Abstract:
:Substituting spacer by another in noninvasive ventilation (NIV) involves many variables, e.g. total emitted dose (TED), mass median aerodynamic diameter (MMAD), type of spacer, total lung deposition and total systemic absorption, which must be adjusted to ensure patient optimum therapy. Data mining based on artificial neural networks and genetic algorithms were used to model in vitro inhalation process, predict and optimize bioavailability from inhaled doses delivered by metered dose inhaler (MDI) using different spacers in NIV. Modeling of data indicated that in vitro performance of MDI-spacer systems was dependent mainly on fine particle dose (FPD), fine particle fraction (FPF), MMAD and to lesser extent on spacer type. Ex vivo model indicated that amount of salbutamol collected on facemask filter was directly affected by FPF. In vivo model (24hQ) depended directly on spacer type, FPF and TED. Female patients showed higher 0.5hQ and 24hQ values than males. AeroChamber VC spacer demonstrated higher TED and 24hQ in vivo values. Results indicated suitability of MDI-spacer systems in achieving appropriate in vitro inhalation performance. The possibility of modeling and predicting both ex vivo and in vivo capabilities of MDI-spacer systems from knowledge of in vitro attributes enabled detailed focus on important variables required to deliver safe and accurate doses of salbutamol to ventilated patients.
journal_name
Pharm Dev Technoljournal_title
Pharmaceutical development and technologyauthors
Hussein RRS,M A Ali A,Salem HF,Abdelrahman MM,Said ASA,Abdelrahim MEAdoi
10.3109/10837450.2015.1116567subject
Has Abstractpub_date
2017-11-01 00:00:00pages
871-880issue
7eissn
1083-7450issn
1097-9867journal_volume
22pub_type
杂志文章abstract::Taking into account possible irritation of the skin upon contact with naproxen (NPX) crystals and lower bioavailability after administration of the suspended or ionized drug, the aim of the work was to design and characterize novel and easy-to-formulate gels with the entirely dissolved drug in the acidic form. The for...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837450.2015.1135342
更新日期:2017-06-01 00:00:00
abstract::This work aimed to incorporate Dexibuprofen (DXI), the pharmacologically active and more potent form of ibuprofen, into polymeric micelles based tablets with enhanced oral bioavailability. Thin film hydration technique was employed to prepare DXI polymeric micelles using Pluronic® F127 and/or P123 solutions in differe...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837450.2013.823994
更新日期:2014-09-01 00:00:00
abstract::The aim of this study was to investigate isotropic mono- and diglyceride-based (MCMDG) systems, which are potential vehicles for injectable products containing both hydrophilic and lipophilic drugs. For two-component systems, MCMDG was mixed with various masses of water. For three-component systems, the samples were p...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1081/pdt-120027422
更新日期:2004-01-01 00:00:00
abstract::The effect of six factors: spray gun, formulation, inlet temperature, atomizing air pressure, fan air pressure, and gun-bed distance, on the final adhesion of the film coat to the tablet core were assessed. The method used was based on an experimental design, Resolution IV, that allowed the main effects to be free fro...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1081/pdt-49692
更新日期:2005-01-01 00:00:00
abstract:CONTEXT:Bioadhesiviness of polyacrylic acid polymers make them promising hydrogels to design topical drug delivery systems, allowing a close contact with biological substrate as well as an enhanced local concentration gradient, both factors that may improve the biological performance of the drugs. AIM:Texture and bioa...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837450.2014.882941
更新日期:2015-06-01 00:00:00
abstract::Co-solvent solubilization approach has been used to enhance the solubility of seven antidiabetic drugs: gliclazide, glyburide, glipizide, glimepiride, repaglinide, pioglitazone, and roziglitazone. Solubility in water, phosphate buffer (pH 7.4), six co-solvent solutions prepared in water as well as phosphate buffer (pH...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1080/10837450802498894
更新日期:2009-01-01 00:00:00
abstract::The binding mechanism of tablets prepared by single-step granulation/tabletting (SSGT), a novel technique for the production of tablets, was evaluated. SSGT yielded hard tablets having a short disintegration time due to their porous, spongelike internal structure. Calculation of the interaction factor and electrical c...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1081/pdt-65690
更新日期:2005-01-01 00:00:00
