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Pulse oximetry

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https://www.readbyqxmd.com/read/29776787/the-value-of-peripheral-perfusion-index-measurements-for-early-detection-of-critical-cardiac-defects
#1
Ozgun Uygur, Ozge Altun Koroglu, Erturk Levent, Merve Tosyali, Mete Akisu, Mehmet Yalaz, Nilgun Kultursay
BACKGROUND: Approximately 25% of congenital heart diseases (CHD) are estimated to be critical and require an intervention. In this study, we aimed to investigate the additional value of peripheral perfusion index (PPI) measurements to pulse oximetry screening for critical CHD (CCHD). METHODS: Infants born at Ege University Hospital between May 2013 and September 2015 were prospectively included in the study. In addition to physical examination, pre- and postductal oxygen saturations and PPI values were measured with a new generation pulse oximeter before discharge from the hospital...
April 12, 2018: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/29775076/walking-with-controlled-breathing-improves-exercise-tolerance-anxiety-and-quality-of-life-in-heart-failure-patients-a-randomized-controlled-trial
#2
Hsiu-Chin Teng, Mei-Ling Yeh, Mei-Hua Wang
BACKGROUND: Patients with heart failure experience not only impaired physical condition, but also their physical activity, moods, and quality of life may be diminished. AIMS: The purpose of this study was to investigate the effects of 12-week walking with breathing program on physical activity tolerance considering time-dependent physiological factors and time-independent interoceptive awareness, as well as psychosocial factors. METHODS: This randomized controlled trial recruited 90 heart failure patients and randomly assigned them...
May 1, 2018: European Journal of Cardiovascular Nursing
https://www.readbyqxmd.com/read/29771822/pulse-oximetry-and-arterial-oxygen-saturation-during-cardiopulmonary-exercise-testing
#3
Mona Ascha, Anirban Bhattacharyya, Jose A Ramos, Adriano R Tonelli
INTRODUCTION/PURPOSE: Peripheral capillary oxygen saturation (SpO2) is used as surrogate for arterial blood oxygen saturation. We studied the degree of discrepancy between SpO2 and arterial oxygen (SaO2) and identified parameters that may explain this difference. METHODS: We included patients who underwent cardiopulmonary exercise testing (CPET) at Cleveland Clinic. Pulse oximeters with forehead probes measured SpO2 and arterial blood gas (ABG) samples provided the SaO2 both at rest and peak exercise...
April 30, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29764909/ohio-pediatric-asthma-repository-opportunities-to-revise-care-practices-to-decrease-time-to-physiologic-readiness-for-discharge
#4
Jeffrey M Simmons, Jocelyn M Biagini Myers, Lisa J Martin, Carolyn M Kercsmar, Christine L Schuler, Valentina V Pilipenko, John W Kroner, Hua He, Stephen R Austin, Huyen-Tran Nguyen, Kristie R Ross, Karen S McCoy, Sherman J Alter, Samantha M Gunkelman, Pierre A Vauthy, Gurjit K Khurana Hershey
BACKGROUND: Large-scale, multisite studies in which researchers evaluate patient- and systems-level factors associated with pediatric asthma exacerbation outcomes are lacking. We sought to investigate patient-level risks and system-level practices related to physiologic readiness for discharge (PRD) in the prospective Ohio Pediatric Asthma Repository. METHODS: Participants were children ages 2 to 17 years admitted to an Ohio Pediatric Asthma Repository hospital for asthma exacerbation...
May 15, 2018: Hospital Pediatrics
https://www.readbyqxmd.com/read/29760993/assessing-blood-vessel-perfusion-and-vital-signs-through-retinal-imaging-photoplethysmography
#5
Harnani Hassan, Sheila Jaidka, Vincent M Dwyer, Sijung Hu
One solution to the global challenge of increasing ocular disease is a cost-effective technique for rapid screening and assessment. Current ophthalmic imaging techniques, e.g. scanning and ocular blood flow systems, are expensive, complex to operate and utilize invasive contrast agents during assessment. The work presented here demonstrates a simple retinal imaging photoplethysmography (iPPG) system with the potential to provide screening, diagnosis, monitoring and assessment that is non-invasive, painless and radiationless...
