OBJECTIVES The objective of this study was to assess the knowledge on pulse oximetry among health care professionals involved in pediatric care. METHODS A multiple-choice questionnaire was distributed to 505 pediatric health care professionals from 19 hospitals and health centers throughout Greece. Exploratory factor analysis was performed to identify underlying factors that could explain mos...

This paper will present a focused and personal history of physiologic monitoring, beginning with the discovery of modern anesthesia and its development from a technical practice to a scientific discipline. Emphasis will be on the essence of monitoring in the anesthesia evolution, and this work will attempt to answer the question of how to evaluate the impact of monitoring on patient outcome. Un...

Hemoglobin (Hb) Kansas is an inherited Hb variant with a low oxygen affinity that is associated with low oxygen saturation on pulse oximetry (SpO2). It leads to asymptomatic cyanosis. Patients with Hb Kansas do not require any specific treatment and the prognosis is good. In patients with unexplained cyanosis, we should thus consider Hb variants, including Hb Kansas and avoid unnecessary invest...

Using transcranial cerebral oximetry, we monitored 30 patients who underwent cerebral angiography by the femoral route. Transcranial cerebral oximetry is a noninvasive technique of regional cerebral oxygen saturation measurement that uses near-infrared spectroscopy to differentiate oxyhemoglobin from reduced hemoglobin. Needle puncture, catheterization, and contrast media injection produced no ...

Cerebral oximetry has been around for some 3 decades but has had a somewhat checkered history regarding application and reliability. More recently several monitors have been approved in the United States and elsewhere and the technique is emerging as a useful tool for assessing not only adequate cerebral oxygenation but also tissue oxygenation and perfusion in other organs.

Often, advances in medical technology become available on a widespread basis before a controlled scientific experience has accumulated to carefully delineate the indications, uses, and pitfalls of such technology I feel this certainly is the case with pulse oximetry and this issue is partially addressed by the data of Loggan, Kerby and Pingleton (see page 242). The accuracy simplicity and usefu...

As the sensitivity of gold standard has been mentioned as 88%, we calculated the sample size for 80% with a deviation of 5% on either side and the calculations show that sample size in this study is woefully inadequate [2]. Thus the study was inadequately powered to assess the validity of the proposed screening tests. As PPV depends upon prevalence, likelihood ratio is a better measure to overc...

This study evaluated in vivo imaging capabilities and safety of qualitative monitoring of oxygen saturation of hemoglobin (sO2) of rabbit ciliary body tissues obtained with acoustic resolution (AR) photoacoustic tomography (PAT). AR PAT was used to collect trans-scleral images from ciliary body vasculature of seven New Zealand White rabbits. The PAT sO2 measurements were obtained under the foll...

The assessment of oxygen saturation in arterial blood by pulse oximetry (SpO₂) is based on the different light absorption spectra for oxygenated and deoxygenated hemoglobin and the analysis of photoplethysmographic (PPG) signals acquired at two wavelengths. Commercial pulse oximeters use two wavelengths in the red and infrared regions which have different pathlengths and the relationship betwee...