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目的观察不同哺乳阶段早产儿母乳中淀粉酶活性变化,并与足月儿母乳作比较。方法测定36例早产儿乳母和40名足月儿乳母不同泌乳期母乳中淀粉酶活性。结果早产儿乳母其初乳淀粉酶活性较高,为10232.93±1·48IU/L,随着泌乳期的延长,淀粉酶活性逐渐下降。与足月儿母乳相似,早产儿母乳淀粉酶98%为唾液型淀粉酶。不同胎龄早产儿其母乳淀粉酶活性均值较接近,差异无统计学意义。分别比较早产和足月母乳在各泌乳阶段的淀粉酶活性显示,在任何一阶段,早产母乳淀粉酶活性的绝对值略高于足月母乳,但差异无统计学意义,P均>0·05。结论早产儿母乳含有较高活性的淀粉酶,对早产儿的淀粉消化和潜在的抗感染作用具有重要意义,应鼓励对早产儿进行母乳喂养。
Objective To observe the changes of amylase activity in breast milk of preterm infants during different stages of lactation and compare with full-term breast milk. Methods The amylase activity in breast milk from 36 lactating mothers and 40 term nursing mothers during different lactation periods was determined. Results The lactase of preterm infant had a higher amylase activity of 10232.93 ± 1.48 IU / L and the amylase activity decreased gradually with the prolongation of lactation. Similar to full-term breastmilk, 98% of breast milk amylase in preterm infants is salivary amylase. The average amylase activity of breast milk in different gestational age premature children is close, the difference was not statistically significant. The amylase activity in each stage of lactation compared with that of preterm and full term breast milk respectively showed that the absolute value of amylase activity in preterm labor was slightly higher than that of full term breast milk at any stage, but the difference was not statistically significant (P> 0.05) . Conclusion Breast milk contains high activity of amylase in preterm infants, which has important significance for starch digestion and potential anti-infection in premature infants. Breastfeeding of premature infants should be encouraged.