Apparatus and method for measuring blood constituents

Claim 1

An apparatus for non invasive measurement of blood constituents in a living body comprising: (a) energy emitting means for emitting electromagnetic energy at a plurality of predetermined wavelengths; (b) holder means for holding said energy emitting means and directing said electromagnetic energy through an area of living tissue containing flowing blood; (c) detector means for receiving said electromagnetic energy through said area of living tissue and for producing electrical signals in response to receiving said predetermined wavelengths of electromagnetic energy; (d) said detector means also receiving ambient electromagnetic energy and producing an electrical signal in response thereto; (e) signal discriminating means connected to said detector means for separating said electrical signals; (f) storage means connected to said signal discriminating means for storing said separated signals; (g) subtraction means connected to said storage means for subtracting said ambient electrical signal from said predetermined wavelength electrical signals to produce data signals; (h) signal processing means connected to said signal discriminating and signal storage means for amplifying, filtering and conditioning said data signals for further processing; (i) electrical signal conversion means connected to said signal processing means for converting said data signals to digital data signals; (j) first control means connected to said energy emitting means and said signal processing means for controlling said energy emissions; (k) second control means connected to said signal discriminating means and said storage means for controlling said signal separation and storage, to said signal processing means for controlling said signal processing and to said signal conversion means for controlling said signal conversion; (l) programmable digital arithmetic computation processor means connected to said signal conversion means for receiving said digital data signals and connected to said first and second control means for programmed direction of said control means; (m) memory means connected to said digital arithmetic processor means for storing program processes; (n) program processes stored in said memory means for analyzing said digital data signals, for detecting the presence of noise in said signals and for directing said first and second control means whereby said predetermined wavelength electrical signals are produced and received to the exclusion of said ambient electrical signals and said noise; (o) program processes stored in said memory means for calculating from said predetermined wavelength data signals preselected blood constituent levels; and (p) display means connected to said processor means for displaying the results of said preselected blood constituent level calculations.

Claim 2

An apparatus for non invasive measurement of blood constituents in a living body comprising: (a) energy emitting means for emitting electromagnetic energy at a plurality of predetermined wavelengths; (b) holder means for holding said energy emitting means and directing said electromagnetic energy through an area of living tissue containing flowing blood; (c) detector means for receiving said electromagnetic energy through said area of living tissue and for producing electrical signals in response to receiving said predetermined wavelengths of electromagnetic energy; (d) said detector means also receiving ambient electromagnetic energy and producing an electrical signal in response thereto; (e) signal discriminating means connected to said detector means for separating said electrical signals; (f) storage means connected to said signal discriminating means for storing said separated signals; (g) subtraction means connected to said storage means for subtracting said ambient electrical signal from said predetermined wavelength electrical signals to produce data signals; (h) signal processing means connected to said signal discriminating and signal storage means for amplifying, filtering and conditioning said data signals for further processing; (i) electrical signal conversion means connected to said signal processing means for converting said data signals to digital data signals; (j) first control means connected to said energy emitting means and said signal processing means for controlling said energy emissions; (k) second control means connected to said signal discriminating means and said storage means for controlling said signal separation and storage, to said signal processing means for controlling said signal processing and to said signal conversion means for controlling said signal conversion; (l) programmable digital arithmetic computation processor means connected to said signal conversion means for receiving said digital data signals and connected to said first and second control means for programmed direction of said control means; (m) memory means connected to said digital arithmetic processor means for storing program processes; (n) program processes stored in said memory means for analyzing said digital data signals, for detecting the presence of noise in said signals and for directing said first and second control means whereby said predetermined wavelength electrical signals are produced and received to the exclusion of said ambient electrical signals and said noise; (o) program processes stored in said memory means for calculating from said predetermined wavelength data signals preselected blood constituent levels; and (p) display means connected to said processor means for displaying the results of said preselected blood constituent level calculations.

Claim 5

An apparatus for non invasive measurement of blood constituents in a living body comprising: (a) energy emitting means for emitting electromagnetic energy at a plurality of predetermined wavelengths; (b) holder means for holding said energy emitting means and directing said electromagnetic energy through an area of living tissue containing flowing blood; (c) detector means for receiving said electromagnetic energy through said area of living tissue and for producing electrical signals in response to receiving said predetermined wavelengths of electromagnetic energy; (d) said detector means also receiving ambient electromagnetic energy and producing an electrical signal in response thereto; (e) signal discriminating means connected to said detector means for separating said electrical signals; (f) signal sampling and storage means connected to said signal discriminating means for sampling and storing said separated signals; (g) subtraction means connected to said storage means for subtracting said ambient electrical signal from said predetermined wavelength electrical signals to produce data signals; (h) signal processing means connected to said signal discriminating and signal storage means for amplifying, filtering and conditioning said data signals for further processing; (i) electrical signal conversion means connected to said signal processing means for converting said data signals to digital data signals; (j) first control means connected to said energy emitting means and said signal processing means for controlling said energy emissions; (k) second control means connected to said signal discriminating means and said storage means for controlling said signal separation and storage to said signal processing means for controlling said signal processing and to said signal conversion means for controlling said signal conversion; (l) programmable digital arithmetic computation processor means connected to said signal conversion means for receiving said digital data signals and connected to said first and second control means for programmed direction of said control means; (m) memory means connected to said digital arithmetic processor means for storing program processes; (n) program processes stored in said memory means for analyzing said digital data signals, for detecting the presence of noise in said signals and for directing said first and second control means whereby said predetermined wavelength electrical signals are produced and received to the exclusion of said ambient electrical signals and said noise; (o) program processes stored in said memory means for calculating from said predetermined wavelength data signals preselected blood constituent levels; and (p) program processes stored in said memory means for selecting said predetermined wavelength data signals so as to suppress the Traube-Herring effect and calculating said preselected blood constituent levels from said selected signals; (q) display means connected to said processor means for displaying the results of said preselected blood constituent level calculations.

Claim 6

An apparatus for non invasive measurement of blood constituents in a living body comprising: (a) energy emitting means for emitting electromagnetic energy at a plurality of predetermined wavelengths; (b) holder means for holding said energy emitting means and directing said electromagnetic energy through an area of living tissue containing flowing blood; (c) detector means for receiving said electromagnetic energy through said area of living tissue and for producing electrical signals in response to receiving said predetermined wavelengths of electromagnetic energy; (d) said detector means also receiving ambient electromagnetic energy and producing an electrical signal in response thereto; (e) signal discriminating means connected to said detector means for separating said electrical signals; (f) signal sampling and storage means connected to said signal discriminating means for sampling and storing said separated signals; (g) subtraction means connected to said storage means for subtracting said ambient electrical signal from said predetermined wavelength electrical signals to produce data signals; (h) signal processing means connected to said signal discriminating and signal storage means for amplifying, filtering and conditioning said data signals for further processing; (i) electrical signal conversion means connected to said signal processing means for converting said data signals to digital data signals; (j) first control means connected to said energy emitting means and said signal processing means for controlling said energy emissions; (k) second control means connected to said signal discriminating means and said storage means for controlling said signal separation and storage to said signal processing means for controlling said signal processing and to said signal conversion means for controlling said signal conversion; (l) programmable digital arithmetic computation processor means connected to said signal conversion means for receiving said digital data signals and connected to said first and second control means for programmed direction of said control means; (m) memory means connected to said digital arithmetic processor means for storing program processes; (n) program processes stored in said memory means for analyzing said digital data signals, for detecting the presence of noise in said signals and for directing said first and second control means whereby said predetermined wavelength electrical signals are produced and received to the exclusion of said ambient electrical signals and said noise; (o) program processes stored in said memory means for calculating from said predetermined wavelength data signals preselected blood constituent levels; and (p) program processes stored in said memory means for selecting said predetermined wavelength data signals so as to suppress the Traube-Herring effect and calculating said preselected blood constituent levels from said selected signals; (q) display means connected to said processor means for displaying the results of said preselected blood constituent level calculations.

Claim 9

An apparatus for non invasive measurement of blood constituents in a living body comprising: (a) energy emitting means for emitting electromagnetic energy at a plurality of predetermined wavelengths; (b) holder means for holding said energy emitting means and directing said electromagnetic energy through an area of living tissue containing flowing blood; (c) detector means for receiving said electromagnetic energy through said area of living tissue and for producing electrical signals in response to receiving said predetermined wavelengths of electromagnetic energy; (d) said detector means also receiving ambient electromagnetic energy and producing an electrical signal in response thereto; (e) signal discriminating means connected to said detector means for separating said electrical signals; (f) storage means connected to said signal discriminating means for storing said separated signals; (g) subtraction means connected to said storage means for subtracting said ambient electrical signal from said predetermined wavelength electrical signals to produce data signals; (h) electrical signal conversion means connected to said signal processing means for converting said data signals to digital data signals; (i) first control means connected to said energy emitting means and said signal processing means for controlling said energy emissions; (j) second control means connected to said signal discriminating means and said storage means for controlling said signal separation and storage to said signal processing means for controlling said signal processing and to said signal conversion means for controlling said signal conversion; (k) programmable digital arithmetic computation processor means connected to said signal conversion means for receiving said digital data signals and connected to said first and second control means for programmed direction of said control means; (l) memory means connected to said digital arithmetic computation processor means for storing program processes; (m) program processes stored in said memory means for analyzing said digital data signals, for detecting the presence of noise in said signals and for directing said first and second control means whereby said predetermined wavelength electrical signals are produced and received to the exclusion of said ambient electrical signals and said noise; (n) program processes stored in said memory means for calculating from said predetermined wavelength data signals preselected blood constituent levels; (o) adaptive filter means connected with said processor means level for evaluating the results of said preselected blood constituent level calculations with respect to the results of previous calculations and determining a value of the quality of the received signals based on such evaluation; and (p) display means connected to said processor means for displaying the results of said preselected blood constituent level calculations, and said signal quality value.

Claim 10

An apparatus for non invasive measurement of blood constituents in a living body comprising: (a) energy emitting means for emitting electromagnetic energy at a plurality of predetermined wavelengths; (b) holder means for holding said energy emitting means and directing said electromagnetic energy through an area of living tissue containing flowing blood; (c) detector means for receiving said electromagnetic energy through said area of living tissue and for producing electrical signals in response to receiving said predetermined wavelengths of electromagnetic energy; (d) said detector means also receiving ambient electromagnetic energy and producing an electrical signal in response thereto; (e) signal discriminating means connected to said detector means for separating said electrical signals; (f) storage means connected to said signal discriminating means for storing said separated signals; (g) subtraction means connected to said storage means for subtracting said ambient electrical signal from said predetermined wavelength electrical signals to produce data signals; (h) electrical signal conversion means connected to said signal processing means for converting said data signals to digital data signals; (i) first control means connected to said energy emitting means and said signal processing means for controlling said energy emissions; (j) second control means connected to said signal discriminating means and said storage means for controlling said signal separation and storage to said signal processing means for controlling said signal processing and to said signal conversion means for controlling said signal conversion; (k) programmable digital arithmetic computation processor means connected to said signal conversion means for receiving said digital data signals and connected to said first and second control means for programmed direction of said control means; (l) memory means connected to said digital arithmetic computation processor means for storing program processes; (m) program processes stored in said memory means for analyzing said digital data signals, for detecting the presence of noise in said signals and for directing said first and second control means whereby said predetermined wavelength electrical signals are produced and received to the exclusion of said ambient electrical signals and said noise; (n) program processes stored in said memory means for calculating from said predetermined wavelength data signals preselected blood constituent levels; (o) adaptive filter means connected with said processor means level for evaluating the results of said preselected blood constituent level calculations with respect to the results of previous calculations and determining a value of the quality of the received signals based on such evaluation; and (p) display means connected to said processor means for displaying the results of said preselected blood constituent level calculations, and said signal quality value.