Patents by Inventor Massi E. Kiani

Massi E. Kiani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6714804
    Abstract: An improved pulse oximeter provides for simultaneous, noninvasive oxygen status and photoplethysmograph measurements at both single and multiple sites. In particular, this multiple-site, multiple-parameter pulse oximeter, or “stereo pulse oximeter” simultaneously measures both arterial and venous oxygen saturation at any specific site and generates a corresponding plethysmograph waveform. A corresponding computation of arterial minus venous oxygen saturation is particularly advantageous for oxygen therapy management. An active pulse-inducing mechanism having a scattering-limited drive generates a consistent pulsatile venous signal utilized for the venous blood measurements. The stereo pulse oximeter also measures arterial oxygen saturation and plethysmograph shape parameters across multiple sites.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: March 30, 2004
    Assignee: Masimo Corporation
    Inventors: Ammar Al-Ali, Mohamed K. Diab, Massi E. Kiani, Robert James Kopotic, David Tobler
  • Publication number: 20040059209
    Abstract: An improved pulse oximeter provides for simultaneous, noninvasive oxygen status and photoplethysmograph measurements at both single and multiple sites. In particular, this multiple-site, multiple-parameter pulse oximeter, or “stereo pulse oximeter” simultaneously measures both arterial and venous oxygen saturation at any specific site and generates a corresponding plethysmograph waveform. A corresponding computation of arterial minus venous oxygen saturation is particularly advantageous for oxygen therapy management. An active pulse-inducing mechanism having a scattering-limited drive generates a consistent pulsatile venous signal utilized for the venous blood measurements. The stereo pulse oximeter also measures arterial oxygen saturation and plethysmograph shape parameters across multiple sites.
    Type: Application
    Filed: September 22, 2003
    Publication date: March 25, 2004
    Inventors: Ammar Al-Ali, Mohamed K. Diab, Massi E. Kiani, Robert James Kopotic, David Tobler
  • Publication number: 20040054291
    Abstract: An embodiment of an ear sensor assembly comprises an emitter pad and a detector pad. A clip is configured to removably retain each of the pads. The clip has an open position for placement on an ear tissue site and a closed position for securing the pads to opposite sides of the site. The assembly includes a sensor connector adapted to electrically communicate with a host instrument. A sensor cable has a first end terminating at the pads and a second end terminating at the sensor connector and provides electrical communications between the pads and the connector. In one embodiment, one or more silicone lenses or removable adhesive tabs aid in relieving patient discomfort and pressure necrosis.
    Type: Application
    Filed: July 31, 2003
    Publication date: March 18, 2004
    Inventors: Christian Schulz, Massi E. Kiani, Eugene Mason
  • Patent number: 6684090
    Abstract: An intelligent, rule-based processor provides a pulse indicator designating the occurrence of each pulse in a pulse oximeter-derived photo-plethysmograph waveform. When there is relatively no distortion corrupting the plethysmograph signal, the processor analyzes the shape of the pulses in the waveform to determine where in the waveform to generate the pulse indication. When distortion is present, looser waveform criteria are used to determine if pulses are present. If pulses are present, the pulse indication is based upon an averaged pulse rate. If no pulses are present, no indication occurs. The pulse indicator provides a trigger and amplitude output. The trigger output is used to initiate an audible tone “beep” or a visual pulse indication on a display, such as a vertical spike on a horizontal trace or a corresponding indication on a bar display. The amplitude output is used to indicate data integrity and corresponding confidence in the computed values of saturation and pulse rate.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: January 27, 2004
    Assignee: Masimo Corporation
    Inventors: Ammar Al Ali, Divya S. Breed, Jerome J. Novak, Massi E. Kiani
  • Patent number: 6678543
    Abstract: Embodiments of the present disclosure include an oximeter sensor system including a reusable portion including a substantially rigid connector connected to an end of a cable. The substantially rigid connector includes an electronic element housing at least one electronic component of a probe. The system also includes a disposable portion including a flexible wrap comprising a substantially rigid connection port shaped to receive the substantially rigid connector in a releasably securable manner.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: January 13, 2004
    Assignee: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper, Jr.
