Perioperative medicine & outcomes
Bioimpedance spectroscopy fluid analysis in acute high-risk abdominal surgery, a prospective clinician-blinded observational feasibility study
Authors' conclusion
We have demonstrated the feasibility of obtaining perioperative bedside BIA measurements in patients undergoing AHA surgery. BIA measurements correlated with fluid balance, weight changes, and postoperative clinical complications.
Study context
- Population
- Patients undergoing acute high-risk abdominal (AHA) surgery365 BIA measurements
- Participants
- 73 patients
- Outcome
- Feasibility of hydration status and fluid distribution assessment by bioimpedance spectroscopy analysis (BIA)
Methodological detailsclinician-blinded, BIA measurements over 0-120 h; hydration classified by relative fluid overload (RFO): dehydrated (RFO < - 10%), normohydrated (- 10% ≤ RFO ≤ + 15%), overhydrated (RFO > 15%)
- Clinician-blinded
- BIA measurements over 0-120 h; hydration classified by RFO: dehydrated (RFO < - 10%), normohydrated (- 10% ≤ RFO ≤ + 15%), overhydrated (RFO > 15%)
Main finding
As reported in the abstract
BIA-assessed hydration status and correlation with fluid balance
Preoperative overhydration (RFO > 15%)
16%
Overhydration by POD 5
66%
Correlation of change in BIA absolute fluid overload (AFO) with cumulative fluid balance
r2 = 0.44
p < .001
Correlation of change in BIA AFO with change in weight
r2 = 0.55
p < .0001
Observational data: associations, not effects.
Further findings
Clinical outcome by perioperative hydration status
- Perioperative overhydration associated with worse outcome vs normo- or dehydration
Original publication
Bioimpedance spectroscopy fluid analysis in acute high-risk abdominal surgery, a prospective clinician-blinded observational feasibility study. J Clin Monit Comput. Published 4 November 2022. doi:10.
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