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

Table 2

Comparison of the neck ultrasound and direct radiograph.

		Direct Radiograph		Total	Sensitivity	Specificity	PPV	NPV
		Negative	Positive
Neck US	Negative	2	4	6	91,49%	100%	100%	33.3%
	Positive	0	43	43
Total		2	47	49