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Pulse oximetry

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https://www.readbyqxmd.com/read/29342191/changes-in-balance-and-joint-position-sense-during-a-12-day-high-altitude-trek-the-british-services-dhaulagiri-medical-research-expedition
#1
Sarah B Clarke, Kevin Deighton, Caroline Newman, Gareth Nicholson, Liam Gallagher, Christopher J Boos, Adrian Mellor, David R Woods, John P O'Hara
Postural control and joint position sense are essential for safely undertaking leisure and professional activities, particularly at high altitude. We tested whether exposure to a 12-day trek with a gradual ascent to high altitude impairs postural control and joint position sense. This was a repeated measures observational study of 12 military service personnel (28±4 years). Postural control (sway velocity measured by a portable force platform) during standing balance, a Sharpened Romberg Test and knee joint position sense were measured, in England (113m elevation) and at 3 research camps (3619m, 4600m and 5140m) on a 12-day high altitude trek in the Dhaulagiri region of Nepal...
2018: PloS One
https://www.readbyqxmd.com/read/29338120/the-association-between-different-features-of-sleep-disordered-breathing-and-blood-pressure-a-cross-sectional-study
#2
Shayan Khoshkish, Mathias Hohl, Benedikt Linz, Michael Arzt, Felix Mahfoud, Mathias Baumert, Jakob Schöpe, Michael Böhm, Dominik Linz
Sleep disordered breathing (SDB) is highly prevalent in patients with high blood pressure (BP). Severity of SDB can be evaluated by the number of apneas and hypopneas per hour (AHI) or by measures of hypoxia. The objective of this study was to assess the association between different measures of SDB and BP. In 134 consecutive patients, polygraphy was performed to determine the AHI. Pulse oximetry was used to determine hypoxemic burden (time below 90% oxygen saturation [T90] and hypoxia load [HL], representing the integrated area above the curve of desaturation)...
January 16, 2018: Journal of Clinical Hypertension
https://www.readbyqxmd.com/read/29337728/continuous-pulse-oximetry-does-not-measure-blood-pressure
#3
Frank J Overdyk, Suzanne J L Broens
No abstract text is available yet for this article.
January 15, 2018: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29335914/accuracy-and-trending-of-non-invasive-hemoglobin-measurement-during-different-volume-and-perfusion-statuses
#4
Abdelmoneim Adel, Wael Awada, Bassant Abdelhamid, Heba Omar, Omnia Abd El Dayem, Ahmed Hasanin, Ashraf Rady
The evolution of non-invasive hemoglobin measuring technology would save time and improve transfusion practice. The validity of pulse co-oximetry hemoglobin (SpHb) measurement in the perioperative setting was previously evaluated; however, the accuracy of SpHb in different volume statuses as well as in different perfusion states was not well investigated. The aim of this work is to evaluate the accuracy and trending of SpHb in comparison to laboratory hemoglobin (Lab-Hb) during acute bleeding and after resuscitation...
January 15, 2018: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29330589/impact-of-valve-less-vs-standard-insufflation-on-pneumoperitoneum-volume-inflammation-and-peritoneal-physiology-in-a-laparoscopic-sigmoid-resection-experimental-model
#5
Michele Diana, Eric Noll, Andras Legnèr, Seong-Ho Kong, Yu-Yin Liu, Luigi Schiraldi, Francesco Marchegiani, Jordan Bano, Bernard Geny, Anne-Laure Charles, Bernard Dallemagne, Véronique Lindner, Didier Mutter, Pierre Diemunsch, Jacques Marescaux
BACKGROUND: Standard insufflators compensate for intra-abdominal pressure variations with pressure spikes. Our aim was to evaluate the impact of a stable, low-pressure pneumoperitoneum induced by a valve-less insufflator, on working space, hemodynamics, inflammation, and peritoneal physiology, in a model of laparoscopic sigmoid resection. MATERIALS AND METHODS: Twelve pigs (47 ± 3.3 kg) were equipped for invasive hemodynamic monitoring and randomly assigned to Standard (n = 6) vs...
