• Neurosurgery · Jul 2020

    Shunt Failure-The First 30 Days.

    • Ryan P Lee, Sonia Ajmera, Fridtjof Thomas, Pooja Dave, Jock C Lillard, David Wallace, Austin Broussard, Mustafa Motiwala, Sebastian P Norrdahl, Garrett T Venable, Nickalus R Khan, Camden Harrell, Tamekia L Jones, Brandy N Vaughn, Tim Gooldy, David S Hersh, and Paul Klimo.
    • Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.
    • Neurosurgery. 2020 Jul 1; 87 (1): 123-129.

    BackgroundIncontrovertible predictors of shunt malfunction remain elusive.ObjectiveTo determine predictors of shunt failure within 30 d of index surgery.MethodsThis was a single-center retrospective cohort study from January 2010 through November 2016. Using a ventricular shunt surgery research database, clinical and procedural variables were procured. An "index surgery" was defined as implantation of a new shunt or revision or augmentation of an existing shunt system. The primary outcome was shunt failure of any kind within the first 30 days of index surgery. Bivariate models were created, followed by a final multivariable logistic regression model using a backward-forward selection procedure.ResultsOur dataset contained 655 unique patients with a total of 1206 operations. The median age for the cohort at the time of first shunt surgery was 4.6 yr (range, 0-28; first and third quartile, .37 and 11.8, respectively). The 30-day failure rates were 12.4% when analyzing the first-index operation only (81/655), and 15.7% when analyzing all-index operations (189/1206). Small or slit ventricles at the time of index surgery and prior ventricular shunt operations were found to be significant covariates in both the "first-index" (P < .01 and P = .05, respectively) and "all-index" (P = .02 and P < .01, respectively) multivariable models. Intraventricular hemorrhage at the time of index surgery was an additional predictor in the all-index model (P = .01).ConclusionThis study demonstrates that only 3 variables are predictive of 30-day shunt failure when following established variable selection procedures, 2 of which are potentially under direct control of the surgeon.Copyright © 2019 by the Congress of Neurological Surgeons.

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