Child's Nervous System

, Volume 29, Issue 12, pp 2275–2280 | Cite as

Bedside optic nerve sheath diameter ultrasound for the evaluation of suspected pediatric ventriculoperitoneal shunt failure in the emergency department

  • M. Kennedy Hall
  • David M. Spiro
  • Alfredo Sabbaj
  • Christopher L. Moore
  • Katharine L. Hopkins
  • Garth D. Meckler
Original Paper

Abstract

Objective

To determine the feasibility and test characteristics of optic nerve sheath diameter (ONSD) measured by ocular ultrasound as a screening tool for ventriculoperitoneal shunt (VPS) failure.

Methods

Prospective observational study using a convenience sample of children 6 months to 18 years of age, presenting to an academic pediatric emergency department for evaluation of possible VPS failure between September 2008 and March 2009. ONSD was measured by anterior transbulbar and lateral transbulbar techniques. Mean ONSD was compared between subjects with and without shunt failure, as determined by neurosurgical decision to operate.

Results

A total of 39 encounters were completed, including 20 VPS failures. The mean ONSD was 4.5 ± 0.9 and 5.0 ± 0.6 mm among encounters with and without shunt failure (p = 0.03), respectively. The mean ONSD was not statistically different when obtained by the anterior transbulbar vs. the lateral transbulbar approach (4.8 ± 1.0 vs. 4.7 ± 0.8 mm, p = 0.12). ONSD ultrasound had a sensitivity of 61.1 % (95 % CI 35.7–82.7) and specificity of 22.2 % (95 % CI 6.4–47.6 %) for detecting shunt failure in this sample.

Conclusions

ONSD ultrasound does not appear to be a useful primary screening tool in emergency department evaluation of VPS failure. There was no difference between the anterior transbulbar approach and the lateral transbulbar approach. Children with VPS in our sample have larger ONSD measurements than in previously reported studies.

Keywords

Optic nerve ultrasound Ventriculoperitoneal shunts Elevated intracranial pressure Pediatrics Emergency medicine 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • M. Kennedy Hall
    • 1
  • David M. Spiro
    • 2
  • Alfredo Sabbaj
    • 3
  • Christopher L. Moore
    • 4
  • Katharine L. Hopkins
    • 5
  • Garth D. Meckler
    • 2
  1. 1.Department of Emergency MedicineUniversity of California, San FraniscoSan FranciscoUSA
  2. 2.Department of Emergency Medicine, Section of Pediatric Emergency MedicineOregon Health and Science UniversityPortlandUSA
  3. 3.Department of Emergency MedicineOregon Health and Science UniversityPortlandUSA
  4. 4.Department of Emergency MedicineYale University School of MedicineNew HavenUSA
  5. 5.Departments of Radiology and PediatricsOregon Health and Science UniversityPortlandUSA

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