January 12, 2018: Surgical Endoscopy
https://www.readbyqxmd.com/read/29327348/respiratory-dysfunction-progresses-with-age-in-kcna1-null-mice-a-model-of-sudden-unexpected-death-in-epilepsy
#6
Kristina A Simeone, Jodi Hallgren, Charles S Bockman, Ankita Aggarwal, Vikash Kansal, Lauren Netzel, Shruthi H Iyer, Stephanie A Matthews, Malavika Deodhar, Peter J Oldenburg, Peter W Abel, Timothy A Simeone
OBJECTIVE: Increased breathing rate, apnea, and respiratory failure are associated with sudden unexpected death in epilepsy (SUDEP). We recently demonstrated the progressive nature of epilepsy and mortality in Kcna1-/- mice, a model of temporal lobe epilepsy and SUDEP. Here we tested the hypothesis that respiratory dysfunction progresses with age in Kcna1-/- mice, thereby increasing risk of respiratory failure and sudden death (SD). METHODS: Respiratory parameters were determined in conscious mice at baseline and following increasing doses of methacholine (MCh) using noninvasive airway mechanics (NAM) systems...
January 12, 2018: Epilepsia
https://www.readbyqxmd.com/read/29327119/nocturnal-hypoxemic-burden-is-associated-with-epicardial-fat-volume-in-patients-with-acute-myocardial-infarction
#7
Dominik Linz, Stefan Colling, Wolfgang Nußstein, Kurt Debl, Mathias Hohl, Claudia Fellner, Michael Böhm, Lars S Maier, Okka W Hamer, Stefan Buchner, Michael Arzt
BACKGROUND: Increased epicardial fat volume (EFV) is a common feature of patients with sleep-disordered breathing (SDB), is considered as an established marker of cardiovascular risk, and is associated with adverse cardiovascular events after myocardial infarction (MI). METHODS: To investigate the association between different measures of SDB severity and EFV after acute MI, we enrolled 105 patients with acute MI in this study. Unattended in-hospital polysomnography was performed to determine the number of apneas and hypopneas per hour during sleep (apnea-hypopnea index, AHI)...
January 11, 2018: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29317764/cerebral-oxygenation-during-umbilical-arterial-blood-sampling-in-very-low-birth-weight-neonates
#8
Jonathan P Mintzer, Catherine Messina
OBJECTIVE: Umbilical arterial blood sampling (UABS) has been associated with cerebral oxygen saturation (CrSO2) decrements in very low birth weight (VLBW) neonates. We sought to determine patient- and UABS procedure-related factors contributing to this effect. STUDY DESIGN: In this prospective cohort study, cerebral near-infrared spectroscopy was performed during UABS procedures in VLBW neonates. Analyses were conducted to determine subject- and procedure-related factors correlating with CrSO2 decrements...
January 9, 2018: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/29302896/comparison-of-the-accuracy-of-noninvasive-hemoglobin-monitoring-for-preoperative-evaluation-between-adult-and-pediatric-patients-a-retrospective-study
#9
Yong-Hee Park, Seho Lim, Hyun Kang, Hwa-Yong Shin, Chong Wha Baek, Young Cheol Woo
We measured noninvasive hemoglobin (SpHb) levels during the pre-anesthesia visit in patients planning elective surgery. Differences between SpHb and laboratory-measured hemoglobin (Hblab) were compared between adult and pediatric patients. In the pre-anesthesia visiting office, we routinely monitor noninvasive Hb levels with oxygen saturation and heart rate using Masimo Radical-7® Pulse CO-Oximetry (Masimo Corp., Irvine, CA, USA). We attached the R1 20 (body weight, 10-50 kg) or R1 25 (body weight > 30 kg) probe on the index finger...
January 4, 2018: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29295578/devices-for-ambulatory-monitoring-of-sleep-associated-disorders-in-children-with-neurological-diseases
#10
Adriana Ulate-Campos, Melissa Tsuboyama, Tobias Loddenkemper
Good sleep quality is essential for a child's wellbeing. Early sleep problems have been linked to the later development of emotional and behavioral disorders and can negatively impact the quality of life of the child and his or her family. Sleep-associated conditions are frequent in the pediatric population, and even more so in children with neurological problems. Monitoring devices can help to better characterize sleep efficiency and sleep quality. They can also be helpful to better characterize paroxysmal nocturnal events and differentiate between nocturnal seizures, parasomnias, and obstructive sleep apnea, each of which has a different management...
