Advanced

AJNR - American Journal of Neuroradiology

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Kishikawa, K. Articles by Iida, M. Search for Related Content PubMed PubMed Citation Articles by Kishikawa, K. Articles by Iida, M.

American Journal of Neuroradiology 23:924-928, June-July 2002
© 2002 American Society of Neuroradiology

HEAD AND NECK

Evaluation of Distal Extracranial Internal Carotid Artery by Transoral Carotid Ultrasonography in Patients with Severe Carotid Stenosis

Kazuhiro Kishikawa^a, Masahiro Kamouchi^a, Yasushi Okada^a, Tooru Inoue^b, Setsuro Ibayashi^c and Mitsuo Iida^c

^a Department of Cerebrovascular Disease, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
^b Department of Neurosurgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
^c Department of National Kyushu Medical Center, and the Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan

Address reprint requests to Kazuhiro Kishikawa, MD, Department of Cerebrovascular Disease, National Kyushu Medical Center, Jigyohama, Chuo-ku, Fukuoka 810-8563, Japan

BACKGROUND AND PURPOSE: Conventional ultrasonography techniques do not allow visualization of the distal cervical segment of the internal carotid artery (ICA). In a study of patients with severe ICA stenosis, we performed transoral carotid ultrasonography (TOCU) to assess its ability to image this segment of the artery.

METHODS: The study participants consisted of 20 consecutive patients who had severe carotid stenosis and who underwent carotid endarterectomy between 1999 and 2000. TOCU, conventional carotid ultrasonography, and cerebral angiography were prospectively performed before and after carotid endarterectomy.

RESULTS: In all patients, the distal portion of the ICA could be clearly detected by B mode using TOCU and no plaque was observed. The diameter of the distal portion of the ICA significantly increased after carotid endarterectomy (3.9 ± 0.5 mm [mean ± SD]), compared with before (3.5 ± 0.8 mm), when it was estimated by TOCU (P < .01). In seven patients, the postoperative diameter of the distal ICA increased >10%. The mean increase in the postoperative diameter was estimated to be 15.0 ± 23.0% by TOCU, which significantly correlated with the findings (23.9 ± 33.7%) based on cerebral angiography (P < .01). The diameter increased >10% postoperatively in 71% of the patients with the degree of cross-sectional stenosis >95% as shown by carotid ultrasonography and in 86% of the patients whose preoperative diameter was <3.0 mm.

CONCLUSION: TOCU provides additional information regarding the characteristics of the distal ICA that can be obtained neither by conventional carotid ultrasonography nor by angiography.

This article has been cited by other articles:

				M. Yasaka, T. Ogata, K. Yasumori, T. Inoue, and Y. Okada Bottle Neck Sign of the Proximal Portion of the Internal Carotid Artery in Moyamoya Disease. J. Ultrasound Med., December 1, 2006; 25(12): 1547 - 1552. [Abstract] [Full Text] [PDF]

				M. Kamouchi, K. Kishikawa, Y. Okada, T. Inoue, K. Toyoda, S. Ibayashi, and M. Iida Transoral Ultrasonographic Evaluation of Carotid Flow in Predicting Cerebral Hemodynamics after Carotid Endarterectomy AJNR Am. J. Neuroradiol., June 1, 2006; 27(6): 1295 - 1299. [Abstract] [Full Text] [PDF]

				M. Kamouchi, K. Kishikawa, Y. Okada, T. Inoue, S. Ibayashi, and M. Iida Reappraisal of Flow Velocity Ratio in Common Carotid Artery to Predict Hemodynamic Change in Carotid Stenosis AJNR Am. J. Neuroradiol., April 1, 2005; 26(4): 957 - 962. [Abstract] [Full Text] [PDF]

				M. Kamouchi, K. Kishikawa, Y. Okada, T. Inoue, S. Ibayashi, and M. Iida Poststenotic Flow and Intracranial Hemodynamics in Patients with Carotid Stenosis: Transoral Carotid Ultrasonography Study AJNR Am. J. Neuroradiol., January 1, 2005; 26(1): 76 - 81. [Abstract] [Full Text] [PDF]

				D. E. Hyde, A. J. Fox, I. Gulka, P. Kalapos, D. H. Lee, D. M. Pelz, and D. W. Holdsworth Internal Carotid Artery Stenosis Measurement: Comparison of 3D Computed Rotational Angiography and Conventional Digital Subtraction Angiography Stroke, December 1, 2004; 35(12): 2776 - 2781. [Abstract] [Full Text] [PDF]

				S. Fujimoto, K. Toyoda, T. Inoue, Y. Hirai, T. Uwatoko, K. Kishikawa, K. Yasumori, S. Ibayashi, M. Iida, and Y. Okada Diagnostic Impact of Transcranial Color-Coded Real-Time Sonography With Echo Contrast Agents for Hyperperfusion Syndrome After Carotid Endarterectomy Stroke, August 1, 2004; 35(8): 1852 - 1856. [Abstract] [Full Text] [PDF]