Abstract: Methods and apparatus are provided for non-invasively determining blood pH by a multivariate analysis technique, such as classical least squares (CLS), partial least squares (PLS), or principal components regression (PCR). The technique employs at least one spectral factor based on the difference in the spectrum of a hemoglobin fraction (e.g., oxyhemoglobin) at two different pH's (e.g., pH 7.2 and pH 7.8). The spectral factor is preferably evaluated over the wavelength range of 520-680 nm.

Abstract: An opto-electronic device utilizes a band of polychromatic light for quantitative analysis of a target molecule within a mixed specimen. A movable polarizer produces a segmented band of partially polarized polychromatic light from the band of partially polarized polychromatic light. A specimen cell adapted for receiving the mixed specimen transports the segmented band of partially polarized polychromatic light to the mixed specimen. A movable polarizing analyzer is optically coupled to the segmented band of partially polarized polychromatic light exiting the mixed specimen. The segmented band of partially polarized polychromatic light before entering the mixed specimen is compared with the segmented band of partially polarized polychromatic light after exiting the mixed specimen. The movable polarizer is synchronized with the movable polarizing analyzer.

Abstract: The present invention provides an oximeter sensor holder that includes first and second lateral members for receiving the sensor, a living hinge connecting proximal ends of the first and second lateral members, and first and second press tabs for moving the first and second lateral members about the living hinge. The first lateral member and the first press tab are in an opposed and spaced-apart relationship to the second lateral member and second press tab, respectively. To open and close the lateral members, at least one of the press tabs pivots about the living hinge away from and toward the other press tab. The holder can include one or more retaining walls to inhibit lateral movement of the sensor when positioned between the first and second lateral members.

Abstract: A sensor performs medical measurements, particularly pulsoximetric measurements, and is attached or otherwise adhered to a human fingernail or toenail by an inwardly concave, first casing part of a sensor. Electromagnetic, particularly optical, transmitting elements and receiving elements permit the measurement of the radiation reflected by or transmitted through the tissue. The sensor is easy to apply, allows a long application period and is reusable.

Abstract: The present invention relates to a method for monitoring the health of a patient by utilizing measurements. In order to improve the contact between the patient and the person treating him, the results of the measurements are supplied via a communications device (1) utilizing a wireless data transmission link to a data processing system (9) available to the person monitoring the patient's health, and the patient's health is monitored by means of the data stored in the data processing system (9).

Abstract: An improved electromagnetic shield for a photodetector which uses a wire mesh screen laminated to an insulating layer. A portion of the wire mesh screen and laminated layer sandwich can then be cut out to provide an individual electromagnetic shield. The sandwich combination is flexible, and can be easily wrapped around the photodetector. Preferably, an adhesive is on one side of the insulating layer, to allow the wrapped combination to adhere to the photodetector.