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End-tidal carbon dioxide

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https://www.readbyqxmd.com/read/27899530/deep-breathing-improves-end-tidal-carbon-dioxide-monitoring-of-an-oxygen-nasal-cannula-based-capnometry-device-in-subjects-extubated-after-abdominal-surgery
#1
Shunsuke Takaki, Kenji Mizutani, Moeka Fukuchi, Tasuku Yoshida, Masahumi Idei, Yuko Matsuda, Yoshikazu Yamaguchi, Tetsuya Miyashita, Takeshi Nomura, Osamu Yamaguchi, Takahisa Goto
BACKGROUND: Capnometry detects hypoventilation earlier than pulse oximetry while supplemental oxygen is being administered. We compared the end-tidal CO2 (PETCO2 ) measured using a newly developed oxygen nasal cannula with a CO2-sampling port and the PaCO2 in extubated subjects after abdominal surgery. We also investigated whether the difference between PaCO2 and PETCO2 is affected by resting, by spontaneous breathing with the mouth consciously closed, and by deep breathing with the mouth closed...
November 29, 2016: Respiratory Care
https://www.readbyqxmd.com/read/27896454/venous-air-embolism-in-the-sitting-position-in-cranial-neurosurgery-incidence-and-severity-according-to-the-used-monitoring
#2
Franziska Günther, Paul Frank, Makoto Nakamura, Elvis Josef Hermann, Thomas Palmaers
BACKGROUND: There is an ongoing debate about the sitting position (SP) in neurosurgical patients. The SP provides a number of advantages as well as severe complications such as commonly concerning venous air embolism (VAE). The best monitoring system for the detection of VAE is still controversial. METHODS: In this retrospective analysis we compared 208 patients. Transesophageal echocardiography (TEE) or transthoracic Doppler (TTD) were used as monitoring devices to detect VAE; 101 cases were monitored with TEE and 107 with TTD...
November 28, 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27871572/the-effects-of-sevoflurane-and-desflurane-on-the-hemodynamics-and-respiratory-functions-in-laparoscopic-sleeve-gastrectomy
#3
Hatice Kaya Ozdogan, Suleyman Cetinkunar, Faruk Karateke, Sibel Cetinalp, Muge Celik, Sefa Ozyazici
STUDY OBJECTIVES: Sleeve gastrectomy has been one of the most commonly performed bariatric surgery methods. The study aimed to compare the effects of 2 most commonly used inhalation anesthetics, sevoflurane and desflurane, on the peroperative hemodynamic alterations and postoperative respiratory functions in morbidly obese patients undergoing sleeve gastrectomy. DESIGN: Nonrandomized cohort. SETTINGS: Operating room, postoperative period. PATIENTS: Eighty-four morbidly obese patients with a body mass index greater than 40 kg/m(2) who had scheduled to undergo sleeve gastrectomy operation were prospectively included in the study...
December 2016: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/27850753/1116-end-tidal-carbon-dioxide-monitoring-for-tracheal-intubation-a-prospective-multicenter-study
#4
Ilana Harwayne-Gidansky, Melissa Langhan, Sholeen Nett, Beth Emerson, Matthew Pinto, Akira Nishisaki
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27817818/clinical-usefulness-of-end-tidal-co2-profiles-during-incremental-exercise-in-patients-with-chronic-thromboembolic-pulmonary-hypertension
#5
R P Ramos, E V M Ferreira, F M Valois, A Cepeda, C M S Messina, R K Oliveira, A T V Araújo, C A Teles, J A Neder, L E Nery, J S Ota-Arakaki
INTRODUCTION: Great ventilation to carbon dioxide output (ΔV˙E/ΔV˙CO2) and reduced end-tidal partial pressures for CO2 (PetCO2) during incremental exercise are hallmarks of chronic thromboembolic pulmonary hypertension (CTEPH) and idiopathic pulmonary arterial hypertension (IPAH). However, CTEPH is more likely to involve proximal arteries, which may lead to poorer right ventricle-pulmonary vascular coupling and worse gas exchange abnormalities. Therefore, abnormal PetCO2 profiles during exercise may be more prominent in patients with CTEPH and could be helpful to indicate disease severity...
