Cardiothoracic & vascular anesthesia

Mitochondrial oxygenation monitoring and acute kidney injury risk in cardiac surgery: A prospective cohort study

J Clin AnesthPublished Prospective cohort study

Authors' conclusion

This study highlighted the association between mitoPO2 and the onset of CSA-AKI. Extended durations below the mitoPO2 threshold of 25 mmHg significantly correlate with an elevated CSA-AKI risk.

Study context

Population
Cardiac surgery patients with an increased preoperative cardiac surgery-associated acute kidney injury (CSA-AKI) risk
Participants
75 patients
Exposure
CSA-AKI vs No CSA-AKI
Outcome
Prolonged periods of intraoperative mitoPO2 < 20 mmHg in patients who developed CSA-AKI
Follow-up
During surgery
Methodological detailsprospective observational
  • Prospective observational

Main finding

As reported in the abstract

Intraoperative time with mitoPO2 <20 mmHg
  • Significantly longer intraoperative time with mitoPO2 <20 mmHg in patients who developed CSA-AKI

Observational data: associations, not effects.

Further findings

Intraoperative time with mitoPO2 <25, <30, <35 and <40 mmHg

Significantly longer in patients who developed CSA-AKI at all thresholds

Association of time below mitoPO2 <25 mmHg with CSA-AKI risk

<25 mmHg threshold showed the highest significant OR among thresholds; each minute below <25 mmHg increased CSA-AKI risk by
0.7 %
  • P = 0.021

Original publication

Mitochondrial oxygenation monitoring and acute kidney injury risk in cardiac surgery: A prospective cohort study. J Clin Anesth. Published 9 December 2024. doi:10.1016/j.jclinane.2024.111715

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