Internal Jugular Vein Flow | Arterial Flow | |||
---|---|---|---|---|
Unrestricted Flow | Jugular Compression | Unrestricted Flow | Jugular Compression | |
Mean vessel area (cm2) | ||||
Mean | 1.17 ± 0.54 | 0.70 ± 0.35 | 1.0 ± 0.77 | 0.97 ± 0.68 |
Range | 0.40–2.18 | 0.29–1.41 | −0.99–1.53 | −0.76–1.56 |
t test | t = 3.56, P = .005a | t = 0.51, P = .604 | ||
Mean flow rate (mL/min) (caudal flow for venous flow, cranial for arterial) | ||||
Mean | 572.2 ± 219.7 | 460.8 ± 202.4 | 814.7 ± 221.9 | 815.3 ± 290.6 |
Range | 153.8–862.2 | 135–726.4 | 268–989.2 | 127.7–1070 |
t test | t = 2.85, P = .008a | −0.01, P = .989 | ||
Flow-rate amplitude (mL/min) | ||||
Mean | 974.1 ± 523.6 | 382.6 ± 312.7 | 1803.8 ± 490.1 | 1720.6 ± 688.4 |
Range | 198.5–1838.8 | 56.8–1069.0 | 601.4–2290.2 | 282.8–2721.4 |
t test | t = 3.75, P = .002a | t = 0.58, P = .558 |
↵a P < .05, paired t test.