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Hypertonic fluid administration in patients with septic shock: a prospective randomized controlled pilot study.

Frank M P van Haren1, James Sleigh, E Christiaan Boerma

  • 1Intensive Care Department, The Canberra Hospital, Canberra, Australia. fvanharen@me.com

Shock (Augusta, Ga.)
|November 18, 2011
PubMed
Summary

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Hypertonic saline solution improved cardiac contractility and vascular tone in septic shock patients, reducing the need for fluids. Isotonic fluids did not show these benefits.

Area of Science:

  • Critical Care Medicine
  • Cardiovascular Physiology
  • Fluid Resuscitation

Background:

  • Septic shock management requires careful fluid resuscitation.
  • The comparative effects of hypertonic versus isotonic fluids on hemodynamics and cardiac function in septic shock are not fully understood.

Purpose of the Study:

  • To evaluate the short-term effects of hypertonic saline/hydroxyethyl starch versus isotonic hydroxyethyl starch on hemodynamic parameters and cardiac contractility in patients with septic shock.

Main Methods:

  • A double-blind, prospective randomized controlled trial involving 24 septic shock patients.
  • Patients received either hypertonic (7.2% NaCl/6% HES) or isotonic (6% HES) fluid resuscitation.
  • Hemodynamic monitoring included MAP, CVP, SVV, ITBVI, gastric tonometry, sublingual microcirculation, and echocardiography (TDI) for contractility.

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Main Results:

  • Hypertonic fluid administration improved the combined index of mean arterial blood pressure and norepinephrine infusion rate (log MAP/NE) and increased systolic tissue Doppler imaging velocities and stroke volume index.
  • No significant differences were observed in preload or afterload parameters between groups.
  • Hypertonic fluids reduced the requirement for ongoing fluid resuscitation without impacting gastrointestinal mucosal perfusion or sublingual microcirculatory blood flow.

Conclusions:

  • Hypertonic fluid administration, independent of preload or afterload, enhanced cardiac contractility and vascular tone in septic shock patients compared to isotonic fluids.
  • Hypertonic fluids decreased the need for further fluid resuscitation.
  • Hypertonic fluids did not improve gastrointestinal or sublingual microcirculatory blood flow.