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Pulse oximeter

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https://www.readbyqxmd.com/read/28203338/the-predictive-value-of-pulse-oximeters-for-pulse-improvement-after-angiography-in-infants-and-children
#1
Mohammad-Reza Alipour, Mazyar Rastegar, Mehdi Ghaderian, Seyedeh-Mahdieh Namayandeh, Reza Faraji, Zohreh Pezeshkpour
BACKGROUND: Information from pulse oximeter waves confirms the presence of a pulse and helps obtain waves from tissue when the supplying artery is not readily accessible. OBJECTIVES: This study determined the predictive value of pulse oximeters for detecting improved arterial pulses after angiography. PATIENTS AND METHODS: This cross-sectional, multi-center study included 467 4-day-old to 12-year-old patients and was conducted from January 2012 to January 2016...
October 2016: Iranian Journal of Pediatrics
https://www.readbyqxmd.com/read/28140834/validation-of-a-standalone-smartphone-application-for-measuring-heart-rate-using-imaging-photoplethysmography
#2
Ming-Zher Poh, Yukkee C Poh
BACKGROUND: The aim of this study was to determine the accuracy of a freely available smartphone application, Cardiio app (Cardiio, Inc., Cambridge, MA), to measure heart rate from the finger or face using imaging photoplethysmography, by comparing against an FDA-cleared pulse oximeter at rest, and after moderate to vigorous exercise. METHODS: A total of 40 healthy adults participated in this study. Participants engaged in a period of rest, followed by 3 min of moderate to vigorous intensity cycling on a stationary bicycle...
January 31, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28135764/reliability-and-validity-of-non-invasive-determined-haemoglobin-mass-and-blood-volumes
#3
Nazzareno Fagoni, Andreas Breenfeldt Andersen, Laura Oberholzer, Thomas Haider, Anne-Kristine Meinild Lundby, Carsten Lundby
INTRODUCTION: The carbon monoxide (CO) rebreathing method used for the determination of haemoglobin mass (Hbmass ) is associated with blood sample analysis (in this study: Radiometer ABL800). As an alternative hereto the aim of the present study was to evaluate the use of a portable and non-invasive CO pulse oximeter (Rad-57). METHOD: With simultaneous determination of CO in the circulation by ABL800 (%HbCO) and Rad-57 (SpCO), Hbmass and blood volume (BV) were determined in duplicates in 24 volunteers...
January 30, 2017: Clinical Physiology and Functional Imaging
https://www.readbyqxmd.com/read/28130679/in-vivo-investigation-of-ear-canal-pulse-oximetry-during-hypothermia
#4
K Budidha, P A Kyriacou
Pulse oximeters rely on the technique of photoplethysmography (PPG) to estimate arterial oxygen saturation (SpO[Formula: see text]). In conditions of poor peripheral perfusion such as hypotension, hypothermia, and vasoconstriction, the PPG signals detected are often weak and noisy, or in some cases unobtainable. Hence, pulse oximeters produce erroneous SpO[Formula: see text] readings in these circumstances. The problem arises as most commercial pulse oximeter probes are designed to be attached to peripheral sites such as the finger or toe, which are easily affected by vasoconstriction...
January 27, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28126420/respiratory-effort-from-the-photoplethysmogram
#5
Paul S Addison
The potential for a simple, non-invasive measure of respiratory effort based on the pulse oximeter signal - the photoplethysmogram or 'pleth' - was investigated in a pilot study. Several parameters were developed based on a variety of manifestations of respiratory effort in the signal, including modulation changes in amplitude, baseline, frequency and pulse transit times, as well as distinct baseline signal shifts. Thirteen candidate parameters were investigated using data from healthy volunteers. Each volunteer underwent a series of controlled respiratory effort maneuvers at various set flow resistances and respiratory rates...
