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Diagnostic Accuracy of Capnography in Nasogastric Tube Placement
Sponsor: Chinese University of Hong Kong
Summary
A prospective observational diagnostic study will be conducted to assess the sensitivity and specificity of using capnography in detecting the correct placement of nasogastric tubes using the reference standards of radiography and measurement of aspirates for pH value.
Official title: Diagnostic Accuracy of Using Capnography in Verification of Nasogastric Tube Placement in Hospital Settings
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
OBSERVATIONAL
Enrollment
390
Start Date
2023-07-01
Completion Date
2025-12
Last Updated
2024-09-05
Healthy Volunteers
No
Interventions
Capnography
Index test: Capnography, which monitors ETCO2, the percentage concentration, or partial pressure of CO2 at the end of exhalation, will serve as the index test. It will be performed by connecting the end of the nasogastric tube with the sensor of the bedside sidestream capnography device. Placement within the airway is defined as detecting a capnogram waveform or an ETCO2 level \> 10 mmHg. Reference standard: This study will use radiography (chest/abdominal X-ray) as the reference standard for determining the correct placement of nasogastric tubes. Radiology will be performed as soon as possible and interpreted by a physician. A repeat radiography will be performed if necessary. We will also use pH-Fix-4.5-10 to determine the pH value, and its accuracy is +/- 0.2 pH with minimum increments of 0.5. A pH of 5.5 or below indicates gastric placement.
Locations (1)
The Chinese University of Hong Kong
Hong Kong, Hong Kong SAR, China