May 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29760969/automated-spectroscopic-retinal-oximetry-with-visible-light-optical-coherence-tomography
#6
Shaohua Pi, Acner Camino, William Cepurna, Xiang Wei, Miao Zhang, David Huang, John Morrison, Yali Jia
Accurate, quantitative assessment of retinal blood oxygen saturation ( sO2 ) may provide a useful early indicator of pathophysiology in several ocular diseases. Here, with visible-light optical coherence tomography (OCT), we demonstrate an automated spectroscopic retinal oximetry algorithm to measure the sO2 within the retinal arteries (A- sO2 ) and veins (V- sO2 ) in rats by automatically detecting the vascular posterior boundary on cross-sectional structural OCT. The algorithm was validated in vitro with flow phantoms and in vivo in rats by comparing the sO2 results, respectively, to those obtained using a blood gas analyzer and pulse oximetry...
May 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29760010/home-oximetry-to-screen-for-obstructive-sleep-apnoea-in-down-syndrome
#7
Catherine M Hill, Heather E Elphick, Michael Farquhar, Paul Gringras, Ruth M Pickering, Ruth N Kingshott, Jane Martin, Janine Reynolds, Anna Joyce, Johanna C Gavlak, Hazel J Evans
OBJECTIVE: Children with Down syndrome are at high risk of obstructive sleep apnoea (OSA) and screening is recommended. Diagnosis of OSA should be confirmed with multichannel sleep studies. We aimed to determine whether home pulse oximetry (HPO) discriminates children at high risk of OSA, who need further diagnostic multichannel sleep studies. DESIGN: Cross-sectional prospective study in a training sample recruited through three UK centres. Validation sample used single-centre retrospective analysis of clinical data...
May 14, 2018: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/29757924/placebo-versus-low-dose-ketamine-infusion-in-addition-to-remifentanil-target-controlled-infusion-for-conscious-sedation-during-oocyte-retrieval-a-prospective-double-blinded-randomised-controlled-trial
#8
Hélène I Morue, Shalini Raj-Lawrence, Sarah Saxena, Anne Delbaere, Edgard Engelman, Luc A Barvais
BACKGROUND: Currently, there is no gold standard for monitored anaesthesia care during oocyte retrieval. OBJECTIVE: In our institution, the standard is a conscious sedation technique using a target-controlled infusion (TCI) of remifentanil, titrated to maintain a visual analogue pain score less than 30 mm. This protocol is well accepted by patients but is associated with frequent episodes of respiratory depression. The main objective of this study was to evaluate whether the addition of a continuous intravenous infusion of ketamine could reduce these episodes...
April 30, 2018: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29755808/the-role-of-duration-of-hyperbaric-oxygen-therapy-on-lung-injury-an-experimental-study-lung-injury-and-hyperbaric-oxygen-therapy
#9
Menduh Oruç, Bennur Esen, Maşuk Taylan, Yusuf Nergis, Atalay Şahin
OBJECTIVES: We aim to histopathologically analyze the effect of hyperbaric oxygen (HBO) therapy in the lung tissue. MATERIAL AND METHODS: A total of 21 rabbits were divided into three groups, with each containing seven rabbits. Group 1 was the control group. Group 2 underwent HBO of 3 atmosphere absolute (ATA) for 90 min/day for 7 days. In group 3, HBO at 3 ATA was administered 90 min/day for 28 days. Oxygen saturation (SpO2 ) was determined by pulse oximetry before and after administration of HBO...
April 2018: Turkish Thoracic Journal
https://www.readbyqxmd.com/read/29750887/the-effects-of-acute-hypoxia-on-tissue-oxygenation-and-circulating-alarmins-in-healthy-adults
#10
C J Boos, C M Lamb, M Midwinter, A Mellor, D R Woods, M Howley, T Stansfield, M Foster, J P O'hara
The binding of high-mobility group box-1 (HMGB-1) to the membrane receptor for advanced glycation end-products (mRAGE) is a key early mediator of non-infectious inflammation and its triggers include ischaemia/hypoxia. The effects of acute hypoxia on soluble RAGE (sRAGE) are unknown. Fourteen healthy adults (50% women; 26.6+/-3.8 years) were assessed at baseline normoxia (T0), followed by four time-points (T90, 95, 100 and 180 minutes) over three hours of continuous normobaric hypoxia (NH, 4450m equivalent) and again 60 minutes after return to normoxia (T240)...