January 23, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28113791/a-robust-motion-artifact-detection-algorithm-for-accurate-detection-of-heart-rates-from-photoplethysmographic-signals-using-time-frequency-spectral-features
#6
Duy Dao, S M A Salehizadeh, Yeon Noj, Jo Woon Chong, Chae Cho, Dave Mcmanus, Chad E Darling, Yitzhak Mendelson, Ki H Chon
Motion and noise artifacts (MNAs) impose limits on the usability of the photoplethysmogram (PPG), particularly in the context of ambulatory monitoring. MNAs can distort PPG, causing erroneous estimation of physiological parameters such as heart rate (HR) and arterial oxygen saturation (SpO2). In this study we present a novel approach, "TifMA," based on using the Time-frequency spectrum of PPG to first detect the MNA-corrupted data and next discard the non-usable part of the corrupted data. The term "non-usable" refers to segments of PPG data from which the HR signal cannot be recovered accurately...
October 21, 2016: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28113284/type-2-diabetes-screening-test-by-means-of-a-pulse-oximeter
#7
Enrique Moreno, Maria Jose Lujan, Maria Anyo Lujan, Montse Torrres Rusinol, Paqui Juarez Fernandez, Pilar Nunez Manrique, Cristina Aragon Trivino, Magda Miquel, Marife Rodriguez, M Jose Gonzalez Burguillos
In this paper, we propose a method for screening for the presence of type 2 diabetes by means of the signal obtained from a pulse oximeter. The screening system consists of two parts; the first analyses the signal obtained from the pulse oximeter, and the second consists of a machine-learning module. The system consists of a front end that extracts a set of features form the pulse oximeter signal. These features are based on physiological considerations. The set of features were the input of a machine-learning algorithm that determined the class of the input sample, i...
April 20, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28113188/type-2-diabetes-screening-test-by-means-of-a-pulse-oximeter
#8
Enrique Monte Moreno, Maria Jose Anyo Lujan, Montse Torrres Rusinol, Paqui Juarez Fernandez, Pilar Nunez Manrique, Cristina Aragon Trivino, Magda Pedrosa Miquel, Marife Alvarez Rodriguez, M Jose Gonzalez Burguillos
In this paper, we propose a method for screening for the presence of type 2 diabetes by means of the signal obtained from a pulse oximeter. The screening system consists of two parts: the first analyzes the signal obtained from the pulse oximeter, and the second consists of a machine-learning module. The system consists of a front end that extracts a set of features form the pulse oximeter signal. These features are based on physiological considerations. The set of features were the input of a machine-learning algorithm that determined the class of the input sample, i...
February 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28106356/accuracy-of-non-invasive-hemoglobin-monitoring-by-pulse-co-oximeter-during-liver-transplantation
#9
Gulay Erdogan Kayhan, Yusuf Z Colak, Mukadder Sanli, Muharrem Ucar, Huseyin I Toprak
BACKGROUND: Hemoglobin level monitoring is essential during liver transplantation (LT) due to substantial blood loss. We evaluated the accuracy of noninvasive and continuous hemoglobin monitoring (SpHb) obtained by a transcutaneous spectrophotometry-based technology (Masimo Corporation, Irvine, CA) compared with conventional laboratory Hb measurement (HbL) during LT. Additionally, we made subgroup analyses for distinct surgical phases that have special features and hemodynamic problems and thus may affect the accuracy of SpHb...
January 20, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28103562/a-decision-support-system-for-tele-monitoring-copd-related-worrisome-events
#10
Mario Merone, Claudio Pedone, Giuseppe Capasso, Raffaele Antonelli Incalzi, Paolo Soda
Chronic Obstructive Pulmonary Disease (COPD) is a preventable, treatable and slowly progressive disease, whose course is aggravated by a periodic worsening of symptoms and lung function lasting for several days. The development of home telemonitoring systems has made possible to collect symptoms and physiological data in electronic records, boosting the development of decision support systems (DSSs). Current DSSs work with physiological measurements collected by means of several measuring and communication devices as well as with symptoms gathered by questionnaires submitted to COPD subjects...
January 17, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28099422/relationship-between-perfusion-index-and-patent-ductus-arteriosus-in-preterm-infants
#11
Enrique Gomez-Pomar, Majd Makhoul, Philip M Westgate, Katrina T Ibonia, Abhijit Patwardhan, Peter J Giannone, Henrietta Bada, Elie G Abu Jawdeh
BACKGROUND: Perfusion index (PI) is a noninvasive measure of perfusion. ΔPI (difference between pre and post-ductal PI) may identify hemodynamically significant PDA. However, studies are limited to brief and intermittent ΔPI sampling. Our objective is to assess the value of continuous high resolution ΔPI monitoring in the diagnosis of PDA. METHODS: Continuous ΔPI monitoring in preterm infants was prospectively performed using two high resolution pulse oximeters...
January 18, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28099286/multicenter-study-validating-accuracy-of-a-continuous-respiratory-rate-measurement-derived-from-pulse-oximetry-a-comparison-with-capnography
#12
Sergio D Bergese, Michael L Mestek, Scott D Kelley, Robert McIntyre, Alberto A Uribe, Rakesh Sethi, James N Watson, Paul S Addison
BACKGROUND: Intermittent measurement of respiratory rate via observation is routine in many patient care settings. This approach has several inherent limitations that diminish the clinical utility of these measurements because it is intermittent, susceptible to human error, and requires clinical resources. As an alternative, a software application that derives continuous respiratory rate measurement from a standard pulse oximeter has been developed. We sought to determine the performance characteristics of this new technology by comparison with clinician-reviewed capnography waveforms in both healthy subjects and hospitalized patients in a low-acuity care setting...
January 17, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28088483/physiology-recording-with-magnetic-field-probes-for-fmri-denoising
#13
Simon Gross, Laetitia Vionnet, Lars Kasper, Benjamin E Dietrich, Klaas P Pruessmann
Physiological noise originating in cardiovascular and respiratory processes is a substantial confound in BOLD fMRI. When unaccounted for it reduces the temporal SNR and causes error in inferred brain activity and connectivity. Physiology correction typically relies on auxiliary measurements with peripheral devices such as ECG, pulse oximeters, and breathing belts. These require direct skin contact or at least a tight fit, impairing subject comfort and adding to the setup time. In this work, we explore a touch-free alternative for physiology recording, using magnetic detection with NMR field probes...
January 11, 2017: NeuroImage
https://www.readbyqxmd.com/read/28070653/impact-of-acute-changes-in-perfusion-index-and-blood-pressure-on-the-accuracy-of-non-invasive-continuous-hemoglobin-concentration-measurements-during-induction-of-anesthesia
#14
Junichi Saito, Masato Kitayama, Erika Amanai, Kentaro Toyooka, Kazuyoshi Hirota
PURPOSE: Several factors affect the accuracy of non-invasive continuous hemoglobin concentration (SpHb) measurements. We had previously shown an increase in the perfusion index (PI) following induction of anesthesia which was associated with an increase in the difference between SpHb and total hemoglobin (tHb) (SpHb-tHb). We hypothesized that blunting the increase in PI by maintaining blood pressure during induction of anesthesia would improve the agreement between SpHb and tHb measurements...
January 9, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28048538/th-ab-209-05-validating-hemoglobin-saturation-and-dissolved-oxygen-in-tumors-using-photoacoustic-computed-tomographic-spectroscopic-imaging
#15
J Burnett, J Sick, N Cao, B Liu, H Nakshatri, M Mendonca, K Stantz
PURPOSE: Photoacoustic computed tomographic spectroscopy (PCT-S) provides intra-tumor measurements of oxygenation with high spatial resolution (0.2mm) and temporal fidelity (1-2 minutes) without the need for exogenous agents or ionizing radiation, thus providing a unique in vivo assay to measure SaO2 and investigate acute and chronic forms of hypoxia. The goal of this study is to validate in vivo SaO2 levels within tail artery of mice and the relationship between SaO2 and pO2 within subcutaneous breast tumors using PCT-S imaging, pulse oximetry and an OxyLite probe...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28042274/effectiveness-of-behavioral-modification-techniques-with-visual-distraction-using-intrasulcular-local-anesthesia-in-hearing-disabled-children-during-pulp-therapy
#16
Kausar Sadia Fakhruddin, Mehmet Omer Gorduysus, Hisham El Batawi
OBJECTIVE: Assessing the effectiveness of behavioral modification techniques in combination with visual distraction with/without video eyewear using computerized delivery system-intrasulcular (CDS-IS) during the application of local anesthetic in hearing-impaired pediatric patients undergoing pulp therapy of primary molars. MATERIALS AND METHODS: This randomized, crossover clinical study includes 15 children (7 boys and 8 girls), mean age was 6.1 years. Children were randomly distributed into two groups (Group A, n = 7; Group B, n = 8)...
October 2016: European Journal of Dentistry
https://www.readbyqxmd.com/read/28034464/noninvasive-hemoglobin-monitoring-in-critically-ill-pediatric-patients-at-risk-of-bleeding
#17
P García-Soler, J M Camacho Alonso, J M González-Gómez, G Milano-Manso
OBJECTIVE: To determine the accuracy and usefulness of noninvasive continuous hemoglobin (Hb) monitoring in critically ill patients at risk of bleeding. DESIGN: An observational prospective study was made, comparing core laboratory Hb measurement (LabHb) as the gold standard versus transcutaneous hemoglobin monitoring (SpHb). SETTING: Pediatric Intensive Care Unit of a tertiary University Hospital. PATIENTS: Patients weighing >3kg at risk of bleeding...
December 26, 2016: Medicina Intensiva
https://www.readbyqxmd.com/read/28033078/the-accuracy-of-noninvasive-peripheral-pulse-oximetry-after-palliative-cardiac-surgery-in-patients-with-cyanotic-congenital-heart-disease
#18
Gemma E Scrimgeour, Michael J Griksaitis, John V Pappachan, Andrew J Baldock
BACKGROUND: Children with cyanotic congenital heart disease (CCHD) live with oxyhemoglobin saturations that are typically expressed as percentages in the range of 70s and 80s. Peripheral pulse oximetry (measurement of SpO2) performs poorly in this range and yet is widely used to inform clinical decisions in these patients. The reference standard is co-oximetry of arterial samples (SaO2). METHODS: In this study, 515 paired measurements of SpO2 and SaO2 were taken from 19 children who had undergone palliative cardiac surgery...
January 2017: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/28024357/controllable-co-release-following-near-infrared-light-induced-cleavage-of-iron-carbonyl-derivatized-prussian-blue-nanoparticles-for-co-assisted-synergistic-treatment
#19
Wei-Peng Li, Chia-Hao Su, Ling-Chuan Tsao, Chun-Ting Chang, Ya-Ping Hsu, Chen-Sheng Yeh
Carbon monoxide (CO) causes the dysfunction of mitochondria to induce the apoptosis of cancer cells giving a promising choice as an emerging treatment. The currently reported CO-based complexes still suffer from many limitations. Synthesis of CO-release carriers in the manner of on-demand control is highly anticipated. In this study, we present a near-infrared (NIR) light-responsive CO-delivery nanocarrier, a PEGylated iron carbonyl derivatized Prussian blue (PB) nanoparticle (NP). Taking the structural characteristic containing Fe(3+)-N≡C-Fe(2+) unit, the -CN(-) served as the active sites for the coordination of iron carbonyl, while the surface Fe sites chelated with the amine-functionalized polyethylene glycol (NH2-PEG6000-NH2) to yield PEGylated PB NPs carrying CO...
December 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/27994302/modern-strategy-for-identification-of-congenital-heart-defects-in-the-neonatal-period
#20
Mediha Kardasevic, Ida Jovanovic, Jelica Predojevic Samardzic
INTRODUCTION: Congenital heart defects are the most common congenital anomalies and occur with an incidence from 0.8 to 1% per 1000 live births. In recent years, the pulse oximetry has become a strong candidate for detecting cyanogen congenital heart defects and in combination with routine clinical exam can improve diagnostic of congenital heart diseases. OBJECTIVE: To apply the modern algorithm for early detection of congenital heart defects in order to improve the diagnosis in the neonatal period...
October 2016: Medical Archives
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