Rasmussen Todd E, Panneton Jean M, Kalra Manju, Hofer Jan M, Lewis Bradley D, Rowland Charles M, Bower Thomas C, Cherry Kenneth J, Noel Audra A, Gloviczki Peter
Division of Vascular Surgery, Mayo Clinic and Mayo Medical School, Rochester, MN 55905, USA.
J Vasc Surg. 2003 Feb;37(2):374-80. doi: 10.1067/mva.2003.27.
The purpose of this study was to assess the intraoperative use of a new angle-independent ultrasound scan device (EchoFlow [EF]) in measurement of carotid artery velocities after endarterectomy. Specifically, the purpose was to determine the reproducibility of velocity measurements obtained with EF and to compare these measurements with the velocity measurements obtained with duplex ultrasound scan.
Velocity measurements of the common, internal, and external carotid arteries were performed by the operative surgeon with EF in 65 consecutive patients after carotid endarterectomy (36 female, 29 male; mean age, 71 years). Three velocity measurements were obtained from each of the arteries with EF and compared with the velocity measurements obtained with duplex ultrasound scan performed by a radiologist.
Velocity measurements obtained with the EF device were reproducible in the common, internal, and external carotid arteries (intrapatient correlation coefficients, 0.95, 0.96, and 0.95, respectively). Seventy-five percent of common, 88% of internal, and 78% of external carotid velocity measurements obtained with the angle-independent ultrasound scan device were within 25 cm/s of the velocities measured with duplex ultrasound scan. The mean differences in velocity measurements between EF and duplex scan were -12 cm/s in the common, -8 cm/s in the internal, and -11 cm/s in the external carotid arteries. Differences between the EF device and duplex scan velocity measurements correlated with increasing arterial velocities in each of the three arteries measured (P <.05).
Reproducible measurements of carotid artery velocity may be obtained with a new angle-independent Doppler system after endarterectomy. Most measurements obtained with the EF system are clinically comparable with those obtained with standard duplex ultrasound scan. This novel low-cost device may be useful in the intraoperative assessment of hemodynamic adequacy of carotid endarterectomy.
本研究旨在评估一种新型非角度依赖性超声扫描设备（EchoFlow [EF]）在颈动脉内膜切除术后测量颈动脉血流速度中的术中应用。具体而言，目的是确定使用EF获得的血流速度测量的可重复性，并将这些测量结果与使用双功超声扫描获得的血流速度测量结果进行比较。
65例连续接受颈动脉内膜切除术的患者（36例女性，29例男性；平均年龄71岁），由手术医生使用EF对颈总动脉、颈内动脉和颈外动脉进行血流速度测量。从每条动脉使用EF获得三次血流速度测量，并与放射科医生进行的双功超声扫描获得的血流速度测量进行比较。
使用EF设备获得的颈总动脉、颈内动脉和颈外动脉血流速度测量具有可重复性（患者内相关系数分别为0.95、0.96和0.95）。使用非角度依赖性超声扫描设备获得的颈总动脉血流速度测量的75%、颈内动脉的88%和颈外动脉的78%在双功超声扫描测量速度的25 cm/s范围内。EF与双功扫描之间血流速度测量的平均差异在颈总动脉中为-12 cm/s，在颈内动脉中为-8 cm/s，在颈外动脉中为-11 cm/s。EF设备与双功扫描血流速度测量之间的差异与所测量的三条动脉中每条动脉血流速度的增加相关（P<.05）。
颈动脉内膜切除术后，使用新型非角度依赖性多普勒系统可获得可重复的颈动脉血流速度测量。使用EF系统获得的大多数测量结果在临床上与使用标准双功超声扫描获得的结果相当。这种新型低成本设备可能有助于术中评估颈动脉内膜切除术的血流动力学充分性。
