Preclinical trial of the effectiveness of a safety nasogastric tube to detect the tube position based on tidal volume and pepsin assay results in the gastrointestinal tract of Macaca fascicularis

Table 2 Differences between the SNGT 50% TV and SNGT 100% TV using a confirmatory test for detecting the tube position

No	Tube	Airbag movement	Laryngoscopic examination		Thornier-Remain
No	Tube	Airbag movement	Gastrointestinal tract	Respiratory tract	Sensitivity (%)	Specificity (%)
1	SNGT 50% TV	Absent	8	0	100	100
1	SNGT 50% TV	Present	0	8	100	100
2	SNGT 100% TV	Absent	7	0	87.5	100
2	SNGT 100% TV	Present	1	8	87.5	100

ISSN: 1475-925X