Dispersible macromolecule compositions and methods for their preparation and use
First Claim
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1. A method for preparing dispersible dry powders of biological macromolecules, said method comprising:
- providing an evaporable liquid medium containing a predetermined concentration of a biological macromolecule having a molecular weight of greater than 2 kD;
atomizing the liquid medium;
drying the droplets in a heated gas stream to produce particles comprising a rugosity of at least 2.0 as measured by air permeametry, a moisture content below 10% by weight and a particle size of less than 10 microns.
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Abstract
A process for preparing ultrafine powders of biological macromolecules comprises atomizing liquid solutions of the macromolecules, drying the droplets formed in the atomization step, and collecting the particles which result from drying. By properly controlling each of the atomization, drying, and collection steps, ultrafine dry powder compositions having characteristics particularly suitable for pulmonary delivery for therapeutic and other purposes may be prepared.
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25 Claims
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1. A method for preparing dispersible dry powders of biological macromolecules, said method comprising:
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providing an evaporable liquid medium containing a predetermined concentration of a biological macromolecule having a molecular weight of greater than 2 kD;
atomizing the liquid medium;
drying the droplets in a heated gas stream to produce particles comprising a rugosity of at least 2.0 as measured by air permeametry, a moisture content below 10% by weight and a particle size of less than 10 microns. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification