Comparing two intubation devices (videolaryngoscope vs straight blade laryngoscope) in intubating patients with potential difficult airways.

Not Applicable

Completed

• Conditions: Patients with potential difficult airways; Anaesthesiology - Anaesthetics

• Registration Number: ACTRN12609000688280
• Lead Sponsor: Royal Melbourne Hospital

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2009-08-12
• Last Update Posted: 13 January 2020

Recruitment & Eligibility

• Status: Completed
• Sex: All
• Target Recruitment: 80

Inclusion Criteria

Adult patients with American Society of Anesthesiologists (ASA) physical status classification system I, II or III and Mallampati III or IV (assessed with patients sitting upright with head in neutral position. Patients open the mouth maximally, protruding the tongue without phonation; class 3: soft and hard palate and base of the uvula are visible, class 4: only hard palate visible), who are scheduled for elective surgery requiring oro-tracheal intubation at the Royal Melbourne Hospital will be recruited for this study.

Exclusion Criteria

Exclusion criteria include patients who are < 18 years of age, non-English speaking, ASA Grade IV or V, presence of any other predictors of difficult intubation, including small mouth opening (< 4cm), short thyromental distance (< 6cm) and reduced neck extension (< 80o), patients at risk of regurgitation and aspiration (defined as history of oesophageal reflux, known hiatus hernia and not fasted), or patients with cervical spine instability.

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Comparison of the laryngoscopy view using the Cormack and Lehane grading system (Grade I to IV) between the Miller straight blade laryngoscope and the McGrath Video Laryngoscope in patients with Mallampati grade III or IV.[At the time of intubation]

Secondary Outcome Measures

Name	Time	Method
The time taken for successful tracheal intubation, which is measured from the time the allocated intubating device is inserted in the patient's mouth until end-tidal carbon dioxide is detected. If failed intubation is encountered, the time taken to resort to an alternative airway management is measured instead.[At the time of intubation];The proportion of successful and failed intubation in each of the study group. Failed intubation is defined as failure after 3 attempts.[At time of intubation];The number of attempts needed for successful tracheal intubation.[At time of intubation];The ease of intubation which will be surveyed using a visual analogue scale from 0-100mm.[At time of intubation];Any complications associated with oro-tracheal intubation will be recorded, such as, lips, oral mucosal and dental injury, oesophageal intubation, hypoxia (SpO2 < 90%) during intubation.[At time of intubation]