Freeze-Dried Factor VIII Pellets Uniform Drying
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Solution Overview
Problem
Conventional methods for producing freeze-dried Factor VIII pellets result in variations in activity due to non-uniform heat transfer during freeze-drying, leading to inconsistent product quality and requiring extensive development and validation efforts to ensure uniformity.
Innovation Solution
The method involves freezing droplets of a Factor VIII solution in a temperature-controllable cooling tower and subsequent freeze-drying in a rotating receptacle within a vacuum chamber, eliminating the need for cryogenic gases and ensuring uniform drying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional freeze-drying chambers without temperature controlled walls are used, then the process is simpler and less expensive, but non-uniform heat transfer occurs leading to variation in activity between vials at edges and center
Solution Approach 1:
The patent applies local quality by providing temperature-controlled walls that can be independently controlled at different locations within the freeze-drying chamber. This allows each region (edge and center) to receive appropriate heat transfer conditions, ensuring uniform freezing and drying kinetics across all vial positions while maintaining the simplicity of the overall process.
2Reliability
If a large safety margin is incorporated in the amount of bulk solution filled into final packaging vials, then potency variation is compensated, but yield loss increases due to product stress during freezing, storing, thawing, and freeze-drying
Solution Approach 1:
The patent applies preliminary action by pre-freezing the bulk solution into pellets before final packaging. This preliminary freezing step stabilizes the product structure and reduces subsequent stress during storing, thawing, and freeze-drying, thereby maintaining potency without requiring excessive safety margins and improving overall yield.
3Manufacturing precision
If extensive development and validation work is conducted to ensure uniformity of final product, then product quality is improved, but time and resource consumption increases
Solution Approach 1:
The patent applies self-service by designing a freeze-drying system where temperature-controlled walls automatically maintain uniform thermal conditions throughout the chamber. This self-regulating mechanism ensures consistent freezing and drying kinetics without requiring extensive external development and validation efforts, reducing time and resource consumption while maintaining high product uniformity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces microcollapses, enhances surface homogeneity, and maintains higher specific surface area and potency of the pellets, achieving potencies between 86.2% and 89.9% of the target, while ensuring sterility and improved handling properties.
Implementation Method 1
freezing droplets of a solution comprising factor VIII to form pellets
Implementation Method 2
freeze-drying the pellets
Implementation Method 3
freeze-drying in a rotating receptacle which is housed inside a vacuum chamber
Data Source
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AI summary
A method for the production of freeze-dried pellets comprising factor VIII comprises the steps of: a) freezing droplets of a solution comprising factor VIII to form pellets; b) freeze-drying the pellets; wherein in step a) the droplets are formed by means of droplet formation of the solution comprising factor VIII into a cooling tower which has a temperature-controllable inner wall surface and an interior temperature below the freezing temperature of the solution and wherein in step b) the pellets are freeze-dried in a rotating receptacle which is housed inside a vacuum chamber.