LOGIQ E9 Shear Wave Elastrography for Detection of Liver Fibrosis in Patients with Chronic Hepatitis C Virus.

Abstract:

OBJECTIVES:Shear wave elastography (SWE) is an emerging technology that assesses hepatic fibrosis. The aim of our study was to determine the diagnostic accuracy of General Electric (GE) Healthcare's LOGIQ E9 SWE in patients with chronic hepatitis C virus using liver biopsy as the reference standard. METHODS:The liver stiffness of 43 subjects with hepatitis C virus was assessed using LOGIQ E9 SWE immediately before they underwent liver biopsy. The Fibrosis-4 Index (FIB-4) and Aspartate Aminotransferase-to-Platelet Index (APRI) were calculated, and the sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were determined. RESULTS:Mild hepatic fibrosis (F0-F2) was noted in 30 of the 43 (69.7%) patients and advanced disease (F3-F4) was seen in 13 of the 43 (30.3%) individuals. Using the GE LOGIQ E9 SWE proposed cutoff value of ≥9.4 kPa for advanced fibrosis, the sensitivity, specificity, PPV, and NPV were only 69.2%, 73.3%, 52.9%, and 84.6%, respectively. The post hoc analysis identified best cutoff values of <9.4 and ≥12 kPa, thereby classifying 76% of patients with an NPV of 84.6% and a PPV of 85.7%. The Aminotransferase-to-Platelet Index results were as follows: 83.3%, sensitivity, 95.2% specificity, 83.3% PPV, and 95.2% NPV in 27 of the individuals (37% remained unclassifiable). The FIB-4 Index demonstrated 100% sensitivity, 76.9% specificity, 66.6% PPV, and 100% NPV; however, 24 (56%) of the patients were classified within the indeterminate range. CONCLUSIONS:In our cohort, the proposed GE LOGIQ value of ≥9.4 kPa did not adequately discriminate subjects with advanced fibrosis. Further prospective evaluation of our post hoc analyses is warranted to identify the ideal cutoff values for the LOGIQ E9 system.

journal_name

South Med J

journal_title

Southern medical journal

authors

Abrams GA,Jamal H,Deeter WT 3rd,Patil N

doi

10.14423/SMJ.0000000000000562

subject

Has Abstract

pub_date

2016-11-01 00:00:00

pages

730-734

issue

11

eissn

0038-4348

issn

1541-8243

pii

SMJ50289

journal_volume

109

pub_type

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