Carotid hemodynamics and the ocular pulse in carotid stenosis
Carotid hemodynamics and the ocular pulse in carotid stenosis
复制标题
颈动脉狭窄时的颈动脉血流动力学和眼脉搏
作者：
M. Best
节段体积描记法用于外周血管疾病的研究，以获得有关肢体血流的信息。在存在动脉阻塞性疾病的情况下，流向肢体的血流会减少，并且记录的脉搏轮廓会发生多种变化。这些主要包括脉搏幅度减小、坏死斜率变平、重搏切迹消失以及波峰时间延迟。1 颈动脉闭塞性疾病患者研究的类似方法导致了多种记录眼部和眼眶脉搏的方法的发展。这些方法基于以下事实：眼动脉是颈内动脉的第一个主要分支，因此反映了闭塞病变远端颈动脉树中血流动力学的异常。眼脉搏已通过眼压计、眼脉描记法、眼动力描记法、眼体积描记法和吸盘技术进行记录。’-T 在存在同侧颈动脉闭塞性疾病的情况下，眼脉搏最常见的异常是脉搏幅度减小。然而，波形的图形和傅里叶分析的标准技术尚未应用于眼脉冲，因为脉冲轮廓的记录尚未得到充分明确的定义。该实验室开发的吸盘技术克服了这一困难，该技术产生的眼脉搏记录包含经典动脉压脉搏的所有特征。*本研究的目的是确定反映眼脉搏轮廓的变化。
SEGMENTAL PLETHYSMOGRAPHY is utilized in the study of peripheral vascular disease to obtain information concerning blood flow in the limb. In the presence of arterial obstructive disease, blood flow to the limb is reduced and multiple alterations occur in the contour of the recorded pulse. Primarily these consist of a decrease in pulse amplitude, a flattening of the anacrotic slope, a loss of the dicrotic notch, and a time delay in the crest.1 A similar approach to the study of patients with carotid occlusive disease has resulted in the development of a variety of methods to record ocular and orbital pulses. These methods are based on the fact that the ophthalmic artery is the first major division of the internal carotid artery and, therefore, reflects abnormalities of hemodynamics in the carotid vascular tree distal to an occlusive lesion. Ocular pulses have been recorded by tonometry, oculosphygmography, ophthalmodynamography, ophthalmic plethysmography, and the suction cup technique.’-T In the presence of homolateral carotid occlusive disease, the most commonly demonstrated abnormality in the ocular pulse is a reduction of pulse amplitude. Standard techniques of graphic and Fourier analysis of wave forms, however, have not been applied to the ocular pulse because recordings of pulse contour have not been sufficiently well defined. This difficulty has been overcome by the suction cup technique developed in this laboratory which results in ocular pulse recordings that contain all the characteristics of a classical arterial pressure pulse.* The purpose of this investigation was to determine the alterations in ocular pulse contour that reflect