Reactive hyperemia increases forearm vein area.

摘要: To determine the effect of reactive hyperemia on human forearm vein area. After obtaining ethics approval and informed consent, an automatic tourniquet was applied to forearms 20 healthy subjects for one, two, three minutes, at pressures 25 mmHg, 200 then mmHg. A blinded radiographer measured cross-sectional area cephalic wrist using ultrasonography. Measurements were recorded prior application every minute thereafter ten each pressure setting time interval. The mean (mm2) increased from 8.22 ± 3.09 10.77 3.50 after one ischemia, 8.31 2.78 10.61 2.77 two minutes 8.39 3.34 10.94 3.46 ischemia (P < 0.05 all). inflated mmHg 13 min produced a 10.71 3.25 mm2. Reactive causes increase. low will also increase area, but veins dilate more quickly during hyperemia. This may have important clinical implications attempting venous cannulation in patients with difficult access.