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Assessment of Vascular Tone Responsiveness using Isolated Mesenteric Arteries with a Focus on Modulation by Perivascular Adipose Tissues
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Dynamic arterial elastance predicts mean arterial pressure decrease associated with decreasing norepinephrine dosage

Pierre-Grégoire Guinot1, Eugénie Bernard2, Mélanie Levrard3

  • 1Department of Anaesthesiology and Critical Care, Amiens University Hospital, Place Victor Pauchet, Amiens, 80054, France. guinotpierregregoire@gmail.com.

Critical Care (London, England)
|January 20, 2015
PubMed
Summary
This summary is machine-generated.

Dynamic arterial elastance (Eadyn) can predict arterial pressure drops when reducing norepinephrine in sepsis patients. This finding offers a bedside tool for safely managing vasopressor dosage in intensive care settings.

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Area of Science:

  • Critical care medicine
  • Hemodynamics
  • Septic shock management

Background:

  • Norepinephrine (NE) dosage reduction in septic shock is physician-dependent, lacking bedside predictive indicators.
  • Dynamic arterial elastance (Eadyn), a ratio of respiratory variations, is proposed to assess vascular tone.

Purpose of the Study:

  • To evaluate if Eadyn can predict mean arterial pressure (MAP) decrease during NE dosage reduction in sepsis patients.
  • To determine Eadyn's utility as a functional hemodynamic indicator for NE weaning.

Main Methods:

  • Prospective study in an ICU involving 35 sepsis patients undergoing NE dosage reduction.
  • Hemodynamic variables, including Eadyn and MAP, were measured before and after NE reduction.
  • Responders were defined as a >15% decrease in MAP.

Main Results:

  • 37% of patients experienced a MAP decrease >15% after NE reduction.
  • Lower baseline Eadyn was observed in responders compared to non-responders (0.75 vs. 1, P<0.05).
  • Eadyn < 0.94 predicted NE-induced MAP decrease with 100% sensitivity and 68% specificity (AUC 0.87).

Conclusions:

  • Eadyn may serve as a reliable bedside indicator to predict arterial pressure changes upon NE reduction in sepsis.
  • This functional assessment tool can aid clinicians in identifying patients suitable for NE dose de-escalation.