tayagg.blogg.se - Ct doppler

Doppler: 55% sensitive and 87% specific.

Cystic mass, particularly > 5cm in diameter.

Multiple peripheral cortical follicles with transudative fluid.

Ovarian diameter 2.3x larger than contralteral diameter.

Ovarian volume 12x larger than contralateral volume, or 75 mL absolute ovarian volume.

Enlarged heterogenous ovary (compared to contralateral normal ovary).

Some of the morphologic features reviewed:.

Morphologic features: 92% sensitive and 96% specific.

Regarding morphologic and Doppler criteria on ultrasound for the diagnosis of ovarian torsion, this study found:

A meta-analysis ( Eur J Pediatr Surg 2015 25:82-86) looked at different modalities in diagnosing ovarian torsion in pediatric patients.

Normal arterial and venous flow in 7% cases.Decreased arterial and venous flow in 13% cases.

No arterial flow, decreased venous flow in 33% cases.No venous flow, decreased arterial flow in 7% cases.No arterial or venous flow in 40% of cases.One study ( J Ultrasound Med 2001 20:1083-1089) evaulated the use of Doppler in pathologic proven cases of ovarian/adnexal torsion and found:.Even if there is ovarian flow on Doppler imaging, there can still be torsion.The absense of ovarian flow suggests necrosis.The presence of (or decrease in) arterial/venous flow predicts a better outcome.Round/'full' ovary with a central 'ground glass' appeaerance.Eccentric mass (usually a cyst) serving as a lead point.Torsion of both the ovary and fallopian tube occurs more often than that of either structure alone.This results in lymphatic and venous congestion, inturn limiting arterial inflow Ovarian/adnexal torsion is caused by complete or partial rotation of the ovarian pedicle on its long axis.False Perpetuation: After a normal CT for lower abdominal or pelvic pain, an ultrasound with color Doppler is necessary to "rule out ovarian torsion".