Drug-eluting fully covered self-expanding metal stent for dissolution of bile duct stones in vitro

Table 1 Parameters of drug-eluting stents manufactured by three different methods (mean ± SD)

	Drug-loaded material	Drug load (mg)	Coating mass (mg)	Coating thickness (mm)	Drug-loading efficiency (%)
Stent I (n = 6)	PCL	50	49.78 ± 0.09b	0.48 ± 0.05b	50
Stent II (n = 6)	PCL	50	74.98 ± 0.12f	0.79 ± 0.05f	33.3
Stent III (n = 6)	PCL	50	50.01 ± 0.11	0.57 ± 0.03	50

PCL: Polycaprolactone. Stent I vs Stent II, ^aP < 0.05,

^bP < 0.01; Stent I vs Stent III, ^cP < 0.05, ^dP < 0.01; Stent II vs Stent III, ^eP < 0.05,

^fP < 0.01.