ST. LOUIS (AP) — For surgery patients who appear sedated but are awake for their operation, the consequences can be serious.

Researchers in St. Louis say a common method used to prevent what’s known as anesthesia awareness should be re-examined.

The St. Louis Post-Dispatch reports that between one in 500 and one in 1,000 surgery patients remember pain, feeling paralyzed or hearing something stressful. Some need psychological help or even develop post-traumatic stress disorder.

Researchers from Washington University School of Medicine and two other universities looked at prevention methods in 6,000 high-risk surgical patients. They found that a device that monitors brain activity known as the bispectral index does little to ensure against anesthesia awareness.

Copyright 2011 The Associated Press


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