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Daily bibliographic review of the Neurosurgery Department. La Fe University Hospital. Valencia, Spain

Shunt age-related complications in adult patients with suspected shunt dysfunction

Acta Neurochir (2017) 159:1421–1428

Patients admitted for suspicion of shunt dysfunction (SD) often show unspecific symptoms and require timeconsuming, expensive and even invasive diagnostics involving significant radiation exposure. The purpose of this retrospective study was to analyse the current diagnostic procedures and to propose a process optimisation.

Method: As all patients admitted for suspicion of SD receive imaging studies, we searched for adult patients receiving neuroimaging in the period from January 2010 to July 2013, analysing referring diagnosis, clinical signs, products, diagnostic process and final diagnosis. Recursive partitioning was used to define time intervals for differentiating types of SD.

Results A total of 148 patients, aged 18–89 (mean, 54) years, were studied. Forty-two percent were referred by a hospital or rehabilitation centre, 30% by general practitioners and 24% were self-referrals. The admission diagnosis was in the majority “shunt dysfunction” only. Further differentiations were rarely made. An SD was confirmed in 46% of the patients. In 17%, the symptoms were based on another cause and in 37% they could not be clearly attributed to any specific disorder. Abdominal dislocations (2%) and shunt infections (5%) were found within the first 6 months. Over- (3%) and underdrainage (14%) were the most frequent complications during the first 4 years. Disconnections (13%) occurred generally 4 years or more after implantation. Only shunt obstruction (9%) showed no temporal pattern.

Conclusions: Symptoms of SD remain mostly unspecific. This study showed that the type of SD depends on the time interval from implantation.We propose a workup strategy for patients with SD based on the temporal profile.

Category: CSF disorders, hydrocephalus

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