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Learning curve for transbronchial lung cryobiopsy in diffuse lung disease.
L M Almeida1, B Lima2, P C Mota3
1Pulmonology Department, Centro Hospitalar de São João, Porto, Portugal.
Revista Portuguesa De Pneumologia
|November 28, 2017
Summary
Proficiency in transbronchial lung cryobiopsy (TBLC) for diagnosing diffuse lung disease is typically achieved around the 70th procedure. This learning curve evaluation shows improved diagnostic yield and sample quality with experience.
Area of Science:
- Pulmonology
- Interventional Pulmonology
- Diagnostic Procedures
Background:
- Transbronchial lung cryobiopsy (TBLC) is an emerging technique for diagnosing diffuse lung diseases (DLD).
- Limited data exist on the learning curve and proficiency thresholds for TBLC.
Purpose of the Study:
- To define the learning curve for TBLC.
- To evaluate diagnostic yield, sample characteristics, and complications.
- To establish a proficiency threshold for TBLC procedures.
Main Methods:
- Retrospective analysis of 100 consecutive TBLC procedures for suspected DLD.
- Comparison of diagnostic yield, sample length/area, and complications between patient groups.
- Logarithm regression analysis to model the learning curve.
Main Results:
- Overall diagnostic yield was 82% with median sample length of 5.4mm and area of 19.5mm².
- Significant improvements in yield (74% vs 90%), length, and area were observed between the first and second 50 procedures.
- The learning curve plateaued around the 70th procedure.
Conclusions:
- Proficiency in TBLC is estimated to be reached after approximately 70 procedures.
- Further validation in larger cohorts is recommended to confirm these findings.
