Measurement of the Distances of the Lower Airway in Pediatric Population

Measurement of the Distance Between the Orifice of the Right Upper Lobe and Carinae and Labium Oris With Fiberoptic Bronchoscopy in Pediatric Population in Turkey

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT04533334

Enrollment

299

Registered

2020-08-31

Start date

2019-01-09

Completion date

2021-01-09

Last updated

2023-05-03

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

Conditions

Airway, Bronchus, Child

Keywords

anesthesia, fiberoptic bronchoscopy, lower airway anatomy, child, right upper lobe bronchus

Brief summary

Pediatric patients are exposed to increased risk during general anesthesia. A myriad of problems can be encountered in the pediatric population by misplaced endotracheal tubes. Especially, during one-lung ventilation (OLV) a right-sided or left-sided tube is inserted to facilitate the surgery. However, inadvertent tube use, caused by misinterpretation of the distances of the trachea and the main bronchi, may cause unintended hypoxemia, postoperative atelectasis and even mortality. In this study, investigators will measure the distance between distal margin of right lung upper lobe orifice-carina and carina-lip with the help of fiberoptic bronchoscopy (FOB).

Detailed description

In ASA-PS I-II-III children between 1-18 years of age who are orotracheally intubated for any reason, the fiber optic bronchoscope will be advanced in the tube and first the carina distance and then the carina to right upper bronchus distance will be measured. Age, weight, height, body mass index (BMI), weight percentile, height percentile, comorbidities, ASA score, tube size, lip margin distance, right upper bronchus to carina distance and right upper lobe to carina distance/ Carina to-lip margin ratio will be recorded.

Interventions

PROCEDUREFOB measurement

A FOB will be inserted after anesthesia induction and the distances will be measured by direct observation via the bronchoscope.

Study design

Observational model

COHORT

Time perspective

PROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

1 Years to 18 Years

Healthy volunteers

Inclusion criteria

* All patients undergoing general anesthesia via an endotracheal tube * ASA I-III

Exclusion criteria

* Patients that do not meet age criteria * Uncontrolled asthma or hyper reactive airway * hypoxemia, previous thoracic surgery * ASA \> III * Unstable hemodynamics * Patients with tracheal or oral malignancies * Patients with face trauma * Informed consent not given * using a tube with a number too small for the fiberoptic bronchoscope to pass through

Design outcomes

Primary

Measure	Time frame	Description
Upper/Lower Airway Ratio	1 day	Ratio of the distance between labium oris to carina and carina to right upper lobe orifice

Secondary

Measure	Time frame	Description
Correlation between patient characteristics and distances measured by FOB	1 day	Correlation between age, body mass index, gender, percentiles and the distance between labium oris to carina and carina to right upper lobe orifice

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026