目的：探讨喉气道数字化X线摄影在诊断婴幼儿急性喉炎中的应用价值。方法收集365例摄取喉部X线摄影的患儿，其中正常组325例，喉炎组41例。测量声门下区咽后椎前软组织厚度及相应气管前后径。对不同年龄组建立正常参考值范围，并将喉炎组测量值与正常值比较。结果正常组不同年龄组男女测量值无差异。正常咽后椎前软组织厚度0-1岁组为11.03±0.77mm，1-2岁组为10.72±0.62mm，2-5岁组为10.14±0.55mm；气管前后径0-1岁组为5.08±0.28mm，1-2岁组为5.20±0.31mm，2-5岁组为5.91±0.92mm，各年龄组两个正常参考值范围均有显著性差异(Welch分别为36.955和50.995，P均为0.000)。各年龄组喉炎患儿均表现为咽后椎前软组织增厚和气管前后径狭窄，与相应的正常组测量值有显著性差异(P均为0.000)。结论喉气道X线测量费用低廉，简单易行，能无创性地、活体评价小儿急性喉炎及临床疗效，对于提高急性气道梗阻患儿抢救成功率、生存率有重大的临床意义。%Objectives To investigate the value of larynx airway digital radiography in the diagnose of acute laryngitis. Methods 365 patients underwent radiography were included in this study. The soft tissue width and corresponding trachea diameter were measured in each case. Normal reference range in different age group were set up. Furthermore, the measures in acute laryngitis were compared with normal group. Results There is no significant difference between male and female children. Normal retropharyngeal soft tissue width is 11.03±0.77 mm in 0-1 age,10.72±0.62 mm in 1-2 age,10.14±0.55 mm in 2-5 age, respectively; Normal anteroposterior diagmeter of trachea is 5.08±0.28 mm in 0-1 age,5.20±0.31 mm in 1-2 age,5.91±0.92 mm in 2-5 age, respectively. There is significant difference among different age groups (Welch value is 36.955 and 50.995, P values are 0.000). The radiological sign of acute laryngitis is thickening of retropharyngeal soft tissue and narrowing of trachea diameter (P values are 0.000) Conclusion Larynx X-ray is a cheap, readily available examination in clinical practice. It could diagnosis acute laryngitis and evaluate the treatment. It plays an important role in improving the rescue success rate and survive rate of children acute airway obstruction.
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