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Pulse oximetry

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https://www.readbyqxmd.com/read/28542050/low-spo2-with-normal-sao2-during-general-anesthesia-a-case-report
#1
Stefan Brugger, Maria-Dolores Santafé-Marti, Malika Lakhal
A 25-year-old Caucasian man with a history of spherocytosis, splenectomy, recurrent blood transfusion, and no cardiopulmonary disease presented for an emergent laparoscopic cholecystectomy with a baseline pulse oximetric saturation (SpO2) of 88% while breathing room air. The SpO2 increased to only 89% during preoxygenation with an FIO2 1.0. Multiple arterial blood samples revealed SaO2 as high as 100% with PaO2 averaging 390 mm Hg. He was subsequently diagnosed with a dyshemoglobin, hemoglobin Köln. The simultaneous presentation of a stable patient from a cardiopulmonary perspective with normal arterial oxygen tension and saturation in the blood gas analyses despite a low SpO2 measurement outlines the importance of integrating the history of present illness and both the importance and the limitation of the pulse oximetry...
May 23, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28539140/hemoglobin-oxygen-saturation-with-mild-hypoxia-and-microgravity
#2
Johnny Conkin, James H Wessel, Jason R Norcross, Omar S Bekdash, Andrew F J Abercromby, Matthew D Koslovsky, Michael L Gernhardt
INTRODUCTION: Microgravity (μG) exposure and even early recovery from μG in combination with mild hypoxia may increase the alveolar-arterial oxygen (O2) partial pressure gradient. METHODS: Four male astronauts on STS-69 (1995) and four on STS-72 (1996) were exposed on Earth to an acute sequential hypoxic challenge by breathing for 4 min 18.0%, 14.9%, 13.5%, 12.9%, and 12.2% oxygen-balance nitrogen. The 18.0% O2 mixture at sea level resulted in an inspired O2 partial pressure (PIo2) of 127 mmHg...
June 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28527965/perfusion-index-an-indicator-of-success-during-endoscopic-thoracic-sympathectomy-for-hyperhidrosis
#3
Eric I-Hun Jeng, Nikolaus Gravenstein, Charles T Klodell
BACKGROUND: Endoscopic thoracic sympathectomy (ETS) is indicated for refractory hyperhidrosis. The pulse oximetry-derived perfusion index (PI) quantifies pulsatile blood flow at the oximeter. Thoracic sympathectomy increases blood flow; thus we postulate it will reliably increase PI. We evaluated the ipsilateral finger PI as a predictor of successful sympathectomy during ETS. METHODS: After institutional review board approval and informed consent, 100 adult patients undergoing bilateral ETS were studied...
May 17, 2017: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/28527475/the-oximapa-study-hypertension-control-by-abpm-and-association-with-sleep-apnea-syndrome-by-pulse-oximetry
#4
Tiago Maricoto, Eurico Alves Rodrigues Silva, Pedro Damião, José Mesquita Bastos
INTRODUCTION: Ambulatory blood pressure monitoring by automatic device is the best blood pressure evaluation method and sleep apnea syndrome is the leading cause of poor control. Oximetry allows screening these individuals but its usefulness has been poorly explored in Primary Health Care. The aim was to evaluate the blood pressure control at the office and with ambulatory blood pressure monitoring by automatic device and to relate it to sleep apnea syndrome. MATERIAL AND METHODS: We selected a sample of 50 participants, representative of 3036 hypertensive patients...
February 27, 2017: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/28525513/an-observational-assessment-of-anesthesia-capacity-in-madagascar-as-a-prerequisite-to-the-development-of-a-national-surgical-plan
#5
Linden S Baxter, Vaonandianina A Ravelojaona, Hasiniaina N Rakotoarison, Alison Herbert, Emily Bruno, Kristin L Close, Vanessa Andean, Hery H Andriamanjato, Mark G Shrime, Michelle C White
BACKGROUND: The global lack of anesthesia capacity is well described, but country-specific data are needed to provide country-specific solutions. We aimed to assess anesthesia capacity in Madagascar as part of the development of a Ministry of Health national surgical plan. METHODS: As part of a nationwide surgical safety quality improvement project, we surveyed 19 of 22 regional hospitals, representing surgical facilities caring for 75% of the total population. The assessment was divided into 3 areas: anesthesia workforce density, infrastructure and equipment, and medications...
June 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28514777/direct-measurement-of-tissue-oxygenation-in-neonates-via-resonance-raman-spectroscopy-a-pilot-study
#6
Anjali Iyengar, Andrew Gaillardetz, Hocine Tighiouart, Betsabee Castillo, Padraic Romfh, Jonathan M Davis
BACKGROUND: The ability to monitor tissue oxygenation in neonates remains a challenge due to limited blood supply and the reliance on invasive procedures. Resonance Raman spectroscopy noninvasively measures tissue oxygenation (RRS-StO2). Peripheral tissue oxygenation using this novel technology has not been described in neonates. OBJECTIVES: To examine the relationship between short-term RRS-StO2 measurements and central venous saturation (ScvO2) and pulse oximetry (SpO2) in preterm and term neonates...
May 18, 2017: Neonatology
https://www.readbyqxmd.com/read/28511435/agreement-and-correlation-between-arterial-and-central-venous-blood-gas-following-coronary-artery-bypass-graft-surgery
#7
Masoumeh Esmaeilivand, Alireza Khatony, Gholamreza Moradi, Farid Najafi, Alireza Abdi
INTRODUCTION: Arterial blood sampling, used to assess patients in acute conditions, may result in complications such as thrombosis and embolism. However, it can be replaced by venous blood sampling, but there is a dearth of information on this. AIM: To assess the correlation and agreement between the arterial and central venous blood gases analyses in patients undergoing elective Coronary Artery Bypass Graft (CABG) surgery. MATERIALS AND METHODS: In this cross-sectional study, 100 ICU patients undergoing elective CABG surgery were recruited...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28504991/tablet-e-logbooks-four-thousand-clinical-cases-and-complications-e-logged-by-14-nondoctor-anesthesia-providers-in-nepal
#8
Shristi Shah, Oliver Ross, Stephen Pickering, Stephen Knoble, Indra Rai
BACKGROUND: To meet the need for essential surgery across rural Nepal, anesthesia at district level is delivered by nondoctor anesthetists. They require support to maintain confidence and competence, and upgraded professional registration to secure their status. To meet these needs, a distance-blended learning course was pioneered and delivered. A core course requirement was to log all clinical cases; these were logged on a new e-logbook. METHODS: Fourteen nondoctor anesthesia providers working in 12 different districts across Nepal were enrolled in the 1-year course...
May 11, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28500462/perfusion-index-and-left-ventricular-output-correlation-in-healthy-term-infants
#9
Iuri Corsini, Alessandra Cecchi, Caterina Coviello, Carlo Dani
Perfusion index (PI) is a non-invasive marker of peripheral perfusion which is detected by an oximeter. We aimed to assess the correlation between PI and left ventricular output (LVO) in healthy term infants at the time of the screening for congenital heart disease (CHD). PI was measured at 48 ± 2 h of life in the infant's right hand (PIrh) and in 1 foot (PIf) contemporary to SpO2 for CHD screening. Heart ultrasound was performed immediately after the screening procedure for measuring LVO. Forty-nine healthy term infants were studied...
May 12, 2017: European Journal of Pediatrics
https://www.readbyqxmd.com/read/28496021/feasibility-and-safety-of-transulnar-catheterization-in-ipsilateral-radial-artery-occlusion
#10
Shu-Kai Hsueh, Cheng-I Cheng, Hsiu-Yu Fang, Mostafa Mohammad Omran, Wen-Hao Liu, Wen-Jung Chung, Chien-Jen Chen, Cheng-Hsu Yang, Chih-Yuan Fang, Chiung-Jen Wu
To investigate the postprocedural cardiovascular events and vascular outcomes, including hand ischemia and neurological compromise, after transulnar (TU) catheterization in ipsilateral radial artery occlusion.Previous randomized trials have shown that the transulnar (TU) approach for coronary angiogram and intervention has safety and outcomes similar to those of the transradial (TR) approach. However, the safety of the TU procedure when ipsilateral radial artery occlusion occurs is unknown.We retrospectively reviewed 87 TU cases with ipsilateral radial artery occlusion confirmed by a forearm angiogram...
May 12, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28489830/-clinical-and-laboratory-characteristics-of-patients-with-pulmonary-hypertension-and-pulmonary-vascular-complications-hospitalized-at-the-instituto-nacional-de-salud-del-ni%C3%A3-o
#11
Alexis Jose Ormeño Julca, Carlos Melchor Alvarez Murillo, Pedro Miguel Amoretti Alvino, Angel Aladino Florian Florian, Rosa Aurora Castro Johanson, Maria Danisa Celi Perez, Olga Rocío Huamán Prado
The hepatopulmonary syndrome (HPS) and portopulmonary hypertension (PPHN) are distinct pulmonary vascular complications of portal hypertension (PHT) and are associated with increased morbidity and mortality. OBJECTIVES: To describe the clinical and laboratory characteristics of patients with pulmonary hypertension and pulmonary vascular complications hospitalized at the Instituto Nacional de Salud del Niño. MATERIALS AND METHODS: We included patients with HTP hospitalized from January 2012 to June 2013 and that during its evolution progressed with SHP or HTPP...
January 2017: Revista de Gastroenterología del Perú: órgano Oficial de la Sociedad de Gastroenterología del Perú
https://www.readbyqxmd.com/read/28484354/implementation-of-congenital-heart-diseases-screening-at-the-bihac-cantonal-hospital
#12
Mediha Kardasevic, Ida Jovanovic, Jelica Predojevic Samardzic
INTRODUCTION: Congenital heart defects (CHD) were the most common birth defects, and the most common cause of death in infants with congenital anomalies in developed countries. Early detection of these anomalies would greatly enhance the effect of therapeutic procedures and the final outcome. Lately, pulse oximetry (PO) is used for the purpose of screening the cyanotic congenital heart defects. PO in combination with the clinical examination has greater diagnostic sensitivity in detection of CHD...
March 2017: Materia Socio-medica
https://www.readbyqxmd.com/read/28483245/the-watch-pat-in-pediatrics-sleep-disordered-breathing-pilot-study-on-children-with-negative-nocturnal-pulse-oximetry
#13
Agostino Serra, Salvatore Cocuzza, Luigi Maiolino, Alessandro Abramo, Giacomo Spinato, Giovanni Tonoli, Maurizio Amadori, Doriano Politi, Giancarlo Tirelli, Roberto Spinato, Paola Di Mauro
OBJECTIVES: The main purpose of this study was to determine the efficacy of Watch-PAT in Pediatric Sleep Disordered Breathing (PSDB) diagnosis in children with symptoms suggestive of PSDB, in which the nocturnal pulse oximetry was negative according to the Brouilette criteria. METHODS: We enrolled 28 patients aged between 5 and 12 years (mean age: 7.75 ± 1.69), who underwent the registration with Watch-PAT, that utilizes the Peripheral Arterial Tone (PAT), AHI, RDI, body position, snoring, pulse oximetry and actigraphy...
June 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28483178/-identifying-sleep-apnoea-and-hypopnoea-episodes-from-respiratory-polygraphy-signals
#14
Dayana Lizethe Guzmán Sierra, Mariano Carreño León, Luz Helena Camargo Casallas
OBJECTIVE: To design a diagnostic support system for sleep apnoea and hypopnoea syndrome (SAHS) using moving average based on knowledge, able to identify SAHS episodes from a respiratory polygraphy (RP) database. METHODS: An analysis was made of data obtained from a public database, that included the RP signals, nasobucal airflow, thoracoabdominal movement, and pulse oximetry of 23 patients between 28 and 68 years with suspected SAHS, and with a body mass index (BMI) from 25...
April 2017: Revista Colombiana de Psiquiatría
https://www.readbyqxmd.com/read/28481126/increased-levels-of-alveolar-and-airway-exhaled-nitric-oxide-in-runners
#15
Alexandra Thornadtsson, Nikola Drca, Fabio Ricciardolo, Marieann Högman
AIM: The objective of this study was to apply extended NO analysis for measurements of NO dynamics in the lung, divided into alveolar and airway contribution, in amateur runners and marathoners. METHODS: The athletes participated in either a marathon or a half marathon. The athletes self-reported their age, weight, height, training distance per week, competing distance, cardio-pulmonary health, atopic status, and use of tobacco. Measurements of exhaled NO (FENO) with estimation of alveolar NO (CANO) and airway flux (JawNO), ventilation, pulse oximetry, and peak flow were performed before, immediately after, and 1 hour after completing the race...
