Objective: To identify risk factors for minimally invasive surfactant administration (MISA) failure in the treatment of preterm infants with respiratory distress syndrome (RDS) and the influence of MISA failure on neonatal outcome.
Methods: A retrospective analysis was performed for the clinical data of 148 preterm infants with a gestational age of ≤32 weeks and a clinical diagnosis of RDS, who were admitted to the neonatal intensive care unit of eight tertiary hospitals in Beijing, Tianjin and Hebei Province from July 1, 2017 to December 31, 2018 and were treated with MISA (bovine pulmonary surfactant, PS). According to whether MISA failure (defined as the need for mechanical ventilation within 72 hours after MISA) was observed, the infants were divided into two groups: MISA failure group (n=16) and MISA success (n=132). A logistic regression analysis was used to investigate the risk factors for MISA failure and its influence on neonatal outcome.
Results: The MISA failure rate was 10.8% (16/148). The logistic regression analysis showed that a high incidence rate of grade >II RDS before PS administration, low mean arterial pressure and high pulse pressure before administration, a low dose of initial PS administration, and long injection time and operation time were the risk factors for MISA failure (OR=5.983, 1.210, 1.183, 1.055, 1.036, and 1.058 respectively, P<0.05). After the control for the above risk factors, the logistic regression analysis showed that the MISA failure group had a significantly higher incidence rate of bronchopulmonary dysplasia (BPD) (OR=8.537, P<0.05).
Conclusions: A high grade of RDS, a low mean arterial pressure, and a high pulse pressure before administration are independent risk factors for MISA failure, and a low dose of initial PS administration, a long injection time, and a long operation time may increase the risk of MISA failure. MISA failure may increase the incidence rate of BPD in preterm infants.
目的: 探讨肺表面活性物质微创给药方式（MISA）治疗早产儿呼吸窘迫综合征（RDS）失败的高危因素及其对早产儿的影响。
方法: 回顾性分析2017年7月1日至2018年12月31日京津冀地区8家三级医院新生儿重症监护病房应用MISA给予牛肺表面活性物质（PS）治疗胎龄≤ 32周，且临床考虑为RDS早产儿（n=148）的基本信息、围产期情况、用药情况、合并症、临床转归等病例资料。根据MISA治疗是否失败（MISA失败定义为MISA后72 h内需要机械通气）分为MISA失败组（n=16）和MISA成功组（n=132）。应用logistic回归分析MISA失败的高危因素及其对早产儿的影响。
结果: MISA失败率为10.8%（16/148）。logistic回归分析结果显示用药前RDS > Ⅱ级发生率高、用药前平均动脉压低、用药前脉压差大、首次给药剂量低、注药时间及总操作时间长是MISA失败的危险因素（分别OR=5.983、1.210、1.183、1.055、1.036、1.058，P < 0.05）。控制上述高危因素后行logistic回归分析结果显示MISA失败组BPD的发生率高（OR=8.537，P < 0.05）。
结论: 给药前RDS程度重、血压监测平均动脉压低、脉压差大是MISA失败的独立危险因素；首次PS给药剂量低、注药时间及总操作时间长可能增加MISA失败的风险；MISA失败可能导致早产儿BPD发生率增加。