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 观察表皮生长因子(EGF)在新生儿坏死性小肠结肠炎(NEC)患儿肠组织中的动态表达情况,探讨EGF在NEC病程中起到的保护作用。方法 选取15例NEC患儿行一期回肠造瘘手术治疗的回肠组织为实验组(NEC组),将以上15例NEC患儿行二期回肠封瘘手术治疗的回肠组织为对照组(封瘘组),采用免疫组织化学技术检测,通过光密度测算软件(IPP)分析回肠组织中的EGF表达。结果 EGF主要表达于肠壁黏膜层,少量表达于黏膜下层、肌层。EGF在NEC组各层表达平均光密度值为:黏膜层(0.241±0.075),黏膜下层(0.213±0.061),肌层(0.1397±0.026),差异有统计学意义(P＜0.05);在封瘘组各层表达情况为:黏膜层(0.211±0.028),黏膜下层(0.119±0.022),肌层(0.097±0.007),差异有统计学意义(P＜0.05)。EGF在NEC组总体表达平均光密度值为(0.198±0.071),明显高于封瘘组(0.146±0.058),差异有统计学意义(P＜0.05)。结论 表皮生长因子(EGF)在新生儿坏死性小肠结肠炎(NEC)肠组织中的表达较封瘘组显著上调,推测EGF可能与NEC炎症相关,可能在NEC炎症过程中起到了一定的保护作用。

Objective We realized that EGF could play an important protective role against NEC. However, the practical condition of the distribution and expression of EGF in intestine of infants with NEC was indefinite. In order to figure out this problem,we carried out this experimentation. Methods The sample were divided into two group.The experimental group(necgroup) were composed of fifteen individual intestinal tissues after the ileostomy were performed on those infants suffered from NEC. The control group(sealing fistula group) were composed of fifteen individual intestinal tissues after the ileal closure fistula were performed on the same infants who were accepted the one-stage ileostomy in the period of NEC and were later accepted the two-stage operation on the condition that their bodies almost recovered from NEC after two to three months gone.Then, we utilized immunohistochemistry to test the distribution and quantities of EGF on those samples of the two group infants. Results The characteristic of EGF expression in intestine of the both group included strong positive expression in mucous layer and less expression in strata submucosum and muscular coat. The average optical density in nec group was mucous layer (0.241±0.075),strata submucosum(0.213±0.026),muscular coat (0.1397±0.022);In the control groupmucous layer (0.211±0.028),strata submucosum (0.119±0.022),muscular coat (0.097±0.007). The expression of EGF in intestinal tissues increased in the period of NEC0.198±0.071 by comparing with the control group (0.146±0.058). Conclusion There may be a correlation between the strong positive expression of EGF in intestinal tissues in the period of NEC and inflammation.By combining the result of this experiment and the research about EGF. We assumed that EGF is one factor of the protective mechanism by which injured intestinal mucous could be recovered and resist inflammation.