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Journal of Aerosol Medicine and Pulmonary Drug Delivery

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https://www.readbyqxmd.com/read/28075194/aerosol-drug-delivery-during-noninvasive-positive-pressure-ventilation-effects-of-intersubject-variability-and-excipient-enhanced-growth
#1
Ross L Walenga, P Worth Longest, Anubhav Kaviratna, Michael Hindle
BACKGROUND: Nebulized aerosol drug delivery during the administration of noninvasive positive pressure ventilation (NPPV) is commonly implemented. While studies have shown improved patient outcomes for this therapeutic approach, aerosol delivery efficiency is reported to be low with high variability in lung-deposited dose. Excipient enhanced growth (EEG) aerosol delivery is a newly proposed technique that may improve drug delivery efficiency and reduce intersubject aerosol delivery variability when coupled with NPPV...
January 11, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/28075193/workshop-report-aerosol-delivery-to-spontaneously-breathing-tracheostomized-patients
#2
Ariel Berlinski, Arzu Ari, Phil Davies, Jim Fink, Carina Majaesic, Gregory Reychler, Taran Tatla, Israel Amirav
The number of pediatric and adult patients requiring tracheostomy has increased. Many of them require aerosol therapy as part of their treatment. Practitioners have little guidance on how to optimize drug delivery in this population. The following is a report of a workshop dedicated to review the current status of aerosol delivery to spontaneously breathing tracheostomized patients and to provide practice recommendations.
January 11, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/28075184/elucidation-of-formulation-and-delivery-device-related-effects-on-in-vitro-performance-of-nasal-spray-with-implication-to-rational-product-specification-identification
#3
Jernej Grmaš, Katarina Stare, Dane Božič, Rade Injac, Rok Dreu
BACKGROUND: The aim of this work is to use an experimental design approach to identify and study influential formulation and delivery device properties, which can be controlled by final product manufacturer, to establish design space, within which desired in vitro performance can be reached. METHODS: Combining three factors, viscosity of suspension, nozzle orifice diameter (OD), and shot weight (SW), at three levels resulted in D-optimal experimental design with 20 runs...
January 11, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/28075182/dispersing-the-mists-an-experimental-history-of-medicine-study-into-the-quality-of-volatile-inhalations
#4
Barry Murnane, Cathal T Gallagher, Noel Snell, Mark Sanders, Ramin Moshksar, Darragh Murnane
BACKGROUND: Dr. Nelson's Improved Inhaler was first marketed with an advertisement in The Lancet in 1865. Revolutionary at the time for its ease of use and patient-friendliness, the inhaler is still in use for self-treatment by many all over the world. On the occasion of its 150th anniversary, this study reports an experimental historical medicine approach to identify evidence for the quality of vapor inhalers. METHODS: Through accessing reviews of the device's use by the contemporary medical establishment, it was established that Dr...
January 11, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27977321/comparative-study-on-the-size-distributions-respiratory-deposition-and-transport-of-particles-generated-from-commonly-used-medical-nebulizers
#5
Yang Wang, Jiayu Li, Anna Leavey, Caroline O'Neil, Hilary M Babcock, Pratim Biswas
BACKGROUND: Medical nebulizers are widely and conveniently used to deliver medication to the lungs as an inhalable mist; however, the deposition of nebulized particles in the human respiratory system and the transport of the nebulized particles in the environment have not been studied in detail. METHODS: Five medical nebulizers of three different types (constant output, breath enhanced, and dosimetric) were evaluated. The size distribution functions (SDFs) and respiratory deposition of the particles generated from the nebulizers were characterized...
December 15, 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27977318/nebulized-recombinant-human-tissue-factor-pathway-inhibitor-attenuates-coagulation-and-exerts-modest-anti-inflammatory-effects-in-rat-models-of-lung-injury
#6
Florry E van den Boogaard, Jorrit J Hofstra, Xanthe Brands, Marcel M Levi, Joris J T H Roelofs, Sebastiaan A J Zaat, Cornelis Van't Veer, Tom van der Poll, Marcus J Schultz
BACKGROUND: Critically ill patients are at a constant risk of direct (e.g., by pneumonia) or indirect lung injury (e.g., by sepsis). Excessive alveolar fibrin deposition is a prominent feature of lung injury, undermining pulmonary integrity and function. METHODS: We examined the effect of local administration of recombinant human tissue factor pathway inhibitor (rh-TFPI), a natural anticoagulant, in two well-established models of lung injury in rats. Rats received intratracheal instillation of Pseudomonas aeruginosa, causing direct lung injury, or they received an intravenous injection of Escherichia coli lipopolysaccharide (LPS), causing indirect lung injury...
December 15, 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27977309/drug-delivery-in-asthmatic-children-following-coordinated-and-uncoordinated-inhalation-maneuvers-a-randomized-crossover-trial
#7
Ariel Berlinski, Dirk von Hollen, Ross H M Hatley, Lucy E A Hardaker, Kurt Nikander
BACKGROUND: Valved holding chambers (VHCs) are used in children to deliver pressurized metered dose inhalers (pMDI). In vitro data suggest that uncoordinated use decreases the amount of drug available for inhalation. We hypothesize that in an ex vivo study, the coordinated maneuver will deliver more drug than the uncoordinated one. PATIENTS AND METHODS: Thirty-two clinically stable asthmatic children, ages 5-8 years, completed the study. An aerosol filter was interposed between a small-volume nonelectrostatic VHC and a mouthpiece to capture the drug emitted by one puff of Flovent(®) 220 mcg during tidal breathing...
December 15, 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27977306/nasal-and-olfactory-deposition-with-normal-and-bidirectional-intranasal-delivery-techniques-in-vitro-tests-and-numerical-simulations
#8
Jinxiang Xi, Zhaoxuan Wang, Danielle Nevorski, Thomas White, Yue Zhou
BACKGROUND: Intranasal delivery protocols that can effectively deposit drugs to the olfactory region are severely lacking. Furthermore, it is still challenging to quantify nasal deposition on a regional or local basis, which is crucial in assessing the performance of targeted olfactory drug delivery. OBJECTIVES: To visually and quantitatively compare drug depositions in the nose and olfactory region with normal and bidirectional breathing patterns with vibrating mesh and jet nebulizers...
December 15, 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27849432/monitoring-the-inhalation-flow-rate-of-nebulized-aerosols-using-an-ultrasonic-flow-meter-in-vitro-assessment
#9
Michael Y Yang, Hak-Kim Chan
BACKGROUND: The measurement of aerosol flow rates without obscuration of the flow is of particular concern with in vivo lung deposition studies, where precise knowledge of aerosol particle size distributions is a necessary requirement for the development of predictive correlations. This study examines the utility of an ultrasonic flow meter for such measurements and determines if a valved system can be attached to the flow meter for sampling exhaled aerosols. METHODS: The flow rate across a D-30 flow meter was compared with and without nebulization of 0...
November 16, 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27792477/suppression-of-tobacco-carcinogen-induced-lung-tumorigenesis-by-aerosol-delivered-glycerol-propoxylate-triacrylate-spermine-copolymer-short-hairpin-rab25-rna-complexes-in-female-a-j-mice
#10
Nomundelger Gankhuyag, Kyeong Nam Yu, Orkhonselenge Davaadamdin, Somin Lee, Won Young Cho, Changhoon Park, Hu-Lin Jiang, Bijay Singh, Chan-Hee Chae, Myung-Haing Cho, Chong-Su Cho
BACKGROUND: Rab25, a member of Rab family of small guanosine triphosphatase, is associated with progression of various types of human cancers, including lung cancer, the leading cause of cancer-associated deaths around the globe. METHODS: In this study, we report the gene therapeutic effect of short hairpin Rab25 RNA (shRab25) on 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK)-induced lung tumorigenesis in female A/J mice. Initially, mice (6 weeks old) were injected with single dose of NNK (2 mg/0...
October 28, 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27504720/characterization-of-medication-velocity-and-size-distribution-from-pressurized-metered-dose-inhalers-by-phase-doppler-anemometry
#11
Abubaker Alatrash, Edgar Matida
BACKGROUND: Particle size and velocity are two of the most significant factors that impact the deposition of pressurized metered-dose inhaler (pMDI) sprays in the mouth cavity. pMDIs are prominently used around the world in the treatment of patients suffering from a variety of lung diseases such as asthma and chronic obstructive pulmonary disease. Since their introduction in the field, and as a result of their effectiveness and simplicity of usage, pMDIs are considered to be the most widely prescribed medical aerosol delivery system...
December 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27224033/nonuniform-deposition-of-pressurized-metered-dose-aerosol-in-spacer-devices
#12
Nicholas Ogrodnik, Victor Azzi, Elizabeth Sprigge, Sandra Fiset, Edgar Matida
BACKGROUND: Pressurized metered-dose inhalers (pMDIs) are commonly used to administer medication to patients suffering from chronic lower respiratory tract diseases such as asthma. Inhaling medication directly from a pMDI can prove difficult for some patients and, as a result, add-on devices (or spacers) have been designed to aid in the delivery of medication. Although spacers increase the percentage of medication that reaches the patient, medication will also nonsymmetrically deposit on the walls of the device and will be lost to the device itself...
December 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27186789/atomized-human-amniotic-mesenchymal-stromal-cells-for-direct-delivery-to-the-airway-for-treatment-of-lung-injury
#13
Sally Yunsun Kim, Janette K Burgess, Yiwei Wang, Eleanor P W Kable, Daniel J Weiss, Hak-Kim Chan, Wojciech Chrzanowski
BACKGROUND: Current treatment regimens for inhalation injury are mainly supportive and rely on self-regeneration processes for recovery. Cell therapy with mesenchymal stromal cells (MSCs) is increasingly being investigated for the treatment of inhalation injury. Human amniotic MSCs (hAMSCs) were used in this study due to their potential use in inflammatory and fibrotic conditions of the lung. This study aimed at demonstrating that hAMSCs can be atomized with high viability, for the purpose of achieving a more uniform distribution of cells throughout the lung...
December 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27149365/pilot-randomized-controlled-trial-evaluating-the-effect-of-hypertonic-saline-with-and-without-hyaluronic-acid-in-reducing-inflammation-in-cystic-fibrosis
#14
Anna Brivio, Massimo Conese, Simone Gambazza, Arianna Biffi, Amedea Silvia Tirelli, Maria Russo, Michaela Foà, Carla Colombo
BACKGROUND: Hypertonic saline (HS) has been established as a therapy aimed at restoring the surface liquid of airways liquid and enhancing mucociliary clearance in patients with cystic fibrosis (CF). A formula containing 7% HS and 0.1% hyaluronic acid (HA) is also available, basing its use on the protective effects of HA against elastin injury and on its greater ease of administration (i.e., the perceived acceptability of inhalation). This study explores the effect of HA+HS in reducing the inflammation of airways, by measuring cytokine levels in sputum, its safety profile, and the prevalence of commonly reported symptoms like cough, throat irritation, and saltiness...
December 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27082824/validating-whole-airway-cfd-predictions-of-dpi-aerosol-deposition-at-multiple-flow-rates
#15
P Worth Longest, Geng Tian, Navvab Khajeh-Hosseini-Dalasm, Michael Hindle
BACKGROUND: The objective of this study was to compare aerosol deposition predictions of a new whole-airway CFD model with available in vivo data for a dry powder inhaler (DPI) considered across multiple inhalation waveforms, which affect both the particle size distribution (PSD) and particle deposition. METHODS: The Novolizer DPI with a budesonide formulation was selected based on the availability of 2D gamma scintigraphy data in humans for three different well-defined inhalation waveforms...
December 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27754730/a-novel-in-line-delivery-system-to-administer-dry-powder-mannitol-to-mechanically-ventilated-patients
#16
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
https://www.readbyqxmd.com/read/27748638/the-history-of-therapeutic-aerosols-a-chronological-review
#17
Stephen W Stein, Charles G Thiel
In 1956, Riker Laboratories, Inc., (now 3 M Drug Delivery Systems) introduced the first pressurized metered dose inhaler (MDI). In many respects, the introduction of the MDI marked the beginning of the modern pharmaceutical aerosol industry. The MDI was the first truly portable and convenient inhaler that effectively delivered drug to the lung and quickly gained widespread acceptance. Since 1956, the pharmaceutical aerosol industry has experienced dramatic growth. The signing of the Montreal Protocol in 1987 led to a surge in innovation that resulted in the diversification of inhaler technologies with significantly enhanced delivery efficiency, including modern MDIs, dry powder inhalers, and nebulizer systems...
October 17, 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27740878/predicting-exposure-after-oral-inhalation-of-the-selective-glucocorticoid-receptor-modulator-azd5423-based-on-dose-deposition-pattern-and-mechanistic-modeling-of-pulmonary-disposition
#18
Per Bäckman, Ulrika Tehler, Bo Olsson
BACKGROUND: Exposure following oral inhalation depends on the deposition pattern of the inhaled aerosol, the extent and rate of oral and pulmonary absorption, as well as systemic distribution and clearance. For lipophilic inhaled compounds with low water solubility and high permeability, the extent and rate of pulmonary absorption can be assumed dependent on deposition pattern as well as dissolution rate. MATERIALS AND METHODS: A mechanistic model of airway deposition, mucociliary clearance, dissolution, absorption, and dissipation was applied to simulate systemic exposure of the novel selective glucocorticoid receptor modulator, AZD5423, when dosed to healthy volunteers using two different nebulizers and two different dry powder inhalers in combination with two different primary particle size distributions...
October 14, 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/26859538/pharmacodynamics-and-pharmacokinetics-following-once-daily-and-twice-daily-dosing-of-tiotropium-respimat-%C3%A2-in-asthma-using-standardized-sample-contamination-avoidance
#19
Kai-Michael Beeh, Anne-Marie Kirsten, Daniel Dusser, Ashish Sharma, Piet Cornelissen, Ralf Sigmund, Petra Moroni-Zentgraf, Ronald Dahl
BACKGROUND: This study was conducted to confirm the 24-hour bronchodilator efficacy and pharmacokinetic profile of once-daily tiotropium Respimat(®) 5 μg add-on to inhaled corticosteroids (ICS) in adults with symptomatic asthma. It used a trial protocol designed to minimize the risk of pharmacokinetic sample contamination resulting from improper sampling procedure, sample handling, or device handling during priming and subsequent inhalation procedure. METHODS: A Phase II, randomized, double-blind, two-way crossover study (NCT01696071) comparing two daily dosing regimens of tiotropium for 4 weeks, once-daily 5 μg (evening dosing) or twice-daily 2...
October 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/27676193/inhaler-technique-in-asthma-how-does-it-relate-to-patients-preferences-and-attitudes-toward-their-inhalers
#20
Lia Jahedi, Sue R Downie, Bandana Saini, Hak-Kim Chan, Sinthia Bosnic-Anticevich
BACKGROUND: Correct inhaler technique can increase medication efficacy, reducing both dose and side effects. Patient preference for inhaler device has not been fully explored, and we hypothesized that if patients have a preference and can choose their inhaler, they might be more likely to use it correctly. Our aim was to determine the preferences, attitudes, and perceptions of patients with asthma toward their inhalers, and to evaluate whether any of these factors were related to inhalation technique...
September 27, 2016: Journal of Aerosol Medicine and Pulmonary Drug Delivery
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