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US 6,403,944 B1Granted
System for measuring a biological parameter by means of photoacoustic interaction
AssigneeAbbott Laboratories
InventorsHugh Alexander MacKenzie, John Matthew Lindberg
Life of this patent
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Abstract
A system for measuring a biological parameter, such as blood glucose, the system comprising the steps of directing laser pulses from a light guide into a body part consisting of soft tissue, such as the tip of a finger to produce a photoacoustic interaction. The resulting acoustic signal is detected by a transducer and analyzed to provide the desired parameter.
Claims38
An in vivo measuring system for determining a physiological parameter, said system comprising:
- a sensor head comprising a housing, a light transmission means terminating in the housing so as to transmit light energy from at least one light source to a body part along a beam axis, and acoustic transducer means mounted in the housing to receive acoustic waves generated by photoacoustic interaction within the body part, the acoustic transducer means being disposed in the housing to receive the acoustic waves in a direction of high acoustic energy;
- at least one light source coupled with the light transmission means;
- and signal processing means for receiving the output of the acoustic transducer means, the system capable of deriving a measurement of a selected physiological parameter.
Dependencies are inferred from the claim text.