Table 2.

Radiation doses in recent CTO registries and meta-analyses.

	Study type	Characteristics	Year	CTO lesions (n)	Radiation skin injury (%)	Fluoroscopy time
Lin et al. [32]	Retrospective study		2014	516	NR	43 ± 27 # 42 ± 24 ##
El Sabbagh et al. [7]	Metanalysis	Retrograde only	2014	3493	0.5%	82 ± 34
Christopoulos et al. [33]	Registry		2014	496	NR	41 (26-65) *
Michael et al. [34]	Registry		2013	1361	NR	42 ± 29
Karmpaliotis et al. [35]	Registry	Retrograde only	2012	462	NR	61 ± 40
Tsuchikane et al. [36]	Registry	Retrograde only	2013	801	NR	95 ± 52
Patel et al. [37]	Metanalysis		2013	18941	<0.01	NR
Galassi et al. [38]	Registry		2011	1983	NR	42 ± 47
Morino et al. [8]	Registry		2010	528	0	45 (1-301) *
Aguiar-Souto et al. [39]	Retrospective study		2010	227	NR	32 (19-47) *

^#CI-AKI group, ^## non CI-AKI group, CI-AKI: contrast induced acute kidney injury, ^* Median (range)