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https://www.readbyqxmd.com/read/28466202/four-wavelength-near-infrared-peripheral-oximetry-in-cardiac-surgery-patients-a-comparison-between-equanox-and-o3
#1
Arnaud Ferraris, Matthias Jacquet-Lagrèze, Jean-Luc Fellahi
Near-infrared spectroscopy (NIRS) is a continuous and noninvasive technology that measures regional tissue oxygen saturation (rSO2). A new 4-wavelength generation of NIRS monitors is now available. We aimed to compare peripheral somatic rSO2 values given by the 4-wavelength EQUANOX™ 7600 device (Nonin Medical Inc., Plymouth, Mn) and O3™ device (Masimo Corporation, Irvine, CA). Twenty adult patients scheduled for conventional elective cardiac surgery with cardiopulmonary bypass over a 4-month period were included after local Ethics Committee approval...
May 2, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28221201/influence-of-fraction-of-inspired-oxygen-on-noninvasive-hemoglobin-measurement-parallel-assessment-of-2-monitors
#2
Etienne Gayat, Nicolas Imbert, Ariane Roujansky, Léa Lemasle, Marc Fischler
BACKGROUND: Previous reports have brought specific attention to the relationship between oxygenation of the patient and the accuracy of noninvasive measurement of hemoglobin (Hb) using an optical sensor. This study aimed to assess prospectively the relationship between fraction of inspired oxygen (FIO2) and the bias of the measurement of Hb by the use of 2 different noninvasive monitors compared with the classic invasive technique. METHODS: Forty-four patients were included prospectively...
June 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28170445/validation-of-masimo-pronto-7-and-hemocue-201-for-hemoglobin-determination-in-children-from-1-to-5-years-of-age
#3
Teresa Shamah Levy, Ignacio Méndez-Gómez-Humarán, María Del Carmen Morales Ruán, Brenda Martinez Tapia, Salvador Villalpando Hernández, Mauricio Hernández Ávila
OBJECTIVE: To evaluate the accuracy and precision of HemoCue 201 (HemoCue) and Masimo Pronto 7 (Masimo) devices for measuring hemoglobin (Hb) in epidemiological studies, having venous blood samples as a gold standard. MATERIAL AND METHODS: We measured Hb concentrations in a field sample of 148 children from one to five years of age. Masimo and HemoCue were used for capillary blood samples and an automatic analyzer for venous blood samples. Regression models with no intercept were constructed to measure precision and predictability, concordance correlations to measure accuracy and precision, and Bland-Altman limits of agreement as well as hierarchical linear models to estimate variance...
2017: PloS One
https://www.readbyqxmd.com/read/28106356/accuracy-of-non-invasive-hemoglobin-monitoring-by-pulse-co-oximeter-during-liver-transplantation
#4
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/28034464/noninvasive-hemoglobin-monitoring-in-critically-ill-pediatric-patients-at-risk-of-bleeding
#5
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...
May 2017: 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
#6
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/27939107/the-effect-of-skin-pigmentation-on-the-accuracy-of-pulse-oximetry-in-infants-with-hypoxemia
#7
Elizabeth E Foglia, Robin K Whyte, Aasma Chaudhary, Antonio Mott, Jodi Chen, Kathleen J Propert, Barbara Schmidt
To compare pulse oximetry measurement bias between infants with hypoxemia with either dark skin or light skin with Masimo Radical 7 and Nellcor Oximax. There was no significant difference in systematic bias based on skin pigment for either oximeter.
March 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/27814710/methemoglobin-and-nitric-oxide-therapy-in-ugandan-children-hospitalized-for-febrile-illness-results-from-a-prospective-cohort-study-and-randomized-double-blind-placebo-controlled-trial
#8
Andrea L Conroy, Michael Hawkes, Kyla Hayford, Laura Hermann, Chloe R McDonald, Suparna Sharma, Sophie Namasopo, Robert O Opoka, Chandy C John, W Conrad Liles, Christopher Miller, Kevin C Kain
BACKGROUND: Exposure of red blood cells to oxidants increases production of methemoglobin (MHb) resulting in impaired oxygen delivery to tissues. There are no reliable estimates of methemoglobinemia in low resource clinical settings. Our objectives were to: i) evaluate risk factors for methemoglobinemia in Ugandan children hospitalized with fever (study 1); and ii) investigate MHb responses in critically ill Ugandan children with severe malaria treated with inhaled nitric oxide (iNO), an oxidant that induces MHb in a dose-dependent manner (study 2)...
