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Transbronchial needle aspirates: how many passes per target site?
A H Diacon1, M M Schuurmans, J Theron
1Department of Internal Medicine, Tygerberg Academic Hospital, University of Stellenbosch, Cape Town, South Africa. ahd@sun.ac.za
The European Respiratory Journal
|September 29, 2006
Summary
Serial needle passes in transbronchial needle aspiration significantly increase diagnostic yield. Three passes are sufficient for tissue diagnosis, but four to five are recommended for lung cancer staging.
Area of Science:
- Pulmonology
- Interventional Pulmonology
- Diagnostic Bronchoscopy
Background:
- Transbronchial needle aspiration (TBNA) is a key bronchoscopic technique for diagnosing lung conditions.
- The optimal number of needle passes for maximizing diagnostic yield remains debated.
Purpose of the Study:
- To evaluate the impact of serial needle passes on the diagnostic yield of TBNA.
- To determine the appropriate number of passes for different clinical scenarios.
Main Methods:
- Prospective recording of 1,562 needle passes across 374 target sites in 245 patients.
- Analysis of diagnostic yield based on the number of passes and target site characteristics.
Main Results:
- Positive aspirates were obtained in 75% of patients and 68% of target sites.
- Diagnostic yield increased progressively with serial passes: 64% (1st pass), 87% (2nd), 95% (3rd), and 98% (4th).
- Stepwise yield increments were consistent across various target sites.
Conclusions:
- Three TBNA passes per site are adequate when alternative diagnostic options exist.
- Four to five passes are recommended for lymph node stations crucial for lung cancer staging.
