| 摘要 |
<p>An intra aural probe is disclosed for monitoring multiple physiological parameters simultaneously. The probe includes a pressure sensor (5), a temperature sensor (7) and a light sensor (10, 14). The probe is dimensioned to fit snugly and sealingly within the outer aural cavity and measures blood pressure and pulse rate and volume by detecting contracting and expansion in the vascular bed of the lining tissue of the external auditory canal during the cardiac cycle and measuring respiratory rate and volume by detecting pressure changes across the tympanic membrane or movement of the tympanic membrane induced by corresponding pressure changes in the naso-pharynx and trachea during respiration. The probe also measures temperature in the external auditory canal, measures electroencephalographic voltages or electrocardiographic voltages by measuring small potential differences between the external auditory canal region and a suitable reference position, measures electroencephalographic currents by measuring magnetic flux, and measures changes in oxygen saturation of the haemoglobin travelling in the capillary bed lining the external auditory canal.</p> |
