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本研究目的是用超声技术探讨夹层动脉瘤的血管弹性。研究对象包括夹层动脉瘤患者２６例和年龄、性别匹配的高血压对照组２２例及正常对照组２６例。测量包括主动脉瓣上方３ｃｍ处升主动脉收缩期和舒张期血管内径及平卧位静息状态下右上肢肱动脉血压；主动脉膨胀性用简化的Ｙｏｕｎｇ氏公式求得。结果显示夹层动脉瘤升主动脉膨胀性明显低于高血压组和正常对照组（Ｐ均＜０．０１）。其膨胀性与升主动脉内径呈线性相关，相关系数为－０．６１。本研究首次从血管弹性的角度揭示了夹层动脉瘤血管的异常。
The purpose of this study was to investigate the vascular elasticity of dissecting aneurysms using ultrasound techniques. The study included 26 patients with dissecting aneurysm, 22 age- and sex-matched hypertensive controls, and 26 normal controls. Measurements included systolic and diastolic vessel diameters of the ascending aorta 3 cm above the aortic valve and brachial artery blood pressure of the right upper limb in the supine position in the supine position; aortic dilatation was obtained using the simplified Young’s formula. The results showed that distensibility of the ascending aorta in dissecting aneurysms was significantly lower than that in the hypertension group and the normal control group (P < 0.01). The expansibility was linearly related to the diameter of the ascending aorta with a correlation coefficient of -0.61. This study reveals for the first time the abnormalities of blood vessels in dissecting aneurysms from the perspective of vascular elasticity.