abstract:CONTEXT AND OBJECTIVE:The objective of the study was to develop a stable capsule formulation of ziprasidone hydrochloride which can be administered without regards to food intake. MATERIALS AND METHODS:The unstable anhydrous form of ziprasidone hydrochloride was stabilized employing hot-melt extrusion and further opti...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837450.2015.1055764
更新日期:2016-11-01 00:00:00
abstract::There is as yet no commercialized preparation for oral administration of flecainide acetate (FA) to children. In such cases, manipulation of commercial tablets is the usual practice in pharmacy services of hospitals and compounding pharmacies, to provide a suitable dosage form for this vulnerable pediatric population ...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1080/10837450.2016.1238484
更新日期:2018-12-01 00:00:00
abstract::Ternary complexes of meloxicam (ML), a poorly water-soluble anti-inflammatory drug, with β-cyclodextrin (βCD) and polyethylene glycol (PEG) 6000 were prepared from an equimolar (ML-βCD) and 10% of PEG. Characterization of the ternary complex was carried out by differential scanning calorimetry and X-ray diffractometry...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837450.2011.565347
更新日期:2012-09-01 00:00:00
abstract:PURPOSE:The purpose of this study is to investigate the mechanisms and thermodynamics of the interaction between hydroxypropyl beta-cyclodextrin (HPdetaCD) and [D-Trp6, des-Gly10] LHRH ethylamide (deslorelin), a peptide drug. METHODS:We used UV and fluorescence spectroscopy to study the interaction of HPbetaCD and des...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1081/pdt-120000297
更新日期:2001-11-01 00:00:00
abstract::The purpose of this research was to design and develop a novel controlled-release bead formulation for oral administration with buffer crystals as a carrier for loading of fenoldopam mesylate, an intravenous antihypertensive agent, which provides an in vitro release rate of 30-50 mg/hr for 6-8 hr. Buffer crystals were...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837459809028629
更新日期:1998-11-01 00:00:00
abstract::The main objective of the present study was to improve bioavailability of diltiazem hydrochloride and decrease the frequency of dosage form administration by increasing the encapsulation efficiency of the drug, residence time of the dosage form at the site of absorption and sustained release of the drug from the deliv...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1080/10837450802626304
更新日期:2009-01-01 00:00:00
abstract::A redox-responsive docetaxel (DTX) prodrug consisting of a disulfide linkage between DTX and vitamin E (DTX-SS-VE) was synthesized in our laboratory and was successfully formulated into liposomes. The aim of this study was to optimize the formulation and investigate the cellular uptake of DTX prodrug-loaded liposomes ...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1080/10837450.2017.1287728
更新日期:2018-01-01 00:00:00
abstract::The objective of the present work is to investigate the presence or absence of a critical concentration of maize starch according to the percolation theory for a truly ternary system with respect to a minimum disintegration time. The results of this study show that the application of percolation theory is not limited ...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1080/10837450601166494
更新日期:2007-01-01 00:00:00
abstract::Mefenamic acid (MA), a poorly water-soluble drug, was used as a model substance to investigate granules and tablet characteristics to be optimized for the loading volume of MA (0-74.1% v/v) in the formulation including lactose monohydrate/maize starch (7/3) as excipients. The compactibility of granules increased with ...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1080/10837450701702941
更新日期:2008-01-01 00:00:00
abstract::The aim of this study was to prepare electrospun polyvinylpyrrolidone (PVP)/2-hydroxypropyl-β-cyclodextrin (HPβCD) nanofiber mats and to incorporate plai oil (Zingiber Cassumunar Roxb.). The plai oil with 10, 20 and 30% wt to polymer were incorporated in the PVP/HPβCD solution and electrospun to obtain nanofibers. The...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837450.2013.788659
更新日期:2014-06-01 00:00:00
abstract::The utility of microcalorimetry as a rapid screening tool for assessing the solution stability of high molecular weight pharmaceutical proteins was evaluated by using model recombinant antibodies, Protein I and Protein II. Changes in the transition midpoint, T(m), were monitored as a function of pH and/or in the prese...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1080/10837450701212610
更新日期:2007-01-01 00:00:00