November 4, 2016: BMC Pediatrics
https://www.readbyqxmd.com/read/27717357/perfusion-index-assessment-during-transition-period-of-newborns-an-observational-study
#9
Sezin Unal, Ebru Ergenekon, Selma Aktas, Serdar Beken, Nilgun Altuntas, Ebru Kazanci, Ferit Kulali, Ibrahim M Hirfanoglu, Esra Onal, Canan Turkyilmaz, Esin Koc, Yildiz Atalay
BACKGROUND: Perfusion index (PI) is becoming a part of clinical practice in neonatology to monitor peripheral perfusion noninvasively. Hemodynamic and respiratory changes occur in newborns during the transition period after birth in which peripheral perfusion may be affected. Tachypnea is a frequent symptom during this period. While some tachypneic newborns get well in less than 6 h and diagnosed as "delayed transition", others get admitted to intensive care unit which transient tachypnea of newborn (TTN) being the most common diagnosis among them...
October 7, 2016: BMC Pediatrics
https://www.readbyqxmd.com/read/27665572/evaluation-of-perfusion-index-as-a-tool-for-pain-assessment-in-critically-ill-patients
#10
Ahmed Hasanin, Sabah Abdel Raouf Mohamed, Akram El-Adawy
Pain is a common and undertreated problem in critically ill patients. Pain assessment in critically ill patients is challenging and relies on complex scoring systems. The aim of this work was to find out the possible role of the perfusion index (PI) measured by a pulse oximeter (Masimo Radical 7; Masimo Corp., Irvine, CA, USA) in pain assessment in critically ill patients. A prospective observational study was carried out on 87 sedated non-intubated patients in a surgical intensive care unit. In addition to routine monitoring, a Masimo pulse oximeter probe was used for PI measurement...
September 24, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27549603/methemoglobin-measurements-are-underestimated-by-the-radical-7-co-oximeter-experience-from-a-series-of-moderate-to-severe-propanil-poisonings
#11
COMPARATIVE STUDY
Elspeth Hulse, Fathima Shihana, Nicholas A Buckley
INTRODUCTION: In Asia methemoglobinemia (MetHb) is commonly caused through self-poisoning with the pesticide propranil. MetHb can cause hypoxia, coma and death, but usually responds to methylene blue. It is therefore vital to have accurate methods to measure blood MetHb to guide appropriate treatments. The gold standard to measure MetHb utilizes a spectrophotometer, but recent bedside tests have been developed e.g., pulse co-oximeter probe and blood color chart. METHODS: Nine propanil poisoned patients had data collected from hospitals in Sri Lanka during 2008...
November 2016: Clinical Toxicology
https://www.readbyqxmd.com/read/27501120/noninvasive-continuous-hemoglobin-monitoring-in-combat-casualties-a-pilot-study
#12
Elizabeth Bridges, Jennifer J Hatzfeld
OBJECTIVE: To describe the accuracy and precision of noninvasive hemoglobin measurement (SpHb) compared with laboratory or point-of-care Hb, and SpHb ability to trend in seriously injured casualties. METHODS: Observational study in a convenience sample of combat casualties undergoing resuscitation at two US military trauma hospitals in Afghanistan. SpHb was obtained using the Masimo Rainbow SET (Probe Rev E/Radical-7 Pulse CO-Oximeter v 7.6.2.1). Clinically indicated Hb was analyzed with a Coulter or iStat and compared with simultaneous SpHb values...
September 2016: Shock
https://www.readbyqxmd.com/read/27450027/evaluation-of-pleth-variability-index-as-a-predictor-of-fluid-responsiveness-during-orthotopic-liver-transplantation
#13
Huseyin Konur, Gulay Erdogan Kayhan, Huseyin Ilksen Toprak, Nizamettin Bucak, Mustafa Said Aydogan, Saim Yologlu, Mahmut Durmus, Sezai Yılmaz
Fluid management is challenging and still remains controversial in orthotopic liver transplantation (OLT). The pleth variability index (PVI) has been shown to be a reliable predictor of fluid responsiveness of perioperative and critically ill patients; however, it has not been evaluated in OLT. This study was designed to examine whether the PVI can reliably predict fluid responsiveness in OLT and to compare PVI with other hemodynamic indexes that are measured using the PiCCO2 monitoring system. Twenty-five patients were enrolled in this study...
July 2016: Kaohsiung Journal of Medical Sciences
https://www.readbyqxmd.com/read/27320555/pulse-oximeter-derived-pleth-variability-index-is-a-reliable-indicator-of-cardiac-preload-in-patients-undergoing-liver-transplantation
#14
H-C Lee, Y-F Tsai, H-I Tsai, P C-H Chung, H-P Yu, W-C Lee, C-C Lin
BACKGROUND: Accurate estimation of cardiac preload during liver transplantation is essential. The right ventricular end-diastolic volume index (RVEDVI) is recognized as a good preload indicator in patients undergoing liver transplantation. Recently, dynamic variation parameters including pleth variability index (PVI) have been used as predictors of fluid responsiveness. However, the correlation between PVI and preload status has not been well studied. We evaluated the relationship between PVI and RVEDVI during liver transplantation...
