CAN INFLAMMATORY MARKERS PREDICT THE SUCCESSFUL EXTUBATION IN PATIENTS WITH COVID-19?

ABSTRACT

SESSION TITLE Lessons from the ICU What have We Learned about the Management of COVID-19 SESSION TYPE Original Investigations PRESENTED ON October 18-21, 2020 PURPOSE: A high mortality rate (up to 97%) has been observed in intubated Coronavirus Disease 2019 (COVID-19) patients;advanced age, high SOFA score, and elevated inflammatory markers are common risk factors. Data are scarce regarding the predictors of successful extubation in these patients. The purpose of our study is to compare inflammatory markers including lactate dehydrogenase (LDH), ferritin, D-dimer, interleukin-6 levels (IL-6) in successfully extubated patients with the non-survivors. Patients 65 years or older were excluded. Puja Mehta et al. suggested that patients with severe COVID-19 have cytokine storm syndrome associated with poor prognosis. The clinical judgement regarding successful extubation in COVID-19 patients is still evolving. We hypothesized that the successfully extubated patients would have lower levels of inflammatory markers. METHODS: This is a single-centre, retrospective observational study approved by the institutional review board (IRB). SARS-CoV-2 confirmed intubated patients (n=12) with age <65 years were included. Data were manually extracted from electronic medical records. We compared patients who were successfully extubated (Group A) and those who died (Group B). Group A had six male patients, while group B had six patients with a male to female ratio of 21. To investigate the association of inflammatory markers with successful extubation, statistical analysis was performed using the Wilcoxon two-sample test. RESULTS: Mean values of LDH max, ferritin max, D-dimer max during hospitalization, and IL-6 level on admission in group A were 793 IU/L, 1266.8 ng/ml, 3.6 FEU, and 69.37 pg/ml respectively. Mean values of LDH max, ferritin max, D-dimer max during the hospitalization, and IL-6 level on admission in group B were 1693.8, 6136.6, 4.2, and 10606.86 respectively. Group B had higher mean values as compared to group A. The mean values of ferritin max and IL-6 on admission showed a statistically significant difference in both groups ( p-values 0.008, 0.03 respectively). However, the difference in mean values of LDH max and D-dimer max (p-value 0.17, 0.45 respectively) were not significant. CONCLUSIONS: Higher values of inflammatory markers were seen in COVID-19 patients who died as compared to patients who successfully got extubated. Our data indicate that patients who were successfully weaned off the invasive mechanical ventilation had lower levels of ferritin and IL-6 as compared to patients who died. However, statistical significance could not be established for LDH and D-dimer. Limitations of our study include small sample size and single-centre data. CLINICAL IMPLICATIONS Higher mean values of inflammatory markers (ferritin and IL-6) can correlate with the severity of the illness and failed extubation. Replicative studies with larger sample size will define the clinical impact of our findings. DISCLOSURES No relevant relationships by Denise Lauren Dalmacion, source=Web Response No relevant relationships by Kenneth Granet, source=Web Response No relevant relationships by Ali Jaffery, source=Web Response No relevant relationships by Ikwinder Preet Kaur, source=Web Response No relevant relationships by Violet Kramer, source=Web Response No relevant relationships by Mohsin Mughal, source=Web Response No relevant relationships by Chandler Patton, source=Web Response