Fig. 3From: Efficacy and safety of programmable compared with fixed anti-siphon devices for treating idiopathic normal-pressure hydrocephalus (iNPH) in adults – SYGRAVA: study protocol for a randomized trialPressure-flow curves of the adjustment settings of the Codman CERTAS plus valve® (a) and of the Medtronic PS Medical STRATA II® valve (b) modified according to (a) Codman CERTAS plus brochure DSUS/COD/1214/0229a 01/15 and (b) Medtronic PS Med STRATA II instructions for use 16,417-1H 30,329Back to article page