In vitro performance of six combinations of adjustable differential pressure valves and fixed anti-siphon devices with and without vertical motion

ConclusionIn an experimental setup, all valve combinations effectively counteracted the siphon effect in the vertical position according to their added resistance. Motion-induced increased flow was consistently demonstrated in combinations of DP valve and SA. The combination of HM and SA especially showed relevant motion-induced flow already at low DPs. In combinations of DP and SG, the pattern of the motion induced flow was more inconsistent and motion even led to significant flow reduction, predominantly at DPs of 10 and 20 cmH2O.
Source: Acta Neurochirurgica - Category: Neurosurgery Source Type: research