Device-assisted enteroscopy: A review of available techniques and upcoming new technologies

Table 1 Currently available device-assisted endoscopes: Technical characteristics

DAE System type	Single-balloon enteroscopy	Short-single balloon	Double-balloon enteroscopy	Double-balloon enteroscopy	Short-double balloon	Balloon-guided enteroscopy	Spiral enteroscopy	PowerSpiral enteroscopy
Company	Olympus Tokyo, Japan	Olympus Tokyo, Japan	Fujifilm Corporation Tokyo, Japan	Fujifilm Corporation Tokyo, Japan	Fujifilm Corporation Tokyo, Japan	Smart Medical Systems Raanana, Israel	Spirus Medical, Stoughton, Massachusetts, United States	Olympus Tokyo, Japan
Endoscope model	SIF-Q 180	SIF-H290S	EN-580T	EN-580XP	EI-580BT	No specific scope	No specific scope	PSF-1
Outer diameter distal end of endoscope	9.2 mm	9.2 mm	9.4 mm	7.5 mm	9.4 mm			11.2 mm
Instrument channel inner diameter	2.8 mm	3.2 mm	3.2 mm	2.2 mm	3.2 mm			3.2 mm
Outer diameter of overtube	13.2 mm	13.2 mm	13.2 mm	11.6 mm	13.2 mm		14.5 mm	18.1 mm 31.1 mm (with spiral)
Total length	2345 mm	1830 mm	2300 mm	2300 mm	1850 mm			2015 mm
Working length	2000 mm	1520 mm	2000 mm	2000 mm	1560 mm			1680 mm
Image Enhancement	NBI (Narrow band imaging)	NBI	FICE (Flexible spectral imaging color enhancement)	FICE	FICE	Depend on endoscope used	Depend on endoscope used	NBI

NBI: Narrow band imaging; FICE: Flexible spectral imaging color enhancement.