US 2008/0076990 A1Published application

Physiological stress detector device and system

AssigneeSPO Medical Equipment Ltd.

InventorsIsrael Sarussi, Yehuda Heimenrath

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Abstract

A method, system and device for measurement of a blood constituent level, including a light source, a light detector proximate an organ surface, adjustable gain amplifiers, and a processor/controller connected within a processing unit operative to separate AC and DC signal components. The device may determine the level of blood constituent, may use this level for monitoring and/or to activate an alarm when the level falls outside a predetermined range, may be applied to monitoring conditions of apnea, respiratory stress, and reduced blood flow in organ regions, heart rate, jaundice, and blood flow velocity, and may be incorporated within a monitoring system.

Claims17

Dependent claims

A non-invasive device for measurement of blood saturation and heart pulse rate, comprising:

a housing unit configured to be worn as a wrist watch, said housing unit comprising:
at least one light source, providing light directed toward the surface of the skin in contact with the wrist watch, the light being reflected from said skin;
a light detector spaced apart from said at least one light source and being sensitive to intensity levels of said reflected light for producing intensity signals in accordance therewith;
and
a processing unit for processing said intensity signals received from said light detector for producing output signals, said processing unit comprising:
first and second amplifiers for amplifying said intensity signals, each in accordance with a respective first and second gain amplification factor;
and
a processor for automatically determining said first and second gain amplification factors in adjustable fashion;
wherein during a first stage, said first and second amplifiers amplify a DC signal component of said intensity signals in accordance with predetermined first and second gain amplification factors, said amplified DC signal component being subtracted from said intensity signals at an input of said first amplifier, to isolate an AC signal component of said intensity signals,
and wherein during a second stage, said second amplifier amplifies said isolated AC signal component in accordance with said adjustably-determined second gain amplification factor,
said processing unit producing output signals in accordance with said isolated AC signal component and said DC signal component and calculating in accordance therewith, at least one blood constituent level.

8 more elements

A system comprising:

a non-invasive device for measurement of blood saturation and heart pulse rate, comprising:
a housing unit configured to be worn as a wrist watch, said housing unit comprising:
at least one light source, providing light directed toward the surface of the skin in contact with the wrist watch, the light being reflected from said skin;
a light detector spaced apart from said at least one light source and being sensitive to intensity levels of said reflected light for producing intensity signals in accordance therewith;
a processing unit for processing said intensity signals received from said light detector for producing output signals;
and
a transmitter configured to transmit said output signals to a receiver at a remote location;
and
a receiver configured to indicate an alert when the blood saturation or heart pulse rate falls outside of a pre-determined range;
wherein said processing unit comprises:
first and second amplifiers for amplifying said intensity signals, each in accordance with a respective first and second gain amplification factor;
and
a processor for automatically determining said first and second gain amplification factors in adjustable fashion;
wherein during a first stage, said first and second amplifiers amplify a DC signal component of said intensity signals in accordance with predetermined first and second gain amplification factors, and wherein the amplified DC signal component is converted by a digital to analog converter to an analog signal and is subtracted from the intensity signals, said amplified DC signal component being subtracted from said intensity signals at an input of said first amplifier, to isolate an AC signal component of said intensity signals,
and wherein during a second stage, said second amplifier amplifies said isolated AC signal component in accordance with said adjustably-determined second gain amplification factor,
said processing unit producing output signals in accordance with said isolated AC signal component and said DC signal component and calculating in accordance therewith, at least one blood constituent level.

13 more elements

A system comprising:

a non-invasive device for measurement of blood saturation and heart pulse rate, comprising:
a housing unit configured to be worn as a wrist watch, said housing unit comprising:
at least one light source, providing light directed toward the surface of the skin in contact with the wrist watch, the light being reflected from said skin;
a light detector spaced apart from said at least one light source and being sensitive to intensity levels of said reflected light for producing intensity signals in accordance therewith;
a processing unit for processing said intensity signals received from said light detector through a signal analog path thereby producing output signals;
and
a transmitter configured to transmit said output signals to a receiver at a remote location;
and
a receiver configured to indicate an alert when the blood saturation or heart pulse rate falls outside of a pre-determined range;
wherein processing the intensity signals is done through a signal analog path, said processing unit comprising:
first and second amplifiers for amplifying said intensity signals, each in accordance with a respective first and second gain amplification factor;
and
a processor for automatically determining said first and second gain amplification factors in adjustable fashion;
wherein during a first stage, said first and second amplifiers amplify a DC signal component of said intensity signals in accordance with predetermined first and second gain amplification factors, said amplified DC signal component being subtracted from said intensity signals at an input of said first amplifier, to isolate an AC signal component of said intensity signals,
and wherein during a second stage, said second amplifier amplifies said isolated AC signal component in accordance with said adjustably-determined second gain amplification factor,
said processing unit producing output signals in accordance with said isolated AC signal component and said DC signal component and calculating in accordance therewith, at least one blood constituent level.

13 more elements

A system comprising:

a non-invasive device for measurement of blood saturation and heart pulse rate, comprising:
a housing unit configured to be worn as a wrist watch, said housing unit comprising:
at least one light source, providing light directed toward the surface of the skin in contact with the wrist watch, the light being reflected from said skin;
a light detector_spaced apart from said at least one light source and being sensitive to intensity levels of said reflected light for producing intensity signals in accordance therewith, said light detector being unaffected by shunted or coupled light from said light source;
a processing unit for processing said intensity signals received from said light detector through a signal analog path thereby producing output signals;
and
a transmitter configured to transmit said output signals to a receiver at a remote location;
and
a receiver configured to indicate an alert when the blood saturation or heart pulse rate falls outside of a pre-determined range;
wherein said processing unit comprises:
first and second amplifiers for amplifying said intensity signals, each in accordance with a respective first and second gain amplification factor;
and
a processor for automatically determining said first and second gain amplification factors in adjustable fashion;
wherein during a first stage, said first and second amplifiers amplify a DC signal component of said intensity signals in accordance with predetermined first and second gain amplification factors, and wherein the amplified DC signal component is converted by a digital to analog converter to an analog signal and is subtracted from the intensity signals, said amplified DC signal component being subtracted from said intensity signals at an input of said first amplifier, to isolate an AC signal component of said intensity signals,
and wherein during a second stage, said second amplifier amplifies said isolated AC signal component in accordance with said adjustably-determined second gain amplification factor,
said processing unit producing output signals in accordance with said isolated AC signal component and said DC signal component and calculating in accordance therewith, at least one blood constituent level.

13 more elements

A non-invasive device for measurement of blood saturation and heart pulse rate, comprising:

a housing unit configured to be worn as a wrist watch, said housing unit comprising:
at least one light source, providing light directed toward the surface of the skin in contact with the wrist watch, the light being reflected from said skin;
a light detector spaced apart from said at least one light source and being sensitive to intensity levels of said reflected light for producing intensity signals in accordance therewith, said light detector being unaffected by shunted or coupled light from said light source;
a processing unit for processing said intensity signals received from said light detector through a signal analog path thereby producing output signals;
wherein processing the intensity signals is done through a signal analog path, said processing unit comprising:
first and second amplifiers for amplifying said intensity signals, each in accordance with a respective first and second gain amplification factor;
and
a processor for automatically determining said first and second gain amplification factors in adjustable fashion;
wherein during a first stage, said first and second amplifiers amplify a DC signal component of said intensity signals in accordance with predetermined first and second gain amplification factors, said amplified DC signal component being subtracted from said intensity signals at an input of said first amplifier, to isolate an AC signal component of said intensity signals,
and wherein during a second stage, said second amplifier amplifies said isolated AC signal component in accordance with said adjustably-determined second gain amplification factor,
said processing unit producing output signals in accordance with said isolated AC signal component and said DC signal component and calculating in accordance therewith, at least one blood constituent level.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/567,232Filed 6 Dec 2006
Priority: 1 Feb 2000
Published: 27 Mar 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

A61B 5/02433
Details of sensor: for infrared radiation
A61B 5/02438
Measuring pulse rate or heart rate: with portable devices, e.g. worn by the patient
A61B 5/0261
Measuring blood flow: using optical means, e.g. infrared light
A61B 5/14551
Using optical sensors, e.g. spectral photometrical oximeters: for measuring blood gases

Family

Application09/147,683Continuation in part · filed 1 Feb 2000
Application10/390,169Continuation · filed 18 Mar 2003
Application11/567,232Continuation
Application10/390,169Continuation in part
US 2003/0229276 A1Published application
US 6,553,242 B1Related patent
US 7,171,251 B2Related patent
US 7,613,490 B2Related patent
US 2008/0076990 A1This patent

From the US filing history. Foreign family members aren’t listed.

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