A Pilot Study of Demand Valve Oxygen Inhalation Therapy for Cluster

Status Terminated

Clinical Trial Summary

Cluster headache is a disorder marked by frequent attacks of short-lasting, severe, unilateral head pain with associated autonomic symptoms. It is the most severe head pain syndrome known. Currently, the two most common treatments for cluster headaches are inhaled oxygen and injectable sumatriptan. These treatments do not work for all cluster headache patients, and patients who smoke may eventually develop contraindication to triptans. New treatment options are needed.

An alternative method of oxygen delivery (as opposed to continuous flow) uses a demand valve that is controlled by respiration rate, allowing increased oxygen flow in response to increased demand. This system may be more efficacious at stopping a cluster headache attack than the currently prescribed oxygen delivery system.

This study will compare the effectiveness of oxygen delivered via demand valve versus continuous high flow oxygen via non-rebreather face mask in the acute treatment of a cluster headache attack. All patients will treat one cluster headache with each of the 2 treatment methods.

Clinical Trial Description

Cluster headache is a primary headache disorder marked by frequent attacks of short-lasting, severe, unilateral head pain with associated autonomic symptoms. The goal of acute therapy for cluster headache is fast, effective and consistent relief.

In the currently recommended dosing strategy of continuous flow 100% oxygen given via a non-rebreather face mask at 7-15L/min, the time to improvement can sometimes take upwards of 20-30 minutes and is not effective for all cluster headache sufferers.

An alternative method of oxygen delivery (versus continuous flow) uses a demand valve which is controlled by the respiration rate, allowing increased oxygen flow in response to increased demand. This delivery system may be better at stopping a cluster headache attack than the continuous flow model as it can support hyperventilation which can enhance cerebral arterial vasoconstriction via a state of hyperoxia and hypocapnia. Arterial vasoconstriction is one hypothesized method by which oxygen can abort a cluster headache attack.

This proof of concept trial will evaluate if oxygen delivered via demand valve with a specific breathing technique is effective as a cluster headache acute treatment and is more effective than the traditional continuous high flow oxygen treatment with a non-rebreather face mask. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT01298921
Study type	Interventional
Source	Geisinger Clinic
Contact
Status	Terminated
Phase	Phase 1
Start date	January 2011
Completion date	July 2012

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See also
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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

A Pilot Study of Demand Valve Oxygen Inhalation Therapy for Cluster Headache

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms