Which Doppler finding is commonly associated with ovarian torsion?

• A. Decreased or absent Doppler flow to the ovary
• B. Normal Doppler flow
• C. Increased arterial flow
• D. Increased venous flow

Answer: (A)

Ovarian torsion twists the blood supply to the ovary, so Doppler ultrasound is used to assess flow. The twisting mainly blocks the venous outflow first, causing ovary congestion, and as the twist persists, arterial inflow is compromised as well. This pattern leads to decreased or absent Doppler signals in the affected ovary, which is the most common finding. Keep in mind that early or intermittent torsion can sometimes show preserved arterial flow, so a normal Doppler doesn’t completely rule it out, but the classic association is reduced or absent flow. Increased arterial or venous flow would point away from torsion and toward inflammatory or hyperemic processes.