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

Table 5

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

		Direct Radiograph		Total	Sensitivity	Specificity	PPV	NPV
		Negative	Positive
Neck US  + Subxiphoid US  + Air-Water Mixture	Negative	2	2	4	95.74%	100%	100%	50%
	Positive	0	45	45
Total		2	47	49