Arterial imaging with a new forward-viewing intravascular ultrasound catheter, I. Initial studies.

Evans, James L.; Ng, K H; Vonesh, Michael J.; Kramer, Barry; Meyers, Sheridan N.; Mills, T A; Kane, Bonnie J.; Aldrich, W N; Jang, Yangsoo; Yock, Paul G.

doi:10.1161/01.cir.89.2.712

Cited by 55 publications

(19 citation statements)

References 17 publications

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“…Intracoronary angioscopy and conventional (side-looking) intravascular ultrasound can delineate the structure of stenotic, nonoccluded lesions; however, these techniques require crossing the lesion with a guidewire prior to imaging. A prototype version of a real-time, forward-looking intravascular ultrasound device was developed [6,7] and reported to be suitable for intracoronary use [8]. The forward-looking ultrasound device produces images of the artery in longitudinal cross-section; however, it is currently too bulky (5 Fr diameter) for use as a guiding device for chronic coronary occlusions.…”

Section: Discussionmentioning

confidence: 99%

Optical coherent reflectometry: A new technique to guide invasive procedures

Yamashita

Kasaoka

Son

et al. 2001

Cathet Cardio Intervent

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The success rate of percutaneous transluminal coronary angioplasty for chronic total arterial occlusions is still unsatisfactory. Inability to cross the lesion with a guidewire is a major cause of failure. Optical coherent reflectometry (OCR) is a new method of using laser light to measure the depth of tissue from the end of an optic fiber. This study tests whether an OCR prototype guidewire provides a guidance system that might be useful to assist reopening chronic total arterial occlusions. An OCR fiber optic within a 0.014″ hypotube was developed using the interference pattern of two reflected light beams (wave length 1,300 nm). To determine if OCR can distinguish different tissue types, plaques of human lower extremity arterial segments were visually divided into three types (calcified, white, or yellow). The slope of the initial reflectance of the OCR curve was calculated and compared between the three groups. In six other arteries, the OCR wire was advanced longitudinally through occluded human artery segments in vitro. Guidewire position was determined by OCR and compared to the position of the guidewire tip observed simultaneously by intravascular ultrasound (IVUS) imaging. In 16 arterial surface segments, calcified plaques had a significantly steeper slope than white or yellow plaques (−227.2 ± 82.2; −81.5 ± 12.9; −103.6 ± 19.6 dB/mm; P < 0.01). For the determination of the guidewire position, IVUS and OCR corresponded correctly in 82% of 28 measurements. Sensitivity and specificity of OCR for detection of plaque versus the media/adventitia boundary were 79% and 89%, respectively (P < 0.001). OCR can distinguish calcified from noncalcified plaque and may distinguish plaque from the media/adventitia boundary. This technology may be useful as a means to help navigate a guidewire safely through an occluded artery. Cathet Cardiovasc Intervent 2001;54:257–263. © 2001 Wiley‐Liss, Inc.

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Section: Discussionmentioning

confidence: 99%

Optical coherent reflectometry: A new technique to guide invasive procedures

Yamashita

Kasaoka

Son

et al. 2001

Cathet Cardio Intervent

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“…The availability of images ahead of the catheter tip would obviate the need for the side branch to advance the IVUS catheter, and therefore new forward-viewing catheters are under development [24,25] which can provide precise information of the CTO entry site and, combined with 3-dimesional reconstruction techniques, allow to visualize the lesion distal to the occlusion and provide real-time road maps of occluded vessels [24,25]. However, the prototype of forward-viewing IVUS catheter is too large for use in coronary arteries [24,25]; its miniaturization can facilitate the successful recanalizaion of stumpless CTO lesions.…”

Section: Discussionmentioning

confidence: 99%

Intravascular ultrasound guided recanalization of stumpless chronic total occlusion

Park

Jang

et al. 2011

International Journal of Cardiology

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“…4). Combination of B mode imaging with simultaneous Doppler velocimetry or construction of forward-looking sound tips are also possible [34,35].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Distal Anastomotic Intimal Hyperplasia: An Experimental Comparison by Arteriography, Duplex Sonography, Angioscopy, and Intravascular Ultrasound

Gunen

Trubel²,

Schwarzacher³

et al. 1999

Eur Surg Res

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Routine follow-up investigation methods after peripheral arterial bypass surgery, such as arteriography and colour duplex sonography, do not always allow correct analysis of moderate alterations in the vessel wall, e.g. initial stages of distal anastomotic intimal hyperplasia (DAIH). The aim of this study was to evaluate the efficiency of angioscopy and intravascular ultrasound compared to the named routine methods regarding detection of early DAIH. Eight months after bilateral femoropopliteal bypass surgery with venous grafts in 18 sheep, we investigated the distal anastomotic sites using the named methods. The findings were then correlated to histologic specimens. Intravascular ultrasound presented the highest sensitivity followed by angioscopy, with results markedly different from the findings arrived at by conventional methods.

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Arterial imaging with a new forward-viewing intravascular ultrasound catheter, I. Initial studies.

Abstract: These preliminary data suggest that a forward-viewing IVUS catheter is feasible, accurate, and useful for evaluation of arterial geometry distal to the catheter tip.

Cited by 55 publications

References 17 publications

Optical coherent reflectometry: A new technique to guide invasive procedures

Optical coherent reflectometry: A new technique to guide invasive procedures

Intravascular ultrasound guided recanalization of stumpless chronic total occlusion

Evaluation of Distal Anastomotic Intimal Hyperplasia: An Experimental Comparison by Arteriography, Duplex Sonography, Angioscopy, and Intravascular Ultrasound

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