Table 1

Angiographic restenosis rates for different widths and lengths of bare stents

	Stent calibre (mm)
Stent length (mm)	2.25	2.5	2.75	3	3.5	4
Data are derived from the literature, with extrapolation and approximation wherever necessary, and assume a residual in-stent post-procedural stenosis of 10–15%.
Numbers in parentheses indicate the percentage stents of each size used at the Northern General Hospital, Sheffield
The bold numbers represent stent sizes at >15% risk of restenosis in the general patient population, and sufficiently commonly implanted, to be eligible for implantation of a drug eluting stent.
The italicised numbers represent two further stent sizes which, when implanted in diabetic patients (approximately 20% of the PCI population), cross the 15% threshold of restenosis risk.
Other thresholds (for example, 10% or 5%) may be considered and can readily be used to establish which stent sizes are eligible for implantation of a drug eluting stent (see text).
<10	15	11	7	5	3	2
	(0)	(5.5)	(0.9)	(8.3)	(6)	(1.6)

10–14	24	18	11	8	4	3
	(0.2)	(5.8)	(1.4)	(13.1)	(9.7)	(3.4)

15–19		27	16	12	6	4
	(0.2)	(2.3)	(3.2)	(10.8)	(9.9)	(3)

20–24		32	19	14	8	5
	(0)	(0)	(0.2)	(0.9)	(1.2)	(0)

25–29		39	23	17	9	6
	(0)	(0.9)	(0)	(4.1)	(3.4)	(1.4)

30–34		48	27	21	11	8
	(0)	(0)	(0)	(0.2)	(0)	(0)

>35		54	33	24	13	9
	(0)	(0)	(0)	(0.2)	(0)	(0.2)