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Related Concept Videos

Glassware Calibration01:11

Glassware Calibration

163
Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
163

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Training Intensity Needed for Volume Linearity and Syringe DLCO Check Quality Control.

Ellen A Becker1, Ellen M Moran2, Jason B Blonshine3

  • 1Dr. Becker is affiliated with Rush University Medical Center, Chicago, Illinois, USA.

Respiratory Care
|March 7, 2025
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Summary
This summary is machine-generated.

Pulmonary function equipment quality control (QC) has high failure rates, particularly for volume linearity. Technologists require ongoing training and clear guidelines, not just initial sessions, to ensure accurate patient testing.

Keywords:
DLCO CheckEducationPulmonary Function TestQuality ControlVolume Linearity

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Area of Science:

  • Pulmonary Medicine
  • Medical Diagnostics
  • Quality Control

Background:

  • Accurate pulmonary function testing relies on precise equipment calibration.
  • Technologists must ensure the accuracy and precision of pulmonary function equipment before patient testing.
  • Quality control (QC) failures in spirometry and diffusing capacity testing impact patient care.

Purpose of the Study:

  • Identify failure sources and unacceptable submission rates for spirometry volume linearity and syringe diffusing capacity of the lung for carbon monoxide (DLCO) QC.
  • Explore the impact of time between training and first QC submission on overall unacceptable submission rates.

Main Methods:

  • Cross-sectional global study of 114 laboratories from October 2014 to May 2018.
  • Analysis of 5,083 volume linearity and 4,992 syringe DLCO check QC submissions.
  • Descriptive statistics and Spearman's rho correlation to assess failure rates and training timelines.

Main Results:

  • Unacceptable submission rates were 10% for volume linearity and 6.2% for syringe DLCO.
  • Volume linearity failures were equally split between procedural and equipment issues (5.8% vs. 6.2%).
  • Syringe DLCO failures were predominantly equipment-related (5.9% vs. 0.78%).
  • Early QC failures post-training correlated with higher overall unacceptable rates for both tests (r = -0.41 and r = -0.38).

Conclusions:

  • A single QC training session is insufficient for technologists.
  • Clearer guidelines and expert follow-up are crucial for interpreting QC results and resolving equipment issues.
  • Ongoing support is necessary to maintain in-control testing systems and ensure accurate pulmonary function diagnostics.