Leadless monitoring of physiological conditions
First Claim
1. A device for monitoring a physiological condition of a patient, comprising:
- a transducer adapted to sense the physiological condition of the patient at a location external to the patient'"'"'s body and to produce an output signal indicative thereof;
at least one transducer carrier, supporting the transducer, adapted to be secured to an external surface of the patient'"'"'s skin; and
a transponder arranged to wirelessly receive an electromagnetic signal and to re-radiate the electromagnetic signal, wherein the re-radiated electromagnetic signal is modulated in response to the output signal of the transducer.
5 Assignments
0 Petitions
Accused Products
Abstract
A signal representing a physiological condition of a patient is used to modulate an electromagnetic signal received by a transponder so that a modulated electromagnetic signal representative of the signal is re-radiated by the transponder. The transponder includes an antenna and a diode coupled between the antenna and ground. Changing states of a digital signal from an analog-to digital converter that receives an input from a physiological transducer cause the diode to selectively conduct, which causes the impedance of the antenna to change accordingly. The re-radiated electromagnetic signal is demodulated to recover the digital signal, and the output signal of the transducer is recovered and may be displayed to a user and otherwise processed and/or stored.
195 Citations
25 Claims
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1. A device for monitoring a physiological condition of a patient, comprising:
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a transducer adapted to sense the physiological condition of the patient at a location external to the patient'"'"'s body and to produce an output signal indicative thereof; at least one transducer carrier, supporting the transducer, adapted to be secured to an external surface of the patient'"'"'s skin; and a transponder arranged to wirelessly receive an electromagnetic signal and to re-radiate the electromagnetic signal, wherein the re-radiated electromagnetic signal is modulated in response to the output signal of the transducer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for monitoring a physiological condition of a patient, comprising:
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a transmitter configured to emit an electromagnetic; a transducer adapted to sense the physiological condition of the patient at a location external to the patient'"'"'s body and to produce an output signal indicative thereof; at least one transducer carrier, supporting the transducer, adapted to be secured to an external surface of the patient'"'"'s skin; a transponder arranged to wirelessly receive the electromagnetic signal emitted by the transmitter and to re-radiate the electromagnetic signal, wherein the re-radiated electromagnetic signal is modulated in response to the output signal of the transducer; and a receiver configured to wirelessly receive the electromagnetic signal re-radiated by the transponder. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method for monitoring a physiological condition of a patient, comprising steps of:
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(a) sensing the physiological condition of the patient at a location external to the patient'"'"'s body and producing an output signal indicative thereof; (b) wirelessly receiving an electromagnetic signal; (c) modulating the electromagnetic signal in response to the output signal to produce a modulated electromagnetic signal; and (d) re-radiating the modulated electromagnetic signal. - View Dependent Claims (19, 20, 21)
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22. A method for monitoring a physiological condition of a patient, comprising steps of:
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using a transmitter to transmit an electromagnetic signal; sensing the physiological condition of the patient at a location external to the patient'"'"'s body and producing an output signal indicative thereof; using a wireless device, distinct from the transmitter, to wirelessly receive the electromagnetic signal transmitted by the transmitter; modulating the electromagnetic signal received by the wireless device in response to the output signal to produce a modulated electromagnetic signal; using the wireless device to re-radiate the modulated electromagnetic signal; and using a receiver, distinct from the wireless device, to wirelessly receive the modulated electromagnetic signal. - View Dependent Claims (23, 24, 25)
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Specification