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Interaction Between Head/Neck Position and C-MAC Blade Geometry on Videolaryngoscopic Intubation in Morbidly Obese Patients: A Randomized Controlled Trial

Interaction Between Head/Neck Position and C-MAC Blade Geometry on Videolaryngoscopic Intubation in Morbidly Obese Patients: A Randomized Controlled Trial

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07636746
Acronym
C-MAC
Enrollment
140
Registered
2026-06-09
Start date
2026-04-17
Completion date
2026-11-01
Last updated
2026-06-09

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Morbid Obesity

Brief summary

This study aims to explore the effect of head/neck position (sniffing vs ramped) and C-MAC blade geometry (MAC vs D-blade) on intubation in morbidly obese patients. The patients will be randomized into 4 groups: 1. S MAC: Sniffing + MAC blade. 2. R MAC: Ramped + MAC blade. 3. S D-blade: Sniffing + D-blade. 4. R D-blade: Ramped + D-blade.

Interventions

DEVICESniffing position and using MAC blade.

Machintosch blade will be used in intubating patient in sniffing position

DEVICERamped position and MAC Blade

MAC blade will be used in intubating patient in ramped postion

DEVICEvideolaryngoscopy

D-blade will be used in intubating patient in sniffing position

DEVICEvideolaryngosopy

D-blade will be used in intubating patient in Ramped position

Sponsors

Ain Shams University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 70 Years
Healthy volunteers
No

Inclusion criteria

* Age 18-70 years. * BMI ≥ 40 kg/m². * ASA physical status III - IV. * Elective surgery requiring intubation. * Informed consent obtained.

Exclusion criteria

* Anticipated difficult airway unrelated to obesity. * Cervical spine pathology. * Pregnancy. * Emergency surgery. * High aspiration risk. * OSA requiring CPAP \>15 cmH₂O. * Need for awake intubation.

Design outcomes

Primary

MeasureTime frameDescription
Intubation time (seconds), from blade insertion to confirmed placement via capnography.secondsIntubation time (seconds), from blade insertion to confirmed placement via capnography.

Countries

Egypt

Contacts

PRINCIPAL_INVESTIGATORfagr fathy abdo, Medical Doctorate

Ain Shams University

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 10, 2026