Carrico C W, Zerin J M
Department of Radiology, Indiana University Medical Center, Riley Hospital for Children, 702 Barnhill Drive, Indianapolis, IN 46202-2920, USA.
Pediatr Radiol. 1996;26(8):553-5. doi: 10.1007/BF01372240.
This prospective study was designed to determine the effect of patient positioning on sonographic measurements of renal length in children. Materials and methods. Two dedicated pediatric ultrasonographers (observers A and B) measured the sonographic lengths of 48 kidneys in 25 children (two had unilateral renal agenesis). Each observer obtained the two "longest possible" measurements for each kidney with the patient in three positions: supine, contralateral decubitus, and prone. Patients with myelomeningocele, hydronephrosis, and renal cysts were excluded.
Both examiners obtained significantly higher values for renal lengths with the children lying supine (observer A P </= 0.0017; observer B P </= 0.0409) or in contralateral decubitus (observer A P </= 0.0001; observer B P </= 0.0419) than with them lying prone. There was no significant difference between the supine and decubitus measurements. The mean difference between the supine and prone measurements for the observers was 3.0 mm for observer A and 1.8 mm for observer B. The mean difference between the contralateral decubitus and prone measurements was 3.0 mm for observer A and 1.6 mm for observer B.
Sonographic measurements of renal length made with the patient lying supine or in contralateral decubitus yield slightly higher values than those made with the patient prone.
本前瞻性研究旨在确定患儿体位对肾脏长度超声测量的影响。材料与方法。两名专业儿科超声检查人员（观察者A和B）对25名儿童（其中两名单侧肾缺如）的48个肾脏进行了超声长度测量。每位观察者在患儿处于仰卧位、对侧卧位和俯卧位三种体位时，对每个肾脏获取两个“尽可能最长”的测量值。排除患有脊髓脊膜膨出、肾积水和肾囊肿的患儿。
两位检查者均发现，患儿仰卧位（观察者A P≤0.0017；观察者B P≤0.0409）或对侧卧位（观察者A P≤0.0001；观察者B P≤0.0419）时肾脏长度测量值显著高于俯卧位。仰卧位和侧卧位测量值之间无显著差异。观察者A仰卧位和俯卧位测量值的平均差值为3.0毫米，观察者B为1.8毫米。观察者A对侧卧位和俯卧位测量值的平均差值为3.0毫米，观察者B为1.6毫米。
患儿仰卧位或对侧卧位时肾脏长度的超声测量值略高于俯卧位时的测量值。
