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("End Tidal" OR "End-tidal") AND ("Carbon Dioxide" OR "CO2")

Carolyn D Davies, Patrick B McGrath, Lisa R Hale, Daniel N Weiner, David F Tolin
Capnometry guided respiratory interventions have shown promising results in the treatment of panic disorder, but mechanisms of change are not yet well-understood. The current study examined changes in end-tidal carbon dioxide (ETCO2 ), anxiety sensitivity, and perceived control as mediators of panic symptom change. Sixty-nine adults with panic disorder received 4 weeks of respiratory training, and panic symptom severity and potential mediators were assessed at Pre-treatment, Mid-treatment, Post-treatment, 2-month follow-up, and 12-month follow-up...
December 11, 2018: Applied Psychophysiology and Biofeedback
Henning A Haga, Vanessa Bettembourg, Andreas Lervik
OBJECTIVE: To determine the infusion rates that maintain the train-of-four (TOF) ratio within 20-70% in dogs and compare the infusion rates between diabetic and nondiabetic dogs. STUDY DESIGN: Prospective clinical study. ANIMALS: In total, 47 dogs scheduled for phacoemulsification were included with a median (80% central range) bodyweight of 10.6 (5.7-35.5) kg and age of 7 (1-11) years. Diabetes mellitus was previously diagnosed in nine dogs...
September 19, 2018: Veterinary Anaesthesia and Analgesia
Man Y Lam, Victoria J Haunton, Thompson G Robinson, Ronney B Panerai
The ideal technique for dynamic cerebral autoregulation (dCA) assessment in critically ill patients should provide considerable variability in blood pressure (BP), but without the need for patient co-operation. We propose using rapid head positioning (RHP) over spontaneous BP fluctuations for dCA assessment in acute ischemic stroke (AIS) patients. Cerebral blood velocity (Transcranial Doppler), beat-to-beat BP (Finometer), and end-tidal carbon dioxide (ETCO2 , capnography) were recorded during 5-min baseline and RHP in 16 controls (8 female, mean age 57 ± 16 years) and 15 AIS (7 female, mean age 69 ± 8 years) at two (12 ± 8 days) and 3 visits (13...
December 7, 2018: American Journal of Physiology. Heart and Circulatory Physiology
Min Hyung Lee, Geuk Young Jang, Young Eun Kim, Pil Joong Yoo, Hun Wi, Tong In Oh, Eung Je Woo
Quantitative ventilation monitoring and respiratory event detection are needed for the diagnosis of sleep apnea and hypoventilation. We report the development of a portable device with a chest belt, nasal cannula and finger sensor to continuously acquire multi-channel signals including tidal volume, nasal pressure, respiratory effort, body position, snoring sound, ECG and SpO2. The unique feature of the device is the continuous tidal volume signal obtained from real-time lung ventilation images produced by the electrical impedance tomography (EIT) technique...
November 20, 2018: Physiological Measurement
C R Harnsberger, K Alavi, J S Davids, P R Sturrock, M Zayaruzny, J A Maykel
BACKGROUND: Carbon dioxide (CO2 ) embolism is a rare but potentially devastating complication of minimally invasive abdominal and retroperitoneal surgery. Characterized by a decrease in end-tidal CO2 (ETCO2 ) and oxygen saturation (SpO2 ), CO2 emboli can cause rapid intraoperative hypotension and cardiovascular collapse. Transanal total mesorectal excision (taTME) is a novel surgical approach for rectal resection, which requires high flow CO2 insufflation in a low volume operative field...
December 6, 2018: Techniques in Coloproctology
John J Gallagher
Procedural sedation is used to alleviate pain and anxiety associated with diagnostic procedures in the acute care setting. Although commonly used, procedural sedation is not without risk. Key to reducing this risk is early identification of risk factors through presedation screening and monitoring during the procedure. Electrocardiogram, respiratory rate, blood pressure, and pulse oximetry commonly are monitored. These parameters do not reliably identify airway and ventilation compromise. Capnography measures exhaled carbon dioxide and provides early identification of airway obstruction and hypoventilation...
2018: AACN Advanced Critical Care
Raul Caso, Colleen Hamm Kelly, M Blair Marshall
INTRODUCTION: Double lumen tube (DLT) intubation is used for lung isolation but is not without disadvantages including increased intubation time, anesthesia expertise, risk of airway trauma, and costs over single lumen tube (SLT) intubation. SLT intubation with CO2 insufflation can be used as an alternative for lung isolation. We reviewed our experience with this technique during thoracoscopic surgery. METHODS: We performed a retrospective review of a prospectively maintained IRB-approved database from 2009 to 2018...
December 3, 2018: Surgical Endoscopy
(no author information available yet)
No abstract text is available yet for this article.
December 2018: Pediatric Emergency Care
Samuel T Selby, Thomas Abramo, Nicholas Hobart-Porter
End-tidal CO2 (ETCO2) monitoring is not a new modality in the pediatric emergency department (PED) and emergency department. It is the standard of care during certain procedures such as intubations and sedations and can be used in variety of clinical situations. However, ETCO2 may be underused in the PED setting. The implementation of ETCO2 monitoring may be accomplished many ways, but a foundation of capnography principles specifically in ventilation, cardiac output, and current literature regarding its application is essential to successful implementation...
December 2018: Pediatric Emergency Care
Valter Perilli, Paola Aceto, Giovanni Punzo, Celestino Pio Lombardi, Rocco Bellantone, Liliana Sollazzi
Synchronous posterior retroperitoneoscopic bilateral adrenalectomy (PR-BilA) is a novel technique proposed for the definitive cure of hypercortisolism when a surgical approach is indicated. The aim of the present prospective cohort study was to compare the carbon dioxide (CO2 ) absorption in patients undergoing PR-BilA with those undergoing single posterior retroperitoneoscopic adrenalectomy (PRA). Twenty-nine patients undergoing PR-BilA or PRA were consecutively enrolled. Anaesthesia was standardised. In both groups, CO2 elimination (VCO2 ), CO2 dissolved in arterial blood (PaCO2 ), end-tidal CO2 (EtCO2 ), and volume per minute (VM) were measured at the following time points: after anaesthesia induction and before CO2 insufflation (T1), 5 min after CO2 insufflation (T2), at the time of maximum VCO2 (T3), and at desufflation (T4)...
December 1, 2018: Updates in Surgery
Zhifeng Liu, Qingyu Liu, Gongfa Wu, Haigang Li, Yue Wang, Rui Chen, Cai Wen, Qin Ling, Zhengfei Yang, Wanchun Tang
Background: Utilize quantitative computed tomography (QCT) to detect and evaluate the severity of lung injury after successful cardiopulmonary resuscitation (CPR) in a porcine cardiac arrest (CA) model with different downtimes. Methods: Twenty-one male domestic pigs weighing 38±3 kg were randomized into 3 groups: the sham group (n=5), the ventricular fibrillation (VF) 5 min (VF5) group (n=8), and the VF 10 min (VF10) group (n=8). VF was induced and untreated for 5 (VF5 group) or 10 (VF10 group) min before the commencement of manual CPR...
October 2018: Quantitative Imaging in Medicine and Surgery
Christoph Siebenmann, Camilla K Ryrsø, Laura Oberholzer, James P Fisher, Linda M Hilsted, Peter Rasmussen, Niels H Secher, Carsten Lundby
Hypoxia increases heart rate (HR) in humans by sympathetic activation and vagal withdrawal. However, in anaesthetized dogs hypoxia increases vagal activity and reduces HR if pulmonary ventilation does not increase and we evaluated whether that observation applies to awake humans. Ten healthy males were exposed to 15 min of normoxia and hypoxia (10.5 % O2 ), while respiratory rate and tidal volume were volitionally controlled at values identified during spontaneous breathing in hypoxia. End-tidal CO2 tension was clamped at 40 mmHg by CO2 supplementation...
November 29, 2018: Journal of Applied Physiology
Serena Mennitto, Johanna Harrison, Thomas Ritz, Pierre Robillard, Christopher R France, Blaine Ditto
BACKGROUND: Whether produced by breathing too fast or too deeply, hyperventilation is common in stressful situations and may contribute to blood donation-related vasovagal symptoms. The effects of some previously tested interventions for vasovagal symptoms, for example, applied tension (AT), may be related to reduction of hyperventilation. More targeted breathing techniques might be useful. STUDY DESIGN AND METHODS: This was a randomized controlled trial comparing the effects of AT, a slow, shallow "anti-hyperventilation" breathing technique previously tested in phobic individuals (respiration control [RESP]), the combination of AT and RESP, and no intervention on blood donors participating in university clinics...
November 29, 2018: Transfusion
Se-Hyeok Park, Yong Deok Lim, Yong Hun Jung, Kyung Woon Jeung
Ischemia-induced left ventricular (LV) wall thickening compromises the hemodynamic effectiveness of cardiopulmonary resuscitation (CPR). However, accurate assessment of the severity of ischemia-induced LV wall thickening during CPR is challenging. We investigated, in a swine model, whether hemodynamic parameters, including end-tidal carbon dioxide (ETCO2) level, are linearly associated with the severity of ischemia-induced LV wall thickening during CPR of consistent quality. We retrospectively analyzed 96 datasets for ETCO2 level, arterial pressure, LV wall thickness, and the percent of measured end-diastolic volume (%EDV) relative to EDV at the onset of ventricular fibrillation from eight pigs...
2018: PloS One
Jean-Luc Baudel, Vincent Dubee, Pierre-Yves Boelle, Simon Bourcier, Guillaume Leblanc, Jeremie Joffre, Naike Bigé, Gabriel Preda, Guillaume Dumas, Bertrand Guidet, Eric Maury, Hafid Ait-Oufella
BACKGROUND: We aimed to evaluate the predictive value of the end-tidal CO2 (EtCO2) alone or combined with ventilation related parameters on spontaneous breathing trial (SBT) outcome on mechanically ventilated patients. METHODS: Prospective observational study in a medical ICU. Mechanically ventilated adult patients who met predefined criteria for weaning were included. Patients underwent a T-piece SBT for 30 minutes and the usual hemodynamic and respiratory clinical parameters including EtCO2 were recorded every 5 minutes...
November 22, 2018: Minerva Anestesiologica
Koji Sakata, Kazuhiro Kito, Naokazu Fukuoka, Kiyoshi Nagase, Kumiko Tanabe, Hiroki Iida
Background: Hypercapnia dilates cerebral vessels and increases cerebral blood flow, resulting in increases in intracranial pressure. Sevoflurane is reported to preserve cerebrovascular carbon dioxide reactivity. However, the contribution of inhaled anesthetics to vasodilatory responses to hypercapnia have not been clarified. Moreover, the cerebrovascular response to desflurane under hypercapnia has not been reported. We examined the effects of sevoflurane and desflurane on vasodilatory responses to hypercapnia in rats...
November 27, 2018: Korean Journal of Anesthesiology
Lucy C Beishon, Ronney B Panerai, Thompson G Robinson, Hari Subramaniam, Victoria J Haunton
Background: The incidence of dementia is predicted to rise rapidly, but sensitive diagnostic tests remain elusive. Changes in cerebral blood flow velocity (CBFv) can occur at an early stage of cognitive decline, and can be measured by transcranial Doppler ultrasonography (TCD). Objective: The aim of this study was to characterize the CBFv changes that occur in healthy older adults (HC), mild cognitive impairment (MCI), and Alzheimer's disease (AD), in response to a language task from the Addenbrooke's cognitive examination (ACE-III)...
September 28, 2018: JAD Reports
J C de Schoutheete, I Fourneau, F Waroquier, L De Cupere, M O'Connor, K Van Cleynenbreugel, J C Ceccaldi, S Nijs
Background: The present paper describes three cases where ER-REBOA® was used with partial aorta occlusion (AO), by performing a partial resuscitative endovascular balloon occlusion of the aorta or pREBOA, in an austere pre-hospital military environment.In addition, because no specific REBOA algorithm for pre-hospital environment exists yet, this paper seeks to fill this gap, proposing a new pragmatic REBOA algorithm. Methods: Belgian Special Operations Surgical Team applied REBOA in three patients according to a decisional algorithm, based on the MIST acronym used for trauma patients...
2018: World Journal of Emergency Surgery: WJES
Fan Xiaojun, Weiwei Liu, Pawel Wargocki
Thermal comfort, self-reported acute health symptoms, cognitive performance, and physiological reactions were examined at four temperatures (26, 30, 33 and 37°C) at a relative humidity of 70%. Thirty-two sub-tropically acclimatized subjects experienced each condition for 175 min., in balanced order, in a climatic chamber. The perception of heat gradually increased with increasing temperature, but the subjects felt hot only at 37°C. The temperature of 33°C was on average rated as acceptable and only just uncomfortable...
November 25, 2018: Indoor Air
Vasileios Stavrou, Fotini Bardaka, Eleni Karetsi, Giorgos Seitanidis, Zoe Daniil, Konstantinos I Gourgoulianis
AIM: The purpose of this study was to investigate the cardiopulmonary exercise testing (CPET) in breeders patients with obstructive sleep apnea syndrome (OSAS). METHOD: Thirty-two male participants (Age: 42.2 ± 7.3yrs, BMI: 29.5 ± 2.2 kg/m2 ) underwent full overnight polysomnography (PSG) and were divided into two groups (OSAS group: n = 20 vs. Control group: n = 12). 72-hours after the PSG study, they were subjected to CPET. The Independent t-test was used to measure the differences between the groups...
November 22, 2018: Respiratory Physiology & Neurobiology
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