Realization of a double biofeedback to control breathing activity

Area of Science:

• Biomedical Engineering
• Respiratory Physiology
• Medical Instrumentation

Background:

• Effective monitoring of respiratory movements is crucial for diagnosing and managing various respiratory conditions.
• Biofeedback systems can enhance patient engagement and control over physiological processes, including breathing.
• Existing methods may lack the ability to provide simultaneous, site-specific feedback on respiratory dynamics.

Purpose of the Study:

• To develop and evaluate a novel biofeedback device capable of generating dual respiratory movement signals.
• To assess the device's utility in providing simultaneous feedback on thoracic and abdominal movements.
• To enable patients to gain real-time control over the relative amplitude of respiratory movements at different body sites.

Main Methods:

• Construction of a biofeedback device utilizing two mercury strain gauge transducers.
• Application of transducers to the thorax and abdomen via belts or direct fixation.
• Conversion of linear electrical resistance changes (proportional to movement) into distinct acoustical signals (air blow and siren).

Main Results:

• The device successfully generated two distinct biofeedback signals corresponding to respiratory movements.
• Signal frequency was directly proportional to the amplitude of movement at each monitored site.
• Patients received simultaneous auditory feedback on respiratory movements from two different locations.

Conclusions:

• The developed biofeedback device offers a new method for monitoring and controlling respiratory movements.
• The system effectively informs patients about the amplitude of breathing at two distinct sites.
• This technology facilitates enhanced patient awareness and voluntary control over respiratory patterns.