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Related Experiment Videos

A new device for ambulatory cough recording

P Munyard1, C Busst, R Logan-Sinclair

  • 1Department of Paediatrics, Royal Brompton National Heart and Lung Hospital, London, England.

Pediatric Pulmonology
|September 1, 1994
PubMed
Summary

A new portable device, the RBC-7, objectively records coughs using electromyographic (EMG) and audio signals over 24 hours. This overcomes limitations of subjective cough diaries, providing reliable daytime cough data.

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Area of Science:

  • Respiratory Medicine
  • Biomedical Engineering
  • Medical Devices

Background:

  • Subjective reporting of daytime cough is potentially unreliable, similar to nocturnal cough diaries.
  • Objective measurement of cough is needed to overcome the limitations of patient-reported outcomes.
  • Existing methods for cough monitoring have limitations in duration and objectivity.

Purpose of the Study:

  • To develop and validate a new portable device (RBC-7) for objective, multiparametric cough monitoring.
  • To assess the reliability and feasibility of the RBC-7 for ambulatory cough recording.
  • To compare the performance of the RBC-7 with conventional tape recorders for cough signal detection.

Main Methods:

  • Development of the RBC-7 device, integrating electromyographic (EMG), audio, electrocardiographic (ECG), and accelerometer signals.

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  • Optimization of EMG lead and microphone placement for maximal signal quality and patient comfort.
  • Simultaneous 24-hour ambulatory recordings in 20 subjects using the RBC-7 and conventional tape recorders.

    • Main Results:

    • The RBC-7 device successfully recorded cough signals objectively over a 24-hour period.
    • Optimal positions for EMG leads and microphone were identified for enhanced signal detection.
    • No significant difference was found in the number of single coughs detected by the RBC-7 compared to conventional tape recorders (correlation coefficient = 0.996).

    Conclusions:

    • The RBC-7 provides a reliable and objective method for assessing cough in ambulatory subjects.
    • This device allows for the correlation of cough events with time, activity, and heart rate.
    • The RBC-7 overcomes the limitations of subjective cough reporting, offering a valuable tool for clinical research and practice.