  • Publication number: 20030225323
    Abstract: A physiological sensor combination has a flexible substrate configured to attach to a tissue site. Multiple sensors are disposed on the substrate, which generate physiological signals. Each of the signals is responsive to a different physiological parameter. Conductors are carried on the substrate and routed between the sensors and at least one connector. The connector is configured to communicate the physiological signals to at least one monitor, which derives measurements of the parameters.
    Type: Application
    Filed: December 19, 2002
    Publication date: December 4, 2003
    Inventors: Massi E. Kiani, Ammar Al-Ali, Ronald Coverston, Gene Mason, Fred Robertson
  • Publication number: 20030197679
    Abstract: The present disclosure includes a pulse oximeter attachment having an accessible memory. In one embodiment, the pulse oximeter attachment stores calibration data, such as, for example, calibration data associated with a type of a sensor, a calibration curve, or the like. The calibration data is used to calculate physiological parameters of pulsing blood.
    Type: Application
    Filed: April 22, 2003
    Publication date: October 23, 2003
    Inventors: Ammar Al Ali, Don Carothers, David Dalke, Mohamed K. Diab, Julian M. Goldman, Massi E. Kiani, Michael Lee, Jerome Novak, Robert Smith, Val E. Vaden
  • Publication number: 20030156288
    Abstract: A device connects a light emitting device and a detector. The device includes a first securement device attached to the light emitting device, a second securement device attached to the detector, and a band having a first end connected to the first securement device and a second end connected to the second securement device. The band is made of a flexible material and is configured to align the light emitting device with the detector. The device also includes an extender attached to the first securement device and configured to wrap around the band.
    Type: Application
    Filed: February 20, 2002
    Publication date: August 21, 2003
    Inventors: P. T. Barnum, Massi E. Kiani
  • Publication number: 20030139656
    Abstract: The present invention provides a number of improvements that can be incorporated into a pulse oximeter probe to detect when a probe has become dislodged from a patient and/or to prevent a probe-off condition. A probe-off condition occurs when the optical probe becomes partially or completely dislodged from the patient, but continues to detect an AC signal within the operating region of the pulse oximeter. In one aspect, the present invention provides electrical contacts that contact the skin of a patient when the probe is properly attached. In another aspect, the present invention provides a number of louvers placed in front of the sensor's photodetector to filter out oblique light rays that do not originate from a point in front of the detector. Accordingly, if the emitter and photodetector are not properly aligned, the photodetector will not produce a signal within the valid operating range of the pulse oximeter.
    Type: Application
    Filed: February 24, 2003
    Publication date: July 24, 2003
    Inventors: Massi E. Kiani, Mohamed K. Diab
  • Patent number: 6597933
    Abstract: An adapter allows the interconnection of a sensor originating from one manufacturer to be coupled with conventionally incompatible monitors originating from other manufacturers to form a properly functioning pulse oximetry system. The adapter matches a sensor driver in a monitor to the current requirements and light source configuration of a sensor. The adapter also matches a sensor's light detector signal level to the dynamic range requirements of a monitor preamplifier. Further, the adapter provides compatible sensor calibration, sensor type and security information to a monitor. The adapter may have a self-contained power source or it may derive power from the monitor, allowing both passive and active adapter components. The adapter is particular suited as an adapter cable, replacing a conventional patient cable or sensor cable as the interconnection between a sensor to a monitor in a pulse oximetry system.
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: July 22, 2003
    Assignee: Masimo Corporation
    Inventors: Massi E. Kiani, Robert A. Smith, David R. Tobler
  • Patent number: 6584336
    Abstract: A Universal/Upgrading Pulse Oximeter (UPO) comprises a portable unit and a docking station together providing three-instruments-in-one functionality for measuring oxygen saturation and related physiological parameters. The portable unit functions as a handheld pulse oximeter. The combination of the docked portable and the docking station functions as a standalone, high-performance pulse oximeter. The portable-docking station combination is also connectable to, and universally compatible with, pulse oximeters from various manufacturers through use of a waveform generator. The UPO provides a universal sensor to pulse oximeter interface and a pulse oximetry measurement capability that upgrades the performance of conventional instruments by increasing low perfusion performance and motion artifact immunity, for example.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: June 24, 2003
    Assignee: Masimo Corporation
    Inventors: Ammar Al Ali, Don Crothers, David Dalke, Mohamed K. Diab, Julian Goldman, Massi E. Kiani, Michael Lee, Jerome Novak, Robert Smith, Val E. Vaden
  • Patent number: 6542764
    Abstract: A monitor for a pulse oximeter emits audible sounds containing information regarding the patient's pulse rate and oxygen saturation level wherein the information is not contained in variations of the pitch of the audible sounds. By utilizing sets of audible sounds pulsed in synchroneity with the heartbeat of the patient in which the sound volume is a function of the patient's oxygen saturation level, the urgency of the patient's condition is effectively expressed to the monitoring individual. Alternatively, the urgency of the patient's condition is effectively expressed by varying the number of audible sounds in each set of audible sounds, or by varying the volume shape of each audible sound.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: April 1, 2003
    Assignee: Masimo Corporation
    Inventors: Ammar Al-Ali, Massi E. Kiani
  • Patent number: 6526300
    Abstract: The present invention provides a number of improvements that can be incorporated into a pulse oximeter probe to detect when a probe has become dislodged from a patient and/or to prevent a probe-off condition. A probe-off condition occurs when the optical probe becomes partially or completely dislodged from the patient, but continues to detect an AC signal within the operating region of the pulse oximeter. In one aspect, the present invention provides electrical contacts that contact the skin of a patient when the probe is properly attached. In another aspect, the present invention provides a number of louvers placed in front of the sensor's photodetector to filter out oblique light rays that do not originate from a point in front of the detector. Accordingly, if the emitter and photodetector are not properly aligned, the photodetector will not produce a signal within the valid operating range of the pulse oximeter.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: February 25, 2003
    Assignee: Masimo Corporation
    Inventors: Massi E. Kiani, Mohamed K. Diab
  • Publication number: 20030013975
    Abstract: A blood pressure monitor has a noninvasive continuous blood pressure measurement mode and a non-continuous blood pressure measurement mode. At the time of a first sale, the noninvasive continuous blood pressure measurement mode is disabled. Thus, the blood pressure monitor operates only in the non-continuous measurement mode. At a later time, a sensor is sold to generate a sensor signal for noninvasive continuous blood pressure measurements, thereby enabling the continuous measurement mode of the blood pressure monitor.
    Type: Application
    Filed: July 12, 2001
    Publication date: January 16, 2003
    Inventor: Massi E. Kiani
  • Publication number: 20020140675
    Abstract: A sensor, such as, for example, a gravity-responsive sensor, provides an output used to select an orientation of a display of a display device. For example, the output may indicate that the orientation of the display should comprise a portrait or landscape orientation, an orientation rotated, such as, for example, ninety degrees (90°), one hundred and eighty degrees (180°), two hundred and seventy degrees (270°), or the like. In addition, one or more manual switches, buttons, or display icons may be actuated or otherwise selected to manually set the orientation of the display.
