Study of Ultrasound of the Eye for Children With Suspected Shunt Failure

Hydrocephalus Clinical Trial

Official title:

Pediatric Ocular Ultrasound for VPS Failure

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00743457
• Other study ID #: IRB00004484
• Status: Completed
• Phase: N/A
• First received: August 27, 2008
• Last updated: October 12, 2012
• Start date: August 2008
• Est. completion date: March 2009

Study information

• Verified date: October 2012
• Source: Oregon Health and Science University
• Contact: n/a
• Is FDA regulated: No
• Health authority: United States: Institutional Review Board
• Study type: Observational

Clinical Trial Summary

The purpose of the study is to determine whether an ultrasound of the eye can be used as a radiation-free alternative to X-ray to identify children with risk of shunt failure in the Emergency Department. Please note that a shunt is an artificial or natural channel running between two other channels.2. Briefly summarize how participants are recruited.

Description:

Children (6 months to 18 years old) with ventriculoperitoneal shunts presenting to the Emergency Department (ED) with signs and symptoms of shunt failure will be recruited through their parent/legal guardian when the parent/guardian brings the child to the emergency room. Ventriculoperitoneal shunt is a device implanted surgically to relieve pressure inside the skull (intracranial pressure) caused by water on the brain (hydrocephalus).

Screening for the study includes a check of the child's age and the diagnosis by CRISP volunteer research assistants in the ED between 08:00 and 23:00. If the child is eligible, the CRISP volunteer research assistants will contact the study team. Parents/guardians will be informed by the study team of the availability of the study and will be asked if they would like to have the study explained to them and if they would like to read the consent form regarding the study. In addition to that, assent of children over 7 years of age will be obtained.

Information will be collected from the child's medical record, including medical history and current and prior symptoms and illnesses. The parent/guardian will also be asked if they believe their child's illness is due to a shunt malfunction. The child will undergo a physical exam and an ultrasound of the eye where the diameter of their optic nerve (ONSD) will be recorded. The optic nerve is the nerve that carries visual messages from the retina to the brain. Standard radiographic images, obtained as part of standard of care, will be reviewed by study radiologists blinded to the ultrasound results. The study radiologist will review the radiologic imaging and record if the outcome is suggestive of shunt failure. Another study radiologist from the Casey Eye Institute will review the results of the ocular ultrasound and record if the results are optimal or not optimal. Four weeks after the child was originally taken to the emergency room, the study team will review the child's medical record for information about the child's ED diagnosis, the procedures performed during their ED visit and if the initial radiology read was suggestive of shunt failure.

The study team will complete the ED Encounter Form on the day of the child's visit to the ED. The ED Encounter Form includes one question to the parent/guardian, who will be asked if they believe their child's illness is due to a shunt malfunction.

Results will be presented using descriptive statistics. The primary outcome measure is the proportion of children with a shunt failure who are correctly identified by the ocular ultrasound and proportion of children without shunt failure who have had a negative screening test result when an ocular ultrasound is used.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 36
• Est. completion date: March 2009
• Est. primary completion date: February 2009
• Accepts healthy volunteers: No
• Gender: Both
• Age group: 6 Months to 18 Years

Eligibility

Inclusion Criteria:

• 6 months to 18 years with VPS

• Headache

• Vomiting

• Mental status changes

Exclusion Criteria:

• Elevated intra-ocular pressure or known globe injury

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Related Conditions & MeSH terms

• Hydrocephalus

Intervention

Device:
• Ocular Ultrasound
B-mode ultrasound of the eye with 90 and 30 degree view of optic nerve sheath

Locations

Country	Name	City	State
United States	Oregon Health & Science University	Portland	Oregon

Sponsors (1)

Lead Sponsor	Collaborator
Oregon Health and Science University

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Optic Nerve Sheath Diameter		Within 4 hours of enrollment	No
Primary	Clinical VPS Failure		Within 4 weeks of enrollment	No
Secondary	Standard Neuro-imaging Results (CT, MRI, X-rays)		Day of enrollment	No