Breath Analysis Using a Time‐of‐Flight Camera and Pressure Belts

Abstract

The proper way of breathing is important for everyone. Healthy people often do not follow respiration until breathing problems start-during stress or during sport activity in physiological cases. More serious cases are stroke, injury, or surgery of the chest and others. So, learning to breathe correctly and/or breathing diagnosis is considerable for many reasons. Two novel methods of breath analysis suitable for diagnostics and rehabilitation are presented. The first technique utilizes pressure belts fastened to the patient's belly and chest, and the second method relies on a SwissRanger SR-4000 time-of-flight camera. The measurement principles are described together with the advantages and disadvantages of the applied techniques. The SwissRanger camera depth calibration is proposed to facilitate better results during the breath analysis. The methods are tested on a group of students to provide a comparison of their individual performances. As it was demonstrated, presented methods proved to work reliably. The method based on time-of-flight camera seems to be more suitable for diagnosis, while the method based on pressure belts is more suitable for rehabilitation and biofeedback applications.

Novel wearable and contactless monitoring devices to identify deteriorating patients in the clinical setting: a systematic review protocol

“…Novel vital sign monitoring devices can be classified into either the wearable/contact or contactless space, with the former typically disposable sensors applied via adhesive [24], contained in a smaller device in direct contact with the body [25,26] or in near or direct proximity to the patient via mattress or bedsheet using ballistography [27] or electrical bioimpedence [28]. Contactless devices can be divided into image and nonimage based systems, with image-based systems typically employing RGB or infrared cameras, whereas non-image based systems have typically employed modalities including time of flight sensors [29,30], acoustics [31], and radar [32,33]. While many new devices make claims of the ability to monitor patients for illness [34], there appears to be very little literature documenting their effectiveness in the unwell, let alone patients that are deteriorating.…”

Herramientas tecnológicas para la medición y registro de movimiento objetivo de la hiperactividad

“…Una de las grandes ventajas de este dispositivo es su elevada precisión y frecuencia de muestreo. Por este motivo se ha utilizado para realizar investigaciones en campos tan diversos como el deporte [39], la rehabilitación [40], el reconocimiento de gestos [41], etc. Sin embargo, su elevado precio que ronda los 4000$ no lo hace asequible para todos los proyectos.…”