应用出生体重低于2500克作为未成熟儿的判定标准已被认为是不完善的,它既不能除外足月的体重低于2500克的小于胎龄(Small fordate)婴儿,又不包括不足月的体重超过2500克的未成熟儿。近来,对出生体重低于2500克的婴儿统称为低出生体重(low birth weight)婴儿,就包括了未成熟儿和小于胎龄婴儿。对小于胎龄婴儿的病因、临床特点和处理方法等近年来国外报导不少,现综合有关资料作一简单介绍。 The use of birth weight less than 2,500 grams as a criterion for immature children has been considered as an imperfect measure that does not exclude small fordate babies weighing less than 2500 grams of full-term babies, Immature children weighing more than 2,500 grams. Recently, infants weighing less than 2,500 grams are collectively referred to as low birth weight infants, including immature infants and infants younger than gestational age. The etiology, clinical features and treatment of infants less than gestational age in recent years a lot of foreign reports, is a comprehensive summary of relevant information for a brief introduction.