Fig. 17.1 Variability of measurements of PSV by three ICAVL-accredited technologists from an in vitro flow model In a clinical study, the interobserver variability of measurements of PSV from the…
Fig. 1.1 American Registry for Diagnostic Medical Sonography (ARDMS) , incorporated 1975 Registered Vascular Technologists (RVTs) currently number 31,000, the majority of whom are registered in another specialty as well…
Fig. 5.1 (a) Velocity curve (Doppler spectrum) from posterior tibial artery at rest illustrating how flow velocity is high during systole but low or zero during diastole. Notice the steep…
Fig. 16.1 (a) Spencer technologies headgear that is utilized for securing the transcranial Doppler probe for periprocedural imaging. The torque device in the front is for tightening the harness depending…
Fig. 46.1 CEAP classification system The CEAP clinical classification score can then be more precisely defined by Duplex ultrasound (DU) imaging of the superficial, deep, and perforator veins in the…
Fig. 39.1 Calf venous pressure–volume curve . Pressure in the normal limb is low (A) but is elevated in the limb with acute deep venous thrombosis (A′). Inflating the thigh…
Fig. 22.1 Normal arterial velocity tracing (multiphasic). (a = systolic component; b = early diastolic component; c = late diastolic component) Therefore, there are several types of Doppler velocimetry: 1….
Variable Mean Median SD Min. Max. P value Celiac PSV ≥50 native stenosis ≥50 stenting stenosis 379 447 335 428 149.7 158.4 52 205 880 903 0.0670 Celiac EDV ≥50…
Fig. 55.1 Image demonstrating placement of the sensor over the right foot to measure the tcpO2 skin level TcpO2 monitoring is completely noninvasive and atraumatic. It is recommended that sensor…
Fig. 28.1 Low-velocity monophasic flow in the common femoral artery distal to the occluded common iliac artery (PSV 31.4 cm/s, EDV 10.1 cm/s) Patency and obstruction of the iliac arteries…
