Significance of Results
| Result | Interpretation | Significance |
|---|---|---|
| Normal | No perfusion deficit | Excludes pulmonary thromboembolism |
| Low probability | Perfusion deficit with matched ventilation deficit | < 20% probability of PE |
| Intermediate probability | Perfusion deficit that corresponds to parenchymal abnormality on chest x-ray | 20% - 80% probability of PE |
| High probability | Multiple segmental perfusion deficits with normal ventilation | > 80% probability of PE |
Decreased uptake of the inhaled radioisotope may indicate an impaired ability to breathe, airway obstruction, or possible pneumonia.
Decreased circulation of the injected MAA indicates a problem with blood flow into or within the lungs. A localized area of decreased uptake, usually in a wedge shaped (or pie shaped) configuration with normal ventilation images (mismatched defect) suggests a pulmonary embolus or blood clot in the lungs, which leads to reduced perfusion.
Read more about this topic: Ventilation/perfusion Scan
Famous quotes containing the words significance of, significance and/or results:
“I am not afraid that I shall exaggerate the value and significance of life, but that I shall not be up to the occasion which it is.”
—Henry David Thoreau (1817–1862)
“To grasp the full significance of life is the actor’s duty, to interpret it is his problem, and to express it his dedication.”
—Marlon Brando (b. 1924)
“The chief benefit, which results from philosophy, arises in an indirect manner, and proceeds more from its secret, insensible influence, than from its immediate application.”
—David Hume (1711–1776)