title: Chiari-related hydrocephalus: assessment of clinical risk factors in a cohort of 297 consecutive patients.
abstract: OBJECTIVE Patients treated for Chiari I malformation (CM-I) with posterior fossa decompression (PFD) may occasionally and unpredictably develop postoperative hydrocephalus. The clinical risk factors predictive of this type of Chiari-related hydrocephalus (CRH) are unknown. The authors' objective was to evaluate their experience to identify risk factors that may predict which of these patients undergoing PFD will develop CRH after surgery. METHODS The authors performed a retrospective clinical chart review of all patients who underwent PFD surgery and duraplasty for CM-I at the Primary Children's Hospital in Utah from June 1, 2005, through May 31, 2015. Patients were dichotomized based on the need for long-term CSF diversion after PFD. Analysis included both univariate and multivariable logistic regression analyses. RESULTS The authors identified 297 decompressive surgeries over the period of the study, 22 of which required long-term postoperative CSF diversion. On multivariable analysis, age < 6 years old (OR 3.342, 95% CI 1.282-8.713), higher intraoperative blood loss (OR 1.003, 95% CI 1.001-1.006), and the presence of a fourth ventricular web (OR 3.752, 95% CI 1.306-10.783) were significantly associated with the need for long-term CSF diversion after decompressive surgery. CONCLUSIONS Younger patients, those with extensive intraoperative blood loss, and those found during surgery to have a fourth ventricular web were at higher risk for the development of CRH. Clinicians should be alert to evidence of CRH in this patient population after PFD surgery.
authors: Division of Pediatric Neurosurgery, Department of Neurosurgery, Primary Children's Hospital, University of Utah, Salt Lake City, Utah; and.
authors: Jian
authors: J
authors: Guan
authors: Department of Clinical Neurosciences, Foothills Medical Centre, University of Calgary, Alberta, Canada.
authors: Jay
authors: J
authors: Riva-Cambrin
authors: Division of Pediatric Neurosurgery, Department of Neurosurgery, Primary Children's Hospital, University of Utah, Salt Lake City, Utah; and.
authors: Douglas L
authors: DL
authors: Brockmeyer
mesh_terms: D000293:Adolescent; D001139:Arnold-Chiari Malformation / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery*; D002557:Cerebrospinal Fluid Shunts / Q000639:trends; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D005260:Female; D020546:Fourth Ventricle / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D006849:Hydrocephalus / Q000000981:diagnostic imaging* / Q000209:etiology; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011183:Postoperative Complications / Q000000981:diagnostic imaging* / Q000209:etiology; D012189:Retrospective Studies; D012307:Risk Factors
keywords: CM-I = Chiari I malformation; CRH = Chiari-related hydrocephalus; Chiari malformation; PFD = posterior fossa decompression; hydrocephalus; posterior fossa decompression; ventriculoperitoneal shunt