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Table 2 Peak venous flow velocities, venous diameters, and peak blood flow volumes per second of Pop.V and CFV

From: Hemodynamic effects of electrical muscle stimulation in the prophylaxis of deep vein thrombosis for intensive care unit patients: a randomized trial

  Control (n = 66) EMS (n = 93)
At rest During EMS
Peak venous flow velocity (cm/s)
 Right Pop.V 15.3 (11.3–26.0) 10.2 (7.6–14.0)# 24.3 (15.1–40.8)*#
 Left Pop.V 13.3 (10.4–21.0) 10.9 (8.2–16.4) 24.9 (15.4–36.4)*#
 Right CFV 20.4 (15.8–27.0) 16.3 (11.9–24.8) 25.1 (17.0–32.6)*
 Left CFV 20.6 (16.2–28.6) 17.3 (13.8–23.3) 23.0 (18.2–34.3)*
Venous diameter (mm)
 Right Pop.V 6.8 (6.0–7.7) 6.9 (6.1–8.0) 7.3 (6.1–7.8)
 Left Pop.V 6.9 (6.6–7.8) 7.0 (6.0–7.8) 7.2 (6.2–8.0)
 Right CFV 11.0 (10.0–12.8) 10.2 (8.6–11.7)# 10.3 (9.2–11.7)
 Left CFV 11.0 (9.8–12.7) 10.4 (9.2–12.0) 10.2 (8.9–12.0)
Blood flow volume (cm3/s)
 Right Pop.V 5.5 (3.6–9.0) 4.0 (2.5–7.2) 9.3 (5.3–14.7)*#
 Left Pop.V 5.2 (3.4–8.2) 4.7 (2.9–7.2) 8.4 (5.5–16.9)*#
 Right CFV 20.0 (12.4–35.0) 12.8 (9.4–19.6)# 20.8 (12.2–32.3)*
 Left CFV 19.0 (12.7–35.4) 13.0 (10.7–22.4)# 20.9 (12.4–37.3)*
  1. Abbreviations: CFV common femoral vein, EMS electrical muscle stimulation, Pop.V popliteal vein
  2. Values are presented as median (IQR)
  3. *Statistical difference compared with at rest in the EMS group patients (p < 0.05)
  4. #Statistical difference compared with control patients (p < 0.05)