Results 111 to 120 of about 3,345,378 (306)

Pulmonary perfusion without ventilation .

, 1983
An 88-yr-old man, with prior left upper lobectomy and phrenic nerve injury, had a ventilation/perfusion lung image. Both wash-in and equilibrium ventilation images showed no radioactive gas in the left lung. Nevertheless, the left lung was perfused.
Spencer, R P, Sziklas, J J, Chapman, Christopher N, MD, Rosenberg, R J   +3 more
core   +1 more source

Capnography reflects ventilation/perfusion distribution in a model of acute lung injury

, 2011
Background Changes in the shape of the capnogram may reflect changes in lung physiology. We studied the effect of different ventilation/perfusion ratios (V/Q) induced by positive end-expiratory pressures (PEEP) and lung recruitment on phase III slope (S ...
BORGES, J. B., HEDENSTIERNA, G., BOHM, S. H., SUAREZ-SIPMANN, F., TUSMAN, G., G. TUSMAN, S. H. BOHM, Suarez-Sipmann, F.,, Borges, J. B.,, J. B. BORGES, F. SUAREZ-SIPMANN, Hedenstierna, Göran,, G. HEDENSTIERNA   +12 more
core   +1 more source

Monitoring and assessment for obstructive sleep apnea

FlexMat, EarlyView.
This review systematically classifies Obstructive Sleep Apnea (OSA) monitoring indicators into three categories: physical, biochemical, and electrophysiological indicators, and lists several methods for each category. Abstract Obstructive sleep apnea (OSA) is a common chronic sleep‐disordered breathing disease characterized by recurrent upper airway ...
Yaowen Xu, Feifei Lin, Shujiao Chen, Zhen You, Shujing Zhu, Weiwei Zhao, Qiang Zhao   +6 more
wiley   +1 more source

A novel alveolar Krebs cycle-triggered CO2 sensing mechanism regulates regional pulmonary ventilation. [PDF]

, 2011
Pulmonary perfusion disorders provoke atelectasis in order to minimize ventilation/perfusion mismatch. However, the underlying mechanisms remain unknown.
Rainer Kiefmann, Martina Kiefmann, Leoni Schulte-Uentrop, Kai Heckel, Oliver Tritt, Sascha Tank, Alwin Goetz, Paula Keller   +7 more
core  

Engineering an artificial trachea: Quantitative benchmarks and modular strategies for mechanics, epithelialization, and vascular integration

FlexMat, EarlyView.
In this work, we first examine the limitations of surgical repair and stenting, including migration, granulation, mucus plugging, and infection. We then translate these failures into engineering constraints involving geometry, mechanics, fixation, degradation, junctional stress, and remodeling.
Yiwei Xu, Hanqing Dai, Qianwang Ye, Wanlu Zhang, Na Wang, Lei Xiong, Ruiqian Guo   +6 more
wiley   +1 more source

The Unpredictable Effect of Changing Cardiac Output on Hypoxemia after Acute Pulmonary Thromboembolism

Clinical Medicine Insights: Circulatory, Respiratory and Pulmonary Medicine, 2008
Previous studies reported that the degree of hypoxemia following acute pulmonary thromboembolism (APTE) was highly variable and that its mechanism was mainly due to the creation of many high and low ventilation/perfusion (V/Q) units, as a result of the ...
John Y. C. Tsang, Wayne J. E. Lamm, Blazej Neradilek, Nayak L. Polissar, Michael P. Hlastala   +4 more
doaj   +1 more source

Ventilation/perfusion distributions revisited

, 2016
Purpose of reviewA major cause of hypoxemia in anesthesia is ventilation-perfusion (V-A/Q) mismatch. With more advanced surgery and an aging population, monitoring of V-A/Q is of increasing importance.Recent findingsThe classic multiple inert gas ...
Baumgardner, James E.,, Hedenstierna, Göran,   +1 more
core   +1 more source

Complication Rates Associated With Evolving Practice Patterns in Vasopressor Use and Fluid Administration for Oral Cavity Cancer Free Flap Reconstruction

Head &Neck, EarlyView.
ABSTRACT Background The safety of vasopressors for managing intraoperative hypotension remains debated. This study evaluated complications associated with vasopressor use and fluid administration in oral cavity cancer free flap surgery. Methods Retrospective review of 826 patients who received oral cavity cancer free flap reconstruction from 2008 to ...
Harrison Gao, Nuwan Dharmawardana, Alex O. Esemezie, Hedyeh Ziai, Philopateer Ataalla, Natalie Weisbrod, Konrado Deutsch, Stuart A. McCluskey, Danny Enepekides, Kevin M. Higgins, Antoine Eskander, John R. de Almeida, David P. Goldstein, Ralph W. Gilbert, Jonathan C. Irish, Dale H. Brown, Christopher M. K. L. Yao, Christopher W. Noel, Sharon Tzelnick   +18 more
wiley   +1 more source

Ponto ótimo cardiorrespiratório: uma variável submáxima do teste cardiopulmonar de exercício Cardiorespiratory optimal point: a submaximal variable of the cardiopulmonary exercise testing

Arquivos Brasileiros de Cardiologia, 2012
FUNDAMENTO: No Teste Cardiopulmonar de Exercício (TCPE) máximo são analisadas diversas variáveis ventilatórias, incluindo o equivalente ventilatório de oxigênio (VE/VO2). O valor mínimo do VE/VO2 reflete a melhor integração entre os sistemas respiratório
Plínio Santos Ramos, Djalma Rabelo Ricardo, Claudio Gil Soares de Araújo   +2 more
doaj  

Comparison of the Hemodynamic Effects of Epinephrine on Blood Pressure Augmentation at 1‐, 3‐, and 5‐Minute Dosing Intervals

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Background Although current cardiopulmonary resuscitation guidelines recommend administering epinephrine at 3‐ to 5‐minute intervals during advanced life support (ALS), scientific evidence for the optimal dosing interval for enhancing hemodynamic ...
Gyo Jin Ahn, Kyoung‐Chul Cha, Junghun Lee, Yae Jun Son, Young‐Il Roh, Woo Jin Jung, Yujin Lee, Hyeon Young Im, Sung Oh Hwang   +8 more
doaj   +1 more source