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Suspended animation for delayed resuscitation.

Peter J Safar¹, Samuel A Tisherman

¹Safar Center for Resuscitation Research, University of Pittsburgh School of Medicine and Medical Center, Pittsburgh, PA 15260, USA. safarp@anes.upmc.edu

Current Opinion in Anaesthesiology

|October 5, 2006

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Suspended animation, a novel approach, preserves brain viability during cardiac arrest, offering a critical window for resuscitation. This method shows promise for trauma victims and sudden cardiac death, potentially improving survival rates.

Area of Science:

Medical Science
Emergency Medicine
Physiology

Background:

Traumatic exsanguination cardiac arrest presents a critical window for resuscitation.
Current resuscitation methods are insufficient for certain cardiac arrest scenarios, including severe trauma.
Preserving organ viability during cardiac arrest is crucial for successful resuscitation.

Purpose of the Study:

To introduce and explore the concept of 'Suspended Animation for Delayed Resuscitation' (SADR).
To evaluate the efficacy of SADR in preserving brain and organism viability during cardiac arrest.
To determine the optimal timing and methods for inducing suspended animation in trauma patients.

Main Methods:

Review of historical studies on suspended animation in canine models.

Related Experiment Videos

Analysis of hypothermic techniques, including cardiopulmonary bypass and saline flush, for inducing hypothermia.

Comparison of hypothermic strategies with pharmacologic approaches.

Main Results:

Suspended animation demonstrated effectiveness in dogs, enabling long-term survival without brain damage after prolonged cardiac arrest.
Hypothermic saline flush and cardiopulmonary bypass were superior to pharmacologic strategies in canine studies.
Survival without brain damage was achieved in dogs after up to 90 minutes of cardiac arrest at 10°C brain temperature.

Conclusions:

Suspended animation is a viable strategy for preserving viability during cardiac arrest, particularly in traumatic exsanguination.
Early induction of suspended animation within 5 minutes of cardiac arrest is critical for trauma victims.
Further research in large animals is necessary to translate these findings to human clinical applications, especially for sudden cardiac death victims.