Performance of fixed-pressure valve with antisiphon device SPHERA® in hydrocephalus treatment and overdrainage prevention

• Main Authors: Fernando Campos Gomes Pinto, Renan Muralho Pereira, Felippe Saad, Manoel Jacobsen Teixeira
• Format: Article
• Language: English
• Published: Academia Brasileira de Neurologia (ABNEURO) 2012-09-01
• Series: Arquivos de Neuro-Psiquiatria
• Subjects: hidrocefalia; pseudotumor cerebral; derivações do líquido céfalorraquidiano
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2012000900011&lng=en&tlng=en

Patients with hydrocephalus and risk factors for overdrainage may be submitted to ventricular shunt (VS) implant with antisiphon device. The objective of this study was to prospectively evaluate for two years the clinical and tomographic results of the implant of fixed-pressure valves with antisiphon device SPHERA® in 35 adult patients, with hydrocephalus and risk factors for overdrainage. Of these, 3 had congenital hydrocephalus in adult patients with very dilated ventricles (Evans index >50%), 3 had symptomatic overdrainage after previous VS implant (subdural hematoma, hygroma or slit ventricle syndrome), 1 had previous chronic subdural hematoma, 15 had normal pressure hydrocephalus with final lumbar pressure <5 cm H2O after tap test (40 mL), 6 had pseudotumor cerebri, and 7 had hydrocephalus due to other causes. Clinical improvement was observed and sustained in 94.3% of the patients during the two-year period with no computed tomography (CT) evidence of hypo or overdrainage, and no immediate early or late significant complications.