共 50 条
Influence of Peak Inspiratory Flow Rates and Pressure Drops on Inhalation Performance of Dry Powder Inhalers
被引:16
|作者:
Hira, Daiki
[1
]
Okuda, Tomoyuki
[1
]
Ichihashi, Mika
[1
]
Mizutani, Ayano
[1
]
Ishizeki, Kazunori
[2
]
Okada, Toyoko
[2
]
Okamoto, Hirokazu
[1
]
机构:
[1] Meijo Univ, Fac Pharm, Tempaku Ku, Nagoya, Aichi 4688503, Japan
[2] Hitachi Automot Syst Ltd, Gunma 3720023, Japan
关键词:
dry powder inhaler;
inhalation device;
inspiratory flow rate;
human inspiratory flow simulator;
powder formulation;
STANDARDIZED ENTRAINMENT TUBES;
COMPUTATIONAL FLUID-DYNAMICS;
IN-VITRO;
DRUG-DELIVERY;
LACTOSE;
FORMULATION;
DESIGN;
BLENDS;
MONOHYDRATE;
RESISTANCE;
D O I:
10.1248/cpb.60.341
中图分类号:
R914 [药物化学];
学科分类号:
100701 ;
摘要:
The aim of this study was to reveal the relationship between human inspiratory flow patterns and the concomitant drops in pressure in different inhalation devices, and the influence of the devices on inhalation performance. As a model formulation for inhalers, a physically mixed dry powder composed of salbutamol sulfate and coarse lactose monohydrate was selected. The drops in pressure at 28.3 L/min of three inhalation devices, Single-type, Dual-type, and Reverse-type, was 1.0, 5.1, and 8.7 kPa, respectively. Measurements of human inspiratory patterns revealed that although the least resistant device (Single) had large inter- and intra-individual variation of peak flow rate (PFR), the coefficients of variation of PFR of the three devices were almost the same. In tests with a human inspiratory flow simulator in vitro, inhalation performance was higher, but the variation in inhalation performance in the range of human flow patterns was wider, for the more resistant device. To minimize the intra- and inter-individual variation in inhalation performance for the model formulation in this study, a formulation design that allows active pharmaceutical ingredient to detach from the carrier with a lower inhalation flow rate is needed.
引用
收藏
页码:341 / 347
页数:7
相关论文