May 10, 2018: Physiological Research
https://www.readbyqxmd.com/read/29750475/effects-of-losartan-and-allopurinol-on-cardiorespiratory-regulation-in-obstructive-sleep-apnoea
#11
Barbara J Morgan, Mihaela Teodorescu, David F Pegelow, Emily R Jackson, Devin L Schneider, David T Plante, James P Gapinski, Scott J Hetzel, John M Dopp
Chemoreflex sensitization produced by chronic intermittent hypoxia (CIH) in rats is attenuated by angiotensin II type 1 receptor (AT1 R) blockade. AT1 R blockade and xanthine oxidase inhibition both ameliorate CIH-induced endothelial dysfunction. We hypothesized treatment with losartan and allopurinol would reduce chemoreflex sensitivity and improve hypoxic vasodilation in patients with obstructive sleep apnoea (OSA). Eighty-six hypertensive patients with apnoea-hypopnoea index ≥25 events/hr and no other cardiovascular, pulmonary, renal, or metabolic disease were randomly assigned to receive allopurinol, losartan, or placebo for 6 weeks...
May 11, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29750114/profiling-the-propagation-of-error-from-ppg-to-hrv-features-in-a-wearable-physiological-monitoring-device
#12
Davide Morelli, Leonardo Bartoloni, Michele Colombo, David Plans, David A Clifton
Wearable physiological monitors are becoming increasingly commonplace in the consumer domain, but in literature there exists no substantive studies of their performance when measuring the physiology of ambulatory patients. In this Letter, the authors investigate the reliability of the heart-rate (HR) sensor in an exemplar 'wearable' wrist-worn monitoring system (the Microsoft Band 2 ); their experiments quantify the propagation of error from (i) the photoplethysmogram (PPG) acquired by pulse oximetry, to (ii) estimation of HR, and (iii) subsequent calculation of HR variability (HRV) features...
April 2018: Healthcare Technology Letters
https://www.readbyqxmd.com/read/29748228/how-to-use-saturation-monitoring-in-newborns
#13
Steven McVea, Michael McGowan, Bharathi Rao
Pulse oximetry is a first-line monitoring tool, used in neonatal medicine routinely as a part of continuous monitoring during intensive care. It is also used to guide response to resuscitation and as a screening tool for congenital heart disease. Despite its widespread use, many healthcare providers are unaware of the underlying principles and limitations of pulse oximetry in neonates. In this article, we will discuss the physiological and technological principles behind the use of saturation monitoring and its use in neonatal practice...
May 10, 2018: Archives of Disease in Childhood. Education and Practice Edition
https://www.readbyqxmd.com/read/29747889/oxygen-therapy-in-the-delivery-room-what-is-the-right-dose
#14
REVIEW
Vishal Kapadia, Myra H Wyckoff
Oxygen is the most commonly used medicine used during neonatal resuscitation in the delivery room. Oxygen therapy in delivery room should be used judiciously to avoid oxygen toxicity while delivering sufficient oxygen to prevent hypoxia. Measurement of appropriate oxygenation relies on pulse oximetry, but adequate ventilation and perfusion are equally important for oxygen delivery. In this article, we review oxygenation while transitioning from fetal to neonatal life, the importance of appropriate oxygen therapy, its measurement in the delivery room, and current recommendations for oxygen therapy and its limitations...
June 2018: Clinics in Perinatology
https://www.readbyqxmd.com/read/29742585/cardiac-arrest-in-patients-managed-for-convulsive-status-epilepticus-characteristics-predictors-and-outcome
#15
Stephane Legriel, Edouard Bresson, Nicolas Deye, David Grimaldi, Bertrand Sauneuf, Olivier Lesieur, Jean-Baptiste Lascarrou, Laurent Argaud, Jonathan Chelly, Pascal Beuret, David Schnell, Anne-Laure Chateauneuf, Mathilde Holleville, François Perier, Virginie Lemiale, Cedric Bruel, Pierrick Cronier, Nicolas Pichon, Nicolas Mongardon, Nicolas de-Prost, Florence Dumas, Alain Cariou
OBJECTIVES: Cardiac arrest is a catastrophic event that may arise during the management of convulsive status epilepticus. We aimed to report the clinical characteristics, outcomes, and early predictors of convulsive status epilepticus-related cardiac arrest. DESIGN: Retrospective multicenter study. SETTING: Seventeen university or university affiliated participating ICUs in France and Belgium. PATIENTS: Consecutive patients admitted to the participating ICUs for management of successfully resuscitated out-of-hospital cardiac arrest complicating the initial management of convulsive status epilepticus between 2000 and 2015...
