Document Detail

Wireless surveillance for transjugular intrahepatic portosystemic shunts (TIPS): a feasibility study.
MedLine Citation:
PMID:  20207314     Owner:  NLM     Status:  MEDLINE    
RATIONALE AND OBJECTIVES: Shunt surveillance is a critical component of follow-up for patients with cirrhosis with transjugular intrahepatic portosystemic shunts (TIPS). Transabdominal Doppler ultrasound analysis of the shunt has been used as a noninvasive means of assessing shunt function. Doppler ultrasound analysis of the shunt is less sensitive than direct transjugular portosystemic pressure gradient measurement for detecting shunt failure. A wireless, noninvasive means of measuring the portosystemic pressure gradient in the clinic may facilitate follow-up in this group of patients. The aim of this study was to determine if two implanted wireless pressure sensors could accurately transmit a portosystemic pressure gradient across a TIPS. MATERIALS AND METHODS: Two wireless microelectromechanical system pressure sensors were placed in a swine model for measuring the portosystemic pressure gradient across a TIPS. Catheter-based pressure transducers were also placed and used as the gold standard. Pressures from both systems were measured concurrently. RESULTS: Wireless microelectromechanical system portal and systemic pressure measurements were accurate within +/-2 mm Hg (mean, 0.86 mm Hg) of the gold standard. CONCLUSION: The use of wireless sensors may facilitate the surveillance of shunt function in patients with portal hypertension who have undergone placement of TIPS.
Ken K Hirasaki; John A Watts; Paul V Suhocki
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Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Academic radiology     Volume:  17     ISSN:  1878-4046     ISO Abbreviation:  Acad Radiol     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-03-08     Completed Date:  2010-06-08     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9440159     Medline TA:  Acad Radiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  418-20     Citation Subset:  IM    
Copyright Information:
Copyright 2010 AUR. Published by Elsevier Inc. All rights reserved.
Duke University Medical Center, Durham, NC 27710, USA.
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MeSH Terms
Blood Pressure Determination / instrumentation*
Equipment Design
Equipment Failure Analysis
Feasibility Studies
Hypertension, Portal / diagnosis*,  physiopathology,  therapy*
Micro-Electrical-Mechanical Systems / instrumentation
Monitoring, Ambulatory / instrumentation*
Portasystemic Shunt, Transjugular Intrahepatic / instrumentation*
Reproducibility of Results
Sensitivity and Specificity
Telemetry / instrumentation*
Transducers, Pressure*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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