Cardiothoracic & vascular anesthesia

Cardiopulmonary Bypass Blood Flow Rates and Major Adverse Kidney Events in Cardiac Surgery: A Propensity Score-adjusted Before–After Study

J Cardiothorac Vasc AnesthPublished Retrospective before-after observational study

Main findingResult — go to the resultOdds ratio 0.779 95% CI 0.661–0.919

Authors' conclusion

In patients undergoing cardiac surgery, increased CPB-BFR was associated with a decrease in MAKE at 30 days including mortality and renal replacement therapy.

Study context

Population
Adults undergoing elective and urgent cardiac surgery without severe chronic renal failure, cardiopulmonary bypass (CPB) duration ≥90 minutes, university hospital
Participants
533 adults
Exposure
CPB blood flow rate target >2.4 vs >2.2 L/min/m²
  • Low CPB-BFRn = 270reference
  • High CPB-BFRn = 263
Outcome
MAKE:
  • Death
  • RRT
  • Persistent renal dysfunction
Follow-up
30 days
Methodological detailssingle-centre, propensity score-adjusted
  • Single-centre
  • Propensity score-adjusted

Main finding

As reported in the abstract

Odds ratio

0.779

95% CI 0.661–0.919

P < 0.001

By group

High CPB-BFR vs low CPB-BFR
OR 0.779 (95% CI 0.661–0.919); P < 0.001

Observational data: associations, not effects.

Further findings

OutcomeLow CPB-BFRHigh CPB-BFROR (95% CI)P value
30-day mortality5%1%0.697 (0.595–0.817)P = 0.001
RRT4%1%0.739 (0.604–0.904)P = 0.016

Original publication

Cardiopulmonary Bypass Blood Flow Rates and Major Adverse Kidney Events in Cardiac Surgery: A Propensity Score-adjusted Before–After Study. J Cardiothorac Vasc Anesth. Published 11 July 2024. doi:10.1053/j.jvca.2024.07.019

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