Improved fibre optic respiratory monitoring using a figure-of-eight coil

School of Life Sciences, Kingston University, Surrey, UK.
Physiological Measurement (Impact Factor: 1.81). 11/2005; 26(5):585-90. DOI: 10.1088/0967-3334/26/5/001
Source: PubMed


The macro-bending loss effect in optical fibres has been used to redevelop a sensor for the measurement of thoracic and abdominal circumferences in non-invasive respiratory monitoring. The new sensor uses a novel figure-of-eight loop configuration, which results in increased linearity of response, less mechanical resistance and hysteresis, as well as other benefits. The performance of the new sensor as applied to respiratory monitoring is examined, and indicates a higher resolution and sensitivity than the old. This enhanced performance enables measurement of respiratory and cardiac function using the same transducing fibre.

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Available from: Julian Mason, Jul 16, 2014
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    • "Similar principles have been reported and a summary presented in [19]. Augousti et al. proposed a respiratory analysis by means of macro bending loss effects [21,22]. Although most of the published work dealing with textile-based breathing monitoring systems show satisfactory sensing capabilities, their use in a medical environment is still limited by the poor usability of the sensors for the medical staff and the patient [19]. "
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    • "Although this last approach presents some fragility worries, optical fiber sensors are one of the sensor technologies with most potential, when seeking performance and long-term stability [10]. They have proved their performance in a set of applications such as the aeronautics [11] or civil [12], but also in physiological measurements [13]–[15]. The proposition explored in this paper is to achieve a sensing glove simpler than the previous competitors without neglecting its performance, via optical fiber sensors. "
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    • "Measuring systems that monitor respiratory mechanics during breathing in real-time are becoming increasingly important in various fields of medicine. The measurements with standard methods and instruments such as plethysmographs [1], magnetometers [2] [3], stretching belts [4], and fiber optics [5] are mostly limited due to the invasiveness and its difficulty to use them in some measurement setups. Such devices also interfere with voluntary breathing and can consequently change the breathing pattern, therefore making volume measurements inaccurate. "

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