Effect of Head Rotation on Efficiency of Face Mask Ventilation in Anesthetized Apneic Adults

Effect of Head Rotation on Efficiency of Face Mask Ventilation in Anesthetized Apneic Adults: A Prospective Randomized Crossover Study

Upper airway obstruction commonly occurs after induction of general anesthesia. The aim of this study is to determine if head rotation improves the efficiency of mask ventilation of anesthetized apneic adults.

Study Overview

• Status: Completed
• Conditions: Anesthesia
• Intervention / Treatment: Procedure: Head rotation during mask ventilation

Detailed Description

When apnea is achieved after induction, face mask ventilation is started in either a neutral head position or a head position axially rotated 45 degrees to the right. Mask ventilation will be carried out for 1 minute (Step 1) with pressure control ventilation of an anesthesia machine at peak inspiratory pressure 15 cmH2O, 10 breaths per minute, inspiration time to expiration time ratio 1:2 and no positive end-expiratory pressure. Then, mask ventilation will continue but head position will be crossed over (Step 2) and Step 1 will be repeated (Step 3). Expiratory tidal volume (VTE) will be measured by using respiratory inductive plethysmograph.

• Study Type: Interventional
• Enrollment (Actual): 40
• Phase: Not Applicable

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 75 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• Patients with body mass index in the range of 18.5 to 35.0 kg/m2, who meet American society of anesthesiologists physical status classification I to III and require general anesthesia with tracheal intubation.

Exclusion Criteria:

• Patients with limited head rotation/extension, gastro-esophageal reflux or a full stomach, known sleep apnea in continuous positive airway pressure therapy and any anticipated difficult airway likely requiring awake intubation.

Study Plan

How is the study designed?

Design Details

• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Mask ventilation in rotated head position; Patient's head will be axially rotated 45 degrees to the right	Procedure: Head rotation during mask ventilation; Patient's head position is axially rotated 45 degrees to the right.
No Intervention: Mask ventilation in neutral head position

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Change in averaged expiratory tidal volume measured by Respiratory monitor	Change in tidal volume between data of 2 min and average data from 1 and 3 min	1, 2 and 3 min after the initiation of mask ventilation

Collaborators and Investigators

• Sponsor: Massachusetts General Hospital
• Investigators: Principal Investigator: Jeremi R Mountjoy, M.D., Massachusetts General Hospital

Publications and helpful links

General Publications

• Apfelbaum JL, Hagberg CA, Caplan RA, Blitt CD, Connis RT, Nickinovich DG, Hagberg CA, Caplan RA, Benumof JL, Berry FA, Blitt CD, Bode RH, Cheney FW, Connis RT, Guidry OF, Nickinovich DG, Ovassapian A; American Society of Anesthesiologists Task Force on Management of the Difficult Airway. Practice guidelines for management of the difficult airway: an updated report by the American Society of Anesthesiologists Task Force on Management of the Difficult Airway. Anesthesiology. 2013 Feb;118(2):251-70. doi: 10.1097/ALN.0b013e31827773b2. No abstract available.
• Walsh JH, Maddison KJ, Platt PR, Hillman DR, Eastwood PR. Influence of head extension, flexion, and rotation on collapsibility of the passive upper airway. Sleep. 2008 Oct;31(10):1440-7.
• Isono S, Tanaka A, Nishino T. Lateral position decreases collapsibility of the passive pharynx in patients with obstructive sleep apnea. Anesthesiology. 2002 Oct;97(4):780-5. doi: 10.1097/00000542-200210000-00006.
• Itagaki T, Oto J, Burns SM, Jiang Y, Kacmarek RM, Mountjoy JR. The effect of head rotation on efficiency of face mask ventilation in anaesthetised apnoeic adults: A randomised, crossover study. Eur J Anaesthesiol. 2017 Jul;34(7):432-440. doi: 10.1097/EJA.0000000000000582.

Study record dates

Study Major Dates

• Study Start: July 1, 2014
• Primary Completion (Actual): January 1, 2016
• Study Completion (Actual): January 1, 2016

Study Registration Dates

• First Submitted: April 25, 2016
• First Submitted That Met QC Criteria: April 26, 2016
• First Posted (Estimate): April 28, 2016

Study Record Updates

• Last Update Posted (Estimate): April 28, 2016
• Last Update Submitted That Met QC Criteria: April 26, 2016
• Last Verified: April 1, 2016

More Information

Terms related to this study

• Keywords: Airway; Mask ventilation; Anesthesia induction
• Other Study ID Numbers: 2013P002571