Methods and devices for central photoplethysmographic monitoring methods
First Claim
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1. A method of monitoring blood flow status to the head of an individual, said method comprising:
- securing a pulse oximeter probe to a central source site of said individual and generating a plethysmography waveform;
extracting an isolated DC component waveform from said plethysmography waveform with a signal processor;
monitoring blood flow at said central source site by continuously monitoring changes in said isolated DC component waveform over time; and
effecting a predetermined reaction responsive to said blood flow falling below a predefined value.
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Abstract
Disclosed herein are methods and devices for delivering gas to a subject and obtaining plethysmograph readings from a subject. Specifically disclosed herein are masks and helmets which comprise one or more pulse oximeter probes associated therewith. The masks and helmets may be used in particular contexts, including, but not limited to, emergency responder personnel, pilots or subjects of medical attention.
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Citations
29 Claims
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1. A method of monitoring blood flow status to the head of an individual, said method comprising:
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securing a pulse oximeter probe to a central source site of said individual and generating a plethysmography waveform; extracting an isolated DC component waveform from said plethysmography waveform with a signal processor; monitoring blood flow at said central source site by continuously monitoring changes in said isolated DC component waveform over time; and effecting a predetermined reaction responsive to said blood flow falling below a predefined value. - View Dependent Claims (2, 3, 5, 6)
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4. The method of claim l wherein said reaction comprises directing flight control systems of an aircraft to undertake a corrective flight maneuver.
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7. A system for monitoring blood flow status of a subject comprising
a pulse oximeter probe that secures to a central source site of said subject and generates a plethysmography waveform; -
a signal processor in communication with said pulse oximeter probe, wherein said signal processor extracts an isolated DC component waveform from said plethysmography waveform and sustains said isolated DC component waveform and, optionally, an isolated AC component waveform; and an analyzer unit in communication with said signal processor, wherein said analyzer unit monitors blood flow by continuously evaluating changes in said isolated DC component waveform and, optionally, said isolated AC component waveform, over time.
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8. A system for monitoring blood flow comprising
a mask that delivers gas to a subject, said mask comprising a compartment that covers the nose and/or mouth of said subject and an airhose attached to said compartment; - and
a pulse oximeter probe that secures to a central source site of said subject and generates a plethysmography waveform, said pulse oximeter probe associated with said mask, a signal processor in communication with said pulse oximeter probe that extracts an isolated DC component waveform from said plethysmography waveform and sustains said isolated DC component waveform and, optionally, an isolated AC component waveform; and an analyzer unit in communication with said signal processor, wherein said analyzer unit monitors blood flow by continuously evaluating changes in said isolated DC component waveform and, optionally, said isolated AC component waveform, over time. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for monitoring signals indicative of blood flow at least one central source site of at least one subject, said system comprising
a mask that delivers gas to said subject; -
at least one pulse oximeter probe that secures to a central source site of said subject and generates a plethysmography waveform; and a remote monitoring computer communicatingly connected with said at least one pulse oximeter probe, wherein said remote monitoring computer processes said plethysmography waveform, wherein said remote monitoring computer extracts an isolated DC component waveform, and monitors blood flow by continuously evaluating changes in said isolated DC component waveform over time. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. A mask for delivering gas to a subject, said mask comprising
a nasal delivery portion; -
at least one projection associated with said nasal delivery portion that inserts into at least one nasal passage; an airhose associated with said nasal delivery portion; and a pulse oximeter probe that secures to a central source site of said subject, said pulse oximeter probe associated with said mask, a signal processor in communication with said pulse oximeter probe that extracts an isolated DC component waveform from said plethysmography waveform and sustains said isolated DC component waveform and, optionally, an isolated AC component waveform; and an analyzer unit in communication with said signal processing unit, wherein said analyzer unit monitors blood flow by continuously evaluating changes in said isolated DC component waveform and, optionally, said AC component waveform, over time. - View Dependent Claims (28, 29)
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Specification