Determining the Depth of Endotracheal Tube Insertion

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT02158247

Enrollment

176

Registered

2014-06-06

Start date

2012-01-31

Completion date

Unknown

Last updated

2014-07-22

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

Conditions

Endotracheal Intubation, Individualized Depth of Endotracheal Intubation

Brief summary

1. Airway length from the medial incisor to carina is divided into four segments ; the length from medial incisor to mouth angle, mouth angle to epiglottis, epiglottis to vocal cords and vocal cords to carina. 2. Determining the mean length of each segments with the direct laryngoscope, videolaryngoscope and fiberoptic bronchoscope at the time of endotracheal intubation. 3. Making a new formula to determine the proper individualized depth of intubation on the basis of the length of segments 4. Virtual experiment : comparing the new formula with conventional method of determining the depth of endotracheal intubation

Interventions

None listed

Study design

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

20 Years to 90 Years

Healthy volunteers

Inclusion criteria

* Patients who are scheduled to take general anesthesia with endotracheal intubation

Exclusion criteria

* Patients undergoing general anesthesia with face mask ventilation or laryngeal mask airway

Design outcomes

Primary

Measure	Time frame	Description
Comparison of Airway Length Between Male and Female	Endotracheal intubation time	Airway length is defined the distance from medial incisor to carina. It is divided into four parts. It is medial incisor to mouth angle, mouth angle to epiglottis tip, epiglottis tip to vocal cords and vocal cords to carina.
Airway Length vs Height in Male	Endotracheal intubation time	—
Airway Length vs Height in Female	Endotracheal intubation time	—

Secondary

Measure	Time frame	Description
Comparison Between Conventional Method and Touch and Read Method for Risk Group of Male	Endotracheal intubation time	Normal group is defined as the patients whose airway length from medial incisor to carina is below 25cm. Conventional method : depth of intubation is 23cm at the medial incisor for male. Touch and read method : depth of intubation is calculated as follow : length from mouth angle to epiglottis tip plus 12.5cm for male.
Comparison Between Conventional Method and Touch and Read Method for Normal Group of Female	Endotracheal intubation time	Normal group is defined as the patients whose airway length from medial incisor to carina is over 23cm. Conventional method : depth of intubation is 21cm at the medial incisor for female. Touch and read method : depth of intubation is calculated as follow : length from mouth angle to epiglottis tip plus 11.5cm for female.
Comparison Between Conventional Method and Touch and Read Method for Normal Group of Male	Endotracheal intubation time	Normal group is defined as the patients whose airway length from medial incisor to carina is over 25cm. Conventional method : depth of intubation is 23cm at the medial incisor for male. Touch and read method : depth of intubation is calculated as follow : length from mouth angle to epiglottis tip plus 12.5cm for male.
Comparison Between Conventional Method and Touch and Read Method for Risk Group of Female	Endotracheal intubation time	Risk group is defined as the patients whose airway length from medial incisor to carina is below 23cm. Conventional method : depth of intubation is 21cm at the medial incisor for female. Touch and read method : depth of intubation is calculated as follow : length from mouth angle to epiglottis tip plus 11.5cm for female.

Countries

South Korea

Participant flow

Participants by arm

Arm	Count
Touch and Read Group(Male) This is a virtual experiment based on the anthropometry of the airway length. We defined the conventional group as patients who are intubated on the depth of 25cm for male and 23 cm fo female from the medial incisor virtually. Touch and read group : Depth of intubation was determined on the measurement of the airway length of each patient. In touch and read group, the depth of intubation was determined by the sum of the length from the mouth angle to epiglottis tip, the length from the epiglottis tip to vocal cords and 8cm for the endotracheal tube #7.0. Length from the mouth angle to epiglottis tip is determined at the time of intubation with specially scaled endotracheal tube.	69
Touch and Read Group(Female) female	107
Total	176

Withdrawals & dropouts

Period	Reason	FG000
Overall Study	Invisible vocal cords	5

Baseline characteristics

Characteristic	Touch and Read Group(Male)	Touch and Read Group(Female)	Total
Age, Categorical <=18 years	0 Participants	0 Participants	0 Participants
Age, Categorical >=65 years	7 Participants	25 Participants	32 Participants
Age, Categorical Between 18 and 65 years	62 Participants	82 Participants	144 Participants
Sex: Female, Male Female	0 Participants	107 Participants	107 Participants
Sex: Female, Male Male	69 Participants	0 Participants	69 Participants

Adverse events

Event type	EG000 affected / at risk	EG001 affected / at risk
deaths Total, all-cause mortality	— / —	— / —
other Total, other adverse events	0 / 71	0 / 110
serious Total, serious adverse events	0 / 71	0 / 110