1
Steve L Nierlich, Phillip S Palmer, Adnan I Merchant: Medical sensor connector with removable encoding device. Nellcor Puritan Bennett Incorporated, Townsend and Townsend and Crew, August 26, 1997: US05660567 (359 worldwide citation)

A connector for a medical sensor is provided. The connector includes a number of contacts, and includes an electronic device for encoding a characteristic of the medical sensor. The electronic device is insertable into the connector. This simplifies the design of a sensor, which no longer needs to i ...


2
David B Swedlow, Michael J Bernstein, Charles E Porges, James E Luecke, Michael W Nootbaar: Medical diagnostic apparatus with sleep mode. Nellcor Puritan Bennett Incorporated, Townsend and Townsend and Crew, July 20, 1999: US05924979 (272 worldwide citation)

A method and apparatus for conserving power in a medical diagnostic apparatus by using a sleep mode during a monitoring state. The sleep mode allows not only the processor to be put to sleep, but other detection circuitry as well. This is accomplished by not relying on detecting events to awaken the ...


3
Rodney Chin, Paul Mannheimer, Ross Flewelling: Motion compatible sensor for non-invasive optical blood analysis. Nellcor Puritan Bennett Incorporated, Townsend and Townsend and Crew, January 25, 2000: US06018673 (270 worldwide citation)

A non-invasive optical sensor which uses the motion signal to calculate the physiological characteristic being measured. For pulse oximetry, a least squares or a ratio-of-ratios technique can be applied to the motion signal itself. This is made possible by selecting a site on the patient where varia ...


4
Thomas J Yorkey: Method and apparatus for removing artifact and noise from pulse oximetry. Nellcor Puritan Bennett Incorporated, Townsend and Townsend and Crew, July 8, 1997: US05645060 (268 worldwide citation)

Motion compensation is based on analysis of intensity signals received by detectors, without separately measuring a motion signal, without providing feedback to cancel the motion signal and without attempting to mathematically eliminate the motion signal. Instead, the present invention mathematicall ...


5
David B Swedlow, Michael J Bernstein, Charles E Porges, James E Luecke, Michael W Nootbaar: Medical diagnostic apparatus with sleep mode. Nellcor Puritan Bennett Incorporated, Townsend and Townsend & Crew, May 5, 1998: US05746697 (265 worldwide citation)

A method and apparatus for conserving power in a medical diagnostic apparatus by using a sleep mode during a monitoring state. The invention monitors physiological parameters of the patient and enters a sleep mode only after they have been stable for a predetermined period of time. The apparatus is ...


6
Thomas A Berson, Bryan Olson, Michael E Fein, Paul D Mannheimer, Charles E Porges, David Schloemer: Sensor with signature of data relating to sensor. Nellcor Puritan Bennett Incorporated, Townsend and Townsend and Crew, March 16, 2004: US06708049 (245 worldwide citation)

A sensor has codes useful for a monitor which can be authenticated as accurate. The sensor produces a signal corresponding to a measured physiological characteristic and provides codes which can be assured of being accurate and authentic when used by a monitor. A memory associated with the sensor st ...


7
Paul D Mannheimer, Michael E Fein, Charles E Porges: Pulse oximeter sensor with piece-wise function. Nellcor Puritan Bennett Incorporated, Townsend and Townsend and Crew, October 5, 2004: US06801797 (235 worldwide citation)

A memory in a sensor is used to store multiple coefficients for a physiological parameter. In one embodiment, not only are the sensor's specific calibration coefficients stored in a memory in the sensor for the formula to determine oxygen saturation, but multiple sets of coefficients are stored ...


8
Clark R Baker Jr, Thomas J Yorkey: Method and apparatus for estimating physiological parameters using model-based adaptive filtering. Nellcor Puritan Bennett Incorporated, Townsend and Townsend and Crew, July 4, 2000: US06083172 (233 worldwide citation)

A method and apparatus for reducing the effects of noise on a system for measuring physiological parameters, such as, for example, a pulse oximeter. The method and apparatus of the invention take into account the physical limitations on various physiological parameters being monitored when weighting ...


9
Paul F Stetson: Blind source separation of pulse oximetry signals. Nellcor Puritan Bennett Incorporated, Townsend & Townsend & Crew, March 2, 2004: US06701170 (229 worldwide citation)

A method and apparatus for the application of Blind Source Separation (BSS), specifically independent Component Analysis (ICA) to mixture signals obtained by a pulse oximeter sensor. In pulse oximetry, the signals measured at different wavelengths represent the mixture signals, while the plethysmogr ...


10
Michael E Fein, David C Jenkins, Michael J Bernstein, K L Venkatachalam, Adnan I Merchant, Charles H Bowden: Medical sensor with modulated encoding scheme. Nellcor Puritan Bennett Incorporated, Townsend and Townsend and Crew, March 28, 2000: US06044283 (221 worldwide citation)

The present invention provides an encoding mechanism for a medical sensor which uses a modulated signal to provide the coded data to a remote analyzer. The modulated signal could be, for instance, a pulse width modulated signal or a frequency modulated signal. This signal is amplitude independent an ...