Singh K, Bønaa K H, Solberg S, Sørlie D G, Bjørk L
Department of Radiology, University Hospital, Tromsø, Norway.
Eur J Vasc Endovasc Surg. 1998 Jun;15(6):497-504. doi: 10.1016/s1078-5884(98)80109-3.
To assess the variability of ultrasonographic measurements at different levels of the abdominal aorta.
Reproducibility study as part of a population health screening for abdominal aortic aneurysm.
In 1994/1995 a total of 6892 subjects underwent ultrasound examination of the abdominal aorta. Variability of measurements was assessed in the beginning and end of the survey period by inviting 112 randomly selected participants to a second ultrasound scan within 3 weeks of the first scan. The subjects were examined by an experienced radiologist and three sonographers who had been given a short course in ultrasonography. All examiners were blinded to each other's results.
Variability was similar in the beginning and end of the survey period. Both the intra- and interobserver variability were less than 4 mm for all sonographers in measurements of maximal infrarenal aortic diameter, and variability was similar for measurements in the anterior-posterior and transverse plane. Variability was greater for measurements at the renal level than aortic bifurcation level. The radiologist had lower variability than the other sonographers.
Ultrasound measurements of the maximal diameter can be obtained with a high degree of accuracy. Inexperienced sonographers may achieve acceptable performance given appropriate training and surveillance.
评估腹主动脉不同水平超声测量的变异性。
作为腹主动脉瘤人群健康筛查一部分的重复性研究。
1994/1995年，共有6892名受试者接受了腹主动脉超声检查。在调查期开始和结束时，通过邀请112名随机选择的参与者在首次扫描后3周内进行第二次超声扫描，评估测量的变异性。受试者由一名经验丰富的放射科医生和三名接受过短期超声检查课程培训的超声医师进行检查。所有检查者对彼此的结果均不知情。
调查期开始和结束时的变异性相似。在测量肾下腹主动脉最大直径时，所有超声医师的观察者内和观察者间变异性均小于4毫米，前后平面和横向平面测量的变异性相似。肾水平测量的变异性大于主动脉分叉水平。放射科医生的变异性低于其他超声医师。
超声测量最大直径可获得高度准确性。给予适当培训和监督，经验不足的超声医师也可取得可接受的表现。
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