Verifying the Placement of Nasogastric Tubes at an Emergency Center: Comparison of Ultrasound with Chest Radiograph

Table 6

Comparison of the neck ultrasound + subxiphoid ultrasound + air-water mixture + auscultation with direct radiograph.

		Direct Radiograph		Total	Sensitivity	Specificity	PPV	NPV
		Negative	Positive
Neck US + Subxiphoid US + Air-Water + Auscultation	Negative	2	1	3	97.87%	100%	100%	66.67%
	Positive	0	46	46
Total		2	47	49