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Pressure support ventilation

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https://www.readbyqxmd.com/read/29144160/high-flow-nasal-cannula-oxygen-in-adults-an-evidence-based-assessment
#1
Matthew G Drake
High flow nasal cannula oxygenation has distinct advantages over other oxygen devices due to its unique effects on respiratory physiology. In particular, adjustable oxygen delivery and flow-dependent carbon dioxide clearance from the upper airway reduce work of breathing and can better match inspiratory demand during respiratory distress. Historically, few studies had evaluated whether the physiologic effects of these devices translated into clinical benefit. However, recent publications have begun to address this knowledge gap...
November 16, 2017: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29140969/risk-factors-for-ventilator-associated-events-in-a-picu
#2
Raeley Guess, Jarin Vaewpanich, Jorge A Coss-Bu, Siriporn Phongjitsiri, Curtis Kennedy, Jeffrey Starke, Satid Thammasitboon
OBJECTIVE: The term ventilator-associated events includes ventilator-associated condition, infection-related ventilator-associated complication, and ventilator-associated pneumonia. We sought to identify potential new risk factors for ventilator-associated condition and infection-related ventilator-associated complication in the PICU population. DESIGN: Matched case control study. SETTING: Children's hospital at a tertiary care academic medical center...
November 14, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/29129151/false-positive-diagnosis-of-brain-death-following-the-pediatric-guidelines-case-report-and-discussion
#3
D Alan Shewmon
A 2-year-old boy with severe head trauma was diagnosed brain dead according to the 2011 Pediatric Guidelines. Computed tomographic (CT) scan showed massive cerebral edema with herniation. Intracranial pressures were extremely high, with cerebral perfusion pressures around 0 for several hours. An apnea test was initially contraindicated; later, one had to be terminated due to oxygen desaturation when the Pco2 had risen to 57.9 mm Hg. An electroencephalogram (EEG) was probably isoelectric but formally interpreted as equivocal...
December 2017: Journal of Child Neurology
https://www.readbyqxmd.com/read/29128780/apnea-testing-using-the-oxygen-insufflation-method-for-diagnosis-of-brain-death-may-compromise-pulmonary-function
#4
Joanna Sołek-Pastuszka, Marcin Sawicki, Waldemar Iwańczuk, Klaudyna Kojder, Wojciech Saucha, Zenon Czajkowski, Kornel Chełstowski, Romuald Bohatyrewicz
INTRODUCTION: The aim of our study was to compare the reliability and safety of the classical I-AT with the continuous positive airway pressure apnea test (CPAP-AT). MATERIAL AND METHODS: In the group of 48 patients (group O), an I-AT was performed at the end of BD diagnostic procedures, and approximately 1-1.5h later CPAP-AT with 100% FiO2 and CPAP of 10cm H2O, provided by ventilator in CPAP mode. After pre‑oxygenation with 100% FiO2 for 10min, the PaO2/FiO2 ratio was recorded prior to I-AT at time-point one (T1) and prior to CPAP-AT at time-point two (T2)...
October 28, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/29118839/acute-angle-closure-glaucoma-a-potential-blind-spot-in-critical-care
#5
Anna Petsas, George Chapman, Richard Stewart
We report a case of a 69-year-old gentleman who developed an acutely painful eye with loss of visual acuity whilst on the critical care unit. He was admitted three days previously with an infective exacerbation of chronic obstructive pulmonary disease requiring invasive mechanical ventilation. In addition, he received intravenous antibiotics, steroids, nebulised bronchodilators and intravenous aminophylline, together with noradrenaline for blood pressure support. On development of visual symptoms, an emergency ophthalmology review diagnosed acute angle closure glaucoma...
August 2017: J Intensive Care Soc
https://www.readbyqxmd.com/read/29118307/prevention-of-pulmonary-edema-after-minimally-invasive-cardiac-surgery-with-mini-thoracotomy-using-neutrophil-elastase-inhibitor
#6
Satoshi Yamashiro, Ryoko Arakaki, Yuya Kise, Yukio Kuniyoshi
PURPOSE: Unilateral re-expansion pulmonary edema (RPE) is a rare but one of the most critical complications that may occur after re-expansion of a collapsed lung after minimally invasive cardiac surgery (MICS) with mini-thoracotomy. METHODS: We performed a total of 40 consecutive patients with MICS by right mini-thoracotomy with single-lung ventilation between January 2013 and June 2016. We divided the patients into control group (n = 13) and neutrophil elastase inhibitor group (n = 27)...
November 8, 2017: Annals of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/29117007/ocular-features-of-cerebro-costo-mandibular-syndrome
#7
Zoya Hameed, Simon Taylor, Dan Lindfield
Cerebro-costo-mandibular syndrome is a rare hereditary disorder characterised by micrognathia, posterior rib gaps, and secondary developmental delay. Patients often require ventilation and feeding support throughout life. We describe the first reported ophthalmic findings of CCMS and propose that defects in choroidal permeability lead to chronic macular oedema and refractory aqueous misdirection syndrome. Here we discuss the medical and surgical management concerns of recurrent angle closure and raised intraocular pressure in a CCMS patient...
November 7, 2017: Journal of Glaucoma
https://www.readbyqxmd.com/read/29115949/neurally-adjusted-ventilatory-assist-nava-or-pressure-support-ventilation-psv-during-spontaneous-breathing-trials-in-critically-ill-patients-a-crossover-trial
#8
Juliana C Ferreira, Fabia Diniz-Silva, Henrique T Moriya, Adriano M Alencar, Marcelo B P Amato, Carlos R R Carvalho
BACKGROUND: Neurally Adjusted Ventilatory Assist (NAVA) is a proportional ventilatory mode that uses the electrical activity of the diaphragm (EAdi) to offer ventilatory assistance in proportion to patient effort. NAVA has been increasingly used for critically ill patients, but it has not been evaluated during spontaneous breathing trials (SBT). We designed a pilot trial to assess the feasibility of using NAVA during SBTs, and to compare the breathing pattern and patient-ventilator asynchrony of NAVA with Pressure Support (PSV) during SBTs...
November 7, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29108615/noninvasive-positive-pressure-ventilatory-support-begins-during-sleep
#9
REVIEW
John R Bach
The goal of sleep doctors has been to titrate away apneas and hypopneas using noninvasive ventilation, a term that has become synonymous with continuous positive airway pressure and bilevel positive airway pressure at the lowest effective bilevel settings. It is now time to appreciate noninvasive ventilatory support as an alternative to invasive mechanical ventilation. This article discusses mechanisms of action, two paradigms, and ancillary techniques for noninvasive ventilatory support.
December 2017: Sleep Medicine Clinics
https://www.readbyqxmd.com/read/29108606/positive-airway-pressure-device-technology-past-and-present-what-s-in-the-black-box
#10
REVIEW
Lee K Brown, Shahrokh Javaheri
Since the introduction of continuous positive airway pressure (PAP) for the treatment of obstructive sleep apnea (OSA) in 1981, PAP technology has diversified exponentially. Compact and quiet fixed continuous PAP flow generators, autotitrating PAP devices, and bilevel PAP devices that can treat multiple sleep-disordered breathing phenotypes including OSA, central sleep apnea (CSA), combinations of OSA and CSA, and hypoventilation are available. Adaptive servo-ventilators can suppress Hunter-Cheyne-Stokes breathing and CSA and treat coexisting obstructive events...
December 2017: Sleep Medicine Clinics
https://www.readbyqxmd.com/read/29106923/impact-of-objective-echocardiographic-criteria-for-timing-of-congenital-diaphragmatic-hernia-repair
#11
Scott Deeney, Lisa W Howley, Maggie Hodges, Kenneth W Liechty, Ahmed I Marwan, Jason Gien, John P Kinsella, Timothy M Crombleholme
OBJECTIVE: To assess the impact of specific echocardiographic criteria for timing of congenital diaphragmatic hernia repair on the incidence of acute postoperative clinical decompensation from pulmonary hypertensive crisis and/or acute respiratory decompensation, with secondary outcomes including survival to discharge, duration of ventilator support, and length of hospitalization. STUDY DESIGN: The multidisciplinary congenital diaphragmatic hernia management team instituted a protocol in 2012 requiring the specific criterion of echocardiogram-estimated pulmonary artery pressure ≤80% systemic blood pressure before repairing congenital diaphragmatic hernias...
October 26, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/29084009/microvascular-reactivity-assessed-by-near-infrared-spectroscopy-and-a-vascular-occlusion-test-is-associated-with-patient-outcomes-following-cardiac-surgery-a-prospective-observational-study
#12
Ethan Butler, Sajeev Mahendran, John Nguyen, Anders Aneman
BACKGROUND: Microvascular dysfunction in patients admitted to the ICU following cardiac surgery may be related to perioperative complications and increased resource utilisation even in the presence of acceptable systemic haemodynamic variables. OBJECTIVES: To assess the relationship between microvascular impairment using peripheral near-infrared spectroscopy at ICU admission and 6 h postadmission and the duration of mechanical ventilatory support, length of stay in ICU and in hospital...
October 27, 2017: European Journal of Anaesthesiology
https://www.readbyqxmd.com/read/29080710/conservative-management-in-traumatic-pneumothoraces-an-observational-study
#13
Steven P Walker, Shaney L Barratt, Julian Thompson, Nick A Maskell
BACKGROUND: Traumatic pneumothoraces are a common consequence of major trauma. Despite this, there is a paucity of literature regarding their optimal management, including the role of conservative treatment. The aim of this study was to assess the treatment, complications and outcomes of traumatic pneumothoraces in patients presenting to a Major Trauma Centre. METHODS: The prospectively collected Trauma Audit and Research Network (TARN) database was used to identify all patients presenting with traumatic pneumothoraces to a UK Major Trauma Centre from April 2012 to December 2016...
October 25, 2017: Chest
https://www.readbyqxmd.com/read/29077984/neurally-adjusted-ventilatory-assist-compared-to-other-forms-of-triggered-ventilation-for-neonatal-respiratory-support
#14
REVIEW
Thomas E Rossor, Katie A Hunt, Sandeep Shetty, Anne Greenough
BACKGROUND: Effective synchronisation of infant respiratory effort with mechanical ventilation may allow adequate gas exchange to occur at lower peak airway pressures, potentially reducing barotrauma and volutrauma and development of air leaks and bronchopulmonary dysplasia. During neurally adjusted ventilatory assist ventilation (NAVA), respiratory support is initiated upon detection of an electrical signal from the diaphragm muscle, and pressure is provided in proportion to and synchronous with electrical activity of the diaphragm (EADi)...
October 27, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29077665/biphasic-cuirass-ventilation-during-anesthesia-for-tracheobronchial-stent-insertion-or-removal-by-a-rigid-bronchoscope-a-case-report
#15
Hideaki Mori, Atsuko Shono, Ritsuko Hirade, Tetsuro Nikai, Yoji Saito
Airway management and ventilation during a tracheobronchial stenting procedure are challenging given that mandatory positive pressure ventilation cannot be fully achieved while using a rigid bronchoscope due to leakage from the scope tip. Biphasic cuirass ventilation is a negative pressure ventilation method using an external cuirass fitted to the anterior chest, which could assist in spontaneous breathing and ventilation support. We report 3 successful anesthesia cases in which we could maintain adequate ventilation and oxygenation, supported by biphasic cuirass ventilation, in patients undergoing tracheobronchial stent placement or removal procedures using rigid bronchoscopy...
October 26, 2017: A & A Case Reports
https://www.readbyqxmd.com/read/29072677/the-impact-of-neurally-adjusted-ventilatory-assist-mode-on-respiratory-severity-score-and-energy-expenditure-in-infants-a-randomized-crossover-trial
#16
J L Rosterman, E K Pallotto, W E Truog, H Escobar, K A Meinert, A Holmes, H Dai, W M Manimtim
OBJECTIVE: Examine respiratory severity scores (RSS) (mean airway pressure × fraction of inspired oxygen) and resting energy expenditure (REE) on neurally adjusted ventilatory assist (NAVA) compared with synchronized intermittent mandatory ventilation with pressure controlled and supported breath (SIMV (PC)PS). STUDY DESIGN: A randomized, crossover trial in a level IV neonatal intensive care unit. Twenty-four patients were ventilated with NAVA or SIMV (PC) PS for 12 h and then crossed over to the alternative mode for 12 h...
October 26, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/29066588/effect-of-high-flow-nasal-cannula-on-expiratory-pressure-and-ventilation-in-infant-pediatric-and-adult-models
#17
Katie R Nielsen, Laura E Ellington, Alan J Gray, Larissa I Stanberry, Lincoln S Smith, Robert M DiBlasi
BACKGROUND: Heated and humidified high-flow nasal cannula (HFNC) is a widely used form of respiratory support; however, data regarding optimal flows for a given patient size or disease state are lacking. A comprehensive study of the physiologic effects of HFNC is needed to better understand the mechanisms of action. The objective of the current study was to quantify the effect of HFNC settings in age-specific, anatomically correct nasal airways and spontaneously breathing lung models...
October 24, 2017: Respiratory Care
https://www.readbyqxmd.com/read/29066585/use-of-cardiac-cycle-locating-to-minimize-the-influence-of-cardiac-artifacts-on-esophageal-pressure-measurement-during-dynamic-occlusion-test
#18
Xuan He, Xiu-Mei Sun, Guang-Qiang Chen, Yan-Lin Yang, Zhong-Hua Shi, Ming Xu, Jian-Xin Zhou
BACKGROUND: The dynamic occlusion test is used to guide balloon catheter placement during esophageal pressure (Pes) monitoring. We introduced a cardiac cycle locating method to attenuate the influence of cardiac artifacts on Pes measurement. The aim was to provide a reliable analytic algorithm for the occlusion test. METHODS: Esophageal balloon catheters were placed in subjects receiving pressure support ventilation. During balloon position adjustment, end-expiratory occlusion was performed to induce 3 consecutive inspiratory efforts...
October 24, 2017: Respiratory Care
https://www.readbyqxmd.com/read/29064179/a-case-of-hypothermia-on-crrt
#19
Gurwant Kaur, Prameela Banoth, Preethi Yerram, Madhukar Misra
A 64-year-old Asian man, with past medical history of hypertension, hypothyroidism, and hyperlipidemia, presented with 3 days history of fever associated with cough and worsening shortness of breath. Subsequent clinical course was complicated by acute lung injury leading to acute respiratory distress syndrome requiring positive pressure ventilation, septic shock requiring inotropic support, and acute kidney injury requiring continuous renal replacement therapy (CRRT). On day 3 of CRRT, the patient developed significant hypothermia (temporal temperature 27...
October 2017: Hemodialysis International
https://www.readbyqxmd.com/read/29060706/development-of-respiratory-function-monitor-for-neonates
#20
Fumihiko Takatori, Shinichiro Inoue, Satoru Togo, Shinji Yamamori
Approximately, 10 million babies do not breathe immediately at birth and some of them require positive pressure ventilation. However, inappropriate and excessive tidal volume delivery could lead to lung injury in neonatal patients. We developed a respiratory function monitor which can monitor mask leak, expiratory tidal volume, respiratory rate, peak inspiratory pressure, and end-tidal CO2 on a real-time basis. A neonatal flow sensor was specially designed and was integrated with a small mainstream capnometer, cap-ONE...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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