November 2016: Respiratory Medicine
https://www.readbyqxmd.com/read/27809243/a-cross-correlational-analysis-between-electroencephalographic-and-end-tidal-carbon-dioxide-signals-methodological-issues-in-the-presence-of-missing-data-and-real-data-results
#6
Maria Sole Morelli, Alberto Giannoni, Claudio Passino, Luigi Landini, Michele Emdin, Nicola Vanello
Electroencephalographic (EEG) irreducible artifacts are common and the removal of corrupted segments from the analysis may be required. The present study aims at exploring the effects of different EEG Missing Data Segment (MDS) distributions on cross-correlation analysis, involving EEG and physiological signals. The reliability of cross-correlation analysis both at single subject and at group level as a function of missing data statistics was evaluated using dedicated simulations. Moreover, a Bayesian-based approach for combining the single subject results at group level by considering each subject's reliability was introduced...
October 31, 2016: Sensors
https://www.readbyqxmd.com/read/27806982/coupling-between-arterial-and-venous-cerebral-blood-flow-during-postural-change
#7
Shigehiko Ogoh, Takuro Washio, Hiroyuki Sasaki, Lonnie Grove Petersen, Niels H Secher, Kohei Sato
In supine humans the main drainage from the brain is through the internal jugular vein (IJV) but the vertebral veins (VV) become important during orthostatic stress because the IJV is partially collapsed. To identify the effect of this shift in venous drainage from the brain on the cerebral circulation, this study addressed both arterial and venous flow responses in the "anterior" and "posterior" parts of the brain when 9 healthy subjects (5 men) were seated and flow was manipulated by hyperventilation and inhalation of 6% carbon dioxide (CO2)...
November 2, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/27779551/does-exercise-ventilatory-inefficiency-predict-poor-outcome-in-heart-failure-patients-with-copd
#8
Maria Clara Alencar, Flavio F Arbex, Aline Souza, Adriana Mazzuco, Priscila A Sperandio, Alcides Rocha, Daniel M Hirai, Frederico Mancuso, Danilo C Berton, Audrey Borghi-Silva, Dirceu Almeida, Denis E OʼDonnel, J Alberto Neder
PURPOSE: To investigate whether the opposite effects of heart failure (HF) and chronic obstructive pulmonary disease (COPD) on exercise ventilatory inefficiency (minute ventilation [(Equation is included in full-text article.)E]-carbon dioxide output [(Equation is included in full-text article.)CO2] relationship) would negatively impact its prognostic relevance. METHODS: After treatment optimization and an incremental cardiopulmonary exercise test, 30 male patients with HF-COPD (forced expiratory volume in 1 second [FEV1] = 57% ± 17% predicted, ejection fraction = 35% ± 6%) were prospectively followed up during 412 ± 261 days for major cardiac events...
November 2016: Journal of Cardiopulmonary Rehabilitation and Prevention
https://www.readbyqxmd.com/read/27777693/comparison-of-end-tidal-carbon-dioxide-and-arterial-blood-bicarbonate-levels-in-patients-with-metabolic-acidosis-referred-to-emergency-medicine
#9
Ali Taghizadieh, Mahboub Pouraghaei, Payman Moharamzadeh, Alireza Ala, Farzad Rahmani, Karim Basiri Sofiani
Introduction: The routine and gold standard method to diagnose of acid - base disturbance is arterial blood gas (ABG) sampling. Capnography could be used to measure the end-tidal carbon dioxide (ETCO2) levels and ETco2 has a close correlation with the PaCo2. The aim of this study was comparison the ETco2 and arterial blood bicarbonate levels in patients with metabolic acidosis. Methods: In a descriptive-analytical study that performed in Emergency Department of Emam Reza Medical Research and Training Hospital of Tabriz on patients with metabolic acidosis, ETco2 level and blood bicarbonate levels in 262 patients were evaluated...
2016: Journal of Cardiovascular and Thoracic Research
https://www.readbyqxmd.com/read/27742745/establishing-a-gradient-between-partial-pressure-of-arterial-carbon-dioxide-and-end-tidal-carbon-dioxide-in-patients-with-acute-respiratory-distress-syndrome
#10
Tariq Yousuf, Taylor Brinton, Ghulam Murtaza, Daniel Wozniczka, Khansa Ahmad, Joy Iskandar, Raju Mehta, Hesam Keshmiri, Tabassum Hanif
End-tidal carbon dioxide (ETCO2) monitoring is useful in many situations. However, ETCO2 monitoring is unreliable in patients with acute respiratory distress syndrome (ARDS) due to widespread lung inflammation. In our study, we attempt to establish the gradient between the arterial pressure of carbon dioxide (PaCO2) and ETCO2 in patients with ARDS, which we defined as the PaETCO2 gradient. The main objective of the study was to establish a PaETCO2 gradient in each severity of ARDS. We analyzed 35 patients with ARDS and a total of 88 arterial blood gases were included...
