Patent
Motion compatible sensor for non-invasive optical blood analysis
TLDR
In this paper, it has been determined that a sensor placed on a nail, in particular a thumbnail, exhibits the characteristics of having the red and infrared signals correlated when used for pulse oximetry, and the resulting signals correlate to arterial oxygen saturation.Abstract:
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 variations in motion produce signals of two wavelengths which are sufficiently correlated. In particular, it has been determined that a sensor placed on a nail, in particular a thumbnail, exhibits the characteristics of having the red and infrared signals correlated when used for pulse oximetry, and the resulting signals correlate to arterial oxygen saturation.read more
Citations
More filters
Patent
Signal processing apparatus and method
Mohamed K. Diab,Rex J. McCarthy +1 more
TL;DR: In this article, a method and an apparatus to analyze two measured signals that are modeled as containing desired and undesired portions such as noise, FM and AM modulation are presented, and coefficients relate the two signals according to a model defined in accordance with the present invention.
Patent
Medical sensor and technique for using the same
TL;DR: In this article, a medical sensor is adapted to account for factors that cause irregularities in pulse oximetry measurements or other spectrophotemetric measurements using surface features that reduce the amount of outside light or shunted light that impinge the detecting elements of the sensor.
Patent
Body-worn vital sign monitor
TL;DR: In this paper, a body-worn vital sign monitor that measures a patient's vital signs (e.g. blood pressure, SpO2, heart rate, respiratory rate, and temperature) while simultaneously characterizing their activity state (i.e. resting, walking, convulsing, falling) and posture (upright, supine).
Patent
Sleep apnea risk evaluation
TL;DR: In this article, a small light-weight physiological monitoring system, affixed to a patient's forehead, detects and records the pulse, oximetry, snoring sounds, and head position of a patient to detect a respiratory event, such as sleep apnea.
Patent
Physiological measurement communications adapter
TL;DR: In this paper, a sensor interface is configured to receive a sensor signal and a receiver receives the signal corresponding to the transmit signal, and then the receiver transmits the signal to the transmitter.
References
More filters
Patent
Signal processing apparatus.
Kheir Diab,Esmaiel Kiani-Azarbayjany,Ibrahim M. Elfadel,Rex Mccarthy,Walter M. Weber,Robert Smith +5 more
TL;DR: In this paper, a method and apparatus for analyzing two measured signals that are modeled as containing primary and secondary portions is presented, where coefficients relate the two signals according to a model defined in accordance with the present invention.
Patent
Signal processing apparatus and method
Mohamed K. Diab,Rex J. McCarthy +1 more
TL;DR: In this article, a method and an apparatus to analyze two measured signals that are modeled as containing desired and undesired portions such as noise, FM and AM modulation are presented, and coefficients relate the two signals according to a model defined in accordance with the present invention.
Patent
Limited use medical probe
Dennis Bahr,Michael T. Larsen +1 more
TL;DR: In this paper, a limited use medical probe is disclosed, including a memory for maintaining a use value, coupled to a medical device that inhibits its function when the use value reaches a predetermined threshold value, preventing improper use of the probe.
Patent
Methods and apparatus for inhibiting contamination of reusable pulse oximetry sensors
TL;DR: In this article, a protective sheath for a pulse oximetry sensor is proposed to reduce the likelihood of cross-patient contamination during each use while reducing the overall costs of such sensors per use.
Patent
Noninvasive measurement of chemical substances
TL;DR: In this article, a transensor mounted in the contact device laying on the cornea or the surface of the eye is capable of evaluating and measuring physical and chemical parameters in the eye including non-invasive blood analysis.