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High frequency ventilation

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https://www.readbyqxmd.com/read/28640969/control-of-breathing-and-ventilatory-acclimatization-to-hypoxia-in-deer-mice-native-to-high-altitudes
#1
Catherine M Ivy, Graham R Scott
AIM: We compared the control of breathing and heart rate by hypoxia between high- and low-altitude populations of Peromyscus mice, to help elucidate the physiological specializations that help high-altitude natives cope with O2 limitation. METHODS: Deer mice (P. maniculatus) native to high altitude and congeneric mice native to low altitude (P. leucopus) were bred in captivity at sea level. The F1 progeny of each population were raised to adulthood and then acclimated to normoxia or hypobaric hypoxia (12 kPa, simulating hypoxia at ~4300 m) for 5 months...
June 22, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28634172/identifying-an-oxygenation-index-threshold-for-increased-mortality-in-acute-respiratory-failure
#2
Brandon G Hammond, Pamela Garcia-Filion, Paul Kang, Mounica Y Rao, Brigham C Willis, Heidi J Dalton
BACKGROUND: The objective of this work was to examine current oxygenation index (OI) data and outcomes using electronic medical record data to identify a specific OI value associated with mortality. METHODS: This study was a retrospective electronic medical record data review from the pediatric ICU of Phoenix Children's Hospital, with data mining for variables to calculate OIs on subjects age 1 month to 20 y mechanically ventilated >24 h, excluding those with known intracardiac shunts or cyanotic heart disease...
June 20, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28625243/-experimental-study-on-effect-of-airway-pressure-on-cardiopulmonary-resuscitation
#3
Dingyu Tan, Feng Sun, Yangyang Fu, Shihuan Shao, Yazhi Zhang, Yingying Hu, Jun Xu, Huadong Zhu, Xuezhong Yu
OBJECTIVE: To observe the effect of different airway pressure on ventilation, organ perfusion and return of spontaneous circulation (ROSC) of cardiac arrest (CA) pigs during cardiopulmonary resuscitation (CPR), and to explore the possible beneficial mechanism of positive airway pressure during CPR. METHODS: Twenty healthy landrace pigs of clean grade were divided into low airway pressure group (LP group, n = 10) and high airway pressure group (HP group, n = 10) with random number table...
June 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28615341/high-frequency-epidural-stimulation-across-the-respiratory-cycle-evokes-phrenic-short-term-potentiation-after-incomplete-cervical-spinal-cord-injury
#4
Elisa J Gonzalez-Rothi, Kristi A Streeter, Marie H Hanna, Anna C Stamas, Paul J Reier, David M Baekey, David D Fuller
C2 spinal hemilesion (C2Hx) paralyzes the ipsilateral diaphragm, but recovery is possible through activation of "crossed spinal" synaptic inputs to ipsilateral phrenic motoneurons. We tested the hypothesis that high frequency epidural stimulation (HF-ES) would potentiate ipsilateral phrenic output after subacute and chronic C2Hx. HF-ES (300 Hz) was applied to the ventrolateral C4 or T2 spinal cord ipsilateral to C2Hx in anesthetized and mechanically ventilated adult rats. Stimulus duration was 60-sec and currents ranged from 100-1000 µA...
June 14, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28612254/effect-of-urban-design-on-microclimate-and-thermal-comfort-outdoors-in-warm-humid-dar-es-salaam-tanzania
#5
Moohammed Wasim Yahia, Erik Johansson, Sofia Thorsson, Fredrik Lindberg, Maria Isabel Rasmussen
Due to the complexity of built environment, urban design patterns considerably affect the microclimate and outdoor thermal comfort in a given urban morphology. Variables such as building heights and orientations, spaces between buildings, plot coverage alter solar access, wind speed and direction at street level. To improve microclimate and comfort conditions urban design elements including vegetation and shading devices can be used. In warm-humid Dar es Salaam, the climate consideration in urban design has received little attention although the urban planning authorities try to develop the quality of planning and design...
June 14, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28606851/cardiorespiratory-action-of-opioid-tachykinin-agonist-peptide-hybrid-in-anaesthetized-rats-transduction-pathways
#6
Piotr Wojciechowski, Małgorzata Szereda-Przestaszewska, Andrzej Wojciech Lipkowski
AWL3106 composed of opioid (dermorphin) and tachykinin (substance P7-11) pharmacophores is a new compound with high analgesic potency and markedly reduced ability to induce tolerance and dependence. The present study aimed to determine the respiratory and cardiovascular responses evoked by this peptide in urethane-chloralose anaesthetized, spontaneously breathing rats in the presence or absence of vagal connection. Intravenous injection of AWL3106 at a dose of 0.3μmol/kg in intact rats resulted in apnoea lasting 5...
June 9, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28604833/chest-mri-under-pulsatile-flow-ventilation-a-new-promising-technique
#7
Catherine Beigelman-Aubry, Nicolas Peguret, Matthias Stuber, Jean Delacoste, Bastien Belmondo, Alban Lovis, Julien Simons, Olivier Long, Kathleen Grant, Gregoire Berchier, Chantal Rohner, Gabriele Bonanno, Simone Coppo, Juerg Schwitter, Mahmut Ozsahin, Salah Qanadli, Reto Meuli, Jean Bourhis
OBJECTIVES: Magnetic resonance imaging (MRI) of the chest has long suffered from its sensitivity to respiratory and cardiac motion with an intrinsically low signal to noise ratio and a limited spatial resolution. The purpose of this study was to perform chest MRI under an adapted non invasive pulsatile flow ventilation system (high frequency percussive ventilation, HFPV®) allowing breath hold durations 10 to 15 times longer than other existing systems. METHODS: One volunteer and one patient known for a thymic lesion underwent a chest MRI under ventilation percussion technique (VP-MR)...
2017: PloS One
https://www.readbyqxmd.com/read/28599662/a-randomized-controlled-pilot-study-to-evaluate-the-effect-of-an-enteral-formulation-designed-to-improve-gastrointestinal-tolerance-in-the-critically-ill-patient-the-spirit-trial
#8
Stephan M Jakob, Lukas Bütikofer, David Berger, Michael Coslovsky, Jukka Takala
BACKGROUND: Diarrhea is frequent in patients in intensive care units (ICU) and is associated with discomfort and complications and may increase the length of stay and nursing workload. METHODS: This was a prospective, double-blind, randomized, controlled single-center pilot study to assess the incidence and frequency of diarrhea and the respective effects of a modified enteral diet (intervention: Peptamen® AF, rich in proteins, medium chain triglycerides and fish oil) compared to a standard diet (control: Isosource® Energy) in 90 randomized adult patients (intervention, n = 46; control, n = 44) with an ICU stay ≥5 days and tube feeding ≥3 days...
June 10, 2017: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/28595689/high-frequency-oscillatory-ventilation-hfov-as-primary-ventilator-strategy-in-the-management-of-severe-acute-respiratory-distress-syndrome-ards-with-pneumothorax-in-the-setting-of-trauma
#9
Patrizio Petrone, Kartik Prabhakaran, Daniel Hagler, Dominick Vitale, Alejandro Betancourt, Corrado P Marini
No abstract text is available yet for this article.
May 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28574276/intra-aortic-balloon-pump-protects-against-hydrostatic-pulmonary-oedema-during-peripheral-venoarterial-extracorporeal-membrane-oxygenation
#10
Nicolas Bréchot, Pierre Demondion, Francesca Santi, Guillaume Lebreton, Tai Pham, Apostolos Dalakidis, Laetitia Gambotti, Charles-Edouard Luyt, Matthieu Schmidt, Guillaume Hekimian, Philippe Cluzel, Jean Chastre, Pascal Leprince, Alain Combes
BACKGROUND: Increased left ventricular afterload during peripheral venoarterial-extracorporeal membrane oxygenation (VA-ECMO) support frequently causes hydrostatic pulmonary oedema. Because physiological studies demonstrated left ventricular afterload decrease during VA-ECMO assistance combined with the intra-aortic balloon pump (IABP), we progressively changed our standard practice systematically to associate an IABP with VA-ECMO. This study aimed to evaluate IABP efficacy in preventing pulmonary oedema in VA-ECMO-assisted patients...
June 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/28571898/-recommendations-for-respiratory-support-in-the-newborn-iv-high-frequency-ventilation-ex-utero-intrapartum-treatment-exit-extracorporeal-membrane-oxygenation-ecmo
#11
Félix Castillo Salinas, Dolores Elorza Fernández, Antonio Gutiérrez Laso, Julio Moreno Hernando, Gerardo Bustos Lozano, Manuel Gresa Muñoz, Xavier Miracle Echegoyen
The recommendations included in this document will be part a series of updated reviews of the literature on respiratory support in the newborn infant. These recommendations are structured into 12 modules, and in this work module 8 is presented. Each module is the result of a consensus process amongst all members of the Surfactant and Respiratory Group of the Spanish Society of Neonatology. They represent a summary of the published papers on each specific topic, as well as the clinical experience of each one of the members of the group...
May 29, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/28570147/estimating-arterial-partial-pressure-of-carbon-dioxide-in-ventilated-patients-how-valid-are-surrogate-measures
#12
Boulos S Nassar, Gregory A Schmidt
The arterial partial pressure of carbon dioxide (PaCO2) is an important parameter in critically ill, mechanically ventilated patients. To limit invasive procedures or for more continuous monitoring of PaCO2, clinicians often rely on venous blood gases, capnography, or transcutaneous monitoring. Each of these has advantages and limitations. Central venous Pco2 allows accurate estimation of PaCO2, differing from it by an amount described by the Fick principle. As long as cardiac output is relatively normal, central venous Pco2 exceeds the arterial value by approximately 4 mm Hg...
June 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/28567320/pneumoperitoneum-without-intestinal-perforation-in-a-neonate-case-report-and-literature-review
#13
Prabhavathi Gummalla, Gratias Mundakel, Maksim Agaronov, Haesoon Lee
Pneumoperitoneum in a preterm neonate usually indicates perforation of the intestine and is considered a surgical emergency. However, there are cases of pneumoperitoneum with no evidence of rupture of the intestine reported in the literature. We report a case of pneumoperitoneum with no intestinal perforation in a preterm neonate with respiratory distress syndrome who was on high frequency oscillatory ventilation (HFOV). He developed bilateral pulmonary interstitial emphysema with localized cystic lesion, likely localized pulmonary interstitial emphysema, and recurrent pneumothoraces...
2017: Case Reports in Pediatrics
https://www.readbyqxmd.com/read/28558953/are-heart-rate-dynamics-in-the-transition-from-rest-to-submaximal-exercise-related-to-maximal-cardiorespiratory-responses-in-copd
#14
Adriana Mazzuco, Wladimir Musetti Medeiros, Aline Soares de Souza, Maria Clara Noman Alencar, José Alberto Neder, Audrey Borghi-Silva
BACKGROUND: Poor exercise capacity is an important negative prognostic marker in patients with chronic obstructive pulmonary disease (COPD). Heart rate variability (HRV) responses can indicate alterations in cardiac autonomic control. Nevertheless, it remains unclear whether these abnormalities are related to cardiorespiratory responses to exercise in these patients. OBJECTIVE: To evaluate whether HRV at rest and submaximal exercise are related to impaired cardiopulmonary responses to exercise in COPD patients...
May 20, 2017: Brazilian Journal of Physical Therapy
https://www.readbyqxmd.com/read/28556503/occurrence-and-human-exposure-assessment-of-organophosphate-flame-retardants-opfrs-in-indoor-dust-from-various-microenvironments-of-the-rhine-main-region-germany
#15
Lingli Zhou, Marco Hiltscher, Wilhelm Püttmann
We analyzed organophosphate flame retardants (OPFRs) in 74 indoor dust samples collected from seven microenvironments (building material markets, private cars, daycare centers, private homes, floor/carpet stores, offices, and schools) in the Rhine/Main region of Germany. Ten of 11 target OPFRs were ubiquitously detected, some with more than 97% detection frequency, including tris(1,3-dichloroisopropyl)phosphate (TCIPP), tris(2-butoxyethyl)phosphate (TBOEP), triphenyl phosphate (TPHP), and tris(isobutyl) phosphate (TIBP)...
May 29, 2017: Indoor Air
https://www.readbyqxmd.com/read/28546374/pediatric-ards
#16
Ira M Cheifetz
The Pediatric Acute Lung Injury Consensus Conference (PALICC) has provided the critical care community with the first pediatric-focused definition for ARDS. The PALICC recommendations provide guidance on conventional ventilator management, gas exchange goals, use of high-frequency ventilation, adjunct management approaches, and the application of extracorporeal membrane oxygenation for pediatric ARDS (PARDS). Although outcomes for PARDS have improved over the past decade, mortality and morbidity remain significant...
June 2017: Respiratory Care
https://www.readbyqxmd.com/read/28541772/fungal-levels-in-houses-in-the-fukushima-daiichi-nuclear-power-plant-evacuation-zone-after-the-great-east-japan-earthquake
#17
Naohide Shinohara, Masahiro Tokumura, Kazuhiro Hashimoto, Katsuyoshi Asano, Yuji Kawakami
Residences located within 20 km of the damaged Fukushima Daiichi nuclear power plant were evacuated shortly after the Great East Japan Earthquake. The levels of airborne and surface fungi were measured in six houses in the evacuation zone in August 2012 and February 2013. Airborne fungal levels in all of the houses in the summer were higher than the environmental standard levels for residential houses published in Architectural Institute of Japan (>1,000 CFU/m(3)). In two houses whose residents rarely returned to visit, fungal levels were extremely high (> 52,000 CFU/m(3))...
May 25, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28539301/-anesthesia-management-in-robotic-assisted-esophagectomy-with-triple-incisions-analysis-of-53-cases
#18
Xiao-Qing Liu, Tian-Hua Zhang, Jing Cheng, Hui-Ting Li, Long-Hui Cao, Zi-Hui Tan, Wen-Qian Lin
Between March, 2016 and January, 2017, 53 patients underwent robotic-assisted esophagectomy with triple incisions. All the patients were intubated with Double lumen endotracheal tub with one-lung ventilation and CO2 pneumoperitoneum, and CO2 pneumothorax was used in 7 cases. Most of the patients could tolerate OLV and CO2 pneumoperitoneum, and 4 patients with CO2 pneumothorax had hypoxemia and required double-lung ventilation or high frequency ventilation; 15 patients developed postoperative pulmonary complications and were transferred to ICU...
May 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28530309/-monitoring-units-in-departments-of-internal-medicine-frequency-impact-and-satisfaction
#19
David Raveh-Brawer, Tanya Itzekson, Ruth Henshke-Bar-Meir, Noa Sylvetsky, Reuven Friedmann, Ranana Siegman, Tanya Mor, Moshe Hersch, Amos M Yinnon, Shoshana Zevin
BACKGROUND: Due to increasing numbers of elderly, seriously ill patients and shortage of ICU beds, many hospitals have established monitoring units (MU) in their medical departments. OBJECTIVES: (1) To assess the national prevalence of MUs in medical departments; (2) to determine the outcome of consecutively admitted MU patients; (3) to evaluate patient/ family satisfaction with care. METHODS: The case control study included all 123 patients hospitalized in the MU during a 5-month period, compared with two control groups: (1) 123 patients admitted to medical departments, matched at a ratio of 1:1 by gender, age±10 years and mechanical ventilation; (2) all 52 medical patients treated in the ICU...
January 2017: Harefuah
https://www.readbyqxmd.com/read/28522369/electroencephalographic-monitoring-during-sevoflurane-anaesthesia-in-an-amyotrophic-lateral-sclerosis-patient-with-locked-in-state
#20
Kazuko Hayashi, Ryuhei Araki, Akiko Tanaka
Recently, the cognitive abilities of patients with amyotrophic lateral sclerosis (ALS) have been found to be impaired along with the neurodegeneration of motor neurons. Electroencephalography (EEG) of end-stage ALS patients has reportedly shown specific features based on neuronal network modulations, differing from EEG of other patients with cognitive failure and dementia. However, EEG of end-stage ALS patients during anaesthesia has not yet been reported. A 64-year-old male ALS patient with locked-in state (LIS), supported by tracheostomy positive-pressure ventilation (TPPV) and enteral nourishment for 9years, underwent scheduled general anaesthesia for repair of a fractured mandible...
May 15, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
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