نتایج جستجو برای: pulse oximeter

تعداد نتایج: 90424  

2013
Chris Petersen Tso P. Chen John Mark Ansermino Guy Albert Dumont

Infectious diseases such as pneumonia take the lives of millions of children in low- and middle-income countries every year. Many of these deaths could be prevented with the availability of robust and low-cost diagnostic tools using integrated sensor technology. Pulse oximetry in particular, offers a unique non-invasive and specific test for an increase in the severity of many infectious diseas...

Journal: :JAMA pediatrics 2014
Hsiao-Wen Chen Li-Chueh Weng Ta-Min Wang Kwai-Fong Ng

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) ...

2009
Susannah G. Fleming Lionel Tarassenko

The photoplethysmogram (PPG) is the pulsatile waveform produced by the pulse oximeter, which is widely used for monitoring arterial oxygen saturation in patients. Various methods for extracting the breathing rate from the PPG waveform have been compared using a consistent data set, and a novel technique using autoregressive modelling is presented. This novel technique is shown to outperform the...

Journal: :Sleep advances 2022

Abstract To assess possible SpO2 accuracy differences between 3 different (oximeter & software) testing techniques. Hypothesised that in would be within the oximeter manufacturer’s specification. A synthetic digit, OX-1 OxSim® Optical Pulse Oximeter Simulator (Pronk Technologies Inc., Sun Valley, CA) can provide simulated HR values : 85% (80BPM), 98% (140BPM), 99% (80BPM) at low perfusion a...

Journal: :Shock 2015
Colin F Mackenzie Cheng Gao Peter F Hu Amechi Anazodo Hegang Chen Theresa Dinardo P Cristina Imle Lauren Hartsky Christopher Stephens Jay Menaker Yvette Fouche Karen Murdock Samuel Galvagno Richard Alcorta Stacy Shackelford

Early recognition of hemorrhage during the initial resuscitation of injured patients is associated with improved survival in both civilian and military casualties. We tested a transfusion and lifesaving intervention (LSI) prediction algorithm in comparison with clinical judgment of expert trauma care providers. We collected 15 min of pulse oximeter photopletysmograph waveforms and extracted fea...

2009
R. P. Buinevicius J. G. Webster

Pulse oximetry measures the relative concentration of arterial oxygenated hemoglobin and reduced hemoglobin. This paper presents the design of a pulse oximeter, which measures the presence of a third substance, carboxyhemoglobin (HbCO), by unfiltered LEDs at 660 nm, 810 nm, and 940 nm. Background information is given on the theory of pulse oximetry. Theoretical approximations and calculations w...

Journal: :The British journal of ophthalmology 2010
Sam Kain William Huxley Morgan Dao-Yi Yu

AIMS Central retinal vein pulsation is affected by intracranial pressure (ICP), glaucoma and venous pathology. Its genesis is poorly understood with most models suggesting that intraocular pressure (IOP) fluctuation dominates the rhythm of venous pulsation; however, this has not been explored experimentally. This study planned to measure the timing of central retinal vein pulsation with respect...

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