Dry powder inhalation system for transpulmonary administration

Details Dry powder inhalation system for transpulmonary administration Dry powder inhalation system for transpulmonary administration

2003-12-12

2010-06-15

Richter, Johann R (Department: 1616)

Surgery

Respiratory method or device

Combined with or convertible to a nonrespiratory device, or...

C424S489000, C424S046000, C514S002600

Reexamination Certificate

active

07735485

ABSTRACT:
A dry powder inhalation system suitable for transpulmonary administration. The dry powder inhalation system is characterized by using a combination of:(1) a vessel housing a freeze-dried composition prepared by freeze-drying a composition liquid containing ingredients in a non-dissolved form, and has:(i) a non-powder cake-like form,(ii) a disintegration index of 0.05 or more, and(iii) a property of becoming fine particles having a mean particle diameter (mass median aerodynamic diameter) of 10 microns or less or a fine particle fraction of 10% or more upon receipt of an air impact having an air speed of at least 1 m/sec and an air flow rate of at least 17 ml/sec; and(2) a device comprising a member capable of applying the air impact to the freeze-dried composition in said vessel, and a member for discharging the powder-form freeze-dried composition that has been made into fine particles.

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