May 2016: Transplantation Proceedings
https://www.readbyqxmd.com/read/27270963/acoustic-sensor-versus-electrocardiographically-derived-respiratory-rate-in-unstable-trauma-patients
#15
Shiming Yang, Ashley Menne, Peter Hu, Lynn Stansbury, Cheng Gao, Nicolas Dorsey, William Chiu, Stacy Shackelford, Colin Mackenzie
Respiratory rate (RR) is important in many patient care settings; however, direct observation of RR is cumbersome and often inaccurate, and electrocardiogram-derived RR (RRECG) is unreliable. We asked how data derived from the first 15 min of RR recording after trauma center admission using a novel acoustic sensor (RRa) would compare to RRECG and to end-tidal carbon dioxide-based RR ([Formula: see text]) from intubated patients, the "gold standard" in predicting life-saving interventions in unstable trauma patients...
June 7, 2016: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/27167058/predicting-stroke-volume-and-arterial-pressure-fluid-responsiveness-in-liver-cirrhosis-patients-using-dynamic-preload-variables-a-prospective-study-of-diagnostic-accuracy
#16
Chun-Yu Wu, Ya-Jung Cheng, Ying-Ju Liu, Tsung-Ta Wu, Chiang-Ting Chien, Kuang-Cheng Chan
BACKGROUND: Predicting whether a fluid challenge will elicit 'fluid responsiveness' in stroke volume (SV) and arterial pressure is crucial for managing hypovolaemia and hypotension. Pulse pressure variation (PPV), SV variation (SVV) and the plethysmographic variability index (PVI) have been shown to predict SV fluid responsiveness, and the PPV/SVV ratio has been shown to predict arterial pressure fluid responsiveness under various conditions. However, these variables have not been investigated in liver cirrhosis patients...
September 2016: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/27124843/oximetry-for-preterm-infants-at-neonatal-discharge-what-is-current-practice-in-new-zealand-and-australia
#17
COMPARATIVE STUDY
Grace Wellington, Angela J Campbell, Dawn E Elder
AIM: The aim of the study was to survey level 2 and 3 neonatal units in Australasia to determine the prevalence of oximetry studies at discharge for preterm infants, how these oximetry studies are performed, and which measures are included in an oximetry report. METHODS: A 10-question online survey was created using Survey Monkey regarding use of predischarge oximetry and e-mailed to 46 neonatal units (all level 2 and three units in NZ and all level 3 units in Australia)...
March 2016: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/26978143/oxygen-reserve-index-a-novel-noninvasive-measure-of-oxygen-reserve-a-pilot-study
#18
Peter Szmuk, Jeffrey W Steiner, Patrick N Olomu, Roxana P Ploski, Daniel I Sessler, Tiberiu Ezri
BACKGROUND: Pulse oximetry provides no indication of downward trends in PaO2 until saturation begins to decrease. The Oxygen Reserve Index (ORI) is a novel pulse oximeter-based nondimensional index that ranges from 1 to 0 as PaO2 decreases from about 200 to 80 mmHg and is measured by optically detecting changes in SvO2 after SaO2 saturates to the maximum. The authors tested the hypothesis that the ORI provides a clinically important warning of impending desaturation in pediatric patients during induction of anesthesia...
April 2016: Anesthesiology
https://www.readbyqxmd.com/read/26951394/adaptation-to-life-in-the-high-andes-nocturnal-oxyhemoglobin-saturation-in-early-development
#19
Catherine Mary Hill, Ana Baya, Johanna Gavlak, Annette Carroll, Kate Heathcote, Dagmara Dimitriou, Veline L'Esperance, Rebecca Webster, John Holloway, Javier Virues-Ortega, Fenella Jane Kirkham, Romola Starr Bucks, Alexandra Marie Hogan
STUDY OBJECTIVES: Physiological adaptation to high altitude hypoxia may be impaired in Andeans with significant European ancestry. The respiratory 'burden' of sleep may challenge adaptation, leading to relative nocturnal hypoxia. Developmental aspects of sleep-related breathing in high-altitude native children have not previously been reported. We aimed to determine the influence of development on diurnal-nocturnal oxyhemoglobin differences in children living at high altitude. METHODS: This was a cross-sectional, observational study...
May 1, 2016: Sleep
https://www.readbyqxmd.com/read/26914626/accuracy-of-pulse-oximeters-intended-for-hypoxemic-pediatric-patients
#20
Bronwyn U Harris, Danton S Char, Jeffrey A Feinstein, Archana Verma, Stephen C Shiboski, Chandra Ramamoorthy
OBJECTIVES: Prior studies have shown inaccuracies in pulse oximetry readings at saturations less than 85%; however, no large studies have evaluated new sensors marketed for these low saturations. This study's purpose was to evaluate two sensors with claims of improved accuracy in children with saturations less than 85%. DESIGN: Prospective observational study. SETTING: Single institution; cardiac catheterization laboratory, and operating room...
April 2016: Pediatric Critical Care Medicine
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