    Type: Application
    Filed: May 21, 2002
    Publication date: October 3, 2002
    Inventors: Ammar Al Ali, Don Carothers, David Dalke, Mohamed K. Diab, Julian M. Goldman, Massi E. Kiani, Michael Lee, Jerome Novak, Robert Smith, Val E. Vaden
  • Publication number: 20020082488
    Abstract: An improved pulse oximeter provides for simultaneous, noninvasive oxygen status and photoplethysmograph measurements at both single and multiple sites. In particular, this multiple-site, multiple-parameter pulse oximeter, or “stereo pulse oximeter” simultaneously measures both arterial and venous oxygen saturation at any specific site and generates a corresponding plethysmograph waveform. A corresponding computation of arterial minus venous oxygen saturation is particularly advantageous for oxygen therapy management. An active pulse-inducing mechanism having a scattering-limited drive generates a consistent pulsatile venous signal utilized for the venous blood measurements. The stereo pulse oximeter also measures arterial oxygen saturation and plethysmograph shape parameters across multiple sites.
    Type: Application
    Filed: December 21, 2001
    Publication date: June 27, 2002
    Inventors: Ammar Al-Ali, Mohamed K. Diab, Massi E. Kiani, Robert James Kopotic, David Tobler
  • Patent number: 6397091
    Abstract: The method and apparatus of the present invention provides a system wherein light-emitting diodes (LEDs) can be tuned within a given range by selecting their operating drive current in order to obtain a precise wavelength. The present invention further provides a manner in which to calibrate and utilize an LED probe, such that the shift in wavelength for a known change in drive current is a known quantity. In general, the principle of wavelength shift for current drive changes for LEDs is utilized in order to allow better calibration and added flexibility in the use of LED sensors, particularly in applications when the precise wavelength is needed in order to obtain accurate measurements. The present invention also provides a system in which it is not necessary to know precise wavelengths of LEDs where precise wavelengths were needed in the past. Finally, the present invention provides a method and apparatus for determining the operating wavelength of a light emitting element such as a light emitting diode.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: May 28, 2002
    Assignee: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper, Jr.
  • Publication number: 20020062071
    Abstract: The method and apparatus of the present invention provides a system wherein light-emitting diodes (LEDs) can be tuned within a given range by selecting their operating drive current in order to obtain a precise wavelength. The present invention further provides a manner in which to calibrate and utilize an LED probe, such that the shift in wavelength for a known change in drive current is a known quantity. In general, the principle of wavelength shift for current drive changes for LEDs is utilized in order to allow better calibration and added flexibility in the use of LED sensors, particularly in applications when the precise wavelength is needed in order to obtain accurate measurements. The present invention also provides a system in which it is not necessary to know precise wavelengths of LEDs where precise wavelengths were needed in the past. Finally, the present invention provides a method and apparatus for determining the operating wavelength of a light emitting element such as a light emitting diode.
    Type: Application
    Filed: November 8, 2001
    Publication date: May 23, 2002
    Inventors: Mohamed Kheir Diab, Massi E. Kiani, Charles Robert Ragsdale, James M. Lepper
  • Patent number: RE38476
    Abstract: 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.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: March 30, 2004
    Assignee: Masimo Corporation
    Inventors: Mohamed K. Diab, Massi E. Kiani, Ibrahim M. Elfadel, Rex J. McCarthy, Walter M. Weber, Robert A. Smith
  • Patent number: RE38492
    Abstract: A signal processor which acquires a first signal, including a first desired signal portion and a first undesired signal portion, and a second signal, including a second desired signal portion and a second undesired signal portion, wherein the first and second desired signal portions are correlated. The signals may be acquired by propagating energy through a medium and measuring an attenuated signal after transmission or reflection. Alternatively, the signals may be acquired by measuring energy generated by the medium. A processor generates a noise reference signal which is a combination of only the undesired signal portions and is correlated to both the first and second undesired signal portions. The noise reference signal is then used to remove the undesired portion of each of the first and second measured signals via an adaptive noise canceler, preferably of the joint process estimator type.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: April 6, 2004
    Assignee: Masimo Corporation
    Inventors: Mohamed Kheir Diab, Massi E. Kiani