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Diagnostic and Therapeutic Endoscopy
Volume 2017 (2017), Article ID 1497831, 5 pages
https://doi.org/10.1155/2017/1497831
Research Article

Comparison of the Diagnostic Yield of EUS Needles for Liver Biopsy: Ex Vivo Study

1Temple University, Philadelphia, PA, USA
2University of Maryland, Baltimore, MD, USA

Correspondence should be addressed to Peter Darwin

Received 9 May 2017; Accepted 13 August 2017; Published 13 September 2017

Academic Editor: Timothy A. Woodward

Copyright © 2017 Woo Jung Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background and Aims. EUS-guided liver biopsy is an emerging method of liver tissue acquisition which is safe and had been shown to produce excellent histological yield. There is limited data comparing the diagnostic yield of different FNA needles. We aimed to compare the diagnostic performance of four commercially available 19-gauge FNA needles. Methods. Four FNA needles and one percutaneous needle were used to perform liver biopsies on two human cadaveric livers: Cook Echotip Procore™, Olympus EZ Shot 2™, Boston Scientific Expect Slimline™, Covidien SharkCore™, and an 18-gauge percutaneous needle (TruCore™, Argon Medical Devices). Each needle obtained biopsies by three, six, and nine complete back-and-forth motions of the needle (“throw”) with a fanning technique. The combined lengths of specimen fragments and the total number of complete portal tracts (CPT) were measured by a blinded pathologist. One-way analysis of variance (ANOVA) and Bonferroni correction were used for statistical analysis. Results. A total of 52 liver biopsies were performed. The Covidien SharkCore needle had significantly greater number of CPT compared to other FNA needles. The number of “throws” did not impact the number of CPT significantly. There was no statistically significant difference in mean total specimen length between each FNA needle type. Conclusion. The Covidien SharkCore needle produced superior histological specimen by capturing more CPT, possibly due to its unique needle design.