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Chi Chan Lee, Dhruti Mankodi, Sameer Shaharyar, Sharmila Ravindranathan, Mauricio Danckers, Pablo Herscovici, Molly Moor, Gustavo Ferrer
INTRODUCTION: Humidified oxygen via a high flow nasal cannula (HFNC) is a form of supplemental oxygen therapy that has significant theoretical advantages over conventional oxygen therapy (COT). However, the clinical role of HFNC in acute hypoxemic respiratory failure (AHRF) has not been well established. This review compares the efficacy of HFNC with COT and non-invasive ventilation (NIV) in patients with AHRF. METHODS: Studies reviewed were selected based on relevance from a systematic literature search conducted in Medline and EMBASE to include all published original research through May 2016...
December 2016: Respiratory Medicine
Sherif Ashaat, Ahmed M Al-Jumaily
During respiration, upper airway (UA) collapse occurs when the forces generated from the negative UA pressures exceed the forces produced by the UA muscles; which leads to loose soft tissue at the back of the mouth. At predetermined titration pressure, the Continuous Positive Airway Pressure (CPAP) normally provides a continuous pressurized and humidified air to prevent airway collapse. However, high titration pressures are not always tolerated by patients and may lead to damaging effects including stroke symptoms for cardiovascular disease patients...
November 9, 2016: Journal of Biomechanics
Yusuke Chikata, Mutsuo Onodera, Jun Oto, Masaji Nishimura
BACKGROUND: High-flow nasal cannula therapy (HFNC) is widely used for patients with acute respiratory failure. HFNC has a number of physiological effects. Although FIO2 is considered to be constant, because HFNC is an open system, FIO2 varies according to inspiratory flow, tidal volume (VT), and HFNC gas flow. We investigated the influence of HFNC gas flow and other respiratory parameters on FIO2 during HFNC. METHODS: We evaluated an HFNC system and, for comparison, a conventional oxygen therapy system...
November 22, 2016: Respiratory Care
Esther Y Cheah, Tracy S Mann, Philip C Burcham, Peter J Henry
INTRODUCTION: The aim of this study was to develop two dynamic ex vivo airway explant systems, a perfusion-superfusion system and a ventilation-superfusion system, for the study of toxic airborne substances, such as the prevalent smoke constituent acrolein. METHODS: Mouse isolated tracheal segments were perfused with physiological media or ventilated with humidified air at 37°C to mimic dynamic flow conditions, and superfused with media over the exterior surface...
November 16, 2016: Journal of Pharmacological and Toxicological Methods
Sandra Giangioppo, Odion Kalaci, Arun Radhakrishnan, Erin Fleischer, Jennifer Itterman, Brian Lyttle, April Price, Dhenuka Radhakrishnan
PURPOSE: To estimate the overall prevalence of complementary and alternative medicine use among children with cystic fibrosis, determine specific modalities used, predictors of use and subjective helpfulness or harm from individual modalities. RESULTS: Of 53 children attending the cystic fibrosis clinic in London, Ontario (100% recruitment), 79% had used complementary and alternative medicine. The most commonly used modalities were air purifiers, humidifiers, probiotics, and omega-3 fatty acids...
November 2016: Complementary Therapies in Clinical Practice
Ha-Ryong Kim, Gi-Wook Hwang, Akira Naganuma, Kyu-Hyuck Chung
Exposure to humidifier disinfectants was identified in 2011 as the potential cause of an outbreak of lung disease in Korea. It is estimated that over 8 million people have been exposed to humidifier disinfectants-chemicals added to the water used in humidifiers to prevent the growth of microorganisms-since their commercial introduction. The primary component of humidifier disinfectant products involved was polyhexamethylene guanidine phosphate (PHMG-P), a guanidine-based antimicrobial agent. Lesions observed in the lungs of patients were similar to those observed in laboratory animals exposed to PHMG-P...
2016: Journal of Toxicological Sciences
Mayra Goncalves Menegueti, Maria Auxiliadora-Martins, Altacilio Aparecido Nunes
BACKGROUND: Moisturizing, heating and filtering gases inspired via the mechanical ventilation (MV) circuits help to reduce the adverse effects of MV. However, there is still no consensus regarding whether these measures improve patient prognosis, shorten MV duration, decrease airway secretion and lower the incidence of ventilator associated pneumonia (VAP) and other complications. OBJECTIVES: The aim of this study was to study the incremental cost-effectiveness ratio associated with the use of heat and moisture exchangers (HME) filter to prevent VAP compared with the heated humidifiers (HH) presently adopted by intensive care unit (ICU) services within the Brazilian Healthcare Unified System...
August 2016: Anesthesiology and Pain Medicine
Ga Won Jeon
The incidence of bronchopulmonary dysplasia (BPD) has not decreased over the last decade. The most important way to decrease BPD is by weaning the patient from the ventilator as soon as possible in order to reduce ventilator-induced lung injury that underlies BPD, and by using a noninvasive ventilator (NIV). Use of a heated, humidified, high flow nasal cannula (HHHFNC), which is the most recently introduced NIV mode for respiratory support in preterm infants, is rapidly increasing in many neonatal intensive care units due to the technical ease of use without sealing, and the attending physician's preference compared to other NIV modes...
October 2016: Korean Journal of Pediatrics
Małgorzata Pawlikowska, Tomasz Jędrzejewski, Jakub Piotrowski, Wiesław Kozak
The aim of the study was to explore whether fever-range hyperthermia (FRH) might enhance the anticancer and immunoregulatory activities of protein-bound polysaccharides (PBP), a class of fungus derived immunomodifiers used in the cancer adjuvant therapy. Blood lymphocytes and breast cancer cells (MCF-7) were cultured at 39.5°C in humidified atmosphere containing 5% CO2 for 2h. After rested at 37°C for 6h, the cells were treated with PBP extract at 100- and 300μg/ml concentration. After indicated time, the proliferative response was analyzed and cytokine mRNA expression assessment was performed by qRT-PCR...
November 5, 2016: Molecular Immunology
Jin Won Huh, Sang Bum Hong, Kyung Hyun Do, Hyun Jung Koo, Se Jin Jang, Moo Song Lee, Domyung Paek, Dong Uk Park, Chae Man Lim, Younsuck Koh
We recently established a novel disease entity presented as progressive respiratory failure associated with the inhalation of humidifier disinfectants. In April 2011, we encountered a series of peripartum patients with complaints of respiratory distress of unknown etiology, which was an uncommon phenomenon. Accordingly, we created a multidisciplinary team comprising intensivists, radiologists, pathologists, epidemiologists, and the Korea Centers for Disease Control and Prevention (KCDC). Further, we defined the disease entity and performed a case-control study, epidemiologic investigation, and animal study to determine the etiology...
December 2016: Journal of Korean Medical Science
Younsuck Koh
No abstract text is available yet for this article.
December 2016: Journal of Korean Medical Science
Anna Lavizzari, Mariarosa Colnaghi, Francesca Ciuffini, Chiara Veneroni, Ivan Cortinovis, Stefano Musumeci, Fabio Mosca
No abstract text is available yet for this article.
November 7, 2016: JAMA Pediatrics
Reyhaneh Alikhani, Mohsen Shahriari, Sina Mobasherizadeh
This study aims to evaluate the effect of the protocol for the preparation of oxygen-moisturizing chamber on the count of its bacteria.This study is a double- group clinical trial before and after intervention, which was carried out in the neurology ward of an educational hospital in Esfahan from July to December 2015. In this study, 64 oxygen humidifying chambers were studied in terms of number and type of microorganisms in two groups of 32 during three phases, before, immediately after, and 6 hours after its intervention...
June 30, 2016: Global Journal of Health Science
Qi Sun, Hongming He, Wen-Yang Gao, Briana Aguila, Lukasz Wojtas, Zhifeng Dai, Jixue Li, Yu-Sheng Chen, Feng-Shou Xiao, Shengqian Ma
The sophisticated control of surface wettability for target-specific applications has attracted widespread interest for use in a plethora of applications. Despite the recent advances in modification of non-porous materials, surface wettability control of porous materials, particularly single crystalline, remains undeveloped. Here we contribute a general method to impart amphiphobicity on single-crystalline porous materials as demonstrated by chemically coating the exterior of metal-organic framework (MOF) crystals with an amphiphobic surface...
October 31, 2016: Nature Communications
Hai-Ning Li, Shao-Lin Zhao, Jin Yang, Wei Li
OBJECTIVE: To explore the change trend of cell viability, apoptosis and reactive oxygen species (ROS) production of peripheral blood neutrophils in in vitro culture. METHODS: Neutrophils were isolated by density gradient centrifugation and cultured in medium containing 10% fetal bovine serum for diffentrent times in a fall humidified atmosphere with 5% CO2 at 37 °C. Cell viability, spontaneous apoptosis and ROS level were detected by flow cytometry at 0, 24, 48, 72 and 96 hours...
October 2016: Zhongguo Shi Yan Xue Ye Xue za Zhi
Arvo Tullus, Priit Kupper, Ants Kaasik, Hardi Tullus, Krista Lõhmus, Anu Sõber, Arne Sellin
The interactive effects of climate variables and tree-tree competition are still insufficiently understood drivers of forest response to global climate change. Precipitation and air humidity are predicted to rise concurrently at high latitudes of the Northern Hemisphere. We investigated if the growth response of deciduous trees to elevated air humidity varies with their competitive status. The study was conducted in seed-originated silver birch and monoclonal hybrid aspen stands grown at the Free Air Humidity Manipulation (FAHM) experimental site in Estonia, in which manipulated stands (n = 3 for both species) are exposed to artificially elevated relative air humidity (6-7% over the ambient level)...
October 25, 2016: Global Change Biology
Ashutosh Naik, David V Shepherd, Jennifer H Shepherd, Serena M Best, Ruth E Cameron
The aim of this study is to explore the importance of the potentially competing effects of buffering effects of the calcium phosphate filler and particle-mediated water sorption on the degradation products of poly(d,l lactide-co-glycolide (50:50))(PLGA)/hydroxyapatite(HA) composites. Further the influence of type of HA on the mechanical properties of the composites was investigated. Phase pure HA was synthesised via a reaction between aqueous solutions of calcium hydroxide and orthophosphoric acid. The powder produced was either used as produced (uncalcined) or calcined in air or calcined in a humidified argon atmosphere...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Daniel W Birch, Jerry T Dang, Noah J Switzer, Namdar Manouchehri, Xinzhe Shi, Ghassan Hadi, Shahzeer Karmali
BACKGROUND: Intraoperative hypothermia during both open and laparoscopic abdominal surgery may be associated with adverse events. For laparoscopic abdominal surgery, the use of heated insufflation systems for establishing pneumoperitoneum has been described to prevent hypothermia. Humidification of the insufflated gas is also possible. Past studies on heated insufflation have shown inconclusive results with regards to maintenance of core temperature and reduction of postoperative pain and recovery times...
October 19, 2016: Cochrane Database of Systematic Reviews
Benny Feng, Patricia Tang, Sharon Shui Yee Leung, Jayesh Dhanani, Hak-Kim Chan
BACKGROUND: Mechanically ventilated patients commonly suffer from ventilator-associated pneumonia, hypoxemia, and other lower respiratory tract infection as a result of pathogen colonization and poor sputum clearance. Consequently, there is a high rate of morbidity and mortality in these patients. Dry powder mannitol increases sputum clearance, and therefore, we developed a system to administer it to mechanically ventilated patients without disconnection from the ventilator. METHODS: The inspiratory line from a ventilator was split by using a three-way valve into two parallel lines where one contains a humidifier for normal breathing cycle and the other line contains a dry powder inhaler (Osmohaler™)...
October 18, 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
Atsushi Kawaguchi, Yutaka Yasui, Allan deCaen, Daniel Garros
OBJECTIVES: To assess the impact on a single PICU of introducing high-flow nasal cannula as a management tool for respiratory distress. DESIGN: Retrospective cohort study, including an interrupted time series analysis with a propensity score adjustment and a matched-pair analysis. SETTING: A single university-affiliated children's hospital PICU. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Differences in clinical outcomes when comparing the pre-high-flow nasal cannula era (2004-2008) and the high-flow nasal cannula era (2010-2014), excluding 2009 as a washout period, and clinical impacts of high-flow nasal cannula as an exposure of interest...
October 12, 2016: Pediatric Critical Care Medicine
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