COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC:

Get the latest research information from NIH: Menu

Non-Invasive Ventilation Via a Helmet Device for Patients Respiratory Failure

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01680783
Recruitment Status : Completed
First Posted : September 7, 2012
Results First Posted : July 2, 2017
Last Update Posted : May 22, 2020
Information provided by (Responsible Party):
University of Chicago

Brief Summary:
The objective of our study is to evaluate the efficacy of helmet ventilation as compared with Face mask in patients with respiratory failure.

Condition or disease Intervention/treatment Phase
Acute Respiratory Distress Syndrome Shock Ventilatory Failure Cardiogenic Pulmonary Edema Device: Non invasive ventilation using a helmet hyperbaric device Other: Noninvasive ventilation via facemask Not Applicable

Detailed Description:

Respiratory failure is often treated with endotracheal intubation and mechanical ventilation. Although, the institution of mechanical ventilation is considered life saving, the associated complications of tracheal stenosis, ventilator associated pneumonia, barotrauma , and neuromuscular weakness are not without considerable morbidity and mortality.

Non-invasive ventilation has demonstrated significant benefit in patients with hypercapnic respiratory failure from COPD, acute cardiogenic pulmonary edema, and hypoxemic respiratory failure in immunocompromised patients.

Despite the advantages of non-invasive ventilation via facemask, some patients fail because of mask intolerance and severity of disease. Further limitation to facemask non-invasive ventilation is that the seal integrity is lost when higher pressures are required. Unfortunately, certain types of respiratory failure such as that due to hypoxemia or shock may require such higher pressures.

In an attempt to improve patient tolerability and deliver higher pressures, a transparent helmet has been proposed as a novel interface for non-invasive ventilation. It encloses the entire head and neck of the patient. The design of the helmet confers some important advantages: 1) the transparency allows the patient to interact with the environment; 2) the lack of contact to the face lowers the risk of skin necrosis; 3) the helmet avoids problems of leaking with higher airway pressures that are seen with the face mask; 4) it can be applied to any patient regardless of facial contour.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 83 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Mechanical Ventilation in Patients With \Respiratory Failure: A Comparison of Face Mask and Non Invasive Ventilation Via a Helmet Device
Study Start Date : September 2012
Actual Primary Completion Date : May 2016
Actual Study Completion Date : May 2016

Arm Intervention/treatment
Usual Care
Patients who require noninvasive ventilation via Face mask for more than 8 hours will continue using noninvasive ventilation via facemask.
Other: Noninvasive ventilation via facemask
Patients assigned to the conventional ventilation group will continue noninvasive ventilation via facemask
Other Name: mechanical ventilation

Experimental: Non invasive ventilation via helmet
Patients requiring more than 8 hours of noninvasive ventilation via facemask will switch to non-invasive ventilation using a helmet instead of face mask for treatment of respiratory failure
Device: Non invasive ventilation using a helmet hyperbaric device

Patients randomized to the intervention group will receive noninvasive ventilation delivered via a latex-free helmet connected to the ventilator by conventional tubing.

If endotracheal intubation is required, the helmet will be removed and the patient will be intubated without delay.

Other Name: Sea-Long medical treatment hood

Primary Outcome Measures :
  1. Need for Endotracheal Intubation [ Time Frame: 6 weeks ]
    Number of patients requiring endotracheal intubation after application of helmet device

Secondary Outcome Measures :
  1. Hospital Length of Stay [ Time Frame: Duration of hospital stay ]
    Days spent in hospital at time of enrollment

  2. Functional Status After Discharge [ Time Frame: Measured at 1, 6, and 12 months after hospital discharge (to span time frame of up to 80 weeks depending on length of hospitalization) ]
    Telephone survey of patients 1, 6, and 12 months after discharge to assess need for re-hospitalization, admission to nursing home, and functional status (ability to complete ADLs and IADLs independently)

  3. Ventilator-free Days [ Time Frame: number of days in the hospital ]
    Duration of mechanical ventilation via endotracheal tube

  4. Hospital Mortality [ Time Frame: 90 days ]
    Death from any cause during hospitalization at time of enrollment

  5. Intensive Care Unit Length of Stay [ Time Frame: 4 weeks ]
    Number of days admitted to a medical intensive care unit

Other Outcome Measures:
  1. ICU Complications [ Time Frame: 6 weeks ]
    ICU complications will include rates of Ventilator associated pneumonia, Barotrauma, Gastrointestinal hemorrhage, Pulmonary embolism, Sacral Decubitus ulcer, Delirium, ICU acquired weakness

  2. Readmission to the Intensive Care Unit [ Time Frame: 6 weeks ]
    Measure the need for readmission to the intensive care unit during initial hospitalization at time of enrollment

  3. Discharge Location [ Time Frame: 6 weeks ]
    Measure the location (ie home, rehabilitation center, nursing home) that patients are discharged to

  4. Improvement of Oxygenation [ Time Frame: 2 weeks ]
    Improvement of oxygenation-defined as PaO2/FiO2 ≥ 200 or increase from baseline by 100

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 100 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patients aged ≥18 years of age who require noninvasive ventilation via facemask for >8hours
  • Intact airway protective gag reflex
  • Able to follow instructions

Exclusion Criteria:

  • Cardiopulmonary arrest
  • Glasgow coma scale <8
  • Absence of airway protective gag reflex
  • Elevated intracranial pressure
  • Tracheostomy
  • Upper airway obstruction
  • Pregnancy.
  • Patients who refuse to undergo endotracheal intubation, whatever the initial therapeutic approach

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01680783

Layout table for location information
United States, Illinois
University of Chicago Medical Center
Chicago, Illinois, United States, 60637
Sponsors and Collaborators
University of Chicago
Layout table for investigator information
Principal Investigator: John P Kress, MD University of Chicago
Publications automatically indexed to this study by Identifier (NCT Number):
Layout table for additonal information
Responsible Party: University of Chicago Identifier: NCT01680783    
Other Study ID Numbers: 12-1391
First Posted: September 7, 2012    Key Record Dates
Results First Posted: July 2, 2017
Last Update Posted: May 22, 2020
Last Verified: May 2020
Keywords provided by University of Chicago:
noninvasive ventilation
acute hypoxemic respiratory failure
Acute respiratory distress syndrome
Additional relevant MeSH terms:
Layout table for MeSH terms
Respiratory Distress Syndrome, Newborn
Respiratory Distress Syndrome, Adult
Respiratory Insufficiency
Acute Lung Injury
Pulmonary Edema
Lung Diseases
Respiratory Tract Diseases
Respiration Disorders
Infant, Premature, Diseases
Infant, Newborn, Diseases
Lung Injury
Signs and Symptoms, Respiratory
Signs and Symptoms