Polyhydramnios: a warning sign in the prenatal ultrasound diagnosis of foetal malformation?
Polyhydramnios is a highly sensitive and specific sign for prenatal diagnosis of foetal malformation. If it is identified, then this should lead to a very careful search for foetal malformation.
Similar to patients with glaucoma, individuals with ODD have low blood flow velocities in the vessels around the optic nerve head. Unlike patients with glaucoma, however, their CRA's blood flow velocity patterns correlate with the extent of the visual field defects.