SYSTEM AND METHOD FOR NON-INVASIVE INSTANTANEOUS AND CONTINUOUS MEASUREMENT OF CARDIAC CHAMBER VOLUME.
First Claim
1. A medical device for determining a change in the spatial configuration of a heart, comprising:
- at least one antenna adapted to be located adjacent a portion of the heart; and
a sensing unit capable of resolving a change in reflected signals, wherein said sensing unit of the medical device is capable of resolving a change in reflected signals that are functionally related to a change in cardiac ventricular volume.
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Accused Products
Abstract
A system and method for non-invasive and continuous measurement of cardiac chamber volume and derivative parameters including stroke volume, cardiac output and ejection fraction comprising an ultrawideband radar system having a trans-mitting and receiving antenna for applying ultrawideband radio signals to a target area of a subject'"'"'s anatomy wherein the receiving antenna collects and transmits signal returns from the target area which are then delivered to a data processing unit, such as an integrated processor or PDA, having software and hardware used to process the signal returns to produce a value for cardiac stroke volume and changes in cardiac stroke volume supporting multiple diagnostic requirements for emergency response and medical personnel whether located in the battlefield, at a disaster site or at a hospital or other treatment facility.
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Citations
49 Claims
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1. A medical device for determining a change in the spatial configuration of a heart, comprising:
- at least one antenna adapted to be located adjacent a portion of the heart; and
a sensing unit capable of resolving a change in reflected signals, wherein said sensing unit of the medical device is capable of resolving a change in reflected signals that are functionally related to a change in cardiac ventricular volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- at least one antenna adapted to be located adjacent a portion of the heart; and
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11. A medical device, comprising:
- a sensing unit including a control unit, a radar transceiver, and at least one antenna, said at least one antenna being adapted to be located adjacent a portion of a heart to measure dynamic motion of a targeted portion of the heart.
- View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
- 20. A non-invasive system for determining dynamic physiologic and structural anatomic data from a subject comprising an ultrawideband radar system having at least one transmitting and receiving antenna for applying ultrawideband signals to a target area of the subject'"'"'s anatomy wherein said receiving antenna collects and transmits signal returns from said target area which are then delivered to a data processing and control unit having software and hardware used to process said signal returns to produce a value for said dynamic physiologic and structural anatomic data.
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27. A method for determining changes in cardiac chamber volume in a body wherein an ultrawideband medical radar transceiver, including a transmitter and a receiver and a signal processor integrated with software elements in conjunction with a central processing unit are used according to the following steps:
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a. said transceiver transmits a series of electromagnetic pulses into a body; b. said electromagnetic impulses encounter a boundary between different biological substances in the body; c. small amounts of incident energy from said electromagnetic pulses encountering the boundary are reflected back towards said receiver as raw reflections where said raw reflections are captured and pre-processed by said receiver; d. said receiver captures a plurality of said raw reflections using a high speed sample and hold circuit where capture time for a sample of said raw reflections is set equal to a round trip time of flight from said transmitter to one or more depth ranges of interest and back to said receiver; e. said plurality of sampled reflections from said depth ranges of interest are integrated to form an integrated signal; f. said integrated signal is filtered to minimize irrelevant high frequency noise so as to avoid corruption of desired data related to tracking instantaneous cardiac chamber volume; g. said integrated signal is amplified and passed through a low-pass filter to prevent signal aliasing prior to digitization; h. a predetermined number of reflections for a first range of interest are collected and integrated, i. said receiver sample timing is changed and reflections from a next range of interest are captured, j. said steps a through i repeated until reflections from an entire range of interest across the cardiac chamber are collected, k. said step j is then continually repeated to deliver an updated instantaneous measure of cardiac volumetric changes. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
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- 46. A non-invasive system for determining dynamic physiologic and structural anatomic data from a subject comprising an ultrawideband radar system having a transmitting and receiving antenna for applying ultrawideband signals to a target area of a subject'"'"'s anatomy wherein said receiving antenna collects signal returns from said target area which are then delivered to a data processing and control unit having software and hardware used to process said signal returns to produce a value for cardiac stroke volume and changes in cardiac stroke volume supporting multiple diagnostic requirements.
Specification