postductal

From post- +‎ ductal.

postductal (not comparable)

1. (anatomy) Distal to or downstream of a ductus (for example, the ductus arteriosus).
   • 2013, Jacob Mandell, Core Radiology: A Visual Approach to Diagnostic Imaging (Cambridge Medicine)‎^[1], →ISBN, page 769:

     Aortic coarctation is congenital focal narrowing of the aorta in the region of the ductus arteriosus. It may be preductal (proximal to the ductus, illustrated on the right [in the original]), periductal, or postductal.

• periductal
• preductal