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Updated: Mar 13, 2026
Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
Published on: October 14, 2022
Evaluation of the 2000 g Cutoff for Ventriculoperitoneal Shunt Placement in Premature Infants: A Systematic Review
Rachel A Lopez1, Alex W Houpt1, Burak Ozaydin1
1Department of Neurosurgery, Division of Pediatric Neurosurgery, Oklahoma University Health System, Oklahoma City, Oklahoma, USA.
Background And Objectives:
As perinatal care continues to advance, the timing of cerebrospinal fluid diversion in the increasing number of premature children with hydrocephalus remains unclear. Previous studies and clinical practices have used the 2000 g weight cutoff as a standard metric for ventriculoperitoneal shunt (VPS) insertion; however, this value has never been validated. We aimed to evaluate the validity of the 2000 g weight cutoff for VPS through systematic review and meta-analysis.
Methods:
A Preferred Reporting Items for Systematic Reviews and Meta-Analysis-compliant systematic review was conducted on MEDLINE, EMBASE, and PubMed from 01/01/1975 to 06/17/2025. Included studies reported the shunt outcomes of premature infants who received a VP shunt within the first 3 months of life and documented weight at the time of VP shunt placement. Outcomes of interest were shunt failure, infection, and death. Sixteen studies (18 cohorts) included 779 patients, of whom 160 were under 2000 g at the time of shunt placement. Meta-analysis was conducted using the random effects model and inverse variance method to assess differences in outcomes between cohorts above and below 2000 g.
Results:
No statistically significant difference was observed between the pooled proportions between subgroups for each outcome. Further subgroup analysis revealed a statistically significant difference (P = .006) in infection rates by splitting the over 2000 g group into a 2000-2500 g and an over 2500 g group. Heterogeneity was substantial for each analysis (P < .001). Weighted, piecewise, linear regressions for outcomes as a function of shunt weight did not demonstrate a clear inflection point for adverse outcomes at the 2000 g mark.
Conclusion:
These findings do not support the 2000 g threshold as a clinically meaningful determinant of suitability for VPS placement. Further research is necessary to delineate other potential modifiable and identifiable drivers of shunt appropriateness.
