Non-invasive cardiorespiratory monitor with synchronized bioimpedance sensing
First Claim
1. A method of sensing bioimpedance, the method comprising:
- detecting impedance sensing signals generated by a first device;
determining timing between the impedance sensing signals generated by the first device for a bioimpedance sensing signal to be generated by a second device; and
delivering the bioimpedance sensing signal by the second device.
0 Assignments
0 Petitions
Accused Products
Abstract
A cardiorespiratory monitor that generates bioimpedance sensing signals that produce substantially no interference with bioimpedance signals generated by implanted devices. The monitor detects the bioimpedance signal generated by the implanted device, using a voltage detector or a telemetry circuit, for example. The monitor analyzes this detected signal to generate a bioimpedance sensing signal that will not interfere with the sensed signal. For instance, if the monitor produces a pulsed sensing signal, the pulses are delivered in an interval of the detected signal where no pulses are present. Similarly, if the monitor produces a high frequency AC sensing signal, the zero crossings of the AC sensing signal are positioned during the delivery of a pulse by the implanted device.
118 Citations
25 Claims
-
1. A method of sensing bioimpedance, the method comprising:
-
detecting impedance sensing signals generated by a first device;
determining timing between the impedance sensing signals generated by the first device for a bioimpedance sensing signal to be generated by a second device; and
delivering the bioimpedance sensing signal by the second device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method, comprising:
-
detecting a first bioimpedance sensing signal in a body; and
analyzing the detected first bioimpedance signal to determine a time for delivery of a further bioimpedance signal such that the bioimpedance signals do not significantly interfere with each other. - View Dependent Claims (10, 11, 12, 13)
receiving the bioimpedance sensing signals delivered by the second device;
receiving an ECG signal; and
processing the received bioimpedance sensing signals and the ECG signal to provide at least one of a numerical value of heart rate, stroke volume, cardiac output and minute ventilation.
-
-
14. A method, comprising:
-
detecting a first signal corresponding to bioimpedance sensing signal; and
analyzing the first signal to determine a time for delivery of a further bioimpedance signal such that the bioimpedance signals do not significantly interfere with each other. - View Dependent Claims (15, 16, 17)
-
-
18. A device, comprising:
-
a monitor that detects impedance sensing signals in a torso; and
a circuit that senses impedance in the torso between the impedance sensing signals. - View Dependent Claims (19, 20, 21, 22, 23)
-
-
24. A system, comprising:
-
a torso implanted pacemaker that generates bioimpedance sensing signals;
a monitor that detects the bioimpedance sensing signals in the torso; and
a circuit that senses bioimpedance in the torso between the bioimpedance sensing signals. - View Dependent Claims (25)
-
Specification