Does Body Positioning Affect the Yield of Hyperventilation in Routine Pediatric Electroencephalography - EEG Studies?

Not Applicable

• Conditions: Epilepsy, Absence
• Interventions: Other: hyperventilation while sitting up during routine EEG

• Registration Number: NCT02766595
• Lead Sponsor: Meir Medical Center

Brief Summary

Children referred for routine EEG studies for suspected absence seizures will be asked, upon caregiver's informed consent, to perform 3 minutes of hyperventilation both in the supine position and while sitting up. We aim to demonstrate that hyperventilation is more effective in eliciting absence seizures in a sitting position than while lying down.

Detailed Description

Hyperventilation is a very effective means of eliciting absence seizures in children with absence epilepsy. Worldwide EEG protocols for routine EEG recording include 3 minutes of hyperventilation. The whole EEG recording, including hyperventilation, is performed with the child lying down on a bed/coach. Our clinical experience suggests that the body position may affect the yield of hyperventilation in provoking the absence event. That is, hyperventilation may be more effective when the child is sitting up, Therefore, children referred for a routine EEG for suspected absence seizures will add 3 minutes of hyperventilation on a sitting position to the routine 3 minutes of supine hyperventilation. At least 5 minutes of rest will be allotted between both procedures.

Patients' caregivers will sign an informed consent form. Patients will randomly be divided into 2 groups: one group will first perform supine hyperventilation followed by sitting hyperventilation; the second group will perform hyperventilation in the opposite order, ie, first sitting up and then in supine position.

Basic Information
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Recruitment & Eligibility
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Study & Design

Study Timeline

• Status Verified: 2016-03
• Study First Submitted: 2016-03-10
• Study First Submitted QC: 2016-05-05
• Last Update Submitted: 2016-05-05
• Study First Posted: 2016-05-10
• Last Update Posted: 2016-05-10
• Study Start: 2016-06
• Primary Completion: 2017-01
• Study Completion: 2017-06

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 50

Inclusion Criteria

• Children referred for a routine EEG for suspected absence epilepsy

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Exclusion Criteria

• Patients unable to perform hyperventilation
• Children previously diagnosed with absence epilepsy
• Children receiving antiepileptic drugs

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Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
hyperventilation	hyperventilation while sitting up during routine EEG	Non-drug: performing hyperventilation while sitting up during routine EEG

Primary Outcome Measures

Name	Time	Method
Differences in elapsed time (in seconds) to onset of absence seizure between lying supine and sitting up during hyperventilation in routine EEG.	6 months	patients to be divided into 3 groups: Response A: occurrence of absence within 0-60 seconds; response B: within 60 - 120 seconds; response C: no occurrence of absence.

Secondary Outcome Measures

Name	Time	Method
Influence of order of performing hyperventilation, first supine and then sitting up, or vice-versa, on the time (in seconds) to occurrence of ansence seizures	6 months	Response A: 0 - 60 secs; response B: 60 - 120 seconds; response C: no occurrence of absence