利用CT肺密度评价NUSS手术后肺通气恢复情况

CT density for evaluating lung ventilation recovery of pectus excavatum after NUSS operation

目的应用CT图像测量漏斗胸患儿术前术后肺密度,评估漏斗胸患儿肺通气恢复情况。方法选取NUSS术治疗漏斗胸的患儿98例,术前术后分别行胸部CT平扫,应用域值限定技术测量双肺肺密度,同时在胸骨压迫层面左前、右前、左后、右后各选取一兴趣区,测量术前术后肺密度值。定量对比术前术后各区域肺密度变化程度,评估NUSS手术后漏斗胸患儿肺通气恢复的程度。结果 NUSS手术后肺密度平均有所升高,全肺、左肺、右肺变化程度相近,但胸骨压迫层面左前肺肺密度变化不明显。结论 NUSS手术可以一定程度改善漏斗胸患儿肺通气情况。但是长期胸骨压迫可能对周围肺组织造成永久性损伤。

Objective To determine the efficacy of lung density measurement on CT for evaluating pulmonary ventilation recovery in children with pectus excavatum after NUSS operation.Methods Chest CT was performed on 98 children with pectus excavatum before and after NUSS operation.CT densities in the whole,left and right lungs as well as left anterior,right anterior,left posterior,and right posterior lung regions on axial images with the most severe sternal compression were measures and compared.Results The densities of the whole,left and right lungs were increased in the same degree after NUSS operation whereas the densities were unchanged in the left anterior lung with the most severe sternal compression.Conclusion Lung ventilation is improved in children with pectus excavatum after NUSS operation.Sternal compression may cause permanent damage to the surrounding lung tissue.