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  1. Home
  3. Using Positive Controls To Define The Defect Detection Range For Ccit Method Development And Validation.
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  3. Using Positive Controls To Define The Defect Detection Range For Ccit Method Development And Validation.

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Using Positive Controls to Define the Defect Detection Range for CCIT Method Development and Validation.

Ken Victor1, Allison Alix Caudill1, Peter Grant2

  • 1Lighthouse Instruments, LLC. Charlottesville, VA 22902, USA.

PDA Journal of Pharmaceutical Science and Technology
|June 19, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

This study introduces a theoretical framework for container closure integrity testing (CCIT) and demonstrates using microcapillaries to create smaller defects. It reveals how liquid fills affect defect size measurements in pharmaceutical packaging.

Keywords:
Laser-drilled DefectsMethod DevelopmentMethod ValidationMicrocapillary DefectsPositive ControlsQuality by DesignType Controlscontainer closure integrity

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Area of Science:

  • Pharmaceutical Science
  • Packaging Engineering
  • Quality Control

Background:

  • The pharmaceutical industry increasingly uses Quality by Design (QbD) for parenteral products.
  • Developing robust Container Closure Integrity Test (CCIT) methods is crucial for ensuring package integrity and product safety.
  • CCIT method validation requires well-defined positive and negative controls mimicking production samples.

Purpose of the Study:

  • To establish a theoretical framework linking flow-effective size to gas flow rates in defects.
  • To demonstrate the use of microcapillaries for creating defects smaller than 2 μm.
  • To investigate the impact of liquid fills on the flow-effective size of laser-drilled defects in glass vials.

Main Methods:

  • Theoretical modeling of gas flow through defects.
  • Fabrication of micro-defects using microcapillaries.
  • Assessment of laser-drilled defects (5 and 10 μm) in glass vials under submerged conditions.

    • Main Results:

    • A theoretical framework was developed to correlate flow-effective size with gas flow rates.
    • Microcapillaries enabled the creation of defects with flow-effective sizes significantly smaller than previously achievable.
    • The flow-effective size of laser-drilled defects decreased substantially when vials were filled with filtered water.

    Conclusions:

    • The study provides a theoretical basis for CCIT defect characterization.
    • Microcapillary technology offers enhanced precision for creating small defects in CCIT studies.
    • Liquid submersion significantly influences the measured flow-effective size of defects, impacting CCIT method accuracy.