1.中山大学孙逸仙纪念医院急诊科,广东 广州 510120
2.中山大学孙逸仙纪念医院重症医学科,广东 广州 510120
杜静,第一作者,研究方向:急危重症,E-mail:dujing8@mail.sysu.edu.cn
收稿:2025-11-07,
修回:2025-12-29,
录用:2025-12-31,
纸质出版:2026-01-20
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杜静,林帆荣,张洁等.mNGS在EICU脓毒症患者中的临床应用及影响因素[J].中山大学学报(医学科学版),2026,47(01):152-161.
DU Jing,LIN Fanrong,ZHANG Jie,et al.Clinical Application and Influencing Factors of High-throughput Sequencing in Sepsis Patients Admitted to the EICU[J].Journal of Sun Yat-sen University(Medical Sciences),2026,47(01):152-161.
杜静,林帆荣,张洁等.mNGS在EICU脓毒症患者中的临床应用及影响因素[J].中山大学学报(医学科学版),2026,47(01):152-161. DOI: 10.11714/jsysu.med.YX20250164.
DU Jing,LIN Fanrong,ZHANG Jie,et al.Clinical Application and Influencing Factors of High-throughput Sequencing in Sepsis Patients Admitted to the EICU[J].Journal of Sun Yat-sen University(Medical Sciences),2026,47(01):152-161. DOI: 10.11714/jsysu.med.YX20250164.
目的
2
在急诊重症监护室(EICU)脓毒症患者中,探讨宏基因高通量测序技术(mNGS)的临床应用价值及其指导精准抗感染治疗的意义,并分析影响mNGS阳性检出率及患者预后的关键因素。
方法
2
回顾性分析2020年11月至2024年10月在中山大学孙逸仙纪念医院EICU收治的524例脓毒症患者临床资料,比较mNGS与传统培养在阳性检出率、病原体构成及一致性方面的差异;评估感染部位、基础疾病及免疫状态对mNGS阳性检出率的影响,并分析根据mNGS结果调整抗感染方案对患者预后的作用。
结果
2
mNGS阳性检出率显著高于传统培养(85.11%
vs
. 47.14%,
P
<0.001)。mNGS可快速
识别稀有及混合感染病原体,且在免疫抑制及血液系统疾病患者中阳性检出率更高(
P
<0.05)。根据mNGS结果调整抗感染方案在短期临床疗效方面差异不大,但患者的28 d病死率存在显著差异(调整组39.1%、未调整组76.3%、支持组31.4%;
χ
2
=22.44,
P
<0.001)。多因素Logistic回归分析显示,多因素分析显示,年龄和呼吸机使用是病原学阳性检出的独立影响因素;年龄、冠心病、SOFA评分、胆红素水平及呼吸机和血管活性药物使用是28 d死亡的独立危险因素,而血小板及肾功能状态呈现一定保护作用。根据mNGS结果调整抗感染方案的患者,临床改善趋势明显,抗生素疗程和发热缓解时间缩短,28 d病死率呈下降趋势。
结论
2
mNGS在EICU脓毒症患者病原学诊断中具有高灵敏度和广覆盖优势,为精准抗感染治疗提供重要依据。患者的年龄、基础疾病、疾病严重程度及器官功能状态是影响病原学检出率与短期预后的关键因素,为临床识别高危患者和优化治疗策略提供参考。
Objective
2
To explore the clinical value of metagenomic next-generation sequencing(mNGS) in patients with sepsis admitted to the Emergency Intensive Care Unit(EICU),evaluate its role in guiding precision antimicrobial therapy, and to identify key factors influencing mNGS positivity and patient prognosis.
Methods
2
This retrospective study analyzed clinical data from 524 patients with sepsis admitted to the EICU of Sun Yat-sen Memorial Hospital, Sun Yat-sen University, from November 2020 to October 2024. The positive detection rate, pathogen spectrum, and concordance between mNGS and conventional culture were compared. Factors including infection site, underlying diseases, and immune status associated with mNGS positivity were evaluated. The impact of adjusting antimicrobial therapy based on mNGS results on patient prognosis was also analyzed.
Results
2
The positive detection rate of mNGS was significantly higher than that of conventional culture (85.11%
vs
. 47.14%,
P
< 0.001). mNGS enabled rapid identification of rare pathogens and mixed infections, with higher positivity observed in immunosuppressed patients and those with hematological disorders (
P
< 0.05). Adjustment of antimicrobial therapy based on mNGS results showed no significant difference in short-term clinical response; however, 28-day mo
rtality differed significantly among groups (adjusted group 39.1%, non-adjusted group 76.3%, supportive group 31.4%;
χ
²= 22.44,
P
< 0.001). Multivariate logistic regression analysis identified age and mechanical ventilation as independent factors associated with pathogen positivity. Age, coronary heart disease, SOFA score, bilirubin level, and the use of mechanical ventilation and vasoactive drugs were independent risk factors for 28-day mortality, whereas platelet count and renal function showed protective associations. Patients whose antimicrobial therapy was adjusted based on mNGS results demonstrated a trend toward clinical improvement, shorter antibiotic duration, faster fever resolution, and lower 28-day case fatality rate.
Conclusion
2
mNGS demonstrates high sensitivity and broad pathogen coverage for etiological diagnosis in EICU sepsis patients and provides critical support for precision antimicrobial therapy. Patient age, underlying diseases, disease severity, and organ function are key determinants of pathogen detection and short-term prognosis, offering valuable guidance for risk stratification and optimization of therapeutic strategies.
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