Randomised Controlled Trial of Intubation With the McGrath Series 5 Video Laryngoscope vs the Macintosh Laryngoscope

Not Applicable

Completed

Interventions: Device: McGrath
Device: Tracheal intubation using Macintosh Laryngoscope

Brief Summary: The simplicity of use and intuitive function of the McGrath video-laryngoscope suggests it may have a bigger role than as a back-up to conventional direct laryngoscopy and could possibly be the first-line laryngoscope for situations where difficult intubations are more likely or more hazardous. The incidence of difficult or failed intubation for an individual anaesthetist is related to their experience, decreasing as experience increases. The purpose of this trial is to evaluate the McGrath laryngoscope when used by relatively inexperienced anaesthetists, who are those most likely to encounter difficulties.

The null hypotheses to be tested is that there is no difference between the Macintosh and McGrath laryngoscope in terms of ease and success in intubation.

Recruitment & Eligibility

Inclusion Criteria

Adults (18 years and over) scheduled for elective surgery whose anaesthetic plan would normally include oral intubation using a Macintosh laryngoscope blade after induction of general anaesthesia and who have given valid informed consent.

Exclusion Criteria

Patients requiring special techniques for intubation such as rapid sequence induction
Adults who have learning difficulties
Are unconscious or very severely ill
Have a terminal illness; are in an emergency situation
Have a mental illness
Have dementia
Prisoners
Those who could be considered to have a particularly dependent relationship with the investigator and other vulnerable groups.

Arm && Interventions

Group	Intervention	Description
Intubation c McGrath videolaryngoscope	McGrath	Tracheal Intubation using McGrath video-laryngoscope
Intubation using Macintosh Laryngoscope	Tracheal intubation using Macintosh Laryngoscope	Tracheal intubation using Macintosh Laryngoscope

Primary Outcome Measures

Name	Time	Method
Intubation Time	At intubation	Time from anaesthetist picking up laryngoscope until 1st upward capnograph deflection after intubation

Secondary Outcome Measures

Name	Time	Method
Difference in Learning to Use the Scopes	At analysis	Is there a difference between trainee anaesthetists in learning to use the scopes
Quality of View of the Vocal Cords	At analysis
Number of Attempts to Secure Successful Intubation	At analysis	Is there a difference in the number of attempts required to secure successful intubation ?
Incidence of Initial Oesophageal Intubation	At analysis
Number of Intubations Taking More Than 70 Seconds	At Analysis
Incidence of Low Arterial Saturation During Intubation	At analysis
Incidence of Visible Trauma to the Airway	At analysis