不同角度的楔形导声垫对测量颈动脉血流速度影响的临床研究

Clinical study on the effect of slanted gel pads with different angles on the measurements of carotid blood flow velocity

目的通过对比观察不同角度的楔形导声垫在颈动脉超声检查中获得的参数,探讨楔形导声垫在血管超声检查中的应用价值。方法对50例颈动脉超声检查结果阴性的成人患者右侧颈总动脉进行超声检查,在无导声垫及使用18°、25°、32°楔形导声垫四种条件下测量颈总动脉收缩期峰值流速(Peak systolic velocity,PSV,cm/s)及多普勒角度。结果无导声垫及使用18°、25°、32°楔形导声垫,测得的颈总动脉PSV分别为(90.10±8.21)cm/s、(84.42±7.91)cm/s、(78.30±7.88)cm/s、(72.25±7.62)cm/s,差异均有统计学意义,P值均<0.01,变异系数(Coefficient of Variation,CV)分别为0.091、0.094、0.100、0.101;多普勒角度校正分别为(59.78±0.51)°、(54.92±1.51)°、(50.78±2.48)°、(46.22±2.82)°,差异均有统计学意义,P值均<0.01,CV分别为0.008、0.027、0.049、0.061。结论增加楔形导声垫角度可明显降低颈动脉血流速PSV及多普勒角度,潜在提高了超声评估颈动脉血流速度的准确性,对PSV的变异系数影响不明显。

Objective To investigate the application value of slanted gel pads in carotid ultrasonography by comparing the parameters obtained by slanted gel pads with different angles.Methods The right common carotid artery was examined by ultrasonography in 50 adult patients with negative carotid artery ultrasonography.The peak systolic velocity(PSV,cm/s)and Doppler Angle of the common carotid artery were measured without and with the use of slanted gel pads of 18°,25°and 32°.Results The PSV of common carotid artery was 90.10±8.12 cm/s,84.42±7.91 cm/s,78.30±7.88 cm/s,(72.25±7.62)cm/s without and with the use of slanted gel pads of 18°,25°and 32°,the differences were statistically significant(P<0.01);The Doppler angle correction were(59.78±0.51)°,(54.92±1.51)°,(50.78±2.48)°and(46.22±2.82)°,respectively.The differences were statistically significant(P<0.01),and the CV were 0.008,0.027,0.049 and 0.061,respectively.Conclusion Increasing the angle of slanted gel pads can significantly reduce the carotid artery PSV and Doppler angle,potentially improve the accuracy of ultrasonic evaluation of carotid artery flow velocity,and has no obvious effect on the coefficient of variation of PSV.