October 14, 2016: Journal of Investigative Medicine: the Official Publication of the American Federation for Clinical Research
https://www.readbyqxmd.com/read/27725350/cardiorespiratory-effects-of-isoflurane-in-asiatic-black-bears-ursus-thibetanus-anesthetized-with-intramuscular-medetomidine-and-zolazepam-tiletamine
#11
Dong-Hyuk Jeong, Jeong-Jin Yang, Seong-Hoon Seok, Dong-Joo Song, Seong-Chan Yeon
The objective of this study was to determine the dose-dependent effects of isoflurane on various cardiovascular parameters and the stable range of isoflurane concentrations in Asiatic black bears (Ursus thibetanus). Seven Asiatic black bears were intramuscularly injected with medetomidine, zolazepam, and tiletamine (MZT) to induce anesthesia and anesthesia was maintained by administering isoflurane in 100% oxygen (4 l/min) without mechanical ventilation. Several cardiovascular parameters were measured at five end-tidal isoflurane concentrations (0...
September 30, 2016: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/27723956/antenatal-smoking-and-substance-misuse-infant-and-newborn-response-to-hypoxia
#12
Kamal Ali, Thomas Rosser, Ravindra Bhat, Kim Wolff, Simon Hannam, Gerrard F Rafferty, Anne Greenough
OBJECTIVES: To determine at the peak age for sudden infant death syndrome (SIDS) the ventilatory response to hypoxia of infants whose mothers substance misused in pregnancy (SM infants), or smoked during pregnancy (S mothers) and controls whose mothers neither substance misused or smoked. In addition, we compared the ventilatory response to hypoxia during the neonatal period and peak age of SIDS. WORKING HYPOTHESIS: Infants of S or SM mothers compared to control infants would have a poorer ventilatory response to hypoxia at the peak age of SIDS...
October 10, 2016: Pediatric Pulmonology
https://www.readbyqxmd.com/read/27722086/mri-based-cerebrovascular-reactivity-using-transfer-function-analysis-reveals-temporal-group-differences-between-patients-with-sickle-cell-disease-and-healthy-controls
#13
Jackie Leung, James Duffin, Joseph A Fisher, Andrea Kassner
OBJECTIVES: Cerebrovascular reactivity (CVR) measures the ability of cerebral blood vessels to change their diameter and, hence, their capacity to regulate regional blood flow in the brain. High resolution quantitative maps of CVR can be produced using blood-oxygen level-dependent (BOLD) magnetic resonance imaging (MRI) in combination with a carbon dioxide stimulus, and these maps have become a useful tool in the clinical evaluation of cerebrovascular disorders. However, conventional CVR analysis does not fully characterize the BOLD response to a stimulus as certain regions of the brain are slower to react to the stimulus than others, especially in disease...
2016: NeuroImage: Clinical
https://www.readbyqxmd.com/read/27692903/intubated-versus-nonintubated-general-anesthesia-or-video-assisted-thoracoscopic-surgery-a-case-control-study
#14
Joanne F Irons, Lachlan F Miles, Kaustuv R Joshi, Andrew A Klein, Marco Scarci, Piergiorgio Solli, Guillermo Martinez
OBJECTIVE: General anesthesia with endobronchial intubation and one-lung positive-pressure ventilation always has been considered mandatory for thoracic surgery. Recently, there has been interest in nonintubated techniques for video-assisted thoracoscopic surgery (VATS) in awake and sedated patients. The authors' center developed a nonintubated technique with spontaneous ventilation with the patient under general anesthesia using a supraglottic airway device. The authors believe that this was the first study to compare a nonintubated general anesthetic technique with an intubated general anesthetic technique for VATS...
