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Chinese Journal of Critical Care & Intensive Care Medicine(Electronic Edition) ›› 2023, Vol. 09 ›› Issue (03): 251-258. doi: 10.3877/cma.j.issn.2096-1537.2023.03.003

• Clinical Research • Previous Articles     Next Articles

Correlation between the cytokine levels in serum and BALF and intrapulmonary and extrapulmonary ARDS

Rui Chen, Hongna Yang, Wei Fang(), Xinxin Li, Tiantian Li, Xiaoyi Yu, Yanxue Wang, Wenyu Li   

  1. Department of Critical Care Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Shandong Provincial Hospital, Jinan 250021, China
    Department of Critical Care Medicine, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Shandong Provincial Hospital, Jinan 250021, China; Clinical Medical College of Shandong University, Jinan 250021, China
  • Received:2022-05-11 Online:2023-08-28 Published:2023-11-27
  • Contact: Wei Fang

Abstract:

Objective

To analyze the correlation between the cytokine levels in serum and bronchoalveolar lavage fluid (BALF) and intrapulmonary and extrapulmonary acute respiratory distress syndrome (ARDS).

Methods

A single-center retrospective study was conducted to collect the clinical data of all ARDS patients requiring mechanical ventilation who were admitted to the Department of Critical Care Medicine of Shandong Provincial Hospital from August 2021 to January 2022. According to the inclusion criteria and exclusion criteria, 30 patients were finally included. ARDS patients were divided into intrapulmonary group caused by direct lung injury and extrapulmonary group that caused by indirect lung injury. Clinical data, cytokine levels (IL -6, IL-10, IL-1β, TNF-α, IL-8), neutrophil ratio (Neu%), lymphocyte ratio (Lym%), disease severity and clinical outcome and clinical biological indicators were collected. Spearman analysis was used for correlation analysis of continuous variables, and logistic regression analysis was used to determine the influencing factors of different type of ARDS.

Results

The duration of mechanical ventilation in extrapulmonary group was shorter than that in intrapulmonary group (Z=2.593, P=0.008). There were no significant differences of serum Lym%, BALF IL-10, BALF/serum IL-10, BALF/serum TNF-α and BALF/serum Neu% while significant differences in other variables between the two groups (P<0.05). Spearman correlation analysis showed that the level of IL-1β in BALF/ serum was positively correlated with the duration of mechanical ventilation in the intrapulmonary group (r=0.773, P=0.015). Logistic regression analysis showed that serum TNF-α and Neu% were the influencing factors of ARDS patients (OR=2.833, 95%CI: 1.136-7.063, P=0.025; OR=0.879, 95%CI: 0.776-0.995, P=0.041).

Conclusion

The level of IL-1β in BALF/serum is positively correlated with the duration of mechanical ventilation inpatients with intrapulmonary ARDS. Although the expression levels of cytokines in serum and BALF are significantly different between patients with intrapulmonary and extrapulmonary ARDS, TNF-α and Neu% in serum can distinguish them.

Key words: Acute respiratory distress syndrome, Intrapulmonary cause, extrapulmonary cause, Bronchoalveolar lavage fluid, Cytokines

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