A novel optical fiber array-type of sensing instrument with temperature compensation for real-time detection was developed to measure oxygen, carbon dioxide, and ammonia simultaneously. The proposed instrument is multi-sensing array integrated with real-time measurement module for portable applications. The sensing optical fibers were etched and polished before coating to increase sensitivities...

A novel optical sensor device monolithically integrated on a glass capillary is presented. Therefore, we took advantage of the ability to fabricate organic optoelectronic devices on non-planar substrates. The functionality of the concept is demonstrated by realizing an integrated oxygen sensor based on luminescence decay time measurement.

A transcutaneous electrochemical sensor designed to estimate arterial oxygen (Pao2) and carbon dioxide (Paco2) tensions simultaneously and continuously was evaluated in newborn infants with respiratory illnesses. After calibration with two dry gas mixtures the sensor gave estimates of Pao2 and Paco2 that were comparable with those obtained by two separate electrodes that are already established...

An amperometric sol-gel derived sensor that both releases nitric oxide (NO) and measures physiologically relevant concentrations of oxygen (PO2) is described. The sensor consists of a platinum electrode coated with an aminosilane/ethyltrimethoxysilane hybrid xerogel film. Hydrophilic polyurethane (HPU) is doped into the hybrid film to reduce sensor hydration time and increase oxygen permeabilit...

This paper presents of an algorithm for physical activity classification and MET mapping regression model construction for a wide range of daily activities using a wearable system. The sensor system consists of several sensor modules that can be synchronized to record the accelerations of diverse motions/activities. During the measurement the accelerations of daily activities, three sensor modu...

A transcutaneous oxygen sensor was used to detect the development of hypoxemia in patients undergoing fiberoptic bronchoscopy. Measurements of transcutaneous PO2 (tcPO2) correlated well with arterial PO2 (PaO2), and correctly detected all instances when PaO2 was less than 65 mm Hg. The sensor was noninvasive and caused no adverse effects.

We present a low-cost sensor buoy designed for unattended dissolved oxygen measurement in aquatic environment. We describe the buoy’s architectural design and three experiments that we carried out to demonstrate its viability: a laboratory test in a water tank with controlled oxygen level, a lake deployment and an extensive electric power consumption test. Our experiments indicate the viability...

Two new sensors for the detection of reactive oxygen species have been synthesized and characterized; they contain the 4-amino-7-nitrobenzofurazan (ABF) moiety covalently tethered to a phenol. Comparison of sensors ABFhd and dABFhd (the latter containing two ortho-methyl groups) shows that introduction of steric bulk leads to an improvement of fluorescent sensor performance, thus confirming our...

The relationships between neural and metabolic processes in activated brain regions are central to the interpretation of noninvasive imaging. To examine this relationship, we have used a specialized sensor to measure simultaneously tissue oxygen changes and neural activity in colocalized regions of the cat's lateral geniculate nucleus (LGN). Previous work with this sensor has shown that a decre...

The measurement of fluorescence quenching activity of [Ru(L)3] with 4,7-diphenyl1,10 phenanthroline (dip) on silica gel and embedded in polystyrene polymers for the determination of dissolved oxygen using fiber optic probe is described here. The system is extended by immobilization of glucose oxidaze (GOD) for the determination of glucose. The objective of the work is to conquer the leaching an...