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Diagnostic Accuracy of Using Point-of-care Ultrasonography for Confirming Nasogastric Tube Placement
Sponsor: Pamela Youde Nethersole Eastern Hospital
Summary
A prospective observational diagnostic study will be conducted to assess the sensitivity and specificity of ultrasound in verifying the correct nasogastric tube placement, using X-ray as the reference standard.
Official title: Diagnostic Accuracy of Using Point-of-care Ultrasonography for Confirming Nasogastric Tube Placement: a Multicentre Prospective Study
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
OBSERVATIONAL
Enrollment
530
Start Date
2025-04-28
Completion Date
2028-10
Last Updated
2025-07-09
Healthy Volunteers
No
Interventions
Diagnostic ultrasound
A portable wireless ultrasound system (Vscan Air, General Electric Healthcare) with dual probes-linear array (3-12 MHz) for neck scanning and curved array (2-5 MHz) for subxiphoid scanning-will be used. The linear probe is placed transversely on the anterior neck, slid left at the thyroid level to focus on the esophagus, then rotated for longitudinal views. The curved probe is applied subxiphoid, using the liver as a landmark, and tilted left to image the stomach. A positive result is confirmed by visualizing the NGT shadow in the esophagus and stomach, followed by dynamic upsurge fogging after injecting 50cc of air. Ultrasonography and X-ray results will be compared.
Diagnostic X-ray
This study will employ chest radiography as the reference standard for verification of correct nasogastric tube placement. Radiographic imaging will be conducted following NGT insertion and interpreted by physicians to verify positional accuracy.
Locations (1)
Hospital Authority, HKSAR
Hong Kong, Hong Kong