A commercial human pulse oximeter was used in several species to measure heart rate and arterial oxygen saturation (Sa02), and the results compared with those from an ECG and bench oximeter. The heart rates were always the same, but differences in the Sa02 ranged between 4.2 per cent to 10.3 per cent. Correlation coefficients between the two Sa02 measurement techniques ranged from 0.81 to 0.94,...

BACKGROUND Sleep disordered breathing (SDB) can lead to daytime sleepiness, growth failure and developmental delay in children. Polysomnography (PSG), the gold standard to diagnose SDB, is a highly resource-intensive test, confined to the sleep laboratory. AIM To combine the blood oxygen saturation (SpO2) characterization and cardiac modulation, quantified by pulse rate variability (PRV), to ...

Pulse oximetry is a ubiquitous non-invasive medical sensing method for measuring pulse rate and arterial blood oxygenation. Conventional pulse oximeters use expensive optoelectronic components that restrict sensing locations to finger tips or ear lobes due to their rigid form and area-scaling complexity. In this work, we report a pulse oximeter sensor based on organic materials, which are compa...

BACKGROUND In this pilot study we explored the suitability of the esophagus as a new measuring site for blood oxygen saturation (Spo(2)) in neonates. METHODS A new miniaturized esophageal pulse oximeter has been developed. Five patients (one child and four neonates) were studied. RESULTS Spo(2) values were obtained in the esophagus of all patients. A Bland and Altman plot of the difference ...

PURPOSE Pulse oximetry is routinely used to continuously and non-invasively monitor arterial oxygen saturation (SaO2). When oxygen saturation by pulse oximeter (SpO2) overestimates SaO2, hypoxemia may be overlooked. We compared the SpO2 - SaO2 differences among three pulse oximeters in patients with chronic thromboembolic pulmonary hypertension (CTEPH) who spent their daily lives in a poor oxyg...

Measurements of carboxyhemoglobin (COHb) for clinical purposes are routinely made with CO-oximeters. However, fetal hemoglobin (HbF) interferes with this spectrophotometric method. The manufacturer (Ciba Corning Diagnostics) of a new CO-oximeter (CCD 270) claims that COHb measurements with this instrument are insignificantly affected by HbF. We examined this claim through CO-oximeter analysis o...

An amplifier system has been designed for use with commercially available oximeter earpiece or cuvette and a direct recording oscillograph. Linear response to changes in oxygen saturation and in vivo dye concentrations are obtained with a rise time less than 0.5 sec., noise level and drift less than 2.5 per cent and accuracy comparable to Van Slyke-Neill method. Standard error of estimate betwe...