Background During cardiovascular interventions it is critical to have high-fidelity hemodynamic recordings of physiologic signals for patient safety and procedure guidance. MRI compatible monitoring systems are low-fidelity and not suitable for cardiovascular interventions. We present an MRI compatible hemodynamic recording system designed for MRI guided cardiovascular interventions. It is capa...

The aim of this study was to determine whether it is possible using ear-oximetry to prescribe the correct oxygen flow rates during exercise in chronic obstructive pulmonary disease (COPD) patients on long-term oxygen therapy (LTOT). Twenty COPD patients on LTOT, with exercise desaturation breathing oxygen at resting flow rates, performed a series of 6-min treadmill walking tests, with a progres...

To the Editor: In the April issue of RESPIRATORY CARE, Amalakanti and Pentakota1 present a comparison of arterial oxygen saturation values between a 2-wavelength pulse oximeter and blood gas multi-wavelength hemoximetry in COPD subjects with acute respiratory failure. The authors conclude that the 2-wavelength pulse oximeter significantly overestimates arterial oxygen saturation and that COPD a...

We determined the millimolar absorptivities of the four clinically relevant derivatives of fetal and adult human hemoglobin in the visible and near-infrared spectral range (450-1000 nm). As expected, spectral absorption curves of similar shape were found, but the small differences between fetal and adult hemoglobin absorptivity were important enough that they should be taken into account in mul...

Potential Use of Pulse Oximetry for the Diagnosis of Testicular Torsion Scrotal Doppler ultrasonography (scrotal US) has been commonly used for evaluating patients with suspected testicular torsion (TT).1,2However, scrotalUS isnot available in allmedical facilities. Comparatively, pulse oximetry is easily available at all institutions; it is used for monitoring pulse oximeter saturation (SpO2) ...

The introduction of pulse oximetry in clinical practice has allowed for simple, noninvasive, and reasonably accurate estimation of arterial oxygen saturation. Pulse oximetry is routinely used in the emergency department, the pediatric ward, and in pediatric intensive and perioperative care. However, clinically relevant principles and inherent limitations of the method are not always well unders...

PURPOSE OF REVIEW This article reviews the development of novel reflectance pulse oximetry sensors for the esophagus and bowel, and presents some of the techniques used to analyze the waveforms acquired with such devices. RECENT FINDINGS There has been much research in recent years to expand the utility of pulse oximetry beyond the simple measurement of arterial oxygen saturation from the fin...

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http:// creativecommons.org/licenses/by-nc/3.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. CC Lee et al. [1] had reported that regional cerebral oxygen saturation (rSO 2) decreases...

Pulse oximetry is being used in everyday clinical practice in anaesthesia utilising a peripheral probe. However, it may be unreliable in certain clinical situations such as hypothermia, hypovolemia, vasoconstriction and decreased cardiac output. Similar situations occur in burns patients and, more importantly, burns to extremities which limit the sites available for measurement of peripheral ox...