Increased resistance developing in Holter valves.
D002555:Cerebrospinal Fluid; D002648:Child; D002675:Child, Preschool; D006801:Humans; D006849:Hydrocephalus / Q000601:surgery*; D007223:Infant; D007427:Intracranial Pressure; D008297:Male; D008722:Methods / Q000009:adverse effects; D014656:Vascular Surgical Procedures / Q000009:adverse effects*