July 7, 2016: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/27691965/anesthesia-in-a-captive-juvenile-black-rhinoceros-diceros-bicornis-for-magnetic-resonance-imaging-and-computed-tomography
#15
Cameron Ratliff, Rebecca S Sayre, Mauricio Lepiz
A hand-reared, 53-kg, female, 30-day-old black rhinoceros ( Diceros bicornis ) calf presented for magnetic resonance imaging and computed tomography after demonstrating neurologic signs. The rhino was premedicated intramuscularly with butorphanol and midazolam, yielding satisfactory sedation. Induction was achieved using intravenous propofol until the trachea could be intubated. Anesthesia was maintained with sevoflurane in 100% oxygen (mean end-tidal concentration of 2 ± 0.5%). Mean values recorded during anesthesia included were heart rate, end-tidal carbon dioxide, respiratory rate, noninvasive blood pressure, and pulse oximetry...
September 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/27687558/the-prefrontal-oxygenation-and-ventilatory-responses-at-start-of-one-legged-cycling-exercise-have-relation-to-central-command
#16
Ryota Asahara, Kanji Matsukawa, Kei Ishii, Nan Liang, Kana Endo
When performing exercise arbitrarily, activation of central command should start prior to the onset of exercise, but when exercise is forced to start with cue, activation of central command should be delayed. We examined whether the in advance activation of central command influenced the ventilatory response and reflected in the prefrontal oxygenation, by comparing the responses during exercise with arbitrary and cued start. The breath-by-breath respiratory variables and the prefrontal oxygenated-hemoglobin concentration (Oxy-Hb) were measured during one-legged cycling...
September 29, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27687394/the-optimal-combination-of-mechanical-ventilator-parameters-under-general-anesthesia-in-obese-patients-undergoing-laparoscopic-surgery
#17
Pengcheng Xie, Zhanfang Li, Zhongyi Tian
OBJECTIVE: Pulmonary dysfunction after laparoscopic surgery is commonly seen in the high-risk group of obese patients. To reduce or avoid this complication caused by an improper combination of mechanical ventilation parameters, we conducted the following trial of 3 factors with 3 levels of mechanical ventilation, aimed to obtain the low airway pressure with good ventilator effects. METHODS: Patients were randomly allocated as a sample of cases according to the "30≤weight/height(2)<40" obesity index...
November 2016: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/27663507/does-end-tidal-capnography-confirm-tracheal-intubation-in-fresh-frozen-cadavers
#18
Cliff Reid, Ian Ferguson, Brian Burns, Karel Habig, Mohammed Shareef
BACKGROUND: Life-like end-tidal capnography (ETCO2) waveforms have been demonstrated in recently deceased and fresh-frozen cadavers following tracheal intubation, offering potential for high fidelity airway simulation training. As the mechanism for carbon dioxide production is not fully understood, it is possible that oesophageal intubation may also generate a capnograph. Our aim was to measure ETCO2 levels following (1) oesophageal and (2) tracheal intubation in fresh-frozen cadavers, and to observe the size, shape and duration of any capnographic waveform...
September 23, 2016: Emergency Medicine Journal: EMJ
https://www.readbyqxmd.com/read/27659819/the-relationship-between-transorbital-ultrasound-measurement-of-the-optic-nerve-sheath-diameter-onsd-and-invasively-measured-icp-in-children-part-i-repeatability-observer-variability-and-general-analysis
#19
Llewellyn C Padayachy, Vaishali Padayachy, Ushma Galal, Rebecca Gray, A Graham Fieggen
PURPOSE: The aim of this study was to investigate the relationship between optic nerve sheath diameter (ONSD) measurement and invasively measured intracranial pressure (ICP) in children. METHODS: ONSD measurement was performed prior to invasive measurement of ICP. The mean binocular ONSD measurement was compared to the ICP reading. Physiological variables including systolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), pulse rate, temperature, respiratory rate and end tidal carbon dioxide (ETCO2) level were recorded at the time of ONSD measurement...
October 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/27638460/initial-end-tidal-co2-partial-pressure-predicts-outcomes-of-in-hospital-cardiac-arrest
#20
An-Yi Wang, Chien-Hua Huang, Wei-Tien Chang, Min-Shan Tsai, Chih-Hung Wang, Wen-Jone Chen
INTRODUCTION: Monitoring the partial pressure of end-tidal carbon dioxide (PEtco2) has been advocated since 2010 as an index of resuscitation efforts. However, related research has largely focused on out-of-hospital cardiac arrest victims. In-hospital cardiac arrest (IHCA) differs in terms of etiologies and demographics, the merit of initial PEtco2 values was explored. METHODS: This was a retrospective study in a single medical center between February 2011 and August 2014...
August 27, 2016: American Journal of Emergency Medicine
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