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Cohort 2 Efficacy of Nasopharyngeal Ventilation With Endotracheal Tube for Surgery (MASK)

This study is currently recruiting participants. (see Contacts and Locations)
Verified January 2017 by University of Louisville
Information provided by (Responsible Party):
Rainer Lenhardt, University of Louisville Identifier:
First received: October 29, 2013
Last updated: January 27, 2017
Last verified: January 2017

Failed mask ventilation poses an increased risk of de-oxygenation to the patient undergoing general anesthesia. Nasopharyngeal ventilation may be a valid alternative for mask ventilation allowing for better oxygenation during the induction phase of general anesthesia. Oxygenation may be maintained better in case of difficult mask ventilation. This study evaluates this alternative method in comparison with the standard method of mask ventilation.

General Design This is a randomized, controlled, cross over study. Patients will be randomized to mask ventilation followed by nasopharyngeal airway placement and ventilation or vice versa.

Primary Study Endpoints We will test the hypothesis that ventilation via a nasally placed ETT is superior in its efficacy (as measured by tidal volume) to routine facemask ventilation in patients undergoing general anesthesia and endotracheal intubation for their surgery.

Condition Intervention
General Anesthesia With Endotracheal Intubation in Surgery
Other: Mask then nasopharyngeal
Other: Nasopharyngeal then mask

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: No masking
Primary Purpose: Prevention
Official Title: Cohort 2 Efficacy of Nasopharyngeal Ventilation With Endotracheal Tube for Patients With Predicted Difficult to Mask Ventilate

Further study details as provided by University of Louisville:

Primary Outcome Measures:
  • Tidal volume [ Time Frame: 15 minutes ]
    After facemask or nasopharyngeal ventilation

Secondary Outcome Measures:
  • Airway pressure [ Time Frame: 3 min after facemask or nasopharyngeal ventilation ]

Estimated Enrollment: 20
Study Start Date: June 2015
Estimated Study Completion Date: March 2018
Estimated Primary Completion Date: November 2017 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Nasopharyngeal then mask
Patients will be randomized to nasopharyngeal airway placement and ventilation followed by mask ventilation
Other: Nasopharyngeal then mask
Patients will be randomly assigned to naso-pharyngeal ventilation followed by mask ventilation.
Mask then nasopharyngeal
Patients will be randomized to mask ventilation followed by nasopharyngeal airway placement and ventilation
Other: Mask then nasopharyngeal
Patients will be randomly assigned to Mask ventilation followed by naso-pharyngeal ventilation

  Show Detailed Description


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Subjects undergoing general anesthesia and require endotracheal intubation.
  2. Adults patients 18 years or greater
  3. Subjects are capable of understanding and signing the Informed Consent Form or have an acceptable representative capable of giving legally authorized consent on their behalf.
  4. Meet three or more of predictive difficult to mask criteria as listed:

    1. Age = or > than 55
    2. BMI = or > than 30
    3. Edentulism
    4. History of snoring and/or a diagnoses of obstructive sleep apnea
    5. STOP/BANG score of three or greater
    6. Presesnce or a beard or mustach that covers the part of the face in conntact with the facemask edges
    7. Male gender
    8. History of neck radiation
    9. Mallampati score of III or IV

Exclusion Criteria:

  • Subjects will be excluded from this study in cases where there will not be an attempt at mask ventilation. This includes patients that will require an awake fiberoptic intubation as well as those needing a rapid sequence intubation.
  • Subjects with full stomachs, known hiatal hernia, and severe gastroesophageal reflux will be excluded.
  • Subjects with known or suspected basilar skull fractures will be excluded.
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT02018146

Contact: Rainer Lenhardt, MD 502-852-3122

United States, Kentucky
University of Louisville Recruiting
Louisville, Kentucky, United States, 40202
Contact: Elizabeth Cooke, RN    502-852-5851   
Principal Investigator: Rainer Lenhardt, M.D.         
Sponsors and Collaborators
University of Louisville
Principal Investigator: Rainer Lenhardt, MD University of Louisville School of Medicine
  More Information

Responsible Party: Rainer Lenhardt, Associate Professor, University of Louisville Identifier: NCT02018146     History of Changes
Other Study ID Numbers: 13.0570
Study First Received: October 29, 2013
Last Updated: January 27, 2017

Keywords provided by University of Louisville:
Laryngeal Masks
Airway Management processed this record on April 26, 2017