{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,10]],"date-time":"2026-04-10T15:03:06Z","timestamp":1775833386694,"version":"3.50.1"},"reference-count":22,"publisher":"FapUNIFESP (SciELO)","issue":"9","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arq. Neuro-Psiquiatr."],"published-print":{"date-parts":[[2012,9]]},"abstract":"<jats:p>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\u00ae 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 &gt;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 &lt;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.<\/jats:p>","DOI":"10.1590\/s0004-282x2012000900011","type":"journal-article","created":{"date-parts":[[2012,9,15]],"date-time":"2012-09-15T11:58:25Z","timestamp":1347710305000},"page":"704-709","source":"Crossref","is-referenced-by-count":13,"title":["Performance of fixed-pressure valve with antisiphon device SPHERA\u00ae in hydrocephalus treatment and overdrainage prevention"],"prefix":"10.1590","volume":"70","author":[{"given":"Fernando Campos Gomes","family":"Pinto","sequence":"first","affiliation":[{"name":"Universidade de S\u00e3o Paulo,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Renan Muralho","family":"Pereira","sequence":"additional","affiliation":[{"name":"USP"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Felippe","family":"Saad","sequence":"additional","affiliation":[{"name":"Universidade de S\u00e3o Paulo,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Manoel Jacobsen","family":"Teixeira","sequence":"additional","affiliation":[{"name":"Universidade de S\u00e3o Paulo,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"530","reference":[{"key":"ref1","article-title":"Revisiting hydrocephalus as a model to study brain resilience","volume":"5","author":"Oliveira MF","year":"2011","journal-title":"Front Hum Neurosci"},{"key":"ref2","article-title":"The United Kingdom Shunt Registry","volume":"7","author":"O'Kane MC","year":"1997","journal-title":"Eur J Pediatr Surg","ISSN":"https:\/\/id.crossref.org\/issn\/0939-7248","issn-type":"print"},{"key":"ref3","doi-asserted-by":"crossref","DOI":"10.3171\/foc.2007.22.4.6","article-title":"Siphon regulatory devices: their role in the treatment of hydrocephalus","volume":"22","author":"Kurtom KH","year":"2007","journal-title":"Neurosurg Focus"},{"key":"ref4","doi-asserted-by":"crossref","first-page":"343","DOI":"10.1007\/3-211-30714-1_71","article-title":"Gravitational valves: relevant differences with different technical solutions to counteract hydrostatic pressure","volume":"96","author":"Kiefer M","year":"2006","journal-title":"Acta Neurochir Suppl"},{"key":"ref5","doi-asserted-by":"crossref","first-page":"614","DOI":"10.3171\/jns.2000.93.4.0614","article-title":"Posture-related changes in the pressure environment of the ventriculoperitoneal shunt system","volume":"93","author":"Kajimoto Y","year":"2000","journal-title":"J Neurosurg","ISSN":"https:\/\/id.crossref.org\/issn\/0022-3085","issn-type":"print"},{"key":"ref6","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1007\/BF00277653","article-title":"Overdrainage and shunt technology: A critical comparison of programmable, hydrostatic and variable-resistance valves and flow-reducing devices","volume":"11","author":"Aschoff A","year":"1995","journal-title":"Childs Nerv Syst","ISSN":"https:\/\/id.crossref.org\/issn\/0256-7040","issn-type":"print"},{"key":"ref7","first-page":"S49","article-title":"Shunt-technology and overdrainage-a critical review of hydrostatic, programmable and variable-resistance-valves and flow-reducing devices","volume":"1","author":"Aschoff A","year":"1991","journal-title":"Eur J Pediatr Surg","ISSN":"https:\/\/id.crossref.org\/issn\/0939-7248","issn-type":"print"},{"key":"ref8","doi-asserted-by":"crossref","first-page":"525","DOI":"10.1007\/s00701-002-0922-9","article-title":"Laboratory testing of hydrocephalus shunts: conclusion of the U.K. Shunt evaluation programme","volume":"144","author":"Czosnyka Z","year":"2002","journal-title":"Acta Neurochir (Wien)","ISSN":"https:\/\/id.crossref.org\/issn\/0001-6268","issn-type":"print"},{"key":"ref9","doi-asserted-by":"crossref","first-page":"36","DOI":"10.1016\/j.surneu.2004.03.015","article-title":"Comparison of programmable shunt valves vs standard valves for communicating hydrocephalus of adults: a retrospective analysis of 407 patients","volume":"63","author":"Ringel F","year":"2005","journal-title":"Surg Neurol","ISSN":"https:\/\/id.crossref.org\/issn\/0090-3019","issn-type":"print"},{"key":"ref10","doi-asserted-by":"crossref","first-page":"58","DOI":"10.1159\/000028988","article-title":"The delta valve: how does its clinical performance compare with two other pressure differential valves without antisiphon control?","volume":"33","author":"Davis SE","year":"2000","journal-title":"Pediatr Neurosurg","ISSN":"https:\/\/id.crossref.org\/issn\/1016-2291","issn-type":"print"},{"key":"ref11","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1007\/s00701-009-0215-7","article-title":"Gravitational shunt units may cause under-drainage in bedridden patients","volume":"151","author":"Kaestner S","year":"2009","journal-title":"Acta Neurochir (Wien)","ISSN":"https:\/\/id.crossref.org\/issn\/0001-6268","issn-type":"print"},{"key":"ref12","doi-asserted-by":"crossref","first-page":"107","DOI":"10.1007\/978-3-211-98811-4_18","article-title":"Gravitational shunt complications after a five-year follow-up","volume":"106","author":"Kiefer M","year":"2010","journal-title":"Acta Neurochir Suppl"},{"key":"ref13","doi-asserted-by":"crossref","first-page":"230","DOI":"10.1159\/000055960","article-title":"Long-term follow-up data from the Shunt Design Trial","volume":"33","author":"Kestle J","year":"2000","journal-title":"Pediatr Neurosurg","ISSN":"https:\/\/id.crossref.org\/issn\/1016-2291","issn-type":"print"},{"key":"ref14","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1186\/1743-8454-4-2","article-title":"Laboratory study on \"intracranial hypotension\" created by pumping the chamber of a hydrocephalus shunt","volume":"4","author":"Bromby A","year":"2007","journal-title":"Cerebrospinal Fluid Res"},{"key":"ref15","doi-asserted-by":"crossref","first-page":"1709","DOI":"10.1007\/s00381-011-1500-3","article-title":"Hydrocephalus in neurocysticercosis","volume":"27","author":"Matushita H","year":"2011","journal-title":"Childs Nerv Syst","ISSN":"https:\/\/id.crossref.org\/issn\/0256-7040","issn-type":"print"},{"key":"ref16","doi-asserted-by":"crossref","first-page":"1082","DOI":"10.1590\/S0004-282X2009000600023","article-title":"Treatment of colloid cysts of the third ventricle through neuroendoscopic Nd: YAG laser stereotaxis","volume":"67","author":"Pinto FC","year":"2009","journal-title":"Arq Neuropsiquiatr","ISSN":"https:\/\/id.crossref.org\/issn\/0004-282X","issn-type":"print"},{"key":"ref17","doi-asserted-by":"crossref","first-page":"103","DOI":"10.1055\/s-0029-1231080","article-title":"Simulation of endoscopic third ventriculostomy in fresh cadaveric specimens","volume":"52","author":"Romero AD","year":"2009","journal-title":"Minim Invasive Neurosurg","ISSN":"https:\/\/id.crossref.org\/issn\/0946-7211","issn-type":"print"},{"key":"ref18","doi-asserted-by":"crossref","first-page":"875","DOI":"10.3171\/jns.1992.77.6.0875","article-title":"Shunt implantation: reducing the incidence of shunt infection","volume":"77","author":"Choux M","year":"1992","journal-title":"J Neurosurg","ISSN":"https:\/\/id.crossref.org\/issn\/0022-3085","issn-type":"print"},{"key":"ref19","doi-asserted-by":"crossref","first-page":"444","DOI":"10.1159\/000172966","article-title":"Comparison of the efficacies of antibiotic-impregnated and silver-impregnated ventricular catheters on the prevention of infections: An in vitro laboratory study","volume":"44","author":"Secer HI","year":"2008","journal-title":"Pediatr Neurosurg","ISSN":"https:\/\/id.crossref.org\/issn\/1016-2291","issn-type":"print"},{"key":"ref20","doi-asserted-by":"crossref","first-page":"444","DOI":"10.3171\/PED\/2008\/1\/6\/444","article-title":"Clinical and economic consequences of antibiotic-impregnated cerebrospinal fluid shunt catheters","volume":"1","author":"Eymann R","year":"2008","journal-title":"J Neurosurg Pediatr"},{"key":"ref21","doi-asserted-by":"crossref","first-page":"930","DOI":"10.3171\/JNS\/2008\/108\/5\/0930","article-title":"Ventricular catheter trajectories from traditional shunt approaches: a morphometric study in adults with hydrocephalus","volume":"108","author":"Lind CR","year":"2008","journal-title":"J Neurosurg","ISSN":"https:\/\/id.crossref.org\/issn\/0022-3085","issn-type":"print"},{"key":"ref22","doi-asserted-by":"crossref","first-page":"949","DOI":"10.1007\/s00381-008-0591-y","article-title":"The ventriculoomental bursa shunt","volume":"24","author":"Matushita H","year":"2008","journal-title":"Childs Nerv Syst","ISSN":"https:\/\/id.crossref.org\/issn\/0256-7040","issn-type":"print"}],"container-title":["Arquivos de Neuro-Psiquiatria"],"original-title":[],"link":[{"URL":"http:\/\/www.scielo.br\/pdf\/anp\/v70n9\/v70n9a11.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2017,5,27]],"date-time":"2017-05-27T09:21:08Z","timestamp":1495876868000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.scielo.br\/scielo.php?script=sci_arttext&pid=S0004-282X2012000900011&lng=en&tlng=en"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,9]]},"references-count":22,"journal-issue":{"issue":"9","published-print":{"date-parts":[[2012,9]]}},"alternative-id":["S0004-282X2012000900011"],"URL":"https:\/\/doi.org\/10.1590\/s0004-282x2012000900011","relation":{},"ISSN":["0004-282X"],"issn-type":[{"value":"0004-282X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,9]]}}}