Internal jugular venous flow measurement by means of a duplex scanner.

Abstract

Using a special probe holder, cross-sectional area and time-averaged mean spatial velocity of the internal jugular vein were measured by means of a duplex scanner and multiplied to calculate volume flow. In a cohort of 100 subjects ages 21 to 70 years, average right plus left flow was 740 ± 209 mlfmin. Flow was 8.7% lower in females than in males. Normalization of flow to 100 g I n an earlier paper 1 we proposed a method for ultrasonically assessing internal jugular venous flow (IJVF) through multiplication of mean cross-sectional area by time-averaged mean spatial velocity. With this technique area measurement was made using the planimetric system of a linear array scanner and velocity measurement by means of a single-gated pulsed wave Doppler device. A double-beam technique originally described by Peronneau et al 2 was used for angle determination.The present study was undertaken to find out whether the determination of IJVF based on ultrasonic area and velocity measurement could alternatively be accom· plished by means of a commercially available duplex scanner and, if so, how the values obtained compared with those measured with our earlier technique. It was anticipated that with such a method IJVF could be noninvasively investigated on a broader base, including pa· tients having cerebrovascular pathology.

No cerebrocervical venous congestion in patients with multiple sclerosis

“…The high percentage of BVF in the IJVs (as a proportion of the global CBF) of 79% further underpins unrestricted drainage via these veins. 17,19,47 Third, in only 4 patients included in our study did we not detect any blood flow in the VVs, whereas in all patients at least low BFV and BVF were detectable in the IJVs. Zamboni and coworkers did not detect any flow in 52% of the patients' IJVs and/or VVs.…”

Extrajugular pathways of human cerebral venous blood drainage assessed by duplex ultrasound

“…The presented VBVF measurements are in good agreement with previously obtained ultrasound data. Different research groups found a combined mean IJV flow of 740 Ϯ 209 and 700 Ϯ 270 ml/min (14,23) and a mean VV flow of 40 Ϯ 20 ml/min (23) in the supine body position. The accessible total mean venous outflow of 766 Ϯ 226 ml/min in our group of healthy volunteers corresponds well with ultrasound assessed global arterial inflow, which has been reported within the range of ϳ500-950 ml/min (18)(19)(20) and with a mean value of 727 Ϯ 102 ml/min for subjects aged 20-39 yr (17).…”

“…Ultrasound assessment of VBVF. In the midcervical region, IJVs and VVs are easily accessible by duplex ultrasound (11,13,14,23). The presented VBVF measurements are in good agreement with previously obtained ultrasound data.…”

“…Insonation was carried out in a head straight and supine body position at a midcervical level during normal breathing of the probands. VBVF was calculated as described previously (13,14,20,23) by multiplication of vessel area and time-averaged velocity (mean of all frequencies over two to three heart cycles) by using the HP Sonos 5500 software (Fig. 1).…”

Intracranial Nonjugular Venous Pathways: A Possible Compensatory Drainage Mechanism

“…11 Quantification of jugular and nonjugular venous vessels has focused mainly on extracranial venous flow measurements. [12][13][14] The deep regions of the intracranial nonjugular venous system are difficult to visualize. Subsequently, study and quantization of this additional system have been reportedly sparse.…”