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Related Experiment Video

Updated: Nov 1, 2025

Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus

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Published on: October 14, 2022

Shuntogram utility in predicting future shunt failures.

Ariana Adamski, Michael W O'Brien, Matthew A Adamo

Journal of Neurosurgery. Pediatrics

|June 25, 2021

Summary

This summary is machine-generated.

Shuntograms can help diagnose shunt failure when imaging is unclear. While not perfect, a negative shuntogram result is useful for neurosurgeons managing potential shunt malfunction in patients.

Keywords:

hydrocephalus predictive value shunt failure shuntogram ventriculoperitoneal shunt

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Continuous Blood Sampling in Small Animal Positron Emission Tomography/Computed Tomography Enables the Measurement of the Arterial Input Function

Continuous Blood Sampling in Small Animal Positron Emission Tomography/Computed Tomography Enables the Measurement of the Arterial Input Function

Published on: August 8, 2019

Area of Science:

Neurosurgery
Medical Imaging
Diagnostic Procedures

Background:

Shunt failure diagnosis is challenging, especially with inconclusive radiographic findings.
Shuntograms are utilized to assess shunt malfunction when symptoms suggest a problem but imaging is equivocal.

Purpose of the Study:

To evaluate the clinical utility of shuntograms in managing patients with suspected shunt failure.
To determine the diagnostic accuracy of shuntograms, focusing on negative results and their impact on patient management.

Main Methods:

Retrospective analysis of 95 patients who underwent shuntograms over a 6-year period.
Evaluation of shuntogram findings against subsequent shunt revision surgery within 30 days and 1 year.
Calculation of sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV).

Main Results:

The shuntogram demonstrated 100% specificity and a 100% PPV for detecting shunt obstruction.
The negative predictive value (NPV) for predicting revision within 30 days was 68.3% (31.7% false-negative rate).
Valve replacement was the most common surgery after a negative shuntogram (38.5% of cases).

Conclusions:

Despite a notable false-negative rate, shuntograms are a valuable tool for clinical decision-making in suspected shunt failure.
The 68.3% NPV for 30-day revision indicates shuntograms aid in guiding neurosurgical management when shunt malfunction is suspected.