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Related Experiment Video

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Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
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Failure modes and effects analysis for ocular brachytherapy.

Yongsook C Lee1, Yongbok Kim1, Jason Wei-Yeong Huynh1

  • 1Department of Radiation Oncology, The University of Arizona, Tucson, AZ.

Brachytherapy
|August 23, 2017
PubMed
Summary
This summary is machine-generated.

This study used failure modes and effects analysis (FMEA) and fault tree analysis (FTA) to improve quality management in Collaborative Ocular Melanoma Study (COMS) brachytherapy, identifying human error as the main failure cause.

Keywords:
Failure modes and effects analysisFault tree analysisOcular brachytherapyQuality assuranceQuality controlQuality management

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Area of Science:

  • Ophthalmology
  • Radiation Oncology
  • Medical Physics
  • Quality Management

Background:

  • Collaborative Ocular Melanoma Study (COMS) ocular brachytherapy is a critical treatment for uveal melanoma.
  • Existing quality management (QM) programs require enhancement to address potential failure modes.
  • Risk assessment is essential for improving patient safety in brachytherapy procedures.

Purpose of the Study:

  • To identify high-risk failure modes (FMs) in COMS ocular brachytherapy.
  • To enhance the current QM program using Failure Modes and Effects Analysis (FMEA) and Fault Tree Analysis (FTA).
  • To reduce risks in clinical practice through proposed QM methods.

Main Methods:

  • Process mapping and FMEA were conducted for COMS ocular brachytherapy.
  • Risk Priority Numbers (RPNs) were calculated for identified FMs based on occurrence, severity, and detectability.
  • Fault Tree Analysis (FTA) was performed on the highest-ranked FM process.

Main Results:

  • 188 potential FMs and 209 causes were identified, with RPNs ranging from 1.0 to 236.1.
  • The plaque assembly process had the highest-ranked FM.
  • Human failure accounted for 85.6% of FMs, with medical physicist-related failures being most common (58.9%).
  • Quality control steps increased from 8 to 15, and quality assurance steps increased from 2 to 4 for key processes after FMEA.
  • Additional QM methods were implemented for the top 10 FMs and 6 FMs with high severity.

Conclusions:

  • Proposed QM methods, including procedure verification, checklists, and ultrasound-guided positioning, aim to reduce high risks.
  • Enhanced quality control and assurance measures are crucial for improving COMS ocular brachytherapy safety.
  • Addressing human and medical physicist-related failures is key to optimizing the QM program.