目的 探讨在早期早产儿配方奶(PF)喂养失败下,更换母乳(HM)或深度水解奶(eHF)对极低出生体质量儿喂养不耐受(FI)的改善情况。方法 选择2016年1月—2018年1月在广州市妇女儿童医疗中心出生、生后PF喂养失败、出现FI的极低出生体质量儿84例,根据家长HM喂养意愿及条件,分为HM喂养组38例和eHF喂养组46例,比较2组患儿更换喂养配方后FI消失时间、FI改善率、达全肠内喂养时间及体质量增长情况等喂养结局。结果 相对于eHF喂养组,HM喂养组FI消失时间更快,FI改善率更高,达全肠内喂养时间更快,差异有统计学意义。HM喂养组平均每日体质量增长量、出院时体质量均明显大于eHF喂养组,住院时间更短,出院时宫外发育迟缓(EUGR)发生率更低,差异有统计学意义。2组患儿坏死性小肠结肠炎、胆汁淤积症、院内感染发生率比较无统计学差异。结论 当极低出生体质量儿PF喂养失败、出现FI时,选择HM或eHF均可改善FI,但HM效果更好,达全肠内喂养时间更快且体质量增长更理想,出院时EUGR发生率较低。

Objective To investigate the improvement of feeding intolerance (FI) by changing human milk (HM) or extensively hydrolyzed formula(eHF) after failure of preterm formula (PF) feeding in very low birth weight (VLBW) infants. Methods Eighty-four VLBW infants who were born in Guangzhou Women and Children's Medical Center from January 2016 to January 2018 with PF feeding failure and FI were divided into HM feeding group (n=38) and eHF feeding group (n=46) according to their parents' HM feeding willingness and conditions.The time of FI disappearance, FI improvement rate, total enteral feeding time and weight gain were compared between the two groups after changing feeding formula. Results Compared with the eHF feeding group, the disappearance time of FI, the time of getting total intestinal feeding in the HM feeding group were shorter, and the improvement rate of FI was higher,the differences were statistically significant.The average daily weight increase and discharge weight of the HM feeding group were significantly more than those of the eHF feeding group, and the length of hospital stay, the incidence of extrauterine growth retardation(EUGR) at discharge were lower, the differences were statistically significant.There was no significant difference in the incidence of necrotizing enterocolitis, cholestasis and nosocomial infection between the two groups. Conclusions In the case of failure of PF feeding and FI in VLBW infants, both HM and eHF could ameliorate FI, but HM had a better effect, with a shorter time of getting total intestinal feeding, better weight gain and a lower incidence of EUGR at discharge.

目的 观察低出生体重早产儿应用抗生素后肠道菌群的动态变化。方法 选取2018年6月—2019年7月在广州市第一人民医院住院的10名低出生体重早产儿,在出生时、出生后1~2周、出生后2~3周、出生后3~4周、出生后4~5周、出生后5~6周时分别收集粪便样本,通过16s高通量测序检测患儿粪便菌群变化并统计分析。结果 应用抗生素后的低出生体重早产儿肠道菌群α多样性(Shannon指数、Simpson指数、ACE指数和PD_whole_tree指数)下降(P均<0.05),肠道菌群结构在门、科、属水平均发生改变,其中Alistipes、Bacteroides、Lactobacillus、unidentified_Lachnospiraceae、unidentified_Ruminococcaceae、Alloprevotella、unidentified_Cyanobacteria、Bacillus、Stenotrophomonas和Acinetobacter菌属相对丰度减少(P均<0.05)。结论 低出生体重早产儿应用抗生素后肠道菌群多样性下降,肠道菌群结构发生改变,并在抗生素停用后仍持续,针对性补充益生菌或益生元可能有助于肠道菌群恢复稳态。

Objective To observe the dynamic changes of gut microbiota in premature infants with low birth weight after antibiotics therapy. Methods 10 low birth weight premature infants hospitalized in Guangzhou First People's Hospital from June 2018 to July 2019 were included. Fecal samples were collected at birth, 1~2 weeks after birth, 2~3 weeks after birth, 3~4 weeks after birth, 4~5 weeks after birth and 5~6 weeks after birth, respectively. The changes of fecal microbiota were detected and analyzed by 16s high-throughput sequencing. Results The α-diversity of gut microbiota (Shannon index, Simpson index, ACE index and PD_whole_tree index) in low birth weight preterm infants treated with antibiotics decreased (P<0.05). The structure of gut microbiota changed at phylum, family and genus levels, among which Alistipes, Bacteroides, Lactobacillus, unidentified_Lachnospiraceae, unidentified_Ruminococcaceae, Alloprevotella, unidentified_Cyanobacteria, Bacillus, Stenotrophomonas and Acinetobacter decreased (P<0.05). Conclusion The diversity of gut microbiota in low birth weight preterm infants decreased and the structure of gut microbiota changed after antibiotic therapy. Targeted supplementation of probiotics or prebiotics may contribute to the recovery of gut microbial homeostasis.