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Internal Jugular Vein Respiratory Variability as a Marker of Disease Severity in Infant Bronchiolitis
Sponsor: Eskisehir Osmangazi University
Summary
This prospective observational cohort study evaluates whether respiratory-cycle variation in internal jugular vein (IJV) diameter, measured by point-of-care ultrasound, correlates with clinical disease severity in infants 1-23 months of age presenting with acute bronchiolitis. Using a standardized M-mode protocol, the IJV Variability Index (\[IJVmax-IJVmin\]/IJVmax x 100) will be calculated and compared with the Wang Bronchiolitis Severity Score, four additional validated clinical severity instruments (Modified Tal Score, Respiratory Distress Assessment Instrument, Kristjansson Respiratory Score, Respiratory Assessment Change Score), oxygen saturation, respiratory rate, need for high-flow nasal cannula or supplemental oxygen, pediatric intensive care unit admission, and length of hospital stay. Concurrent lung and diaphragm point-of-care ultrasound will be performed to build a multimodal ultrasound severity model. No intervention is assigned; all ultrasound assessments are performed in addition to standard clinical care and do not alter treatment decisions.
Official title: Respiratory Variation of Internal Jugular Vein Diameter as a Novel Ultrasonographic Marker of Disease Severity in Infants With Acute Bronchiolitis: A Prospective Observational Cohort Study
Key Details
Gender
All
Age Range
1 Month - 23 Months
Study Type
OBSERVATIONAL
Enrollment
120
Start Date
2026-09-01
Completion Date
2027-08-31
Last Updated
2026-08-21
Healthy Volunteers
No
Interventions
Point-of-Care Ultrasonography
A standardized point-of-care ultrasonography assessment will be performed in addition to routine clinical evaluation. The protocol includes M-mode assessment of the right internal jugular vein (IJV) to measure maximal and minimal respiratory-cycle diameters and calculate the IJV Variability Index (\[IJVmax-IJVmin\]/IJVmax × 100). Concurrent lung ultrasonography and diaphragm ultrasonography, including diaphragm excursion and thickening fraction, will also be performed. Ultrasonographic assessments are performed for research measurements only and do not determine or modify clinical treatment decisions.
Locations (1)
Eskisehir Osmangazi University Faculty of Medicine, Pediatric Emergency Department
Eskişehir, Eskişehir, Turkey (Türkiye)