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High frequency ventilation

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https://www.readbyqxmd.com/read/29778239/time-dependent-changes-in-cardiorespiratory-functions-of-anesthetized-rats-exposed-to-sustained-hypoxia
#1
Kouki Kato, Ryosuke Morinaga, Seigo Fushuku, Nobuaki Nakamuta, Yoshio Yamamoto
Although cardiovascular responses may be altered by respiratory changes under prolonged hypoxia, the relationship between respiratory and cardiovascular changes remains unknown. The aim of the present study is to clarify cardiorespiratory changes in anesthetized rats during and after hypoxic conditions using simultaneous recordings of cardiorespiratory variables with 20-sec recording intervals. After air breathing for 20 min (pre-exposure period), rats were subjected to 10% O2 for 2 h (hypoxic exposure period) and then air for 30 min (recovery period)...
July 2018: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29771608/paced-breathing-and-phrenic-nerve-responses-evoked-by-epidural-stimulation-following-complete-high-cervical-spinal-cord-injury-in-rats
#2
Tatiana Bezdudnaya, Michael A Lane, Vitaliy Marchenko
Spinal cord injury (SCI) at the level of cervical segments often results in life-threatening respiratory complications and requires long-term mechanical ventilator assistance. Thus, restoring diaphragm activity and regaining voluntary control of breathing are the primary clinical goals for patients with respiratory dysfunction following cervical SCI. Epidural stimulation (EDS) is a promising strategy that has been explored extensively for non-respiratory functions, and to a limited extent within the respiratory system...
May 17, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29769190/pneumoperitoneum-in-a-neonate-weighing-less-than-500-g-what-do-we-really-know-about-it
#3
Audrienne Sammut, Miguel Soares Oliveira, Claire Jackson, Cristine Sortica da Costa
Pneumoperitoneum in preterm infants is a surgical emergency as it is usually indicative of intestinal perforation. Rare cases of idiopathic pneumoperitoneum have been described in the literature, the underlying causes and pathophysiology of which remain uncertain. We present a case of pneumoperitoneum in an extremely preterm infant with severe growth restriction. This occurred while she was receiving high frequency oscillatory ventilation. She had respiratory distress syndrome with pulmonary interstitial emphysema...
May 16, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29755094/-giant-intrathoracic-goiter-requiring-emergency-airway-management-report-of-a-case
#4
Marina Shiikawa, Kazuki Hayasaka, Kei Yarimizu, Katsuyuki Suzuki, Makoto Endo, Naoki Yanagawa, Satoshi Shiono
An 81-year-old woman with acute respiratory distress was referred to our hospital. Computed tomography showed a large mass in the upper mediastinum with severe tracheal stenosis. Endotracheal intubation was performed under the preparation of extracorporeal membrane oxygenation and high-frequency jet ventilation, and the tumor was completely removed. The pathologic diagnosis was a goiter. Post-operatively, respiratory distress disappeared. No tumor recurrences have been noted for more than 2 years after surgery...
May 2018: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/29746013/accuracy-of-oscillatory-pressure-measured-by-mechanical-ventilators-during-high-frequency-oscillatory-ventilation-in-newborns
#5
Chiara Veneroni, Marta Tossici, Emanuela Zannin, Ilaria Milesi, Raffaele L Dellaca'
BACKGROUND: Oscillatory pressure (ΔP) measurement during high frequency oscillatory ventilation (HFOV) is technically challenging and influenced by all the components of the measurement system. OBJECTIVES: To evaluate the differences between the ΔP delivered at the inlet of the endotracheal tube and those displayed by commercial neonatal mechanical ventilators and monitoring devices and to characterize how the ventilator circuit and the flowmeter proximal to the patient affect these differences...
May 10, 2018: Pediatric Pulmonology
https://www.readbyqxmd.com/read/29744248/high-dose-of-pralidoxime-reverses-paraoxon-induced-respiratory-toxicity-in-mice
#6
Pascal Houzé, Thomas Berthin, Jean-Herlé Raphalen, Alice Hutin, J Frédéric Baud
Objective: The efficiency of pralidoxime in the treatment of human organophosphates poisoning is still unclear. In a rat model, we showed that pralidoxime induced a complete but concentration-dependent reversal of paraoxon-induced respiratory toxicity. The aim of this study was to assess the efficiency of pralidoxime in a species other than rats. Methods: A dose of diethylparaoxon corresponding to 50% of the median lethal dose was administered subcutaneously to male F1B6D2 mice...
April 2018: Turkish Journal of Anaesthesiology and Reanimation
https://www.readbyqxmd.com/read/29743121/high-frequency-oscillatory-ventilation-guided-by-transpulmonary-pressure-in-acute-respiratory-syndrome-an-experimental-study-in-pigs
#7
Philipp Klapsing, Onnen Moerer, Christoph Wende, Peter Herrmann, Michael Quintel, Annalen Bleckmann, Jan Florian Heuer
BACKGROUND: Recent clinical studies have not shown an overall benefit of high-frequency oscillatory ventilation (HFOV), possibly due to injurious or non-individualized HFOV settings. We compared conventional HFOV (HFOVcon ) settings with HFOV settings based on mean transpulmonary pressures (PLmean ) in an animal model of experimental acute respiratory distress syndrome (ARDS). METHODS: ARDS was induced in eight pigs by intrabronchial installation of hydrochloric acid (0...
May 9, 2018: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29741717/influenza-associated-acute-necrotizing-encephalopathy-in-siblings
#8
Ashley Howard, Timothy M Uyeki, Jaime Fergie
Encephalopathy is an important complication associated with influenza, most frequently observed in young children, with a wide range of severity. The most severe category of influenza-associated encephalopathy (IAE) is acute necrotizing encephalopathy (ANE), characterized by high frequency of neurologic sequelae and fatal outcomes. We report two young siblings who developed fever and seizures with altered mental status. Influenza A(H1N1)pdm09 virus infection was identified in upper respiratory tract specimens from both patients, and neuroimaging revealed bilateral inflammatory lesions, consistent with acute necrotizing encephalopathy...
May 4, 2018: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/29741289/grommets-ventilation-tubes-for-recurrent-acute-otitis-media-in-children
#9
REVIEW
Roderick P Venekamp, Paul Mick, Anne Gm Schilder, Desmond A Nunez
BACKGROUND: Acute otitis media (AOM) is one of the most common childhood illnesses. While many children experience sporadic AOM episodes, an important group suffer from recurrent AOM (rAOM), defined as three or more episodes in six months, or four or more in one year. In this subset of children AOM poses a true burden through frequent episodes of ear pain, general illness, sleepless nights and time lost from nursery or school. Grommets, also called ventilation or tympanostomy tubes, can be offered for rAOM...
May 9, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29727946/levels-occurrence-and-human-exposure-to-novel-brominated-flame-retardants-nbfrs-and-dechlorane-plus-dp-in-dust-from-different-indoor-environments-in-hangzhou-china
#10
Jianqiang Sun, Ying Xu, Huabiao Zhou, Anping Zhang, Hong Qi
In this work, sixteen novel brominated flame retardants (NBFRs) and Dechlorane Plus (DP) were investigated in dust samples collected from different indoor environments (home, office, laboratory, classroom and dormitory) in Hangzhou, China. High detection frequencies for most of the congeners were observed, suggesting the widespread use of NBFRs and DP. The mean concentrations of ∑16 NBFRs were 389ngg-1 in the home dust, 1125ngg-1 in the office dust, 204ngg-1 in the laboratory dust, 259ngg-1 in the classroom dust, and 825ngg-1 in the dormitory dust...
August 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29724584/stereotactic-body-radiation-therapy-for-heart-base-tumors-in-six-dogs
#11
L M Magestro, T L Gieger, M W Nolan
INTRODUCTION: Heart-base tumors are increasingly treated with radiotherapy, yet safety and efficacy are incompletely understood. This case series describes outcomes after stereotactic body radiation therapy (SBRT) for presumed chemodectoma. ANIMALS: Six pet dogs. METHODS: A retrospective study was performed, including dogs with a clinical diagnosis of chemodectoma and treatment with three-fraction SBRT (30 Gy total). RESULTS: Heart-base tumors, presumed or confirmed to be chemodectomas, were diagnosed via histopathology or imaging...
April 30, 2018: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
https://www.readbyqxmd.com/read/29701428/anaesthetic-management-in-a-duchennne-muscle-dystrophy-patient-for-treatment-of-recurrent-pneumothorax
#12
Sara Mota, Liuba Germanova, Joana Cortesão, Teresa Paiva
INTRODUCTION: Duchenne muscular dystrophy (DMD) is an x linked recessive disorder. Long term prognosis is ominous, with development of respiratory distress and cardiomyopathy in advanced stage of the disease and expected death in the teens-to-mid 20s due to respiratory or cardiac failure. Peri-operative management of this patients is challenging due to difficult airway anatomy (macroglossia, limited neck and mandibular mobility). Additionally, they are at risk of developing malignant hyperthermia, rhabdomyolysis and hyperkalemic cardiac arrest when exposed to halogenated inhalational anaesthetics and depolarizing muscle relaxants...
July 2017: Revista Portuguesa de Cirurgia Cardio-torácica e Vascular
https://www.readbyqxmd.com/read/29695988/acute-anxiety-predicts-components-of-the-cold-shock-response-on-cold-water-immersion-toward-an-integrated-psychophysiological-model-of-acute-cold-water-survival
#13
Martin J Barwood, Jo Corbett, Heather Massey, Terry McMorris, Mike Tipton, Christopher R D Wagstaff
Introduction: Drowning is a leading cause of accidental death. In cold-water, sudden skin cooling triggers the life-threatening cold shock response (CSR). The CSR comprises tachycardia, peripheral vasoconstriction, hypertension, inspiratory gasp, and hyperventilation with the hyperventilatory component inducing hypocapnia and increasing risk of aspirating water to the lungs. Some CSR components can be reduced by habituation (i.e., reduced response to stimulus of same magnitude) induced by 3-5 short cold-water immersions (CWI)...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29694993/new-ventilator-strategies-high-frequency-oscillatory-ventilation-combined-with-volume-guarantee
#14
M Sánchez-Luna, N González-Pacheco, J Belik, M Santos, F Tendillo
High-frequency oscillatory ventilation (HFOV) has been proposed as an alternative method of invasive ventilation in immature infants to prevent ventilator lung injury. To better control the size of the high-frequency tidal volume and to prevent large tidal volumes, a new strategy of controlling the tidal volume during HFOV (VThf) has been developed, HFOV-volume guarantee (VG). Data from preclinical, neonatal animal studies in normal and surfactant-depleted lungs have demonstrated the feasibility of this technique to directly control the VThf in the normal compliance and low compliance situations...
May 2018: American Journal of Perinatology
https://www.readbyqxmd.com/read/29688922/the-use-of-high-frequency-percussive-ventilation-for-whole-lung-lavage-a-case-report
#15
Sudhakar Kinthala, Mark Liang, Felix Khusid, Sebron Harrison
Whole-lung lavage (WLL) remains the gold standard in the treatment of pulmonary alveolar proteinosis. However, anesthetic management during WLL can be challenging because of the risk of intraoperative hypoxemia and various cardiorespiratory complications of 1-lung ventilation. Here, we describe a novel strategy involving the application of high-frequency percussive ventilation using a volumetric diffusive respirator (VDR-4) during WLL in a 47-year-old woman with pulmonary alveolar proteinosis. Our observations suggest that high-frequency percussive ventilation is a potentially effective ventilation strategy during WLL that may reduce the risk of hypoxemia and facilitate lavage...
April 23, 2018: A&A practice
https://www.readbyqxmd.com/read/29683055/high-frequency-percussive-ventilation-rescue-therapy-in-morbidly-obese-patients-failing-conventional-mechanical-ventilation
#16
Anatoliy Korzhuk, Ashwad Afzal, Ivan Wong, Felix Khusid, Berhane Worku, Iosif Gulkarov
BACKGROUND: Morbidly obese patients with respiratory failure who do not improve on conventional mechanical ventilation (CMV) often undergo rescue therapy with extracorporeal membrane oxygenation (ECMO). We describe our experience with high-frequency percussive ventilation (HFPV) as a rescue modality. METHODS: In a retrospective analysis from 2009 to 2016, 12 morbidly obese patients underwent HFPV after failing to wean from CMV. Data were collected regarding demographics, cause of respiratory failure, ventilation settings, and hospital course outcomes...
January 1, 2018: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/29675732/bias-flow-rate-and-ventilation-efficiency-during-adult-high-frequency-oscillatory-ventilation-a-lung-model-study
#17
Osamu Nagano, Tetsuya Yumoto, Atsunori Nishimatsu, Shunsuke Kanazawa, Takahisa Fujita, Sunao Asaba, Hideo Yamanouchi
BACKGROUND: Bias flow (BF) is essential to maintain mean airway pressure (MAP) and to washout carbon dioxide (CO2 ) from the oscillator circuit during high-frequency oscillatory ventilation (HFOV). If the BF rate is inadequate, substantial CO2 rebreathing could occur and ventilation efficiency could worsen. With lower ventilation efficiency, the required stroke volume (SV) would increase in order to obtain the same alveolar ventilation with constant frequency. The aim of this study was to assess the effect of BF rate on ventilation efficiency during adult HFOV...
April 19, 2018: Intensive Care Medicine Experimental
https://www.readbyqxmd.com/read/29673561/risk-factors-for-death-from-stenotrophomonas-maltophilia-bacteremia
#18
Kayo Osawa, Katsumi Shigemura, Koichi Kitagawa, Issei Tokimatsu, Masato Fujisawa
PURPOSE: Stenotrophomonas maltophilia has low pathogenicity potential, but if it causes bacteremia it can be fatal, because it has shown high resistance to many antibiotics and can be difficult to treat. Patient death from S. maltophilia bacteremia has increased since 2014 in our hospital. In this study, we investigated risk factors for death due to S. maltophilia bacteremia. METHODS: Seventy patients from the hospital database with S. maltophilia bacteremia between January 2010 and July 2017 were investigated...
April 16, 2018: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29670762/rolling-refresher-simulation-improves-performance-and-retention-of-paediatric-intensive-care-unit-nurse-code-cart-management
#19
Marcy N Singleton, Kimberly F Allen, Zhongze Li, Kevin McNerney, Urs H Naber, Matthew S Braga
Introduction: Paediatric Intensive Care Unit Nurses (PICU RNs) manage the code cart during paediatric emergencies at the Children's Hospital at Dartmouth-Hitchcock. These are low -frequency, high-stakes events. Methods: An uncontrolled intervention study with 6-month follow-up. A collaboration of physician and nursing experts developed a rolling-refresher training programme consisting of five simulated scenarios, including 22 code cart skills, to establish nursing code cart competency...
April 2018: BMJ simulation & technology enhanced learning
https://www.readbyqxmd.com/read/29658447/-treatment-and-prognosis-of-pulmonary-hemorrhage-in-preterm-infants-during-2007-2016
#20
Wei-Wei Pan, Xiao-Mei Tong
OBJECTIVE: To study the treatment and prognosis of pulmonary hemorrhage in preterm infants. METHODS: A total of 106 preterm infants diagnosed with pulmonary hemorrhage, who were hospitalized in the neonatal ward of Peking University Third Hospital between 2007 and 2016, were enrolled. These patients were divided into 2007-2011 group (34 cases) and 2012-2016 group (72 cases) according to the time of hospitalization, divided into conventional-frequency ventilation group (43 cases) and high-frequency oscillatory ventilation (HFOV) group (63 cases) according to the respiratory support method used after the development of pulmonary hemorrhage, and divided into non-operation group (34 cases) and operation group (14 cases) according to whether PDA ligation was performed for the unclosed PDA before pulmonary hemorrhage...
April 2018: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
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