Sciatica is a medical condition characterized by pain going down the leg from the lower back.[1] This pain may go down the back, outside, or front of the leg. Typically, symptoms are only on one side of the body. Certain causes, however, may result in pain on both sides.
respiratory quotient (RQ) the ratio of the volume of expired carbon dioxide to the volume of oxygen absorbed by the lungs per unit of time. Called also respiratory exchange ratio (above).
Definition of acute respiratory failure Acute respiratory failure is classified as hypoxemic (low arterial oxygen levels), hypercapneic (elevated levels of car-bon dioxide gas), or a combination of the two. In most cases one or the other predominates. For ICD-9, these terms, being ânonessential modifiers,â are irrelevant for code assign-ment.