超声检测肺动脉参数及肺动脉瓣环Z值在小儿法乐四联症根治术式选择中的临床价值

摘要

目的:探讨经胸超声心动图(TTE)检测肺动脉参数及肺动脉瓣环Z值在小儿法乐四联症根治术式选择中的临床价值.方法:回顾性分析我院实施法乐四联症根治术患儿143例,中位数年龄为8(1~171)个月.依据不同手术方式将患者分为跨环组(n=100)和留瓣组(n=43).对TTE测量常规参数、右心室流出系统参数、肺动脉瓣环Z值等比较,对TTE与术中测量的肺动脉瓣环内径测量值进行相关分析.结果:跨环组与留瓣组相比,左心室舒张末期内径(mm,23.14±3.82 vs 25.23±4.56)、肺动脉瓣环内径(mm, 8.52±2.18 vs 10.01±2.61)和主肺动脉内径(mm,67.31(7.0,3.6)vs 82.91(7.5,5.6)均较低,差异均有统计学意义(P均<0.05).不同肺动脉瓣环Z值的患儿间,随着肺动脉瓣环Z值减小,跨环组患儿比例逐渐增加,留瓣组患儿比例逐渐降低(P均<0.05).TTE测量肺动脉瓣环内径与术中测量值中等程度相关(r=0.581,P<0.001).结论:TTE测量获得的肺动脉瓣环内径、主肺动脉内径及肺动脉瓣环Z值均是术前给手术医师提供的客观参数,具有明确的临床应用价值.%Objective: To investigate the clinical value of transthoracic echocardiography (TTE) measured pulmonary artery parameters and pulmonary valve annulus Z scores for choosing the type of operation in complete repair of pediatric tetralogy of Fallot (TOF) Methods: A total of 143 patients received complete repair of pediatric TOF in our hospital were retrospectively studied. The patient's median age was 8 (1-171) months. Based on the type of operation, patients were divided into 2 groups: Trans-annular patch group, n=100 and Valve sparing repair group, n=43. Conventional TTE parameters, right ventricular outflow parameters and pulmonary valve annulus Z scores were compared between 2 groups; pulmonary valve annulus diameters measured by TTE and surgery were studied by correlation analysis. Results: Compared with Valve sparing repair group, Trans-annular patch group had decreased left ventricular end diastolic diameter (23.14±3.82) mm vs (25.23±4.56) mm, pulmonary valve annulus diameter (8.52±2.18) mm vs (10.01±2.61) mm and main pulmonary artery diameter (67.31 vs 82.91) all P<0.05. With reduced value of pulmonary valve annulus Z scores, the constituent ratio in Trans-annular patch group was gradually increasing and in Valve sparing repair group was gradually decreasing, all P<0.05. Correlation analysis indicated that pulmonary valve diameters measured by TTE and surgery had moderate agreement (r=0.581, P<0.001). Conclusion: TTE measured pulmonary valve annulus diameter, main pulmonary artery diameter and pulmonary valve annulus Z scores were the objective parameters provided to surgeon at pre-operation, which had clear clinical value.