The Value of Contrast-Enhanced Ultrasound-Guided Contrast Injection via the Endoscopic Nasobiliary Drainage Duct in Diagnosing Residual Common Bile Duct Stones

Table 3

Average observed length and width of the common bile duct before and after saline injection.

	US group		CEUS group
	Length (cm)	Width (cm)	Length (cm)	Width (cm)
Before injection
After injection
value	11.03	10.81	12.39	3.91
value	<0.01	<0.01	<0.01	<0.01