Brief Title
Estimating Length of Endotracheal Tube Insertion Using Gestational Age or Nasal-Tragus Length in Newborn Infants
Official Title
Gestational Age Versus Nasal-tragus Length for Estimating Endotracheal Tube Insertion Depth in Newborns - A Randomised Trial
Brief Summary
Endotracheal intubation is a life-saving intervention that few infants need after birth.
Although an endotracheal tube is the most reliable way of providing positive-pressure breath,
the critical factor that determines the maximal efficacy of positive-pressure ventilation is
the optimal placement of the endotracheal tube tip. There are various methods available to
determine the initial depth of endotracheal tube (ETT) that are based on the infant's birth
weight, gestational age, anthropometric measurements, and others include vocal cord guide and
suprasternal palpation methods.
The Neonatal Resuscitation Program (NRP) textbook, in its 7th edition of the textbook,
recommends a gestational age chart and nasal-tragus length method for estimating endotracheal
tube insertion depth during cardiopulmonary resuscitation of the neonate. The evidence to
support these two methods is, however, limited. Hence, we designed this study to determine
the accuracy of two methods, gestational age chart and nasal-tragus length method,
recommended by the Neonatal Resuscitation Program.
Detailed Description
Trial Objective: To determine whether estimating ETT insertion depth using gestational age
chart rather than nasal-tragus length method results in more correctly positioned ETT tips.
Setting: The neonates will be recruited from multiple tertiary-level neonatal intensive care
units in Saudi Arabia. A neonate can participate in more than one clinical trial, depending
on the interventions being given. Parallel run trials will be discussed between the chief and
local principal investigators whether or not joint recruitment is feasible to both parties.
Informed Consent: We will obtain written consent after the parents have been given a full
verbal explanation and written description. We will explain to the parents in their own
native language. We will use a hospital-based adult interpreter wherein required. We will
obtain deferred consent (after initial verbal assent) where prior consent is not feasible as
the study does not involve additional risk or investigations to the participants, and the
interventions are otherwise considered as standard practice recommendations by the NRP.
Data Safety Monitoring Board: Any unexpected serious events (death, any life-threatening
event, any event that will prolong the hospitalization or any event that will result in
disability) will be reported to the data safety monitoring committee. The trial steering
committee will receive recommendations from the data safety monitoring board if the trial
requires early termination following the interim data analyses and evidence from relevant
studies. The following measures were agreed to consider stopping the trial, wholly or partly
(subgroups), after an interim analysis, that will be done after recruiting 200 participants.
1. An absolute difference of greater than or equal to 25% in the primary outcome between
the study groups.
2. An absolute difference of less than 5% in the primary outcome between the study groups.
3. A rate of less than 20% in the primary outcome in either of the groups.
Sample Size: Our unpublished data showed using the nasal-tragus length method results in 35%
of correctly positioned ETT tips in term and preterm infants. The data is similar to the
randomized and non-randomized studies that showed an accuracy between 32 and 37 percent using
the nasal-tragus length method. With 90% power and two-sided 5% significance, to detect an
absolute increase in optimally positioned ETT tips of 15%, we will require 454 participants.
We calculated sample size using nQuery Advisor Sample Size Calculator version 8.3.0.0.
Statistical Analysis: We will analyze the data based on the intention-to-treat principle.
Univariate analyses will be performed to compare baseline demographic factors between the two
groups. A mean with standard deviation (normal data) or median with interquartile range
(skewed data) will be obtained for continuous variables and numbers and percentages for
categorical variables. Independent T-test (normal data) or Mann Whitney U test (skewed data)
for continuous variables and chi-square test (or Fisher's exact test as appropriate) for
categorical variables will be used for analyses between the groups. Statistical Analysis
Software version 9.4 will be used for the conduct of all analyses.
Analysis of primary outcome: Adjusted risk ratios of a successful outcome will be calculated
along with 95% confidence intervals. Adjusted ratios will be determined by way of
multivariable logistic regression analysis, including co-variates deemed biologically to have
an influence on the primary outcome (gestational age, small for gestational age, and center).
Principles of best model practices will be followed (including assessment of collinearity
amongst included variables) as well as the determination of the predictive ability of the
model using area under the curve.
Analysis of secondary outcomes: Similar analyses as above will be performed for all secondary
outcomes that are categorical variables. The risk ratios of secondary outcomes mortality,
oxygen therapy at 28 days, pneumothorax, and bronchopulmonary dysplasia will be adjusted
based on the following variables: gestational age, male sex, small for gestational age,
maternal hypertension, chorioamnionitis, antenatal steroids, and center if the P-value is
less than 0.25 on univariate analysis.
Study Type
Interventional
Primary Outcome
Proportion of infants with optimally positioned endotracheal tube tip on the chest X-ray
Secondary Outcome
Proportion of infants with endotracheal tube tip above T1 vertebra
Condition
Endotracheal Tube Tip Position
Intervention
Gestational Age Chart Method
Study Arms / Comparison Groups
Gestational Age Chart Method
Description: In this method, the endotracheal tube insertion depth is obtained from the gestational age chart provided in the 7th edition textbook of neonatal resuscitation program (adapted from Kempley et al. PubMed identifier number: 18372092)
Publications
* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.
Recruitment Information
Recruitment Status
Other
Estimated Enrollment
454
Start Date
June 24, 2020
Completion Date
September 2022
Primary Completion Date
June 2022
Eligibility Criteria
Inclusion Criteria:
- Infants (less than 28 days of life) between 23 weeks 0 days and 41 weeks 6 days
gestational age
- Infants requiring oral intubation in the delivery room or in neonatal intensive care
unit
Exclusion Criteria:
- Infants with major chromosomal anomalies, including trisomy 13, trisomy 18, and
trisomy 21
- Infants with major anomalies, including craniofacial anomalies and facial dysmorphism
that may affect the nasal-tragus length
Gender
All
Ages
N/A - 28 Days
Accepts Healthy Volunteers
No
Contacts
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Location Countries
Saudi Arabia
Location Countries
Saudi Arabia
Administrative Informations
NCT ID
NCT04393337
Organization ID
20-0148
Responsible Party
Principal Investigator
Study Sponsor
Princess Nourah Bint Abdulrahman University
Collaborators
King Fahad Medical City
Study Sponsor
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Verification Date
September 2020