肺表面活性物质替代治疗与支气管肺发育不良的关系

目的 探讨不同剂量肺表面活性物质(PS)替代治疗早产儿肺透明膜病(HMD)与发生支气管肺发育不良(BPD)的关系.方法 将2005年1月至2007年12月入住本院新生儿科并出现生后进行性呼吸困难且胸片提示考虑诊断为HMD的403例早产儿,依据家属经济条件使用旨剂PS情况分三组进行前瞻性的临床对照研究:低剂量PS组(L-PS组,剂量≤100 mg/kg,n=188)、高剂量PS组(H-PS组,剂量>100mg/kg,n=94)和未使用PS组(N-PS组, n=121);采用自身对照和组间比较观察PS治疗6 h后患儿吸氧浓度(FiO2)、肺部氧合功能,以及三组问观察总氧疗时间、机械通气时间、再次插管机械通气率、住院时间和BPD发生情况.结果 与N-PS组患儿比较,在给予Ps治疗6 h后,L-PS组和H-PS组两组患儿的FiO2,OI明显降低,PO2和a/A PO2比值均明显升高(P<0.05);氧疗时间和机械通气时间均明显缩短,较少发生再次插管机械通气(P<0.05);且以H-PS组患儿改变显著,差异均具有统计学意义(P<0.05).H-PS组患儿BPD发生(11例,11.7%)明显低于N-PS组(29例,24.0%),差异具有统计学意义(F1-3=4.267,P=0.006);L-PS组BPD发牛(34例,18.1%)虽然低于N-PS组,但差异无统计学意义(F1-2=1.354,P=0.062).结论 PS替代治疗能有效地改善肺部氧合功能,减少机械通气时间和再次插管机械通气发生率,且以大剂量(>100mg/kg)的效果更明显,并能有效地预防BPD的发生.

Effect of pulmonary surfactant on the incidence of bronchopulmonary dysplasia

Objective To explore, the effect of different dosage of pulmonary surfactant (PS) on the inci-dence of bronchopulmanary dysplasia. Method Four hundred and three premature infants with hyaline membrane disease were divided into 3 groups according to the dose of PS: low-dose group (L-PS group, ≤ 100 mg/kg, n =188) ,high-dose group(H-PS group, > 100 mg/kg, n = 94) and no-PS group (N-PS group, n = 121). The frac-tional inspired oxygen(FiO2) and ptlmonary oxygenating function before and after 6 hours treatment were observed and the durations of oxygen therapy and mechanical ventilation, frequency of repeated intubafion, length of hospi-talization and the incidence of BPD were compared among the three groups. Results After 6 hours PS administra-tion, the FiO2,oxygen index and duration of oxygen therapy and mechanical ventilation were significantly decreased (P <0.05), while PO2 and the arterio-alveolar partial pressure of oxygen were significantly increased (P <0.05)in the H-PS and L-PS groups, compared with the N-PS group. Compared with the L-PS and N-PS groups,the H-PS group showed a decreased incidence of BPD. Conclusions PS administration could improve the pul-monary oxygenation and prevent the development of BPD, especially in high-dose.