Document Detail

Progress in ring array transducers for real-time 3D ultrasound guidance of cardiac interventional devices.
MedLine Citation:
PMID:  21842583     Owner:  NLM     Status:  MEDLINE    
As a treatment for aortic stenosis, several companies have recently introduced prosthetic heart valves designed to be deployed through a catheter using an intravenous or transapical approach. This procedure can either take the place of open heart surgery with some ofthe devices or delay it with others. Real-time 3D ultrasound could enable continuous monitoring of these structures before, during and after deployment. We have developed a 2D ring array integrated with a 30 French catheter that is used for transapical prosthetic heart valve implantation. The transducer array was built using three 46 cm long flex circuits from MicroConnex (Snoqualmie, WA) which terminate in an interconnect that plugs directly into our system cable; thus, no cable soldering is required. This transducer consists of 210 elements at 0.157 mm interelement spacing and operates at 5 MHz. Average measured element bandwidth was 26% and average round-trip 50 ohm insertion loss was -58.1 dB after correcting for diffractive losses. The transducer was wrapped around the 1 cm diameter lumen of a heart-valve deployment catheter. Prosthetic heart valve images were obtained in water-tank studies.
Edward D Light; Victor Lieu; Stephen W Smith
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Ultrasonic imaging     Volume:  33     ISSN:  0161-7346     ISO Abbreviation:  Ultrason Imaging     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-08-16     Completed Date:  2011-09-27     Revised Date:  2014-09-19    
Medline Journal Info:
Nlm Unique ID:  7909167     Medline TA:  Ultrason Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  197-204     Citation Subset:  IM    
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MeSH Terms
Aortic Valve Stenosis / therapy*
Cardiac Catheterization
Echocardiography, Three-Dimensional / instrumentation*
Equipment Design
Heart Valve Prosthesis*
Heart Valve Prosthesis Implantation / instrumentation,  methods*
Ultrasonography, Interventional / instrumentation*
Grant Support

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

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