Catheter ultrasound for cross-sectional imaging and drug delivery to vessel wall

John A. Hossack

doi:10.1117/12.2182103

20 May 2015 Catheter ultrasound for cross-sectional imaging and drug delivery to vessel wall

John A. Hossack

Proceedings Volume 9496, Independent Component Analyses, Compressive Sampling, Large Data Analyses (LDA), Neural Networks, Biosystems, and Nanoengineering XIII; 949606 (2015) https://doi.org/10.1117/12.2182103
Event: SPIE Sensing Technology + Applications, 2015, Baltimore, MD, United States

Abstract

Current methods for delivery of an anti-restenosis drug to an arterial vessel wall post-percutaneous transluminal angioplasty and stent placement are limited in terms of drug choice, dosing level, and ability to assure drug coverage between the struts of a drug eluting stent. Intravascular ultrasound (IVUS) provides real-time, radiation-free, imaging and assessment of atherosclerotic disease in terms of anatomical, functional and molecular information. In this presentation, the design of a dual imaging / therapy IVUS catheter is described and results documenting gene and drug delivery reported. Microbubbles and drug / gene (shell associated or co-injected) are dispensed from the catheter tip. Using this approach, it becomes possible to address the need for complete vessel wall coverage and achieve delivery in regions poorly addressed using conventional stent-based approaches. A range of in vitro, ex vivo and in vivo results are presented. Our most recent results involve a demonstration in a pig model of coronary balloon angioplasty that produced a 33% reduction in neointima formation versus a drug plus microbubble, but no ultrasound, control.

Citation Download Citation

John A. Hossack "Catheter ultrasound for cross-sectional imaging and drug delivery to vessel wall", Proc. SPIE 9496, Independent Component Analyses, Compressive Sampling, Large Data Analyses (LDA), Neural Networks, Biosystems, and Nanoengineering XIII, 949606 (20 May 2015); https://doi.org/10.1117/12.2182103

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KEYWORDS

Intravascular ultrasound

Ultrasonography

Transducers

Arteries

Acoustics

Americium

Imaging systems

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