Walter Christian Weber

6430525, Aug 6, 2002

Jun 5, 2000

09/586845

Walter M. Weber - Laguna Hills CA
Ammar Al-Ali - Tustin CA

Masimo Corporation - Irvine CA

H03H 1700

702194, 702191

A signal processor generates an estimate of a block of weighted input values. An adjustable mode parameter determines a time point relative to the input values at which the estimate is computed. By varying the mode parameter, the output characteristics of the processor are variable between that of a smoother, a filter and a forward predictor of the input values. When input signal confidence is low, the mode parameter is adjusted so that the processor smoothes the input signal. When input signal confidence is high, the mode parameter is adjusted so that the processor output has a faster and more accurate response to the input signal. The variable mode averager is particular applicable to the monitoring of critical physiological parameters in patient-care settings. When applied to pulse oximeter oxygen saturation measurements, the mode parameter can be varied in real-time to achieve a tradeoff between the suppression of false alarms and signal artifacts and the immediate detection of life threatening oxygen desaturation events.

6643530, Nov 4, 2003

Dec 13, 2000

09/735960

Mohamed K. Diab - Mission Viejo CA
Walter M. Weber - Laguna Hills CA
Ammar Al-Ali - Costa Mesa CA

Masimo Corporation - Irvine CA

A61B 500

600323, 600336

A method and an apparatus measure blood oxygenation in a subject. A first signal source applies a first input signal during a first time interval. A second signal source applies a second input signal during a second time interval. A detector detects a first parametric signal responsive to the first input signal passing through a portion of the subject having blood therein. The detector also detects a second parametric signal responsive to the second input signal passing through the portion of the subject. The detector generates a detector output signal responsive to the first and second parametric signals. A signal processor receives the detector output signal and demodulates the detector output signal by applying a first demodulation signal to a signal responsive to the detector output signal to generate a first output signal responsive to the first parametric signal. The signal processor applies a second demodulation signal to the signal responsive to the detector output signal to generate a second output signal responsive to the second parametric signal. The first demodulation signal and the second demodulation signal both include at least a first component having a first frequency and a first amplitude and a second component having a second frequency and a second amplitude.

6650917, Nov 18, 2003

Dec 4, 2001

10/005631

Mohamed K. Diab - Laguna Niguel CA
Ibrahim M. Elfadel - Laguna Niguel CA
Rex J. McCarthy - Mission Viejo CA
Walter M. Weber - Los Angeles CA
Robert A. Smith - Corona CA

Masimo Corporation - Irvine CA

A61B 500

600323, 600336

The present invention involves method and apparatus for analyzing two measured signals that are modeled as containing primary and secondary portions. Coefficients relate the two signals according to a model defined in accordance with the present invention. In one embodiment, the present invention involves utilizing a transformation which evaluates a plurality of possible signal coefficients in order to find appropriate coefficients. Alternatively, the present invention involves using statistical functions or Fourier transform and windowing techniques to determine the coefficients relating to two measured signals. Use of this invention is described in particular detail with respect to blood oximetry measurements.

6658276, Dec 2, 2003

Feb 12, 2002

10/076860

Ammar Al-Ali - Tustin CA
Don Carothers - Mission Viejo CA
Michael Lee - Aliso Viejo CA
James Pishney - Orange CA
Walter M. Weber - Dana Point CA

Masimo Corporation - Irvine CA

A61B 500

600322, 600323

A pulse oximetry user interface has a display and a plurality of views each configured to occupy the display. Each of the views are adapted to present data responsive to a physiological signal. A plurality of icons are configured to occupy a portion of the views and adapted to designate the content of the views. Further, a plurality of keys are proximate to the display and correspond to the icons so as to select the icons. One of the views is a pleth view that presents a pulse waveform. Another one of the views is a trend view that presents a trend graph. At least one of the icons can be selected so as to switch the display between the pleth view and the trend view.

RE38476, Mar 30, 2004

Jun 27, 2002

10/185804

Mohamed K. Diab - Mission Viejo CA
Massi E. Kiani - Laguna Niguel CA
Ibrahim M. Elfadel - Mt. Kisco NY
Rex J. McCarthy - North Tustin CA
Walter M. Weber - Laguna Hills CA
Robert A. Smith - Lake Forest CA

Masimo Corporation - Irvine CA

A61B 500

600336, 600481, 600508, 600529

The present invention involves method and apparatus for analyzing two measured signals that are modeled as containing primary and secondary portions. Coefficients relate the two signals according to a model defined in accordance with the present invention. In one embodiment, the present invention involves utilizing a transformation which evaluates a plurality of possible signal coefficients in order to find appropriate coefficients. Alternatively, the present invention involves using statistical functions or Fourier transform and windowing techniques to determine the coefficients relating to two measured signals. Use of this invention is described in particular detail with respect to blood oximetry measurements.

6745060, Jun 1, 2004

Dec 3, 2001

10/006427

Mohamed K. Diab - Laguna Niguel CA
Ibrahim M. Elfadel - Laguna Niguel CA
Rex J. McCarthy - Mission Viejo CA
Walter M. Weber - Los Angeles CA
Robert A. Smith - Corona CA

Masimo Corporation - Irvine CA

A61B 500

600323, 600330, 600336

The present invention involves method and apparatus for analyzing two measured signals that are modeled as containing primary and secondary portions. Coefficients relate the two signals according to a model defined in accordance with the present invention. In one embodiment, the present invention involves utilizing a transformation which evaluates a plurality of possible signal coefficients in order to find appropriate coefficients. Alternatively, the present invention involves using statistical functions or Fourier transform and windowing techniques to determine the coefficients relating to two measured signals. Use of this invention is described in particular detail with respect to blood oximetry measurements.

6999904, Feb 14, 2006

Aug 5, 2002

10/213270

Walter M. Weber - Laguna Hills CA, US
Ammar Al-Ali - Tustin CA, US
Lorenzo Cazzoll - Barcelona, ES

Masimo Corporation - Irvine CA

A61B 5/00

702189, 702190, 600310, 600322, 600330, 600336

A variable indication estimator which determines an output value representative of a set of input data. For example, the estimator can reduce input data to estimates of a desired signal, select a time, and determine an output value from the estimates and the time. In one embodiment, the time is selected using one or more adjustable signal confidence parameters determine where along the estimates the output value will be computed. By varying the parameters, the characteristics of the output value are variable. For example, when input signal confidence is low, the parameters are adjusted so that the output value is a smoothed representation of the input signal. When input signal confidence is high, the parameters are adjusted so that the output value has a faster and more accurate response to the input signal.

7003338, Feb 21, 2006

Jul 8, 2003

10/615333

Walter M. Weber - Laguna Hills CA, US
Ammar Al-Ali - Costa Mesa CA, US

Masimo Corporation - Irvine CA

A61B 5/00

600336, 600323

A method and an apparatus for separating a composite signal into a plurality of signals is described. A signal processor receives a composite signal and separates a composite signal in to separate output signals. Feedback from one or more of the output signals is provided to a configuration module that configures the signal processor to improve a quality of the output signals. In one embodiment, the signal processor separates the composite signal by applying a first demodulation signal to the composite signal to generate a first output signal. In one embodiment, the signal processor also applies a second demodulation signal to the composite signal to generate a second output signal. In one embodiment, a phase and/or amplitude of the first demodulation signal and a phase and/or amplitude of the second demodulation signal are selected to reduce crosstalk. In one embodiment, the composite signal is obtained from a detector in a system for measuring one or more blood constituents.