December 25, 2017: Children
https://www.readbyqxmd.com/read/29285649/carboxyhemoglobin-levels-induced-by-cigarette-smoking-outdoors-in-smokers
#11
Jonathan Schimmel, Naomi George, John Schwarz, Sami Yousif, Selim Suner, Jason B Hack
INTRODUCTION: Non-invasive screening of carboxyhemoglobin saturation (SpCO) in the emergency department to detect occult exposure is increasingly common. The SpCO threshold to consider exposure in smokers is up to 9%. The literature supporting this cutoff is inadequate, and the impact of active smoking on SpCO saturation remains unclear. The primary objective was to characterize baseline SpCO in a cohort of smokers outdoors. Secondary objectives were to explore the impact of active smoking on SpCO and to compare SpCO between smokers and non-smokers...
December 28, 2017: Journal of Medical Toxicology: Official Journal of the American College of Medical Toxicology
https://www.readbyqxmd.com/read/29281194/the-dewey-monitor-pulse-oximetry-can-independently-detect-hypoxia-in-a-rebreather-diver
#12
Rachel M Lance, Michael J Natoli, Sophia A S Dunworth, John J Freiberger, Richard E Moon
Rebreather diving has one of the highest fatality rates per man hour of any diving activity in the world. The leading cause of death is hypoxia, typically from equipment or procedural failures. Hypoxia causes very few symptoms prior to causing loss of consciousness. Additionally, since the electronics responsible for controlling oxygen levels in rebreathers often control their alarm systems, frequently divers do not receive any external warnings. This study investigated the use of a forehead pulse oximeter as an independent warning device in the event of rebreather failure...
November 2017: Undersea & Hyperbaric Medicine: Journal of the Undersea and Hyperbaric Medical Society, Inc
https://www.readbyqxmd.com/read/29277336/prognostic-value-of-nocturnal-pulse-oximetry-in-patients-with-heart-failure
#13
Ricardo Rivera-López, Laura Jordán-Martínez, Silvia López-Fernández, Ricardo Rivera-Fernandez, Luis Tercedor, Germán Sáez-Roca
INTRODUCTION AND OBJECTIVES: To analyze the prognostic value of nocturnal hypoxemia measured with portable nocturnal pulse-oximetry in patients hospitalized due to heart failure and its relation to mortality and hospital readmission. METHODS: We included 38 patients who were admitted consecutively to our unit with the diagnosis of decompensated heart failure. Pulse-oximetry was considered positive for hypoxemia when more than 10 desaturations per hour were recorded during sleep...
December 22, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/29272974/home-oxygen-therapy-re-thinking-the-role-of-devices
#14
Andrea S Melani, Piersante Sestini, Paola Rottoli
A range of devices are available for delivering and monitoring home oxygen therapy (HOT). Guidelines do not give indications for the choice of the delivery device but recommend the use of an ambulatory system in subjects on HOT whilst walking. Areas covered: We provide a clinical overview of HOT and review traditional and newer delivery and monitoring devices for HOT. Despite relevant technology advancements, clinicians, faced with many challenges when they prescribe oxygen therapy, often remain familiar to traditional devices and continuous flow delivery of oxygen...
January 4, 2018: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/29258784/methemoglobinemia-in-a-case-of-paint-thinner-intoxication-treated-successfully-with-vitamin-c
#15
Deba Prasad Dhibar, Kamal Kant Sahu, Sanjay Jain, Savita Kumari, Subhash Chander Varma
BACKGROUND: Methemoglobin (MetHb) is an oxidized form of hemoglobin. It is a poor transporter of oxygen and is unable to deliver oxygen to the tissue. Globally, drug & toxin induced methemoglobinemia is more common as compared with the congenital form. Methemoglobinemia caused by paint thinner intoxication is rare. Methylene blue is well established as the first-line therapy for severe methemoglobinemia. CASE REPORT: A 25-year old man was brought to the Emergency Department after accidental consumption of paint thinner...
