New Formula for Selection of Proper Size of Endotracheal Tube (ETT) in Children: Ultrasonographic Examination

New Formula for Selection of Proper Size of ETT in Children: Ultrasonographic Examination

Choosing the adequate size of endotracheal tube(ETT) in pediatric patients is important in all anesthesiologists, pediatricians, and critical care specialists. Inadequate ETT size will results in soft tissue injury to trachea by means of the pressure, insufficient ventilation, and aspiration, therefore choosing the adequate ETT size has very important clinical aspect.

Study Overview

• Status: Completed
• Conditions: Elective Urological Surgery

Detailed Description

Choosing the adequate size of endotracheal tube(ETT) in pediatric patients is important in all anesthesiologists, pediatricians, and critical care specialists. Inadequate ETT size will results in soft tissue injury to trachea by means of the pressure, insufficient ventilation, and aspiration, therefore choosing the adequate ETT size has very important clinical aspect.

Subglottis is the narrowest portion of upper airway. Thus, ETT size should be determined according to the subglottic diameter. Several conventional methods are available to determine ETT size. These methods are based on the demographic data of patient, such as age, weight, height, but could not be customized for each patient. Ultrasonography (US) is one of the most accurate method to measure the subglottic diameter. Also, US is quick, easy to perform, and non-invasive measure. The investigators tried to measure the exact subglottic diameter with US and analyze the correlation of the diameter and demographical data. Furthermore, the investigators will try to develop the equation that could determine the adequate ETT size based on demographical data, instead of actually measuring the subglottic diameter using US.

• Study Type: Observational
• Enrollment (Actual): 215

Contacts and Locations

Study Locations

• Korea, Republic of
  • Seoul, Korea, Republic of, 120-752
    • Severance Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: No older than 7 years (Child)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

• Sampling Method: Probability Sample

Study Population

University Hospital (Severance Hospital, Seoul, S.Korea)

Description

Inclusion Criteria:

• children undergoing elective urological surgeries

Exclusion Criteria:

• children with anatomical airway problem or prematurely delivered children

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort
ultrasonography children; American Society of Anesthesiologists (ASA) I-II children between the age 0-7, undergoing elective urological surgery, such as inguinal hernia repair, orchiopexy, ureteroneocystostomy

Collaborators and Investigators

• Sponsor: Yonsei University

Study record dates

Study Major Dates

• Study Start: February 1, 2010
• Primary Completion (Actual): December 1, 2010
• Study Completion (Actual): February 1, 2011

Study Registration Dates

• First Submitted: October 22, 2010
• First Submitted That Met QC Criteria: October 22, 2010
• First Posted (Estimate): October 25, 2010

Study Record Updates

• Last Update Posted (Estimate): May 13, 2011
• Last Update Submitted That Met QC Criteria: May 12, 2011
• Last Verified: May 1, 2011

More Information

Terms related to this study

• Keywords: general anesthesia; ASA I-II children between the age 0-7
• Other Study ID Numbers: 4-2009-0723