May 8, 2017: Upsala Journal of Medical Sciences
https://www.readbyqxmd.com/read/28476457/recognition-and-treatment-of-sleep-disordered-breathing-in-obese-hospitalized-patients-may-improve-survival-the-hosmed-database
#16
Sunil Sharma, Umer Mukhtar, Colleen Kelly, Paul Mather, Stuart F Quan
PURPOSE: Sleep disordered breathing is a common sleep disorder. Recent studies have shown that hospitalized obese patients have a high likelihood of unrecognized Sleep disordered breathing. However, no systematic large study has so far evaluated the outcomes of a screening program. This study provides demographic, clinical and outcome data from a screening program at a tertiary care academic center. METHODS: Subjects were 5062 patients screened from March 2013 to July 2016...
May 2, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28476166/predictors-of-failure-of-dise-directed-adenotonsillectomy-in-children-with-sleep-disordered-breathing
#17
Noura Alsufyani, Andre Isaac, Manisha Witmans, Paul Major, Hamdy El-Hakim
BACKGROUND: Adenotonsillectomy (AT) is the most commonly performed procedure for sleep disordered breathing (SDB) in pediatrics. However, 20-40% of patients will have persistent signs and symptoms of SDB after AT. Drug-induced sleep endoscopy (DISE) has the potential to individualize surgical treatments and avoid unnecessary or unsuccessful surgeries. The objective of this study was to determine the predictors of failure of DISE-directed adenoidectomy and/or tonsillectomy in otherwise healthy children with SDB...
May 5, 2017: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28471970/evaluation-of-pulse-oximeter-derived-photoplethysmographic-signals-for-obstructive-sleep-apnea-diagnosis
#18
Yan Li, He Gao, Yan Ma
High prevalence of obstructive sleep apnea (OSA) has increased the demands for more convenient and accessible diagnostic devices other than standard in-lab polysomnography (PSG). Despite the increasing utility of photoplethysmograph (PPG), it remains understudied in underserved populations. This study aimed to evaluate the reliability of a standard pulse oximeter system with an automated analysis based on the PPG signal for the diagnosis of OSA, as compared with PSG derived measures.Consecutive out-patients with suspect OSA completed a PPG monitoring simultaneous with an overnight in-lab standard PSG...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28470831/physiological-effects-of-titrated-oxygen-via-nasal-high-flow-cannulae-in-copd-exacerbations-a-randomized-controlled-cross-over-trial
#19
Janine Pilcher, Leonie Eastlake, Michael Richards, Sharon Power, Terrianne Cripps, Susan Bibby, Irene Braithwaite, Mark Weatherall, Richard Beasley
BACKGROUND AND OBJECTIVE: Increased arterial carbon dioxide tension (PaCO2 ) is an important complication of acute exacerbations of COPD. The effects of nasal high-flow cannulae (NHF) on PaCO2 in patients with COPD exacerbations, and whether this therapy should be used in this clinical situation, are less certain. We aimed to investigate the effect of NHF on PaCO2 in patients admitted to hospital with a COPD exacerbation. METHODS: We performed a single-centre randomized controlled cross-over trial in 24 hospital inpatients with acute exacerbations of COPD receiving oxygen via standard nasal prongs (SNPs)...
May 4, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28464700/accuracy-of-smartphone-apps-for-heart-rate-measurement
#20
Thomas Coppetti, Andreas Brauchlin, Simon Müggler, Adrian Attinger-Toller, Christian Templin, Felix Schönrath, Jens Hellermann, Thomas F Lüscher, Patric Biaggi, Christophe A Wyss
Background Smartphone manufacturers offer mobile health monitoring technology to their customers, including apps using the built-in camera for heart rate assessment. This study aimed to test the diagnostic accuracy of such heart rate measuring apps in clinical practice. Methods The feasibility and accuracy of measuring heart rate was tested on four commercially available apps using both iPhone 4 and iPhone 5. 'Instant Heart Rate' (IHR) and 'Heart Fitness' (HF) work with contact photoplethysmography (contact of fingertip to built-in camera), while 'Whats My Heart Rate' (WMH) and 'Cardiio Version' (CAR) work with non-contact photoplethysmography...
January 1, 2017: European Journal of Preventive Cardiology
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