Comparing two types of laryngoscopes for intubation in thoracic surgery patients

Comparison Between McGrath and Macintosh Laryngoscopes for Double-lumen Tube Intubation in Patients Undergoing Thoracic Surgery, A Prospective Randomized Controlled Trial

Not applicable Interventional Aga Khan University · NCT05988736

This study tests which type of laryngoscope, McGrath or Macintosh, helps doctors more easily and quickly put a breathing tube in patients having thoracic surgery.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment84 (estimated)
Ages18 Years to 65 Years
SexAll
SponsorAga Khan University Academic / other
Locations1 site (Karachi, Sindh)
Trial IDNCT05988736 on ClinicalTrials.gov

What this trial studies

This clinical trial aims to compare the effectiveness of McGrath and Macintosh laryngoscopes in facilitating intubation for patients undergoing thoracic surgery. Participants will be randomly assigned to one of two groups: Group A will use the Macintosh laryngoscope, while Group B will use the McGrath laryngoscope. The primary outcomes measured will be the rate of successful intubation on the first attempt and the time taken for intubation with each device. The study will include patients aged 18-65 who are classified as ASA I, II, or III and require one-lung ventilation for elective thoracic surgery.

Who should consider this trial

Good fit: Ideal candidates for this study are elective thoracic surgery patients aged 18-65 with ASA physical status I, II, or III.

Not a fit: Patients with a history of difficult intubation, structural airway problems, or those requiring rapid sequence induction may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could improve intubation success rates and reduce the time required for intubation in thoracic surgery patients.

How similar studies have performed: Previous studies comparing different laryngoscope types have shown varying results, indicating that this approach has been explored but may still yield novel insights.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age 18-65 years
* American Society of Anaesthesiologists physical status (ASA) I, II, III
* Elective thoracic surgery patients, requiring one lung ventilation.

Exclusion Criteria:

* Patients requiring rapid sequence induction
* Patients with a structural problem in the airway on chest radiography
* History of difficult intubation
* Planned tracheostomy \\ the presence of a tracheostomy

  * Patients with a BMI \>35 kg\\m2. Who at risk of regurgitation\\ Aspiration
  * Anticipated Difficult Airway (Mallampati IV)
  * Pre-existing sore throat or hoarseness, or recent respiratory infection (\<15 days)

Where this trial is running

Karachi, Sindh

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Thoracic DiseasesThoracic NeoplasmsThoracic Empyema
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.