超声评价甲状腺激素水平与甲状腺动脉内径和血流速度的关系

目的：观察甲状腺激素对甲状腺的动脉宽度和血流参数的影响。方法：用彩色多普勒血流显像（CDFI）观察50例Graves＇病（GD组），35例摄^131I低性甲状腺功能亢进（非GD甲亢组），16例甲状腺功能减退（甲减组）及25例正常对照（对照组）的甲状腺上动脉（STA）、舒张期内径（D）、收缩期最高血流速度（Vmax）、舒张末期血流速度（Vmin）和阻力指数（Pa）。结果：（1）甲减组及GD组的D、Vmax和Vmin显著高于非GD甲亢组与正常组，而前2组和后2组之间比较，除D外差异无统计学意义（P〉0．05）。（2）在甲减组和非GD甲亢组中，促甲状激素（TSH）与D、Vmax、Vmin呈显著正相关。结论：决定舒张期内径和血流速度的不是甲状腺激素，而是促甲状腺激素。

The Relationship between Serum Thyroid Hormone Levels and Thyroid Artery Inter Diameter and Blood Flow Evaluated by Ultrasound

Objective: To observe the effect of thyroid hormone on the inner width of superior thyroid artery and the parameter of blood flow. Methods: The inner width of superior thyroid artery ,diastolic inner diameter(D), systolic maximal velocity(Vmax),diastolic minimal velocity (Vmin) and resistance index (RI)were observed in fifty cases with Graves'disease(the GD group),thirty-five cases with low iodine uptake hyperthyroid patients(the non-GD group), sixteen cases of primary hypothyroidism with Goitrous Hashimoto's thyroiditis and twenty-five normal controls with color doppler flow imaging. Results:(1) D, Vmax and Vmin in the hypothyroid group and the GD group were much higher than those in the non-GD group and the normal control group,the difference between former two groups and latter two groups was not statistical except for D(P < 0.05).(2)Thyroid stimulating hormone (TSH) had positive relationship with D, Vmax and Vmin in the hypothyroid group and the non GD group. Conclusion: The result suggests that it is not the level of thyroid hormone but TSH is responsible for the diastolic inner diameter and thyroid blood flow.