May 8, 2018: Critical Care Medicine
https://www.readbyqxmd.com/read/29741919/efficacy-of-acupuncture-treatment-for-improving-the-respiratory-status-in-patients-receiving-prolonged-mechanical-ventilation-in-intensive-care-units-a-retrospective-observational-study
#16
Jun Matsumoto-Miyazaki, Hiroaki Ushikoshi, Kodai Suzuki, Nagisa Miyazaki, Takahide Nawa, Hideshi Okada, Shozo Yoshida, Ichijiro Murata, Shinji Ogura, Shinya Minatoguchi
BACKGROUND AND OBJECTIVE: Patients in critical care settings often require prolonged mechanical ventilation (MV) therapy and, occasionally, they cannot be weaned from MV. The authors evaluated the efficacy of acupuncture treatment for improving the respiratory status and promoting successful weaning from prolonged MV in patients at intensive care units (ICUs). DESIGN: Retrospective observational study. SETTING: Gifu University Hospital, Gifu, Japan...
May 9, 2018: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/29734568/carboxyhemoglobin-a-primer-for-clinicians
#17
Neil B Hampson
One of carbon monoxide's several mechanisms of toxicity is binding with circulating hemoglobin to form carboxyhemoglobin, resulting in a functional anemia. While patients with carbon monoxide poisoning are often said to be "cherry-red," such discoloration is rarely seen. Carboxyhemoglobin levels cannot be measured with conventional pulse oximetry, can be approximated with pulse CO-oximetry, and are most accurately measured with a laboratory CO-oximeter. Carboxyhemoglobin levels are quite stable and can be accurately measured on a transported blood sample...
March 2018: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/29731786/an-update-work-of-pulse-oximetry-screening-for-detecting-critical-congenital-heart-disease-in-the-newborn
#18
A Taksande, R Meshram, A Lohakare, S Purandare, U Biyani, J Vagha
Background: Congenital Heart Disease (CHD) is the commonest group of congenital malformations and affects 7-8 per 1000 live born newborns. Nevertheless, it is estimated that more than 50% of babies with undiagnosed CHD are not detected by routine neonatal cardiac examination. Aim: To find the incidence of CHD in newborns and to determine the accuracy of pulse oximetry for detecting clinically unrecognized critical congenital heart disease (CCHD) in the newborns...
July 2017: Images in Paediatric Cardiology
https://www.readbyqxmd.com/read/29716488/a-two-centre-observational-study-of-simultaneous-pulse-oximetry-and-arterial-oxygen-saturation-recordings-in-intensive-care-unit-patients
#19
S J Ebmeier, M Barker, M Bacon, R C Beasley, R Bellomo, C Knee Chong, G M Eastwood, J Gilchrist, H Kagaya, J Pilcher, S K Reddy, E Ridgeon, N Sarma, S Spragas, A Tanaka, M Tweedie, M Weatherall, P J Young
The influence of variables that might affect the accuracy of pulse oximetry (SpO<sub>2</sub>) recordings in critically ill patients is not well established. We sought to describe the relationship between paired SpO<sub>2</sub>/SaO<sub>2</sub> (oxygen saturation via arterial blood gas analysis) in adult intensive care unit (ICU) patients and to describe the diagnostic performance of SpO<sub>2</sub> in detecting low SaO<sub>2</sub> and PaO<sub>2</sub>...
May 2018: Anaesthesia and Intensive Care
https://www.readbyqxmd.com/read/29709397/prognosis-value-of-partial-arterial-oxygen-pressure-in-patients-with-septic-shock-subjected-to-pre-hospital-invasive-ventilation
#20
Romain Jouffroy, Anastasia Saade, Laure Castres Saint Martin, Pascal Philippe, Pierre Carli, Benoit Vivien
OBJECTIVE: Mechanical ventilation can help improve the prognosis of septic shock. While adequate delivery of oxygen to the tissue is crucial, hyperoxemia may be deleterious. Invasive out-of-hospital ventilation is often promptly performed in life-threatening emergencies. We propose to determine whether the arterial oxygen pressure (PaO2 ) at the intensive care unit (ICU) admission is associated with mortality in patients with septic shock subjected to pre-hospital mechanical ventilation...
April 24, 2018: American Journal of Emergency Medicine
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