Abstract: A sensor includes a sensor pad configured to be disposed on a portion of a patient's body. A light sheet is disposed on the sensor pad and has a first substrate and a second substrate spaced from one another. The light sheet further includes a light source configured to emit near-infrared light and a light detector configured to detect near-infrared light. The light source and the light detector are disposed between the substrates. The sensor pad is configured to allow light generated by the light source to travel through the portion of the patient's body to the light detector. The light received by the light detector is indicative of oxygen saturation of the portion of the patient's body through which the light travelled.

Abstract: A sensor for measuring physiological characteristics is provided that includes a circuit assembly and a means of deforming the sensor to a desired shape of small radius compound curvature. In one embodiment, the sensor includes a deformable layer configured to conform and maintain a shape of a surface on which the sensor is applied.

Abstract: A sensor for measuring physiological characteristics includes a circuit assembly, at least one material layer, and an adhesive layer that extends beyond an outer edge of the circuit assembly. The at least one material layer forms an adhesive edge around the perimeter of the sensor.

Abstract: A physiological sensor includes a light source and an age detector circuit in communication with the light source. The age detector circuit is configured to determine an age of the light source based on current-voltage characteristics of said light source. In addition, a method includes measuring an initial I-V characteristic and an actual I-V characteristic of the light source, and comparing the initial I-V characteristic to the actual I-V characteristic since changes in the I-V characteristics indicate aging. Actual I-V characteristics can be compared between light sources when they age at different rates to determine light source aging. Moreover, the method may include updating the memory device with the actual I-V characteristic at predetermined times.

Abstract: A system and method for non-invasively estimating the tissue blood oxygen saturation level of a human subject, including so-called “outliers”, whose physiological make-up causes previously-known techniques to generate invalid tissue blood oxygen saturation estimations. The system includes a computing device and a sensor. The sensor includes a light source configured to emit light of at least four different wavelengths, one at a time. The sensor also includes two light detectors, each positioned a different distances from the light source. Optical density measurements are taken by the light detectors and provided to the computing device. A first tissue blood oxygen saturation value is computed using the optical density measurements associated with three of the four wavelengths, and a second tissue blood oxygen saturation value is computed using the optical density measurements associated with four of the wavelengths.

Abstract: A physiological sensor having reduced sensitivity to interference includes a light source, a light detector in optical communication with the light source, and a sensor pad at least partially housing the light source and the light detector. The sensor pad is configured to be capacitively isolated from a patient. Moreover, the physiological sensor may be electrically connected to an amplifier having a signal ground and a monitor.

Abstract: A physiological sensor assembly includes a physiological sensor having at least one light source and at least one optical receiver. A substantially transparent barrier layer is disposed between the physiological sensor and the patient's skin such that the barrier layer is removably adhered to the physiological sensor and removably adhered to the patient's skin.

Abstract: A sensor includes a sensor pad that allows air and moisture to diffuse from a patient's skin. A light source is disposed on the sensor pad is configured to generate near-infrared light. A light detector disposed on the sensor pad is configured to detect near-infrared light generated by the light source.

Abstract: An exemplary sensor includes a sensor pad defining a perimeter, a light source, a light detector, and an adhesive layer. The light source is configured to generate near-infrared light and transmit the near-infrared light through part of a patient's body. The light detector is configured to receive the near-infrared light generated by the light source after it has traveled through part of the patient's body. The light received by the light detector indicates an amount of oxygen in the part of the patient's body through which the near-infrared light traveled. The adhesive layer is offset relative to the sensor pad to, for example, allow a clinician to easily remove the sensor from the patient.

Abstract: An exemplary sensor includes an integrated sensor pad having a first portion and a second portion separated by a waist portion. The waist portion is narrower than the first portion and the second portion. A light source that is disposed on the first portion is configured to generate near-infrared light and transmit the near-infrared light into a patient's body. A light detector that is disposed on the second portion is configured to detect near-infrared light that has traveled through part of the patient's body.

Abstract: A method for monitoring oxygen saturation that includes the following steps: (i) measuring an oxygen saturation of a target area of a person or animal over time; (ii) measuring an oxygen saturation of a reference area of the person or animal over time; and (iii) classifying the oxygen saturation status of the target area based upon a comparison of the oxygen saturation of the target area relative to the oxygen saturation of the reference area over time.

