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Which blade gives a better view? study compares miller and macintosh laryngoscopes
NCT ID NCT05494463
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study compared two types of laryngoscope blades (Miller and Macintosh) used to help place a breathing tube during general anesthesia. Over 1,100 adults having planned surgery had their airway viewed with both blades to see which gave a better look at the voice box opening. The goal was to find out which blade might make intubation easier and safer.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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1,130 people
The number who actually took part.
- Started
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May 2022
- Finished
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Feb 2023
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 90 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * all patients scheduled for elective procedures under general anesthesia with endotracheal intubation Exclusion Criteria: * patients with expected difficutl intubation requiring advanced intubation techniques * with injuries of the cervical spine, or for surgery in the cervical spine * patients with increased intracranial and intraocular pressure, with vascular changes in the CNS and other parts of the body * patients with ASA III and above * patients who do not consent to participate in the study
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Medical University of Lodz, Poland
Lodz, 90-153, Poland
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