Cardiothoracic & vascular anesthesia

Use of Bioimpedance Spectroscopy for Postoperative Fluid Management in Patients Undergoing Cardiac Surgery with Cardiopulmonary Bypass

J Cardiothorac Vasc AnesthPublished Observational study

Authors' conclusion

BIA measurements in postoperative cardiac surgery patients may be a valuable tool to quantitatively determine fluid status to help guide fluid management in this patient population.

Study context

Population
Patients undergoing cardiac surgery with CPB able to undergo BIA measurements, June–November 2023
Outcome
Correlations of BIA-measured ECF and TBW volumes with daily weight changes and 24-hour net fluid I/O
Methodological detailssingle-centre
  • Single-centre

Main finding

As reported in the abstract

Daily extracellular fluid (ECF) volume changes correlated with daily weight changes
p < 0.01
Daily ECF volume changes correlated with 24-hour I/O
p < 0 .01
Total body water (TBW) volume correlated with daily weight changes
p < 0.01
TBW volume correlated with 24-hour I/O
p = 0.04
Daily weight changes did not correlate with 24-hour I/O
p = 0.06

Observational data: associations, not effects.

Further findings

Predischarge Pro-BNP by predischarge ECF%TBW(%) ≥51 vs <51

Significantly higher predischarge Pro-BNP with ECF%TBW(%) ≥51
P < 0.01

HF revisits or readmissions after discharge

Higher predischarge ECF%TBW(%) in patients with HF revisits or admissions vs without
P = 0.01

Original publication

Use of Bioimpedance Spectroscopy for Postoperative Fluid Management in Patients Undergoing Cardiac Surgery with Cardiopulmonary Bypass. J Cardiothorac Vasc Anesth. Published 6 August 2024. doi:10.1053/j.jvca.2024.08.003

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