Abstract: A multipurpose handpiece for use with an abrasive material delivery system is disclosed wherein the handpiece includes channels for delivery and removal of an abrasive material applied to a patient's skin. The invention includes a multi-port applicator for selectively applying the abrasive material, said application of abrasive material suited for different areas of tissue such as stomach versus eye lids. The present invention comprises a pair of tubings connected to a housing for delivery and vacuum removal of abrasive material, and a flow regulator disposed within the housing. Connected to the housing at an application end is a resurfacing applicator with a plurality of differing sized openings designed for different types of tissue. The present invention includes means for blocking the unused openings while permitting injection of the abrasive material through a selected opening. The blocking of the unused openings may be achieved by a shield or covers for each opening.

Abstract: A solar powered display device comprising a housing, a generally transparent cover, a solar panel disposed within the housing in planar parallel position with respect to the transparent cover, a battery disposed within the housing and electrically interconnected with the solar panel so as to facilitate charging of the battery via the solar panel, and an illuminator disposed within the housing so as to illuminate display indicia, the illuminator being in electrical communication with the solar panel and the battery so as to receive electrical power therefrom. The display indicia are formed upon plates removably disposed within the housing in planar parallel position with respect to the transparent cover, each plate preferably having a character or the like formed thereupon. A rack is configured to hold plates of a plurality of different sizes.

Abstract: An improved blood analyzing device is disclosed for measuring the hematocrit and oxygen saturation levels of a quantity of blood. The device is a syringe containing a single optical window insert into the tubular barrel.

Abstract: An improved blood analyzing device is disclosed for measuring the hematocrit and oxygen saturation levels of a quantity of blood. The device comprises a housing having a carriage assembly electrically interfaced thereto. Disposed within the carriage assembly is a light emitting means and a plurality of light detecting optical sensors which are used to provide hematocrit and oxygen saturation signals based on the scattering of light within a blood containment vessel disposed within the carriage. Signals generated from the sensors are processed by control electronics disposed within the housing so as to output a hematocrit measurement which is compensated for the effects of oxygen saturation, pH, and temperature, and an oxygen saturation measurement which is compensated for the effects of hematocrit, pH, and temperature.

Abstract: A system for measuring heparin concentration in a sample of blood plasma includes a vessel for containing a sample of blood plasma to which a dye such as azure A has been added, and a light source for transmitting light at each of two different wavelengths through the sample while the sample is in the vessel, one of which wavelengths may be relatively insensitive to heparin dilution. A detector arrangement detects the light at each of the two different wavelengths that is transmitted through the sample to produce two different signals, each one of which signals is indicative of the light transmitted through the sample at a respective one of the two different wavelengths. Processing components process the two different signals to produce an output signal indicative of the amount of heparin concentration that compensates for the effect of plasma dilution by comparing the two signals.

Abstract: The hematocrit of a volume of blood can be determined in real time without volume or flow rate limitations by sensing the diffusion of infrared light by the bloodstream. For this purpose, an infrared light beam is directed at a transparent cuvette through which the blood is conveyed, and a photodetector is mounted beside the cuvette at an angle such that the intersection of the light beam and of the principal sensitivity lobe of the detector is wholly spaced from the multiple scatter zone adjacent to the light source. The hematocrit signal produced by the photodetector can be corrected for the effect of oxygen saturation by providing an oxygen saturation signal, multiplying the hematocrit signal by a function of the oxygen saturation signal and using a look-up table to derive a linear true hematocrit signal. Means are also provided to compensate the detected hematocrit signal for the effects of temperature, drive current, and aging.

Abstract: A reference liquid-containing calibration cell for the calibration of a sensor for measuring a gaseous or non-gaseous constituent parameter of a fluid includes a chamber containing the reference liquid. The chamber is sealed to prevent loss of the reference liquid, and provides for communication between the sensor and a reference constituent present in the reference liquid. The chamber is provided with a gas-inleting port that is sealed by a first semi-permeable membrane. The first semi-permeable membrane is permeable to gaseous fluid constituents but impermeable to the reference liquid and to non-gaseous reference constituents present in the reference liquid. The chamber is further provided with a gas vent.

Abstract: A reference liquid-containing calibration cell for the calibration of a sensor for measuring a gaseous or non-gaseous constituent parameter of a fluid includes a chamber containing the reference liquid. The chamber is sealed to prevent loss of the reference liquid, and provides for communication between the sensor and a reference constituent present in the reference liquid. The chamber includes a gas-inleting port sealed by a first semi-permeable membrane which is permeable to a gaseous fluid constituent but impermeable to the reference liquid and non-gaseous reference constituents present in the reference liquid, the chamber further including a gas vent.