脐动脉血气结合肺彩超对新生儿肺炎诊断价值影响的临床研究

Objective To explore the diagnostic value of umbilical artery blood gas combined with lung color Doppler ultrasound in neonatal infectious pneumonia. Methods Sixty children with suspected neonatal infectious pneumonia admitted to the Neonatology Department of Shunde Hospital Affiliated to Jinan University from January 2023 to June 2026 were selected, and all underwent umbilical artery blood gas examination and lung color Doppler ultrasound examination. According to the diagnostic criteria of the Clinical Diagnosis and Treatment Guidelines for Neonatal Infectious Pneumonia(2025 Edition), the children were divided into a confirmed group(39 cases) and an excluded group(21 cases). They were further divided into a positive group(40 cases) and a negative group(20 cases) based on the results of umbilical artery blood gas combined with lung color Doppler ultrasound. The umbilical artery blood gas indexes, inflammatory indexes, respiratory scores and length of hospital stay were compared among the groups, and the diagnostic efficacy of the combined examination was evaluated. Results The levels of pH, PO2 and BE in the confirmed group were significantly lower than those in the excluded group, while the levels of PCO2, WBC, admission respiratory score and length of hospital stay were significantly higher than those in the excluded group(P<0.05). The difference trend of the above indexes between the positive group and the negative group of the combined examination was consistent with that between the confirmed group and the excluded group(P<0.05). The sensitivity, specificity, positive predictive value, negative predictive value and Youden index of the combined diagnosis were 92.31%, 80.95%, 90.00%, 85.00% and 0.7326, respectively. Conclusion Umbilical artery blood gas combined with lung color Doppler ultrasound has high accuracy and reliability in diagnosing neonatal infectious pneumonia. It can effectively distinguish between sick and non-sick children, provide an important basis for early clinical accurate diagnosis, and is worthy of clinical promotion.