Distance From the Glottis to the Grille in Children

Seoul National University

Status: Completed

Conditions: General Anesthesia

Treatments: Procedure: fiberoptic bronchoscope

Study type: Interventional

Funder types: Other

Identifiers

NCT03156166

H1704-133-848

Details and patient eligibility

About

Ambu AuraGain, I-gel, Air-Q intubating laryngeal airway are the most commonly used supraglottic airway. In children, they can be used as intubation conduits. However, there has been no guideline for optimal insertion depth of endotracheal tube through those supraglottic airway. In this study, the investigators will measure the distance from grille of those supraglottic airways to glottis using fiberoptic bronchoscope in children undergoing anesthesia. This distance allows us to predict an appropriate depth of endotracheal tube when it should be inserted through each supraglottic airway.

Enrollment: 89 patients

Sex: All

Ages: Under 7 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• children < 7 years old undergoing elective surgery

Exclusion criteria

• difficult airway
• BMI> 30kg/m2
• emergency operation
• cervical spine disease
• history of esophageal disease and surgery

Trial design

Primary purpose: Other

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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89 participants in 3 patient groups

Ambu AuraGain

Experimental group

Description:

Ambu AuraGain is inserted in children undergoing general anesthesia. The size of AuraGain is as follows: size 1 for children \<5 kg, size 1.5 for 5-10kg, size 2 for 10-20kg, size 2.5 for 20-30kg. Fiberoptic bronchoscope will be performed to measure the distance between the grill and vocal cord.

Treatment:

Procedure: fiberoptic bronchoscope

I-gel

Experimental group

Description:

I-gel is inserted in children undergoing general anesthesia. The size of I-gel is as follows: size 1 for children weighing 2-5kg, size 1.5 for 5-12kg, size 2 for 10-25kg, size 2.5 for 25-35kg. Fiberoptic bronchoscope will be performed to measure the distance between the grill and vocal cord.

Treatment:

Procedure: fiberoptic bronchoscope

Air-Q intubating laryngeal airway (ILA)

Experimental group

Description:

Air-Q ILA is inserted in children undergoing general anesthesia. The size of Air-Q ILA is as follows: size 1 for children between 4-7 kg, size 1.5 for 7-17kg, size 2 for 17-30kg, size 2.5 for 30-50kg. Fiberoptic bronchoscope will be performed to measure the distance between the grill and vocal cord.

Treatment:

Procedure: fiberoptic bronchoscope