Retrograde Light Target Tracheal Intubation Technique:Clinical Comparison With Direct Pharyngoscopic Tracheal Intubation

Clinical Comparison of Direct Pharyngoscopic Tracheal Intubation Technique With Light-guided Tracheal Intubation

The investigators hypothesise that, for novices, light guided tracheal intubation will improve the time and success rate of this clinical skill compared to standard direct tracheal intubation.

Study Overview

• Status: Completed
• Conditions: Tracheal Intubation Morbidity
• Intervention / Treatment: Procedure: light guided tracheal intubation

Detailed Description

The experiment was conducted under the close supervision of the coaching anesthesiologists in several stages.

The training stage: First of all, the operators received training with respect to the theories and principles of airway management, including techniques of bag-mask ventilation, Direct laryngoscopy and tracheal intubation and light-guided and tracheal intubation until they had a good master about the theoretical background, technical risks and indications of the two techniques. Then, they had to receive manikin training of the two techniques on the Airway Management Trainer. Exposure of the glottis(EG)/tracheal intubation(TI) training would be continued before they were able to use both techniques to complete three consecutive cases of Exposure of the glottis/tracheal intubation operation successfully on the manikin trainer within 120 seconds (s) at a time.

20 medical workers were assigned to perform TI within 120s with either Direct laryngoscopy TI or light-guided TI technique, which was selected randomly and then converted to the alternative one until they complete 5 cases with each of the two techniques. The time of EG started from mouth opening of the patient to the exposure of the glottis. The time of TI also started from mouth opening of the patient to the completion of inserting the tracheal guide to the tracheal and sealing it with cuff inflation. The EG time, Cormack-Lehane (C&L) grades, TI time, one-time success rate, and the overall success rate in using the two TI techniques were recorded.

The patient was laid in a supine position, with the head laid on a 7cm-high pillow for the sake of stability. The peripheral vein was accessed routinely and connected to a standard monitor for electrocardiography (ECG), SpO2 and noninvasive blood pressure (BP). Sufficient oxygen inhalation was initiated for > 3min before induction of general anesthesia with midazolam, propofol, fentanyl and rocuronium bromide. The anesthesiologist was not allowed to give any instruction and suggestion or assistance to the operator during the whole process. The coaching anesthesiologist supervised the whole TI process closely. Should any hidden risk occur or the TI exceed the required time of the experiment, the TI attempt of the operator would be terminated and replaced by the anesthesiologist in order to ensure patients' safety: TI exceeded 120s; Attempt of TI exceeded 2 times; SpO2 decreasing to below 95%; appearance of unstable hemodynamic situations (mean BP or HR fluctuating by more than 25% of the baseline value); or occurrence of airway injury as evidenced by stained blood on the Macintosh Blade. Any patient with C&L grade III~IV as discovered by the anesthesiologist during TI would be excluded from the present study and replaced by anther patient to re-start the experiment. A 7.0- or 7.5-mm-ID endotracheal tube was used as the guide according to the patient's condition.

• Study Type: Interventional
• Enrollment (Actual): 200
• Phase: Not Applicable

Contacts and Locations

Study Locations

• China
  • Shanghai
    • Shanghai, Shanghai, China, 200433
      • Changhai Hospital affiliated to Second Military Medical University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 55 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• age range 18~55 years
• general anesthesia
• ASA I~II
• Mallampati Score grade I~II
• thyromental distance ≥6cm
• mouth-open ≥3cm
• body mass index (BMI) ≤30kg/m2

Exclusion Criteria:

• neck and maxillofacial surgeries
• temporomandibular joint (TMJ) disease
• potential risks for regurgitation and pulmonary aspiration
• in pregnancy

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Health Services Research
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Single

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Tracheal intubation	Procedure: light guided tracheal intubation; Tracheal intubation light guided technique.; Other Names: intubation

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Ease to intubate (time and success rate required to perform intubation)	Within 8 months

Collaborators and Investigators

• Sponsor: Second Military Medical University
• Investigators: Study Director: Tao Yang, MD, Department of Anesthesiology and Cirtical Care Medicine, Changhai Hospital Affiliated to Second Military Medical University; Study Director: Jiong Hou, MD, Department of Anesthesiology and Cirtical Care Medicine, Changhai Hospital Affiliated to Second Military Medical University; Study Director: Xiaoming Deng, Professor, Department of Anesthesiology and Cirtical Care Medicine, Changhai Hospital Affiliated to Second Military Medical University; Principal Investigator: Xu Zhang, MD, Department of Anesthesiology and Cirtical Care Medicine, Changhai Hospital Affiliated to Second Military Medical University; Principal Investigator: Wen Ni, MD, Department of Anesthesiology and Cirtical Care Medicine, Changhai Hospital Affiliated to Second Military Medical University; Principal Investigator: Xiaoyan Zhu, MD, Second Military Medical University; Principal Investigator: Jinbao Li, MD, Department of Anesthesiology and Cirtical Care Medicine, Changhai Hospital Affiliated to Second Military Medical University

Study record dates

Study Major Dates

• Study Start: May 1, 2010
• Primary Completion (Actual): March 1, 2011
• Study Completion (Actual): April 1, 2011

Study Registration Dates

• First Submitted: May 4, 2010
• First Submitted That Met QC Criteria: May 4, 2010
• First Posted (Estimate): May 5, 2010

Study Record Updates

• Last Update Posted (Estimate): September 27, 2011
• Last Update Submitted That Met QC Criteria: September 25, 2011
• Last Verified: September 1, 2011

More Information

Terms related to this study

• Other Study ID Numbers: 19781007