Respiratory monitoring system

Abstract

To provide a respiration monitoring system capable of evaluating a coordination pattern of swallowing and respiration without disturbing a meal.SOLUTION: A respiration monitoring system is characterized by: specifying a larynx closing start timing and a larynx closing end timing by a larynx movement detection sensor 1; detecting a temperature change of a respiratory air flow from the nostril by a pyroelectric sensor 2 to acquire an output waveform in which one projecting peak point appears in an exhalation period, and the other projecting peak point appears in an inhalation period; detecting from the output waveform, a projecting peak point before swallowing, appearing at first before the larynx closing start timing, and a projecting peak point after swallowing, appearing at first after the larynx closing end timing; determining that the period before the start of larynx closing is the exhalation period, when the projecting peak point before swallowing is one projecting peak point; determining that the period before the start of larynx closing is the inhalation period, when the projecting peak point before swallowing is the other projecting peak point; determining that the period after the end of larynx closing is the exhalation period, when the projecting peak point after swallowing is one projecting peak point; and determining that the period after the end of larynx closing is the inhalation period, when the projecting peak point after swallowing is the other projecting peak point.SELECTED DRAWING: Figure 1

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