Related Experiment Video
Updated: May 8, 2026
14:59
Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
Published on: October 14, 2022
Shunt-related cerebrospinal fluid overdrainage - a multicentre consensus definition
S Hornshøj Pedersen1, A Ammar2, M Czosnyka3
1Department of Neurosurgery, Copenhagen University Hospital, Copenhagen, Denmark. sarah.skovlunde.hornshoej.pedersen.01@regionh.dk.
Acta Neurochirurgica
|May 6, 2026
Summary
Overdrainage of cerebrospinal fluid (CSF) is a common complication after hydrocephalus shunt surgery. New age-specific definitions for CSF overdrainage were established to improve diagnosis and treatment in patients with shunts.
Area of Science:
- Neurosurgery
- Neurology
- Pediatric Neurosurgery
Background:
- Overdrainage of cerebrospinal fluid (CSF) is a recognized complication in hydrocephalus shunt treatment.
- A lack of a universally accepted definition for CSF overdrainage hinders research and clinical practice.
- A multicenter consensus study was initiated to establish a clinically relevant definition.
Purpose of the Study:
- To develop standardized, consensus-based definitions for cerebrospinal fluid (CSF) overdrainage.
- To address the ambiguity and variability in diagnosing and managing CSF overdrainage in shunt-treated hydrocephalus patients.
Main Methods:
- A modified Delphi consensus process involving 18 international neurosurgeons and neuroscientists specializing in hydrocephalus.
- Evaluation of 32 clinical and radiological manifestations of CSF overdrainage identified in a systematic literature review.
- Multiple rounds of questionnaires and virtual discussions to achieve consensus (>70% support).
Main Results:
- Established three age-dependent definitions for pediatric patients (infants, children with growing skull, children with fixed skull) and one for adults.
- Defined CSF overdrainage by cardinal posture-related symptoms (e.g., headache relieved by supine position) and radiological findings.
- Key radiological findings include ventricular collapse in pediatric patients and non-traumatic subdural collections across all age groups.
Conclusions:
- Consensus-based definitions offer a standardized framework for hydrocephalus research and clinical management.
- These definitions aim to reduce diagnostic and therapeutic variability in shunt-treated CSF overdrainage.
- Standardized definitions are crucial for advancing the understanding and treatment of hydrocephalus complications.
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