Muramatsu K, Hirose S, Yukitake K, Ogata H, Mitsudome A, Oda T
Pediatr Res. 1987 Jan;21(1):21-4. doi: 10.1203/00006450-198701000-00006.
In 16 newborn infants (24 6-39 wk 6 days 830-3390 g) at ages between 0-70 days, the skin's electrical resistance was measured. Over 30 min we sequentially measured direct current resistance between two skin electrodes placed on the abdomen. The resistance was found to be low in very premature infants with gestation ages of 30 wk or less. It increased with both gestational age and postnatal age. In these infants, the resistance measured at 30 min during the first 4 days of life (3.4 +/- 0.3 K omega; mean +/- SD) was significantly less than that found at 20-70 days (8.8 +/- 1.2 k omega; p less than 0.001). The relationship between the infant's electrical skin resistance (y) and the gestational age (x) best fit the exponential formula: y = 7.42 X e0.24x X 10(-4) + 2.74. This formula shows that the electrical skin resistance increases exponentially during the last trimester. The measurement of electrical skin resistance is a quantitative method that can be utilized to evaluate the gestational age of infants.
对16例0至70日龄的新生儿（胎龄24周6天至39周6天，体重830至3390克）测量了皮肤电阻。在30多分钟的时间里，我们依次测量了放置在腹部的两个皮肤电极之间的直流电阻。结果发现，胎龄30周及以下的极早产儿的电阻较低。电阻随胎龄和出生后年龄的增加而增加。在这些婴儿中，出生后前4天在30分钟时测得的电阻（3.4±0.3千欧；平均值±标准差）明显低于20至70天时测得的电阻（8.8±1.2千欧；p<0.001）。婴儿皮肤电阻（y）与胎龄（x）之间的关系最符合指数公式：y = 7.42×e0.24x×10(-4)+2.74。该公式表明，在妊娠晚期皮肤电阻呈指数增加。皮肤电阻测量是一种可用于评估婴儿胎龄的定量方法。
