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liquid ventilation

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https://www.readbyqxmd.com/read/28813621/improvement-of-an-in-vitro-model-to-assess-delivered-dose-and-particle-size-for-a-vibrating-mesh-nebulizer-during-mechanical-ventilation
#1
Nani Kadrichu, Derek Daniher
BACKGROUND: In an in vitro model of mechanical ventilation with gravity-dependent filter position we observed artificially high delivered doses resulting from liquid droplet collection and precipitation of aerosolized drug. We sequentially modified the model to obtain accurate reproducible measurements of delivered dose and particle size at endotracheal tube exit. METHODS: Stepwise changes in the model included (1) altering the endotracheal tube position to a gravity-independent position, (2) adding fluid traps, (3) humidifying air near the test lung, and (4) simplifying test lung and filters...
August 16, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/28775070/elevated-airway-liquid-volumes-at-birth-a-potential-cause-of-transient-tachypnea-of-the-newborn
#2
Erin Victoria McGillick, Katie Lee, Shigeo Yamaoka, Arjan B Te Pas, Kelly J Crossley, Megan J Wallace, Marcus John Kitchen, Robert A Lewis, Lauren T Kerr, Philip DeKoninck, Janneke Dekker, Marta Thio, Annie McDougall, Stuart B Hooper
Excessive liquid in airways and/or in distal lung tissue may underpin the respiratory morbidity associated with transient tachypnea of the newborn (TTN). However, its effects on lung aeration and respiratory function following birth are unknown. We investigated the effect of elevated airway liquid volumes on newborn respiratory function. Near term rabbit kittens (30 days gestation; term ~32 days) were delivered, had lung liquid drained and either had no liquid replaced (Control, n=7) or 30 mL/kg of liquid was re-added to the airways (liquid added; LA, n=7)...
August 3, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28768120/investigation-of-lung-pharmacokinetic-of-the-novel-pde4-inhibitor-chf6001-in-preclinical-models-evaluation-of-the-preciseinhale-technology
#3
Alessandro Fioni, Ewa Selg, Valentina Cenacchi, Fernando Acevedo, Giandomenico Brogin, Per Gerde, Paola Puccini
BACKGROUND: Preclinical evaluation of new chemical entities (NCEs) designed to be administered by inhalation route requires lung administration to rodents, especially in the discovery phase. Different administration methods have been used until now, but more efforts are required to obtain controlled and reproducible lung deposition when only small amounts of neat powder material are available. METHODS: The PreciseInhale platform used in the present study enables well-controlled powder aerosol exposures with only small amounts of micronized neat material, providing data on inhalation pharmacokinetic (PK) of NCEs at a very early stage...
August 2, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/28757912/lung-protective-ventilation-strategies-for-relief-from-ventilator-associated-lung-injury-in-patients-undergoing-craniotomy-a-bicenter-randomized-parallel-and-controlled-trial
#4
Chaoliang Tang, Juan Li, Shaoqing Lei, Bo Zhao, Zhetao Zhang, Wenting Huang, Si Shi, Xiaoqing Chai, Chaoshi Niu, Zhongyuan Xia
Current evidence indicates that conventional mechanical ventilation often leads to lung inflammatory response and oxidative stress, while lung-protective ventilation (LPV) minimizes the risk of ventilator-associated lung injury (VALI). This study evaluated the effects of LPV on relief of pulmonary injury, inflammatory response, and oxidative stress among patients undergoing craniotomy. Sixty patients undergoing craniotomy received either conventional mechanical (12 mL/kg tidal volume [VT] and 0 cm H2O positive end-expiratory pressure [PEEP]; CV group) or protective lung (6 mL/kg VT and 10 cm H2O PEEP; PV group) ventilation...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28670327/asthma-pressurised-metered-dose-inhaler-performance-propellant-effect-studies-in-delivery-systems
#5
William F S Sellers
BACKGROUND: Current pressurised metered dose asthma inhaler (pMDI) propellants are not inert pharmacologically as were previous chlorofluorocarbons, have smooth muscle relaxant' partial pressure effects in the lungs and inhaled hydrofluoroalkane 134a (norflurane) has anaesthetic effects. Volumes of propellant gas per actuation have never been measured. METHODS: In-vitro studies measured gas volumes produced by pMDIs on air oxygen (O2) levels in valved holding chambers (VHC) and the falls in O2% following actuation into lung ventilator delivery devices...
2017: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/28668915/mechanical-ventilation-and-cytopathological-changes-in-the-oral-mucosa
#6
Ana Carolina Machado Landgraf, Angélica Reinheimer, Júlio Cezar Merlin, Soraya de Azambuja Berti Couto, Paulo Henrique Couto Souza
BACKGROUND: The oral mucosa is an important defense barrier to penetration of microorganisms. Thus, changes in the oral epithelium might indicate risk for infection in intensive care patients receiving mechanical ventilation. OBJECTIVE: To evaluate the oral mucosa of intensive care patients who did or did not receive mechanical ventilation by using liquid-base exfoliative cytology. METHODS: The sample consisted of 3 groups: 27 patients admitted to intensive care during a 7- to 14-day period who received mechanical ventilation, 29 patients admitted during the same period who did not receive mechanical ventilation, and 27 healthy patients who had no lesions in the mouth...
July 2017: American Journal of Critical Care: An Official Publication, American Association of Critical-Care Nurses
https://www.readbyqxmd.com/read/28656710/effect-of-liquid-properties-on-swallowing-and-ventilation-coordination-in-rats
#7
A C Desombres, C Duclos, I Ghannouchi, J P Marie, E Verin
BACKGROUND: One aspect of rehabilitation in swallowing disorders is to change liquid properties. The objective of our study was to test how liquid properties could improve oropharyngeal dysphagia and swallowing and ventilation coordination in an animal model. METHODS: Forty-two healthy male rats were distributed in six groups, including a control group. Rats were deprived of water for 24 h and then each group was administered liquid with different properties: tap water, sugar water, sparkling water, salt water, cold water, and acidic water...
June 28, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28625548/effect-of-a-change-in-housing-conditions-on-body-weight-behavior-and-brain-neurotransmitters-in-male-c57bl-6j-mice
#8
Noemi Pasquarelli, Patrizia Voehringer, Julia Henke, Boris Ferger
The development of modern housing regimes such as individually ventilated cage (IVC) systems has become very popular and attractive in order to reduce spreading of pathogenic organisms and to lower the risk to develop a laboratory animal allergy for staff members. Additionally, optimal housing of laboratory animals contributes to improve animal health status and ensures high and comparable experimental and animal welfare standards. However, it has not been clearly elucidated whether 1) a change to IVC systems have an impact on various physiological phenotypic parameters of mice when compared to conventional, standard cages and 2) if this is further affected by changing from social to single housing...
June 15, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28625234/-effect-of-global-end-diastolic-volume-index-guidance-fluid-resuscitation-in-elderly-patients-with-septic-shock
#9
Shuang Ma, Rumin Zhang, Shifu Wang, Meiling Zhao, Lei Wang, Yun Zhang
OBJECTIVE: To evaluate the effect of global end diastolic volume index (GEDVI) on fluid resuscitation in elderly patients with septic shock. METHODS: A prospective randomized controlled trial (RCT) was conducted. Septic shock patients over 65 years admitted to intensive care unit (ICU) of Shandong Province, Zibo Central Hospital from January 2013 to December 2015 were enrolled. The patients were randomly divided into control group and observation group, 20 cases in each group...
June 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28522773/severe-neurological-symptoms-following-synthetic-cannabinoid-intoxication
#10
F van Gorp, L C Wejden, N A Stienstra, E M Kuck, L E M Haas
Synthetic cannabinoids are becoming increasingly popular as substances of abuse. However, in the Netherlands synthetic cannabinoid intoxications are rare. We report a 16-year-old male who became deeply comatose and was admitted to the intensive care unit for invasive mechanical ventilation after a buse of aninitially unknown drug. Routine toxicology screening with an immunoassay only detected tetrahydrocannabinol, but additional tests with liquid chromatography mass spectrometry revealed synthetic cannabinoid use...
May 2017: Netherlands Journal of Medicine
https://www.readbyqxmd.com/read/28518006/cooling-effects-of-wearer-controlled-vaporization-for-extravehicular-activity
#11
Kunihiko Tanaka, Daiki Nagao, Kosuke Okada, Koji Nakamura
INTRODUCTION: The extravehicular activity suit currently used by the United States in space includes a liquid cooling and ventilation garment (LCVG) that controls thermal conditions. Previously, we demonstrated that self-perspiration for evaporative cooling (SPEC) garment effectively lowers skin temperature without raising humidity in the garment. However, the cooling effect is delayed until a sufficient dose of water permeates and evaporates. In the present study, we hypothesized that wearer-controlled vaporization improves the cooling effect...
April 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28510235/surfactants-in-acute-respiratory-distress-syndrome-in-infants-and-children-past-present-and-future
#12
REVIEW
Angela Amigoni, Andrea Pettenazzo, Valentina Stritoni, Maria Circelli
There is a lack of definitive data on the effective management of acute respiratory distress syndrome (ARDS) in infants and children. The development and validation of the Berlin definition (BD) for ARDS and the Pediatric Acute Lung Injury Consensus Conference (PALICC) recommendations in children represented a major advance in optimizing research and treatment, mainly due to the introduction of a severe ARDS category. Proposed reasons for the lack of consistent results with surfactants in children and infants compared with neonates include different causes, type of lung damage (direct or indirect), timing and mode of administration as well as the type of surfactant used...
August 2017: Clinical Drug Investigation
https://www.readbyqxmd.com/read/28501768/association-between-chinese-cooking-oil-fumes-and-sleep-quality-among-a-middle-aged-chinese-population
#13
Fu Wei, Guanghui Nie, Bo Zhou, Liang Wang, Yifei Ma, Suwan Peng, Songfeng Ou, Jian Qin, Li'e Zhang, Shu Li, Ruosi Zou, Xiaoyun Zeng, Zhiyong Zhang, Yunfeng Zou
Poor sleep quality is an important symptom of many medical or psychiatric disorders. However, the impact of cooking oil fumes (COFs) on sleep quality has not been studied. This population-based cross-sectional study was conducted to examine the association between COFs of Chinese household cooking and sleep quality. Individual sleep quality assessment was completed in 2197 participants with an average age of 37.52 years, through Pittsburgh Sleep Quality Index (PSQI). Information about their cooking practice were also collected by self-reported questionnaire...
August 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28494178/suicide-attempt-with-self-made-taxus-baccata-leaf-capsules-survival-following-the-application-of-extracorporeal-membrane-oxygenation-for-ventricular-arrythmia-and-refractory-cardiogenic-shock
#14
Fanny Vardon Bounes, Elsa Tardif, Stéphanie Ruiz, Jean-Christophe Gallart, Jean-Marie Conil, Clément Delmas
CONTEXT: Yew intoxication has been known for many years; high dose ingestion of Taxus baccata leads to cardiac toxicity mediated by calcium and sodium channel blocking properties. We present a case report of a patient who attempted suicide after T. baccata ingestion, causing refractory cardiogenic shock requiring temporary circulatory assistance by veno-arterial extra corporeal membrane oxygenation (VA ECMO). CASE DETAILS: A 28-year-old man was admitted to the critical care unit of a university hospital for arrhythmia after ingestion of self-made T...
September 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28459413/-advance-on-human-umbilical-cord-mesenchymal-stem-cells-for-treatment-of-ali-in-severe-burns
#15
Yu Wang, Xiaohong Hu
Severe burn is often accompanied by multiple organ damage. Acute lung injury (ALI) is one of the most common complications, and often occurs in the early stage of severe burns. If it is not treated in time, it will progress to acute respiratory distress syndrome (ARDS), which will be a serious threat to the lives of patients. At present, the treatment of ALI in patients with severe burn is still remained in some common ways, such as the liquid resuscitation, the primary wound treatment, ventilation support, and anti-infection...
January 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28441181/inhaled-treprostinil-drug-delivery-during-mechanical-ventilation-and-spontaneous-breathing-using-two-different-nebulizers
#16
Donna K Parker, Shuijie Shen, Jiang Zheng, D Dunbar Ivy, Dave N Crotwell, Justin C Hotz, Robert M DiBlasi
OBJECTIVES: To determine the feasibility of delivering inhaled treprostinil during mechanical ventilation and spontaneous unassisted ventilation using the Tyvaso Inhalation System and the vibrating mesh nebulizer. We sought to compare differences in fine particle fraction, and absolute inhaled treprostinil mass delivered to neonatal, pediatric, and adult models affixed with a face mask, conventional, and high-frequency ventilation between Tyvaso Inhalation System and with different nebulizer locations between Tyvaso Inhalation System and vibrating mesh nebulizer...
June 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28440522/-nutrition-management-in-obese-patients-with-type-2-diabetes-mellitus-after-laparoscopic-sleeve-gastrectomy
#17
Weihong Tang, Yuhua Chen, Meizhen Pan, Lihua Chen, Lele Zhang, Tingfeng Wang, Xiong Zhang, Peng Zhang, Chengzhu Zheng, Bo Yu
OBJECTIVE: To explore the value of nutrition management in obese patients with type 2 diabetes mellitus(T2DM) after laparoscopic sleeve gastrectomy(LSG). METHODS: Clinical data of 22 obese T2DM patients undergoing LSG from March 2013 to July 2015 in Fudan University Pudong Medical Center were collected. All the patients strictly followed the specialized instruction by nutritionists: diabetic and low calorie diet 3347.2 to 5020.8 kJ (800 to 1200 kcal) per day before the operation; low calorie liquid diet 2510...
April 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28405460/provision-of-straw-by-a-foraging-tower-effect-on-tail-biting-in-weaners-and-fattening-pigs
#18
Carolin Holling, Elisabeth Grosse Beilage, Beatriz Vidondo, Christina Nathues
BACKGROUND: Straw is one of the most effective rooting materials to reduce tail biting in pigs. A so-called foraging-tower (FT) provides only small quantities of straw compatible with liquid manure systems. The focus of the present study was on the effect of providing straw by FT in order to prevent tail biting in tail docked pigs. Four consecutive batches of 160 pigs, randomly divided into a straw (SG) and a control group (CG) were followed up from weaning to slaughter. RESULTS: Tail wounds (Score ≥ 2) were detected in 104 out of 12,032 single observations (SG n = 48; CG n = 56) in 9 pens (SG n = 4/32; CG n = 5/32) mainly focused on the fattening period of batch 2 due to a failure in the ventilation system...
2017: Porcine Health Management
https://www.readbyqxmd.com/read/28278179/manufacture-of-low-benzo-a-pyrene-sesame-seed-sesamum-indicum-l-oil-using-a-self-designed-apparatus
#19
Ji Yoon Yi, Hui Ju Kim, Myong-Soo Chung
The aim of this study was to lower benzo(a)pyrene (BaP) contents in sesame seed oil (SSO) during manufacture by using a self-designed apparatus, to determine its optimal conditions, and to analyze antioxidants in SSO which might be related to BaP content reduction. Washing and spin-drying steps reduce exogenous BaP contamination, and the reduced moisture in seeds lowered BaP content in final SSO. A ventilation system in the roasting step inhibits BaP formation and reabsorption, followed by a controlled compression step...
2017: PloS One
https://www.readbyqxmd.com/read/28268879/optimal-control-of-inspired-perfluorocarbon-temperature-for-induction-of-hypothermia-by-total-liquid-ventilation-in-juvenile-lamb-model
#20
Mathieu Nadeau, Michael Sage, Jean-Paul Praud, Renaud Tissier, Herve Walti, Philippe Micheau
Mild hypothermia is well known for its therapeutic value in cardio- and neuroprotection. Many recent experimental studies have shown that the swiftness of the cooling offered by total liquid ventilation (TLV) holds great promise in achieving maximal therapeutic effect. TLV is an emerging ventilation technique in which the lungs are filled with breathable liquids, namely perfluorocarbons (PFCs). A liquid ventilator ensures subject ventilation by periodically renewing a volume of oxygenated, CO2-free and temperature-controlled breathable PFC...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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