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End-tidal carbon dioxide

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https://www.readbyqxmd.com/read/28522756/influence-of-sex-menstrual-cycle-and-oral-contraceptives-on-cerebrovascular-resistance-and-cardiorespiratory-function-during-valsalva-or-standing
#1
Syed Abidi, Misha Nili, Stephania Serna, Simon Kim, Christopher Hazlett, Heather Edgell
Women experience orthostatic intolerance more than men, and experience faintness more in the early follicular (i.e. low hormone (LH)) compared to the luteal (i.e. high hormone (HH)) phase of the menstrual cycle. Men (n=13, age: 25.8±1.8) and women in the LH (day 2-5; placebo) and HH) (day 18-24; high dose) phases of the menstrual cycle with (OC; n=14, age: 22.0±0.8) or without oral contraceptives (NOC; n=12, age: 21.8±0.5) underwent the Valsalva maneuver and a supine-sit-stand protocol. Blood pressure, normalized stroke volume (SVi), cardiac output index (Qi), heart rate (HR), end-tidal carbon dioxide (ET-CO2), and middle cerebral artery blood velocity (MCA) were measured...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28516756/carbon-dioxide-versus-air-insufflation-in-gastric-endoscopic-submucosal-dissection-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#2
Ramkaji Baniya, Sunil Upadhaya, Jahangir Khan, Suresh K Subedi, Tabrez S Mohammed, Balvant K Ganatra, Ghassan Bachuwa
Background/Aims: Endoscopic submucosal dissection (ESD) with air insufflation is commonly used for the staging and treatment of early gastric carcinoma. However, carbon dioxide (CO2) use has been shown to cause less post-procedural pain and fewer adverse events. The objective of this study was to compare the post-procedural pain and adverse events associated with CO2 and air insufflation in ESD. Methods: A systematic search was conducted for randomized control trials (RCTs) comparing the two approaches in ESD...
May 18, 2017: Clinical Endoscopy
https://www.readbyqxmd.com/read/28511794/application-of-end-tidal-carbon-dioxide-monitoring-via-distal-gas-samples-in-ventilated-neonates
#3
Ziying Jin, Maoying Yang, Ru Lin, Wenfang Huang, Jiangmei Wang, Zhiyong Hu, Qiang Shu
BACKGROUND: Previous research has suggested correlations between the end-tidal partial pressure of carbon dioxide (PETCO2) and the partial pressure of arterial carbon dioxide (PaCO2) in mechanically ventilated patients, but both the relationship between PETCO2 and PaCO2 and whether PETCO2 accurately reflects PaCO2 in neonates and infants are still controversial. This study evaluated remote sampling of PETCO2 via an epidural catheter within an endotracheal tube to determine the procedure's clinical safety and efficacy in the perioperative management of neonates...
April 12, 2017: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/28510504/cardiopulmonary-exercise-testing-basics-of-methodology-and-measurements
#4
Alessandro Mezzani
Cardiopulmonary exercise testing adds measurement of ventilation and volume of oxygen uptake and exhaled carbon dioxide to routine physiological and performance parameters obtainable from conventional exercise testing, furnishing an all-round vision of the systems involved in both oxygen transport from air to mitochondria and its utilization during exercise. Peculiarities of cardiopulmonary exercise testing methodology are the use of ramp protocols and calibration procedures for flow meters and gas analyzers...
May 16, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28509779/gas-embolism-during-hysteroscopic-surgery-three-cases-and-a-literature-review
#5
Benjamin S Storm, Stine Andreasen, Anders Hovland, Erik W Nielsen
During a period of 1 month, 3 episodes of probable or actual venous air embolism occurred during hysteroscopic surgery. All patients developed the same symptoms of ventilatory and hemodynamic decompensation, beginning with a reduction in end-tidal carbon dioxide, arterial desaturation, and cyanosis on the upper trunk, and rapidly progressed to hypotension and 2 cardiac arrests. While entrainment of some air is common during hysteroscopy, life-threatening embolism is a rare but serious complication for which an anesthetist needs to be vigilant and prepared...
May 12, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/28503749/a-prospective-evaluation-of-transverse-tracheal-sonography-during-emergent-intubation-by-emergency-medicine-resident-physicians
#6
Shadi Lahham, Jamie Baydoun, James Bailey, Sandra Sandoval, Sean P Wilson, John C Fox, David E Slattery
OBJECTIVES: Establishing a definitive airway is often the first step in emergency department treatment of critically ill patients. Currently, there is no agreed upon consensus as to the most efficacious method of airway confirmation. Our objective was to determine the diagnostic accuracy of real-time sonography performed by resident physicians to confirm placement of the endotracheal tube during emergent intubation. METHODS: We performed a prospective cohort study of adult patients in the emergency department undergoing emergent endotracheal intubation...
May 15, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28495814/automated-control-of-mechanical-ventilation-during-general-anaesthesia-study-protocol-of-a-bicentric-observational-study-avas
#7
Dirk Schädler, Georg Miestinger, Tobias Becher, Inéz Frerichs, Norbert Weiler, Christoph Hörmann
INTRODUCTION: Automated control of mechanical ventilation during general anaesthesia is not common. A novel system for automated control of most of the ventilator settings was designed and is available on an anaesthesia machine. METHODS AND ANALYSIS: The 'Automated control of mechanical ventilation during general anesthesia study' (AVAS) is an international investigator-initiated bicentric observational study designed to examine safety and efficacy of the system during general anaesthesia...
May 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/28460704/continuous-capnography-in-pediatric-intensive-care
#8
REVIEW
Christine M Riley
Capnography or end-tidal carbon dioxide (Etco2) monitoring has a variety of uses in the pediatric intensive care setting. The ability to continuously measure exhaled carbon dioxide can provide vital information about airway, breathing, and circulation in critically ill pediatric patients. Capnography has diagnosis-specific applications for pediatric patients with congenital heart disease, reactive airway disease, neurologic emergencies, and metabolic derangement. This modality allows for noninvasive monitoring and has become the standard of care...
June 2017: Critical Care Nursing Clinics of North America
https://www.readbyqxmd.com/read/28456564/respiratory-and-hemodynamic-contributions-to-emotion-related-pre-syncopal-vasovagal-symptoms
#9
Johanna M Harrison, Philippe T Gilchrist, Tiana S Corovic, Curtis Bogetti, Yuqing Song, Simon L Bacon, Blaine Ditto
Vasovagal reactions are conventionally understood as resulting from systemic changes in cardiovascular activity; however, there exists a complementary perspective focused on specific changes in cerebral vasoconstriction associated with hyperventilation-induced hypocapnia. The present study investigated the role cardiovascular and respiratory activity in self-reported pre-syncopal vasovagal reactions to a surgery video in a sample a 49 healthy women. Participants who indicated more previous real-life episodes of dizziness reported experiencing significantly more symptoms in the laboratory consistent with a vasovagal response...
April 26, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28452822/a-prospective-randomized-clinical-trial-on-the-effects-of-a-valveless-trocar-on-respiratory-mechanics-during-robotic-radical-cystectomy-a-pilot-study
#10
Marco Covotta, Claudia Claroni, Giulia Torregiani, Alessia Naccarato, Susanna Tribuzi, Antonio Zinilli, Ester Forastiere
BACKGROUND: Prolonged pneumoperitoneum and Trendelenburg positioning for robot-assisted radical cystectomy (RARC) are essential for optimizing visualization of the operative field, although they worsen hemodynamic and respiratory function. Our hypothesis is that the use of a valveless trocar (VT) may improve respiratory mechanics. METHODS: In this prospective, 2-arm parallel trial, patients ASA II to III undergoing RARC were randomly assigned into 2 groups: in the VT group, the capnoperitoneum was maintained with a VT; in the control group, the capnoperitoneum was maintained with a standard trocar (ST group)...
June 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28443736/brain-resting-state-functional-connectivity-is-preserved-under-sevoflurane-anesthesia-in-patients-with-pervasive-developmental-disorders-a-pilot-study
#11
Lakshmikumar Venkatraghavan, Suparna Bharadwaj, Vincent Wourms, Audrey Tan, Michael T Jurkiewicz, David J Mikulis, Adrian P Crawley
Functional connectivity studies play a huge role in understanding the relationship between the network connections and the behavioral phenotype of patients with pervasive developmental disorders (PDD). Some patients with PDD may not be able to tolerate the imaging procedure while they are awake, and, hence, they often need general anesthesia. General anesthesia is a confounding factor in functional imaging studies due to its effect on the functional connectivity. The objective of this study is to look at the resting-state functional connectivity (RS-FC) under sevoflurane anesthesia in patients with PDDs...
May 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28409398/middle-cerebral-artery-blood-flow-velocity-during-a-4%C3%A2-km-cycling-time-trial
#12
Ben Rattray, Brittany A Smale, Joseph M Northey, Disa J Smee, Nathan G Versey
PURPOSE: This study sought to describe middle cerebral artery blood flow velocity (MCAv) during a 4 km cycling time trial, and relate it to different pacing strategies adopted by participants. METHODS: After familiarisation and a standardised exercise protocol, 15 male trained cyclists rode a 4 km time trial on a cycling ergometer. MCAv was assessed via transcranial Doppler ultrasound in the right hemisphere at resting baseline, and throughout the time trial. Mean arterial pressure, end-tidal partial pressure of carbon dioxide (PetCO2) and heart rate were assessed alongside MCAv...
April 13, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28407251/investigating-hyperventilation-syndrome-in-patients-suffering-from-empty-nose-syndrome
#13
David Mangin, Emilie Bequignon, Francoise Zerah-Lancner, Daniel Isabey, Bruno Louis, Serge Adnot, Jean-François Papon, André Coste, Laurent Boyer, Marie Devars du Mayne
OBJECTIVES/HYPOTHESIS: Patients with empty nose syndrome (ENS) following turbinate surgery often complain about breathing difficulties. We set out to determine if dyspnea in patients with ENS was associated with hyperventilation syndrome (HVS). We hypothesized that lower airway symptoms in ENS could be explained by HVS. STUDY DESIGN: Observational prospective study. METHODS: All consecutive patients referred to our center for ENS over 1 year were invited to participate...
April 13, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28405036/rapidity-and-efficacy-of-ultrasonographic-sliding-lung-sign-and-auscultation-in-confirming-endotracheal-intubation-in-overweight-and-obese-patients
#14
Sunil Rajan, Jayasankar Surendran, Jerry Paul, Lakshmi Kumar
BACKGROUND AND AIMS: Obese individuals are predisposed to difficult airway and intubation. They usually yield confusing or misleading auscultatory findings. We aimed to assess the rapidity and efficacy of ultrasonographic (USG) sliding lung sign for confirming endotracheal intubation in normal as well as overweight and obese surgical patients. METHODS: This prospective, observational study was performed in forty surgical patients. Twenty patients with body mass index (BMI) <25 were recruited to Group A, whereas twenty patients with BMI ≥25 constituted Group B...
March 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28403594/the-effect-of-surgical-technique-on-hemodynamics-arterial-oxygenation-and-pulmonary-mechanics-in-radical-prostatectomy-operations
#15
Yucel Yuce, Kutlu Hakan Erkal, Cemal Goktas, Bilal Eryildirim, Kemal Sarica
OBJECTIVE: The effects of surgical technique on respiratory mechanics, arterial oxygenation and hemodynamics in radical prostatectomy operation were investigated. METHODS: The study was planned on ASA II-III, 40-65 years old, fourty patients scheduled for radical prostatectomy under general anesthesia. They were divided into two groups: perineal and suprapubic (Group P, n = 20; Group S, n = 20). Heart rate, mean arterial blood pressure, arterial oxygen saturation (SpO2), partial pressure of end-tidal carbon dioxide (PEtCO2), Peak inspiratory pressure (PIP), plato pressure (Pplato), partial pressure of oxygen in arterial blood (PaO2), partial pressure of carbon dioxide in arterial blood (PaCO2) values were evaluated at 10 minutes after induction...
March 31, 2017: Archivio Italiano di Urologia, Andrologia
https://www.readbyqxmd.com/read/28403407/apnoeic-oxygenation-in-adults-under-general-anaesthesia-using-transnasal-humidified-rapid-insufflation-ventilatory-exchange-thrive-a-physiological-study
#16
I-M Gustafsson, Å Lodenius, J Tunelli, J Ullman, M Jonsson Fagerlund
Background.: Apnoeic oxygenation during anaesthesia has traditionally been limited by the rapid increase in carbon dioxide and subsequent decrease in pH. Using a Transnasal Humidified Rapid-Insufflation Ventilatory Exchange (THRIVE) technique a slower increase in carbon dioxide than earlier studies was seen. Notably, apnoeic oxygenation using THRIVE has not been systematically evaluated with arterial blood gases or in patients undergoing laryngeal surgery. The primary aim of this study was to characterize changes in arterial P O 2 , P CO 2 and pH during apnoeic oxygenation using THRIVE under general anaesthesia...
April 1, 2017: British Journal of Anaesthesia
https://www.readbyqxmd.com/read/28394460/suspected-air-embolism-through-the-thoracic-ventral-internal-vertebral-venous-plexus-during-hemilaminectomy-in-dogs
#17
V Mortera-Balsa, H van Oostrom, C Yeamans, R Gutierrez-Quintana, J Penderis, N Granger
Venous air embolism entering via the ventral internal vertebral venous plexus was suspected during thoracic spinal surgery in two dogs. In both cases, air was seen bubbling from a pool of blood on the floor of the vertebral canal accompanied by sudden cardiopulmonary disturbances: low end-tidal carbon dioxide pressure, tachycardia and reduction in oxygen in the blood. One dog became dyspnoeic and one died.
April 10, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/28389602/shear-mediated-dilation-of-the-internal-carotid-artery-occurs-independent-of-hypercapnia
#18
Ryan L Hoiland, Kurt Jason Smith, Howard H Carter, Nia C S Lewis, Michael M Tymko, Kevin W Wildfong, Anthony R Bain, Daniel J Green, Philip N Ainslie
Evidence for shear stress as a regulator of carotid artery dilation in response to increased arterial carbon dioxide was recently demonstrated in humans during sustained elevations in CO2 (hypercapnia); however, the relative contributions of CO2 and shear stress to this response remains unclear. We examined the hypothesis that, following a 30-second transient increase in arterial CO2 tension and consequent increase in internal carotid artery shear stress, internal carotid artery diameter would increase, indicating shear-mediated dilation, in the absence of concurrent hypercapnia...
April 7, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28389601/anterior-cerebral-blood-velocity-and-end-tidal-co2-responses-to-exercise-differ-in-children-and-adults
#19
Lindsay A Ellis, Philip N Ainslie, Victoria A Armstrong, Laura Emily Morris, Ryan Gerard Simair, Nathan R Sletten, Christine M Tallon, Ali Mary McManus
Little is known about the response of the cerebrovasculature to acute exercise in children and how these responses might differ with adults. Therefore, we compared changes in middle cerebral artery blood velocity (MCAVmean), partial pressure of end-tidal carbon dioxide (PETCO2), blood pressure and ventilation (VE) in response to incremental exercise between children and adults. Thirteen children [aged 9±1 (SD) y] and 13 sex-matched adults [aged 25±4 y] completed a maximal exercise test during which MCAVmean, PETCO2 and VE were measured continuously...
April 7, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28384963/effect-of-pneumoperitoneum-and-lateral-position-on-oropharyngeal-seal-pressures-of-proseal-lma-in-laparoscopic-urological-procedures
#20
Preeti Rustagi, Geeta A Patkar, Anil Kumar Ourasang, Bharati A Tendolkar
INTRODUCTION: A sustained and effective oropharyngeal sealing with supraglottic airway is required to maintain the ventilation during laparoscopic surgery. Previous studies have observed the Oropharyngeal Seal Pressure (OSP) for Proseal Laryngeal Mask Airway (PLMA) after pneumoperitoneum in supine and trendelenburg position, where PLMA was found to be an effective airway device. This study was conducted with ProSeal LMA, for laparoscopic Urologic procedures done in lateral position. AIM: To measure OSP in supine and lateral position and to observe the effect of pneumoperitoneum in lateral position on OSP...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
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