To assess the efficacy of Color and Power Doppler ultrasound (CDI) in the evaluation of patency and in the detection of thrombosis or stenosis of TIPS. Between October 1992 and February 1997 190 patients underwent TIPS placement in our Department. The patient population has been divided into two separate groups. The first series consist in 82 patients, which underwent CDI and venography at routinely scheduled follow up intervals). The second series consist of 76 patients, which underwent only CDI follow up: portal venograms were performed solely on the basis of a suspected shunt disfunction during sonographic examination. First group: in the routine follow up group 212 sonographic-angiographic correlations were available. There were 6 false-negative and 3 false positive, with overall sensitivity of 89% and specificity of 95%. 2nd group: in this group of 31 correlations (performed because of sonographic suggestion of shunt disfunction), CDI correctly predicted 26 stenoses and 5 occlusions, with only one false positive. Thus CDI was 100% sensitive and 97% specific in predicting shunt malfunction. CDI is highly accurate in identifying a failing shunt. In the absence of clinical signs of shunt insufficiency, it helps to obviate the use of direct portography.
|Journal||Ultrasound in Medicine and Biology|
|Issue number||Suppl 1|
|Publication status||Published - 1997|
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging