Wireless communication of physiological variables using spread spectrum
First Claim
1. A system for measuring a physiological variable in a body, which system comprises:
- a sensor (314) arranged to be disposed in the body for measuring the physiological variable and to provide a signal representing the measured physiological variable;
a control unit (322) arranged to be disposed outside the body; and
a wired connection (311) between the sensor and the control unit to provide a supply voltage from the control unit to the sensor, and to communicate said signal from the sensor to the control unit, wherein the control unit has a modulator (301) for modulating a carrier signal with the received signal representing the measured physiological variable and a communication interface (401, 701) for wireless spread spectrum communication of the modulated signal.
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Accused Products
Abstract
The present invention relates to a system and a method of measuring a physiological variable in a body. A basic idea of the present invention is to measure a physiological variable in a body by means of employing a sensor (314) which is arranged to be disposed in the body for measuring the physiological variable. The sensor must be provided with a supply voltage in order to be operable. Therefore, a control unit (322) disposed outside the body provides this supply voltage to the sensor. The control unit also receives, from the sensor, via a wired connection (311), signals that represent the physiological variables that are measured. The control unit is arranged with a communication interface (401, 701) and a modulator (301) for wireless spread spectrum communication of the measured physiological variables for presentation purposes.
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Citations
34 Claims
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1. A system for measuring a physiological variable in a body, which system comprises:
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a sensor (314) arranged to be disposed in the body for measuring the physiological variable and to provide a signal representing the measured physiological variable;
a control unit (322) arranged to be disposed outside the body; and
a wired connection (311) between the sensor and the control unit to provide a supply voltage from the control unit to the sensor, and to communicate said signal from the sensor to the control unit, wherein the control unit has a modulator (301) for modulating a carrier signal with the received signal representing the measured physiological variable and a communication interface (401, 701) for wireless spread spectrum communication of the modulated signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of measuring a physiological variable in a body, which method comprises the steps of:
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measuring the physiological variable by means of a sensor (314) arranged to be disposed in the body;
communicating, via a wired connection (311), a signal representing the measured physiological variable from the sensor to a position outside the body;
supplying, via the wired connection, the sensor with a supply voltage;
modulating (301), at the position outside the body, a carrier signal with the signal that represents the measured physiological variable; and
communicating (701) the modulated signal wirelessly using spread spectrum to a remote position. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification