Abstract:
BACKGROUND:Inhaled alpha1-antitrypsin (AAT) is being developed for treatment of cystic fibrosis to protect the lungs from excessive free elastase. High drug costs mandate a very efficient aerosol system to deliver a high payload to the airways. The I-neb Adaptive Aerosol Delivery (AAD) System is a portable, electronic, vibrating mesh nebulizer that delivers aerosol only during inhalation. It can be operated in conventional tidal breathing mode (TBM) or in target inhalation mode (TIM) that guides the patient to inhale deeply and slowly. The purposes of this in vitro study were to determine aerosol characteristics, device efficiency, and delivery time of AAT using the I-neb AAD System with TBM and TIM. METHODS:We studied the I-neb AAD System in TBM and TIM (inspiratory time 6 or 9 sec) using a breath simulator. The loaded dose was 0.5 mL AAT (50 mg/mL). Nebulized drug captured on an inspiratory filter was reported as emitted dose. Particle size was measured by laser diffraction. Predicted lung doses were calculated based on the results of a prior scintigraphy study of the I-neb AAD System. RESULTS:Particle size (VMD) for TBM and TIM was similar (4.4-4.8 microm). The emitted doses were very high and similar between modes (82-90% of loaded dose). Predicted lung dose of AAT (percent of loaded dose) and delivery times were: TBM 56.6% in 7.5 min; TIM-6 59.9% in 4.4 min; and TIM-9 64.5% in 2.5 min. CONCLUSIONS:The I-neb AAD System enhanced AAT delivery by inhalation-only aerosol generation and a low-residual dose. Predicted lung dose was high for both TBM and TIM, but longer inspiratory times with TIM reduced the administration time to one-third that of tidal breathing. We conclude that slow, deep, controlled inspirations using the I-neb AAD System is an efficient method to deliver AAT.
journal_name
J Aerosol Med Pulm Drug Delivjournal_title
Journal of aerosol medicine and pulmonary drug deliveryauthors
Geller DE,Kesser KCdoi
10.1089/jamp.2009.0793subject
Has Abstractpub_date
2010-04-01 00:00:00pages
S55-9eissn
1941-2711issn
1941-2703journal_volume
23 Suppl 1pub_type
杂志文章abstract:BACKGROUND:The Abbreviated Impactor Measurement (AIM) concept simplifies determination of aerodynamic size metrics for inhaler quality control testing. A similar approach is needed to compare in vitro particle size distribution metrics with human respiratory tract (HRT) deposition. METHODS:An abbreviated impactor base...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2011.0925
更新日期:2012-08-01 00:00:00
abstract:BACKGROUND:Understanding the regional partition of deposition of inhaled particles within the lung is important for improving targeted delivery of inhaled aerosolized drugs. One factor affecting regional deposition is gravity. As the lung deforms under its own weight, changes in lung volume, in airway geometries, and i...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2014.1189
更新日期:2015-12-01 00:00:00
abstract:BACKGROUND:Computer modeling is used to predict inhaled aerosol deposition in the lung based on definition of the aerosol characteristics and the breathing pattern and airway anatomy of the subject. Validation of the models is limited by the lack of detailed experimental data. Three-dimensional imaging provides an oppo...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2014.1191
更新日期:2015-12-01 00:00:00
abstract:BACKGROUND:Researchers, using checklists, have identified that 30%-90% of patients make errors in inhaler use. It is not certain whether these errors affect the delivery of medication. We have developed an electronic monitor (INCA™) that records audio each time an inhaler is used, providing objective information on inh...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2016.1334
更新日期:2017-08-01 00:00:00
abstract:BACKGROUND:Inhaled atropine is being developed as a systemic and pulmonary treatment for the extended recovery period after chemical weapons exposure. We performed a pharmacokinetics study comparing inhaled atropine delivery using the MicroDose Therapeutx Dry Powder Inhaler (DPIA) with intramuscular (IM) atropine deliv...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章,随机对照试验
doi:10.1089/jamp.2011.0948
更新日期:2013-02-01 00:00:00
abstract:PURPOSE:Many methods have been developed to evaluate dry powder inhalation techniques and their efficiency for disease control in asthma patients. However, it is difficult to apply these methods to clinical practice and research. In this study, we introduce a simple new method that can be applied to dry powder inhalati...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2014.1193
更新日期:2016-10-01 00:00:00
abstract:BACKGROUND:The effectiveness of metered-dose inhalers (MDIs) in delivering medication to the lungs highly depends on its correct usage technique. Current guidelines state optimal technique for high lung deposition should include a slow inhalation (>5 seconds) at an inspiratory flow rate of 30 L/min and inhaler actuatio...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2015.1278
更新日期:2017-08-01 00:00:00
abstract::Inhalation is a potentially viable route of administration for numerous agents. In diabetes mellitus, the need for frequent injections to achieve ideal glycemic control remains a significant limitation for initiating and complying with insulin therapy in a large number of patients. To overcome this barrier, inhaled in...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章,评审
doi:10.1089/jamp.2011.0876
更新日期:2011-10-01 00:00:00
abstract:BACKGROUND:Model predictions of regional deposition in the respiratory tract are useful in assessing factors that influence the effectiveness of aerosol delivery. Regional deposition models have previously been coupled with models of mucous production and clearance to estimate initial concentrations of drug deposited i...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2017.1377
更新日期:2018-02-01 00:00:00
abstract:BACKGROUND:To our knowledge, quantification of intranasal deposition of aerosol generated by Accuspray(™) (AS) in children has never been published. We hypothesized that deposition would vary significantly with age and with placement of the device within, or outside, of the nostril. METHODS:We tested these hypotheses ...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2014.1174
更新日期:2015-10-01 00:00:00
abstract:BACKGROUND:Predicting local lung tissue pharmacodynamic (PD) responses of inhaled drugs is a longstanding challenge related to the lack of experimental techniques to determine local free drug concentrations. This has prompted the use of physiologically based pharmacokinetic (PBPK) modeling to potentially predict local ...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2017.1436
更新日期:2019-02-01 00:00:00
abstract:BACKGROUND:Spiromax(®) is a novel dry powder inhaler for patients with asthma or chronic obstructive pulmonary disease (COPD). The studies presented here provide further data on attributes (in vitro dosing consistency with budesonide-formoterol (DuoResp) Spiromax; flow rates through empty versions of the Spiromax and T...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2015.1216
更新日期:2015-10-01 00:00:00
abstract:: Background: The photo reflection method (PRM) is used to measure light reflected from particles released from dry powder inhalers (DPIs). This simple method depicts time trajectories of released drugs; however, it underestimates the number of particles at high peak inhalat...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2020.1610
更新日期:2020-11-04 00:00:00
abstract:: Background: Many countries have introduced a compulsory use of community masks for certain public areas during the SARS-CoV-2 pandemic. Different manufacturers offer reusable community masks in large quantities. The efficacy of these masks, however, is unknown. ...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2020.1635
更新日期:2020-09-23 00:00:00
abstract:BACKGROUND:Use of a valved holding chamber (VHC) in conjunction with a pressurized metered dose inhaler (pMDI) can reduce issues relating to poor actuation-inhalation coordination and potentially improve the lung deposition of aerosol, compared with use of a pMDI alone. However, the performance of a VHC is influenced b...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2013.1067
更新日期:2014-08-01 00:00:00
abstract::Upper respiratory tract infections (URTIs), primarily acute rhinopharyngitis, tonsillitis, adenoiditis, and rhinosinusitis (RS), are major causes of morbidity in both children and adults of any age. In addition to the frequent occurrence of related medical problems and the associated socioeconomic costs, URTIs have a ...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章,评审
doi:10.1089/jamp.2016.1300
更新日期:2017-02-01 00:00:00
abstract:BACKGROUND:Dyspnea significantly impacts quality of life and is one of the most common symptoms in advanced illness. Systemically-administered opioids and benzodiazepines have been the most studied and utilized pharmacologic treatments for refractory dyspnea. Less attention has been given to the use of these medication...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章,评审
doi:10.1089/jamp.2014.1136
更新日期:2015-02-01 00:00:00
abstract:BACKGROUND:Very little is known about the role of nasal morphology due to ethnic variation on particle deposition pattern in the sinonasal cavity. This preliminary study utilizes computational fluid dynamics (CFD) modeling to investigate sinonasal airway morphology and deposition patterns of intranasal sprayed particle...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2014.1205
更新日期:2016-04-01 00:00:00
abstract::Exhaled breath condensate (EBC) consists mainly of water, but also contains semivolatile and nonvolatile compounds. The aim of this study was to develop a system in which two condensers are simultaneously used in series to clarify the mechanisms of EBC condensation. Two aliquots of EBC (EBC1 and EBC2) were collected f...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2007.0644
更新日期:2008-03-01 00:00:00
abstract::Flexhaler is a multiple-dose, inspiratory flow-driven dry powder inhaler that is a newer version of Turbuhaler, and is identical to the Symbicort Turbuhaler. Sustained performance is of the utmost importance to ensure consistent drug delivery throughout the lifespan of the inhaler. We report functionality testing resu...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2008.0700
更新日期:2008-12-01 00:00:00
abstract: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 in...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2016.1320
更新日期:2017-04-01 00:00:00
abstract::The present study aimed at assessing the pharmacokinetics (PK) and safety pharmacodynamics (PD) of 24 microg formoterol delivered via a Novolizer and via an Aerolizer in healthy subjects. This was a randomized, open-label, crossover study. Beside PK, serum potassium, and glucose profiles, vital signs, and ECG were rec...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章,随机对照试验
doi:10.1089/jamp.2008.0690
更新日期:2008-09-01 00:00:00
abstract: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 ob...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2015.1264
更新日期:2016-12-01 00:00:00
abstract:BACKGROUND:The site of deposition in the respiratory tract for aerosolized, inhaled therapeutic drugs depends on both the particles' aerodynamic size and the patient's breathing pattern. METHODS:In 21 healthy subjects with normal lung function, we evaluated an extremely slow inhalation of a large 9.5-μm MMAD particle ...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2008.0711
更新日期:2010-12-01 00:00:00
abstract:BACKGROUND:Small rodents continue to be the mainstay for the assessment of pharmacological and toxicological data of inhaled therapeutics. For meaningful interpretation of the results information about deposition of aerosol particles in the respiratory tract is warranted, but not trivial to obtain for animals with nose...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2011.0902
更新日期:2012-06-01 00:00:00
abstract:BACKGROUND:High flow nasal cannula oxygen therapy (HFT) is increasingly used in intensive and emergency care departments. Patients suffering from respiratory failure, who are likely to benefit from HFT, may require aerosolized bronchodilators; therefore, combining nebulization with HFT may be relevant. This study aimed...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2015.1219
更新日期:2016-04-01 00:00:00
abstract::This article provides a concise review of the use of magnetic resonance imaging (MRI) for measurement of regional aerosol deposition in the lungs. Basic aspects of MRI and its use in lung imaging and measurement of regional ventilation are introduced. Imaging of hydrogen protons (water) and inhaled hyperpolarized gase...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章,评审
doi:10.1089/jamp.2011.0897
更新日期:2012-04-01 00:00:00
abstract::Significant advances have been made in the last 50 years in developing safe and efficacious aerosol formulations for pulmonary delivery. The key to future innovation may lie at the interface between biology and particle engineering. Improved understanding of biological processes including particle clearance, cellular ...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章,评审
doi:10.1089/jamp.2010.0838
更新日期:2010-12-01 00:00:00
abstract:BACKGROUND:Programmed cell death 4 (PDCD4), a protein that binds to eukaryotic initiation factor 4A (eIF4A), inhibits the initiation of translation. Although a number of tumor suppressors target transcription, Pdcd4 is the first suppressor targeting protein translation, and has also been suggested to function as a tumo...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章
doi:10.1089/jamp.2009.0778
更新日期:2010-10-01 00:00:00
abstract::The use of gamma camera imaging following the inhalation of a radiolabel has been widely used by researchers to investigate the fate of inhaled aerosols. The application of two-dimensional (2D) planar gamma scintigraphy and single-photon emission computed tomography (SPECT) to the study of inhaled aerosols is discusse...
journal_title:Journal of aerosol medicine and pulmonary drug delivery
pub_type: 杂志文章,评审
doi:10.1089/jamp.2011.0960
更新日期:2013-06-01 00:00:00