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.
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Sensitivity of Capnography
Timeframe: Through study completion, an average of 2 year
Specificity of Capnography
Timeframe: Through study completion, an average of 2 year
Positive Predictive Value of Capnography
Timeframe: Through study completion, an average of 2 year
Negative Predictive Value of Capnography
Timeframe: Through study completion, an average of 2 year
Overall diagnostic performance of Capnography
Timeframe: Through study completion, an average of 2 year