1. The grade for each right and left transverse-sigmoid conduit is determined separately. The highest degree of stenosis from the torcula through to the distal sigmoid sinus determines the score on each side. 2. The sum of the right and left provides the CCS and thus ranges from 0-8, and is often expressed as a sum (e.g. 2 + 4). 3. The suggested cutoff to define significant stenosis is a score of 4. 4. A combined conduit score can identify patients with idiopathic intracranial hypertension with a sensitivity and specificity of ~93%