Results 71 to 80 of about 177,672 (171)

Cerebral blood flow regulation in hypobaric hypoxia: role of haemoconcentration

The Journal of Physiology, Volume 602, Issue 21, Page 5643-5657, 1 November 2024.
Abstract figure legend We aimed to investigate whether haemoconcentration facilitates the normalization of cerebral blood flow during extended exposure to moderate altitude. A healthy, mixed‐sex cohort completed two identical 4‐day sojourns in a hypobaric chamber, one in normoxia and one in hypobaric hypoxia (equivalent to 3500 m altitude), to confirm ...
Rachel Turner, Peter Rasmussen, Hannes Gatterer, Joshua C. Tremblay, Johanna Roche, Giacomo Strapazzon, Giulia Roveri, Justin Lawley, Christoph Siebenmann   +8 more
wiley   +1 more source

Physiologic Factors Influencing the Arterial-To-End-Tidal CO2 Difference and the Alveolar Dead Space Fraction in Spontaneously Breathing Anesthetised Horses

Frontiers in Veterinary Science, 2018
The arterial to end-tidal CO2 difference (P(a-ET)CO2) and alveolar dead space fraction (VDalvfrac = P(a-ET)CO2/PaCO2), are used to estimate Enghoff’s “pulmonary dead space” (V/QEng), a factor which is also influenced by venous admixture and other ...
Martina Mosing, Stephan H. Böhm, Anthea Rasis, Giselle Hoosgood, Ulrike Auer, Gerardo Tusman, Regula Bettschart-Wolfensberger, Johannes P. Schramel   +7 more
doaj   +1 more source

Severe hypoxaemic hypercapnia compounds cerebral oxidative–nitrosative stress during extreme apnoea: Implications for cerebral bioenergetic function

The Journal of Physiology, Volume 602, Issue 21, Page 5659-5684, 1 November 2024.
Abstract figure legend We determined how physiological extremes of O2 and CO2 impact redox regulation of cerebral bioenergetic function. World‐class breath‐hold divers performed two maximal apnoeas resulting in hypoxaemic hypercapnia (prior normoxic normoventilation) and hyperoxaemic hypercapnia (prior hyperoxic hyperventilation).
Damian M. Bailey, Anthony R. Bain, Ryan L. Hoiland, Otto F. Barak, Ivan Drvis, Benjamin S. Stacey, Angelo Iannetelli, Gareth W. Davison, Rasmus H. Dahl, Ronan M. G. Berg, David B. MacLeod, Zeljko Dujic, Philip N. Ainslie   +12 more
wiley   +1 more source

Progressive changes in pulmonary gas exchange during invasive respiratory support for COVID‐19 associated acute respiratory failure: A retrospective study of the association with 90‐day mortality

Acta Anaesthesiologica Scandinavica, Volume 68, Issue 6, Page 803-811, July 2024.
Abstract Background Ratio of arterial pressure of oxygen and fraction of inspired oxygen (P/F ratio) together with the fractional dead space (Vd/Vt) provides a global assessment of pulmonary gas exchange. The aim of this study was to assess the potential value of these variables to prognosticate 90‐day survival in patients with COVID‐19 associated ARDS
Ylva Konsberg, Anders Åneman, Fredrik Olsen, Fredrik Hessulf, Bengt Nellgård, Mathias Hård af Segerstad, Keti Dalla   +6 more
wiley   +1 more source

The effects of cardiac output and pulmonary arterial hypertension on volumetric capnography derived-variables during normoxia and hypoxia [PDF]

, 2015
The aim of this study was to test the effect of cardiac output (CO) and pulmonary artery hypertension (PHT) on volumetric capnography (VCap) derived-variables. Nine pigs were mechanically ventilated using fixed ventilatory settings. Two steps of PHT were
Bohm, Stephan H, Martina Mosing, Mauch, Jacqueline, Raszplewicz, Joanna, Kutter, Annette P N, Stephan H. Bohm, Jacqueline Mauch, Joanna Raszplewicz, Tusman, Gerardo, Samuel Iff, Gerardo Tusman, Mosing, Martina, Iff, Samuel, Annette P. N. Kutter, Kutter AP, Iff S, Raszplewicz J, Tusman G, Kutter, Annette P N; https://orcid.org/, Bohm SH, Mosing, Martina; https://orcid.org/, Mauch J, Mosing M   +22 more
core   +2 more sources

Effect of meloxicam or robenacoxib administration timing on renal function and postoperative analgesia in cats undergoing ovariohysterectomy: A randomized, blinded, controlled clinical trial

Journal of Veterinary Pharmacology and Therapeutics, Volume 47, Issue 3, Page 175-186, May 2024.
Abstract We evaluated the effect of administration timing of meloxicam and robenacoxib on renal function, platelet cyclo‐oxygenase and perioperative analgesia in 60 cats undergoing ovariohysterectomy, in a prospective randomized blinded controlled study.
Alex Krekis, Jonathan N. King, Duncan D'Arcy‐Howard, Nadene Stapleton, Jonathan Elliott, Ludovic Pelligand   +5 more
wiley   +1 more source

Capnodynamic end‐expiratory lung volume assessment in anesthetized healthy children

Pediatric Anesthesia, Volume 34, Issue 3, Page 251-258, March 2024.
Abstract Background Capnodynamic lung function monitoring generates variables that may be useful for pediatric perioperative ventilation. Aims Establish normal values for end‐expiratory lung volume CO2 in healthy children undergoing anesthesia and to compare these values to previously published values obtained with alternative end‐expiratory lung ...
Johanna Lundquist, Niki Shams, Mats Wallin, Magnus Hallbäck, Per‐Arne Lönnqvist, Jacob Karlsson   +5 more
wiley   +1 more source

Methacholine-Induced Variations in Airway Volume and the Slope of the Alveolar Capnogram Are Distinctly Associated with Airflow Limitation and Airway Closure. [PDF]

PLoS ONE, 2015
Mechanisms driving alteration of lung function in response to inhalation of a methacholine aerosol are incompletely understood. To explore to what extent large and small airways contribute to airflow limitation and airway closure in this context ...
Laurent Plantier, Sylvain Marchand-Adam, Laurent Boyer, Camille Taillé, Christophe Delclaux   +4 more
doaj   +1 more source

Recent Advances in Pediatric Ventilatory Assistance [version 1; referees: 2 approved]

F1000Research, 2017
In this review on respiratory assistance, we aim to discuss the following recent advances: the optimization and customization of mechanical ventilation, the use of high-frequency oscillatory ventilation, and the role of noninvasive ventilation.
Nicolas Nardi, Guillaume Mortamet, Laurence Ducharme-Crevier, Guillaume Emeriaud, Philippe Jouvet   +4 more
doaj   +1 more source

Volumetric Сapnography As a Tool for Evaluation of Alveolar Ventilation Effectiveness in Clinical Practice

Общая реаниматология, 2018
The purpose of the study was to compare the relationship between the dead space volume and tidal volume (VD/VT) using volumetric capnography (VCap) during pressure controlled (PCV) and pressure supported (PSV) ventilation mode in the postoperative period.
P. Török, F. Depta, V. Donic, M. Nosál’, S. Imrecze, J. Benová, K. Galková, M. Paulíková, M. Berešík, M. Jankajová, M. Paulíny   +10 more
doaj   +1 more source