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Base deficit as a sensitive indicator of compensated shock and tissue oxygen utilization
J W Davis1, S R Shackford, T L Holbrook
1Department of Surgery, University of California, San Diego Medical Center.
Surgery, Gynecology & Obstetrics
|December 1, 1991
Summary
Arterial base deficit (BD) effectively indicates hemorrhagic shock severity and resuscitation effectiveness. This finding is crucial for patient monitoring when invasive methods are unavailable.
Area of Science:
- Critical Care Medicine
- Physiology
- Surgical Research
Background:
- Hemorrhagic shock poses significant clinical challenges.
- Accurate assessment of shock severity and resuscitation efficacy is vital.
- Existing monitoring methods can be invasive or impractical.
Purpose of the Study:
- To investigate the relationship between arterial base deficit (BD) and key physiologic indicators of shock.
- To evaluate BD's utility in assessing hemodynamic and tissue perfusion changes during hemorrhage and resuscitation.
- To determine if BD can serve as a reliable indicator when invasive monitoring is not feasible.
Main Methods:
- Invasive monitoring of hemodynamic parameters in 16 swine.
- Induction of 40% blood volume hemorrhage.
- Resuscitation using crystalloid and blood products.
- Analysis of arterial base deficit, heart rate, MAP, CO, AVO2, VSAT, and RATIO.
Main Results:
- Hemorrhage led to decreased MAP, CO, VSAT, and RATIO, with increased BD and AVO2.
- Compensated shock showed BD reflecting volume deficit better than other variables.
- Resuscitation normalized all monitored parameters.
- BD accurately mirrored hemodynamic and perfusion changes during shock and recovery.
Conclusions:
- Arterial base deficit is a reliable indicator of hemorrhagic shock severity.
- BD effectively assesses resuscitation efficacy, especially when invasive monitoring is limited.
- BD provides valuable insights into tissue perfusion and volume status during critical illness.