December 16, 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29251031/correlation-between-time-lag-of-arterial-plethysmographic-waveforms-and-systemic-vascular-resistance-a-prospective-study
#16
Radhakrishnan Muthuchellappan, Ramesh V J, Umamaheswara Rao Ganne S, Thennarasu K, Anjana Jacob, Sripathy G, Bhadrinarayan V, Mohanvelu K
Blood pressure (BP), a surrogate of cardiac output (CO), is also dependent on systemic vascular resistance (SVR). But SVR is not routinely monitored in daily clinical practice. We hypothesise that the time difference between the peripheral arterial waveform and the finger plethysmographic waveform (time lag index - TLi) could indicate the systemic vascular resistance. In this study, we correlated TLi with the systemic vascular resistance measured by minimally invasive CO monitor (pulse contour analysis). SVR changes in response to administration of mannitol were studied...
December 18, 2017: Journal of Medical Engineering & Technology
https://www.readbyqxmd.com/read/29246256/effect-of-oral-glycine-on-the-clinical-spirometric-and-inflammatory-status-in-subjects-with-cystic-fibrosis-a-pilot-randomized-trial
#17
Mario H Vargas, Rosangela Del-Razo-Rodríguez, Amando López-García, José Luis Lezana-Fernández, Jaime Chávez, María E Y Furuya, Juan Carlos Marín-Santana
BACKGROUND: Patients with cystic fibrosis (CF) have airway inflammation that contributes to symptoms and to pulmonary function derangement. Current drugs used to diminish airway inflammation improve the clinical and spirometric status of patients with CF, but their use is limited due to their undesired side effects, for example, glucose intolerance, growth retardation, and cataracts with corticosteroids, gastrointestinal toxicity with ibuprofen, and macrolide resistance with azythromycin...
December 15, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29243086/utility-of-pulse-oximetry-to-detect-aspiration-an-evidence-based-systematic-review
#18
REVIEW
Deanna Britton, Amy Roeske, Stephanie K Ennis, Joshua O Benditt, Cassie Quinn, Donna Graville
Pulse oximetry is a commonly used means to measure peripheral capillary oxyhemoglobin saturation (SpO2). Potential use of pulse oximetry to detect aspiration is attractive to clinicians, as it is readily available, quick, and noninvasive. However, research regarding validity has been mixed. This systematic review examining evidence on the use of pulse oximetry to detect a decrease in SpO2 indicating aspiration during swallowing is undertaken to further inform clinical practice in dysphagia assessment. A multi-engine electronic search was conducted on 8/25/16 and updated on 4/8/17 in accordance with standards published by the Preferred Reporting for Items for Systematic Reviews and Meta-Analysis Protocols (PRISMA)...
December 14, 2017: Dysphagia
https://www.readbyqxmd.com/read/29239951/the-clinical-utility-of-noninvasive-pulse-co-oximetry-hemoglobin-measurements-in-dark-skinned-critically-ill-patients
#19
Susan M Murphy, Shahed Omar
BACKGROUND: The primary objective of this study was to assess the clinical usefulness of a point-of-care device which measures hemoglobin noninvasively (SpHb) in a group of critically ill participants with dark skin pigmentation. METHODS: One hundred forty-six adult and pediatric participants from a multidisciplinary intensive care unit had intermittent readings of noninvasive hemoglobin measurements performed at a minimum of 4 hourly intervals. A total of 371 readings were analyzed...
December 11, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/29229100/sleep-related-respiratory-events-during-non-invasive-ventilation-of-patients-with-chronic-hypoventilation
#20
Sigurd Aarrestad, Magnus Qvarfort, Anne Louise Kleiven, Elin Tollefsen, Ole Henning Skjønsberg, Jean-Paul Janssens
BACKGROUND: Non-invasive ventilation (NIV) is increasingly used in the treatment of patients with chronic hypercapnic respiratory failure (CRF). Residual sleep related respiratory events under NIV such as obstructive or central apnea/hypopnea (AH), or patient-ventilator asynchrony (PVA), may compromise treatment efficacy and/or comfort. AIMS OF STUDY: 1/to quantify the frequency and describe the types of both AH and PVA in a large group of stable patients with CRF during night-time NIV; 2/to analyze the influence of these events on overnight pulse oximetry and transcutaneous CO2 and 3/to assess interrater agreement in identifying and quantifying AH and PVA...
November 2017: Respiratory Medicine
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