nottingham.

British Journal of Anaesthesia
|August 1, 1994
PubMed
Summary

Tussometry offers a new, non-invasive method to objectively measure laryngeal function using cough airflow. This technique, analyzing cough peak flow rate (CPFR) and peak velocity time (PVT), shows reproducible results for assessing vocal cord function.

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Area of Science:

  • Laryngology
  • Respiratory Physiology
  • Medical Instrumentation

Background:

  • Laryngeal function assessment traditionally relies on subjective measures.
  • Objective, non-invasive techniques are needed for accurate laryngeal function evaluation.
  • Cough manoeuvre analysis offers a potential objective method.

Purpose of the Study:

  • To introduce and describe tussometry, a novel non-invasive technique.
  • To present the calibration data and assess the reproducibility of tussometry.
  • To evaluate the impact of mask size on tussometry readings.

Main Methods:

  • Tussometry utilizes airflow waveform analysis during a maximum voluntary cough.
  • Calibration was performed using a flowmeter with +/- 1.75% accuracy up to 1100 L/min.

Related Experiment Videos

  • Reproducibility of cough peak flow rate (CPFR) and peak velocity time (PVT) was assessed.

    • Main Results:

    • Tussometry measurements (CPFR and PVT) demonstrated good reproducibility.
    • Within-subject variability for CPFR was 23.9%, and for PVT was 9%.
    • No inter-observer variation was observed; mask size did not affect readings with an adequate seal.

    Conclusions:

    • Tussometry is a reproducible and objective method for assessing laryngeal function.
    • The technique is not influenced by mask size, provided a proper seal is achieved.
    • Tussometry holds promise as a valuable tool in laryngology and respiratory diagnostics.