Introduction - Intensive Care: Where Are We?

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Abstract
If intensive care is defined as close observation of critically ill persons, then its use is ancient indeed, going back to the beginning of recorded history. But if intensive care is defined to include all the modern technology, techniques, knowledge, and skilled personnel that closely monitor patients with the intent to intervene when potentially dangerous changes in physiology occur, usually in acute, life-threatening circumstances, then real medical intensive care services are only slightly more than three decades old.