Neurostimulation for the Relief of Acute Bronchoconstriction

Study Overview
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Brief Summary
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The goal of this study is to validate design for the Resolve™ Stimulator and Proximity Electrode and the associated procedure to quickly and safely place an electrode into the neck, in the vicinity of the vagus nerve by a physician in either the Emergency Department or other appropriate hospital inpatient setting (e.g., ICU). The secondary goal is to confirm that the electrical signal being delivered via this electrode rapidly counters bronchoconstriction and improves airway flow.

Detailed Description
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The present study is to evaluate the safety of a new neurostimulator device, the Resolve Stimulator and Proximity Lead™, which comprises an external electrical signal generator coupled to temporary electrode that is percutaneously inserted in the neck. Sponsor believes, based on animal testing data provided as well as consultations with physicians who regularly treat patients suffering from attacks of acute bronchoconstriction in ER and inpatient hospital settings, that this device could be used in the skilled care hospital setting to help rapidly relax the smooth muscle in the airway, relieving a clinically significant portion of the bronchoconstriction suffered by patients experiencing moderate to severe asthma attacks, allowing more effective delivery of inhaled medications to restore the patient to his or her baseline respiration status.

Official Title
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Neurostimulation for the Relief of Acute Bronchoconstriction

Conditions
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Asthma

Intervention / Treatment
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* Device: Resolve Stimulator and Proximity Lead


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male / Female, Age 18-65 Subject declares a medical history of asthma or sufficient prior clinical experience/records exists to confirm the subject has received a diagnosis of bronchoconstriction Completed >1 hrs of conventional breathing and related medication treatments without improvement in FEV1 to > 70% predicted Able to give Informed Consent Exclusion Criteria: Scaring / abscess other problems with neck at electrode placement site Known or suspected carotid artery disease (i.e. bruits or history of stenosis) Suspected or confirmed coagulopathy Suspected or confirmed sepsis Irregular heart rate, rhythm Receiving pressors to maintain blood pressure Presently implanted electrical and/or neurostimulator device, including but not limited to cardiac pacemaker, vagal neurostimulator, deep brain stimulator, spinal stimulator, bone growth stimulator, or cochlear implant Allergy to local anesthetics used for placement of the lead History of lung cancer, emphysema, chronic obstructive pulmonary disease, or other comorbidity that might otherwise compromise the expected air flow volumes in the lungs At risk of imminent respiratory collapse Lung Function: FEV1 < 40% predicted Signs and Symptoms: Extreme symptoms at rest, accessory muscle use, chest retraction Alert State: Drowsy, confused Treatment with anti-cholinergic medications within 4 hours of enrollment

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Resolve Stimulator and Proximity Lead<br>An electrical neurostimulation signal will be applied to the neck via subcutaneous lead placement for vagal nerve stimulation, all subjects will receive active treatment | Device: Resolve Stimulator and Proximity Lead<br>* An electrical neurostimulation signal will be applied to the neck via subcutaneous lead placement for vagal nerve stimulation<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Safety- Number of Participants With Adverse Events | Safety- Number of participants that reported Adverse Events | 2 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Improvement of Common Measures of Breathing Performance, Forced Expiry Volume in 1second (FEV1). | An assessment of Forced Expiry Volume in 1second (FEV1) measurements were taken throughout the course of treatment (15,30 and 60 minutes). Peak FEV1 measurements were recorded for each subject, and the number of minutes the subject had received treatment at the time of peak FEV1. The threshold for improvement was set at 12% over baseline at any of the time points (15,30 and 60 minutes). Outcome measure data indicates the number of subjects above 12%. | 60 minutes | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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bronchoconstriction, neuromodulation, neurostimulation, vagus nerve stimulation, vagal nerve stimulation, nVNS, VNS, non invasive, gammacore