Gravitational valves: relevant differences with different technical solutions to counteract hydrostatic pressure

Kiefer, M.; Meier, Ullrich; Eymann, Regina

doi:10.1007/3-211-30714-1_71

Cited by 8 publications

(1 citation statement)

References 17 publications

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“…To reduce overdrainage, the choice of the fixed-pressure valve opening pressure should be appropriate for the patient to ensure the necessary CSF flow to treat the hydrodynamic disorder, however without causing excessive drainage and symptomatic intracranial hypotension [2][3][4][5][6] . The programmable valves offer the possibility of adjustment after surgery without the need for reoperation.…”

Section: Discussionmentioning

confidence: 99%

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

Pinto

Pereira

Saad

et al. 2012

Arq. Neuro-Psiquiatr.

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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.

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Section: Discussionmentioning

confidence: 99%