PT 810 Compression Therapy Practice Test

The main idea is understanding how medical-grade compression stockings are classified by pressure to match the severity of venous disease. Pressure is measured in millimeters of mercury (mmHg) and applied most at the ankle, then tapers up the leg to create a gradient that helps push blood back toward the heart. The standard four-class labeling uses: Class I 15-20 mmHg, Class II 20-30 mmHg, Class III 30-40 mmHg, and Class IV 40-50 mmHg. This set of ranges is widely taught and used because it provides clear, progressively stronger levels of compression for different clinical needs: mild symptoms or prevention with Class I, moderate symptoms or edema with Class II, more significant edema or venous issues with Class III, and more severe cases (often requiring medical supervision) with Class IV. Other options don’t fit the common labeling because their ranges don’t align with these widely used thresholds, making the listed set the best match for typical venous disease management.