Abstract: An exemplary sensor includes a sensor pad defining a plurality of openings and a circuit board. The circuit board is at least partially disposed in the sensor pad and has a light source configured to generate near-infrared light and a light detector configured to receive near-infrared light. The light source and the light detector are each aligned with one of the openings of the sensor pad so that near-infrared light generated by the light source can travel through a part of a patient's body to the light detector and the near-infrared light received by the light detector indicates oxygen saturation of the part of the patient's body through which the light travelled. The circuit board further includes an integrally formed tail at least partially disposed in the sensor pad. Additionally, the sensor pad includes an overlay disposed on the tail.

Abstract: An exemplary sensor includes a sensor pad defining a perimeter, a light source, a light detector, and an adhesive layer. The light source is configured to generate near-infrared light and transmit the near-infrared light through part of a patient's body. The light detector is configured to receive the near-infrared light generated by the light source after it has traveled through part of the patient's body. The light received by the light detector indicates an amount of oxygen in the part of the patient's body through which the near-infrared light traveled. The adhesive layer is offset relative to the sensor pad to, for example, allow a clinician to easily remove the sensor from the patient.

Abstract: A method for monitoring oxygen saturation that includes the following steps: (i) measuring an oxygen saturation of a target area of a person or animal over time; (ii) measuring an oxygen saturation of a reference area of the person or animal over time; and (iii) classifying the oxygen saturation status of the target area based upon a comparison of the oxygen saturation of the target area relative to the oxygen saturation of the reference area over time.

Abstract: An exemplary sensor includes an integrated sensor pad having a first portion and a second portion separated by a waist portion. The waist portion is narrower than the first portion and the second portion. A light source that is disposed on the first portion is configured to generate near-infrared light and transmit the near-infrared light into a patient's body. A light detector that is disposed on the second portion is configured to detect near-infrared light that has traveled through part of the patient's body.

Abstract: A system and method for non-invasively estimating the tissue blood oxygen saturation level of a human subject, including so-called “outliers”, whose physiological make-up causes previously-known techniques to generate invalid tissue blood oxygen saturation estimations. The system includes a computing device and a sensor. The sensor includes a light source configured to emit light of at least four different wavelengths, one at a time. The sensor also includes two light detectors, each positioned a different distances from the light source. Optical density measurements are taken by the light detectors and provided to the computing device. A first tissue blood oxygen saturation value is computed using the optical density measurements associated with three of the four wavelengths, and a second tissue blood oxygen saturation value is computed using the optical density measurements associated with four of the wavelengths.

Abstract: An exemplary sensor includes a sensor pad defining a perimeter, a light source, a light detector, and an adhesive layer. The light source is configured to generate near-infrared light and transmit the near-infrared light through part of a patient's body. The light detector is configured to receive the near-infrared light generated by the light source after it has traveled through part of the patient's body. The light received by the light detector indicates an amount of oxygen in the part of the patient's body through which the near-infrared light traveled. The adhesive layer is offset relative to the sensor pad to, for example, allow a clinician to easily remove the sensor from the patient.

Abstract: A physiological sensor having reduced sensitivity to interference includes a light source, a light detector in optical communication with the light source, and a sensor pad at least partially housing the light source and the light detector. The sensor pad is configured to be capacitively isolated from a patient. Moreover, the physiological sensor may be electrically connected to an amplifier having a signal ground and a monitor.

Abstract: A sensor includes a sensor pad that allows air and moisture to diffuse from a patient's skin. A light source is disposed on the sensor pad is configured to generate near-infrared light. A light detector disposed on the sensor pad is configured to detect near-infrared light generated by the light source.

Abstract: An exemplary sensor includes a sensor pad having a first portion and a second portion separated by a waist portion. The waist portion is narrower than the first portion and the second portion. A light source that is disposed on the first portion is configured to generate near-infrared light and transmit the near-infrared light through part of a patient's body. A light detector that is disposed on the second portion is configured to detect near-infrared light that has traveled through the part of the patient's body. The near-infrared light detected indicates an amount of oxygen in the part of the patient's body through which the near-infrared light traveled.