Key result
Intravenous volume expansion with a crystalloid fluid bolus significantly increased the median diastolic common carotid artery diameter by 5.0% in mechanically ventilated patients after cardiac surgery.
Why the study?
Does intravenous volume expansion increase the diameter of the common carotid artery in mechanically ventilated patients after cardiac surgery?
Observational (n=20)
No
Does intravenous volume expansion increase the diameter of the common carotid artery in mechanically ventilated patients after cardiac surgery?
Effect estimate: 5.0% increase
Absolute Event Rate: 6.7% vs 6.2%
p-value: p=0.03
The common carotid artery diameter significantly increases in response to intravenous volume expansion in mechanically ventilated patients, and this dilation correlates with improvements in hemodynamic parameters.
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Carotid diameter response to volume may aid hemodynamic assessment; hypothesis-generating and requires randomized validation before practice change.
Hilbert et al. (2016) conducted an observational in Intravascular fluid depletion after cardiac surgery (n=20). Intravenous volume expansion (crystalloid infusion solution) vs. Baseline (before fluid administration) was evaluated on Diastolic common carotid artery (CCA) diameter in mm (5.0% increase, p=0.03). Intravenous volume expansion with a crystalloid fluid bolus significantly increased the median diastolic common carotid artery diameter by 5.0% in mechanically ventilated patients after cardiac surgery.
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