Transoral carotid ultrasonography.
Transoral carotid ultrasonography.
复制标题
经口颈动脉超声检查。
作者：
Masahiro Yasaka;K. Kimura;R. Otsubo;Katsunori Isa;K. Wada;K. Nagatsuka;K. Minematsu;T. Yamaguchi
背景和目的
我们尝试使用经口方法（经口颈动脉超声检查[TOCU]）对远端颅外颈内动脉（伊卡）进行超声检查评价。
方法
受试者包括5名健康志愿者和7名中风患者。使用配备凸阵换能器（7或9.5 MHz）的彩色多普勒血流成像系统进行检查，该系统最初设计用于经直肠使用。在咽部局部麻醉后，我们经口插入一个覆盖有薄牙龈的探针，使其尖端接触咽部后外侧壁。然后，我们试图检测伊卡和测量血流速度的远端颅外伊卡使用的主图像由TOCU获得。
结果
在所有受试者中成功进行了TOCU，没有遇到任何困难。在健康志愿者中，伊卡在2.2+/-0.6 cm的深度处被识别，可视化为长度为2.9+/-0.3 cm且略微向后弯曲的垂直线性血管。远端颅外伊卡的直径和平均流速分别为4.7+/-0.2 mm和50+/-7 cm/s。在脑卒中患者中，获得了一些显著的发现，包括可能存在伊卡夹层的患者中的狭窄伊卡伴低流速，急性心源性伊卡闭塞患者中的透明回声无血流信号，以及同侧MCA狭窄患者中的伊卡流速降低。
结论
这些初步数据表明，TOCU的潜在适用性，以评价在远远端颅外伊卡的流量。TOCU绝对值得在颈动脉疾病患者中进行进一步研究。
BACKGROUND AND PURPOSE
We attempted ultrasonographic evaluation of the distal extracranial internal carotid artery (ICA) using the transoral method (transoral carotid ultrasonography [TOCU]).
METHODS
The subjects consisted of five healthy volunteers and seven stroke patients. Examinations were performed with a color Doppler flow imaging system equipped with convex array transducers (7 or 9.5 MHz), originally designed for transrectal use. After local anesthesia of the pharynx, we inserted a probe covered with thin gum transorally, touching the tip to the pharyngeal posterolateral wall. We then attempted to detect the ICA and measure flow velocity of the distal extracranial ICA using principal images obtained by TOCU.
RESULTS
TOCU was successfully performed in all subjects without any difficulty. In the healthy volunteers, the ICA was identified at a depth of 2.2+/-0.6 cm and visualized as a vertical linear vessel 2.9+/-0.3 cm in length and bent slightly backward. The diameter and mean flow velocity of the distal extracranial ICA were 4.7+/-0.2 mm and 50+/-7 cm/s, respectively. In the stroke patients, some remarkable findings were obtained, including a narrow ICA with low flow velocity in a patient with possible ICA dissection, a lucent echo without flow signal in a patient with acute cardioembolic ICA occlusion, and decreased ICA flow velocity in a patient with ipsilateral MCA stenosis.
CONCLUSIONS
These preliminary data demonstrate the potential applicability of TOCU to the evaluation of flow in the far distal extracranial ICA. TOCU definitely warrants further investigation in patients with carotid artery disease.