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1
Chau et al assessed capnography for detecting airway placement of nasogastric tubes in 508 patients across 21 hospitals.
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2
The authors’ hypothetical model estimated savings of HK$210.3 per patient by excluding radiography costs for 485 patients with ETCO₂ of 5 mmHg or less.
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3
Capnography can rule out airway placement but does not confirm accurate tube position, and the cost model did not specify subsequent confirmation procedures.
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4
At least 279 of 485 patients with negative capnography had unavailable aspirate or aspirate pH greater than 5.5, based on reported marginal counts.
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5
The authors are asked to report joint capnography, aspirate, pH, and radiographic results and recalculate costs for a specified pathway, including required confirmation procedures.
