Sivan Y, Merlob P, Reisner S H
J Med Genet. 1983 Jun;20(3):213-5. doi: 10.1136/jmg.20.3.213.
In order to define normal values for ear length and position in the newborn infant, 198 (87 term and 111 preterm) infants were examined. In every case gestational age was determined chronologically and clinically. Ear length was measured from the superior to the inferior aspects of the ear. Using a horizontal line passing through the inner canthi of the eyes the portion of the ear above this line was measured, determining the position of the ear by its relation to total ear length. Normal values are presented by plotting the mean +/- 2 SD versus the gestational age. Small ears and low set ears are defined as values less than the mean -2 SD.
为了确定新生儿耳朵长度和位置的正常值，对198例婴儿（87例足月儿和111例早产儿）进行了检查。在每种情况下，均按时间顺序和临床方法确定胎龄。耳朵长度是从耳朵的上缘测量至下缘。通过内眦的水平线来测量该线以上耳朵的部分，根据其与耳朵总长度的关系来确定耳朵的位置。通过绘制平均值±2标准差与胎龄的关系图来呈现正常值。小耳和低位耳定义为小于平均值-2标准差的值。