abstract::Aqueous concentrated plain mixtures of dextran and concanavalin A (con A) were examined for their rheological response to glucose for comparison with previously studied partially photopolymerized acrylic derivatives. Non-destructive oscillatory tests were undertaken within the linear viscoelastic range to examine the ...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837450903002181
更新日期:2010-01-01 00:00:00
abstract::Mucosa has now been recognized as a potential site for both local and systemic delivery of therapeutics. Mucoadhesive drug delivery systems with customizable release profiles have recently gained considerable interest among formulation scientists to improve clinical outcomes of drugs. This review summarizes the curren...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1080/10837450.2020.1753771
更新日期:2020-09-01 00:00:00
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journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837450.2011.581287
更新日期:2011-11-01 00:00:00
abstract::This study examines the influence of off-bottom clearance on size and size distribution of pellets produced during melt pelletization at different postmelt impeller speeds and binder concentrations using lactose and polyethylene glycol. Melt pelletization of lactose powder 450 M in an 8-liter highshear mixer, the floo...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1080/10837459908984221
更新日期:1999-01-01 00:00:00
abstract::Dynamic image analysis (DIA) was used to measure particle diameter (D50) of in-process samples removed during fluid bed coating. A single, rapid measurement gave D50 to within 4 mum. Samples removed at intervals of 2% weight gain were readily distinguishable by DIA and by their drug release profiles. Drug release was ...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1080/10837450600770072
更新日期:2006-01-01 00:00:00
abstract::Colorectal cancer (CRC) is the third most common cause of cancer-related death in both men and women. Often, surgical intervention remains the choice in treating CRC. Traditional dosage forms used for treating CRC deliver drug to wanted as well as unwanted sites of drug action resulting in several adverse side effects...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章,评审
doi:10.3109/10837450.2012.696268
更新日期:2012-09-01 00:00:00
abstract::The purpose of this study was to assess the usefulness of waxy corn (maize) starch as a cofiller and diluent in pellets produced by aqueous extrusion-spheronization. Waxy corn starch was combined with microcrystalline cellulose (MCC) in the range of 20-50% of the entire composition. Pellets containing ordinary corn st...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1081/pdt-100100521
更新日期:2000-01-01 00:00:00
abstract::This article describes a method to quantitatively track the solvation of HPC in a non-aqueous solvent system during topical gel manufacture. Where visual observation and microscopy could not establish a trend, straight-forward rheological profiling demonstrated a correlation between increased solvation of hydroxypropy...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1080/10837450.2018.1502319
更新日期:2019-04-01 00:00:00
abstract::The contact time of a vehicle on the cornea is of utmost importance for ophthalmic drug delivery. The poor bioavailability and therefore poor therapeutic response exhibited by the conventional ophthalmic solutions due to pre-corneal elimination of a drug may be overcome by the use of the in situ gel forming systems, w...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837450903262033
更新日期:2010-07-01 00:00:00
abstract::The aim of this study was to investigate early formulation screening in small scale with a miniaturized fluid bed device. Altogether eight different batches were granulated in a Multipart Microscale Fluid bed Powder processor (MMFP) with constant process conditions using electrostatic atomization. Atomization voltage ...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837451003739271
更新日期:2011-08-01 00:00:00
abstract::The aim of the present work was to investigate the possibility of achieving buccal delivery of a problematic drug, acyclovir, from films based on chitosan hydrochloride (HCS) and polyacrylic acid sodium salt (PAA). At first, the ionic interaction between HCS and PAA in distilled water was investigated by means of rheo...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.1081/pdt-120018490
更新日期:2003-01-01 00:00:00
abstract::Photon correlation spectroscopy (PCS) is compared with classic rheological measurements using the cone-and-plate technique for the determination of the viscosity of protein solutions. The potential advantages using PCS are small sample volume and fast determination of zero-shear viscosity. The present study assesses p...
journal_title:Pharmaceutical development and technology
pub_type: 杂志文章
doi:10.3109/10837450.2011.649851
更新日期:2013-07-01 00:00:00