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Value of “Patent Track” Sign on Doppler Sonography After Percutaneous Liver Biopsy in Detection of Postbiopsy Bleeding: A Prospective Study in 352 Patients

Authors
 Kyoung Won Kim  ;  Min-Jeong Kim  ;  Tae Kyoung Kim  ;  Mi-Suk Park  ;  So Yeon Kim  ;  Seong Ho Park  ;  Hyo-Cheol Kim 
Citation
 AMERICAN JOURNAL OF ROENTGENOLOGY, Vol.189(1) : 109-116, 2007 
Journal Title
 AMERICAN JOURNAL OF ROENTGENOLOGY 
ISSN
 0361-803X 
Issue Date
2007
Abstract
OBJECTIVE. The purpose of our study was to determine the prevalence of the “patent track” sign on Doppler sonography after percutaneous liver biopsy and to assess its value in detection of postbiopsy bleeding. SUBJECTS AND METHODS. The study group included 352 patients who underwent Doppler sonography after 361 percutaneous liver biopsies. Color-flow images were obtained immediately and 5 minutes after the biopsies. Images were evaluated for the patent track sign, defined as linear color flow along the needle path. Patients were followed-up with clinical and laboratory findings to search for postbiopsy bleeding. Those suspected of having postbiopsy bleeding underwent CT. Sonographic results were compared with clinical and CT findings. RESULTS. Clinically significant postbiopsy bleeding occurred in five patients (1%). On Doppler sonography immediately after the biopsies, the patent track sign was seen in 43 patients (12%). Patients with this sign more frequently bled than those without it (p = 0.0008). Sensitivity, specificity, positive predictive values, and negative predictive values in detection of postbiopsy bleeding were 80%, 89%, 9%, and 100%, respectively. Among these patients, this sign was persistently seen in four and disappeared in the remaining 39 at 5 minutes after the biopsies. Patients with a persistent patent track sign more frequently bled than those without it (p < 0.0001). Sensitivity, specificity, positive predictive value, and negative predictive value were 60%, 100%, 75%, and 99%, respectively. CONCLUSION. A patent track sign, frequently seen on Doppler sonography immediately after percutaneous liver biopsy, provides excellent screening for postbiopsy bleeding. This sign strongly predicts postbiopsy bleeding when persistently seen for 5 minutes.
Full Text
http://www.ajronline.org/doi/full/10.2214/AJR.07.2071
DOI
10.2214/AJR.07.2071
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Radiology (영상의학교실) > 1. Journal Papers
Yonsei Authors
Kim, Min Jung(김민정) ORCID logo https://orcid.org/0000-0003-4949-1237
Park, Mi-Suk(박미숙) ORCID logo https://orcid.org/0000-0001-5817-2444
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/95578
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