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KMID : 1144420230380020172
Acute and Critical Care
2023 Volume.38 No. 2 p.172 ~ p.181
Relationship between positive end-expiratory pressure levels, central venous pressure, systemic inflammation and acute renal failure in critically ill ventilated COVID-19 patients: a monocenter retrospective study in France
Pierre Basse

Louis Morisson
Romain Barthelemy
Nathan Julian
Manuel Kindermans
Magalie Collet
Benjamin Huot
Etienne Gayat
Alexandre Mebazaa
Benjamin G. Chousterman
Abstract
Background The role of positive pressure ventilation, central venous pressure (CVP) and inflammation on the occurrence of acute kidney injury (AKI) have been poorly described in mechanically ventilated patient secondary to coronavirus disease 2019 (COVID-19).

Methods This was a monocenter retrospective cohort study of consecutive ventilated COVID-19 patients admitted in a French surgical intensive care unit between March 2020 and July 2020. Worsening renal function (WRF) was defined as development of a new AKI or a persistent AKI during the 5 days after mechanical ventilation initiation. We studied the association between WRF and ventilatory parameters including positive end-expiratory pressure (PEEP), CVP, and leukocytes count.

Results Fifty-seven patients were included, 12 (21%) presented WRF. Daily PEEP, 5 days mean PEEP and daily CVP values were not associated with occurrence of WRF. 5 days mean CVP was higher in the WRF group compared to patients without WRF (median [IQR], 12 mm Hg [11-13] vs. 10 mm Hg [9?12]; P=0.03). Multivariate models with adjustment on leukocytes and Simplified Acute Physiology Score (SAPS) II confirmed the association between CVP value and risk of WRF (odd ratio, 1.97; 95% confidence interval, 1.12?4.33). Leukocytes count was also associated with occurrence of WRF in the WRF group (14 G/L [11?18]) and the no-WRF group (9 G/L [8?11]) (P=0.002).

Conclusions In mechanically ventilated COVID-19 patients, PEEP levels did not appear to influence occurrence of WRF. High CVP levels and leukocytes count are associated with risk of WRF.
KEYWORD
acute kidney injury, central venous pressure, COVID-19, inflammation, positive end-expiratory pressure
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