Table 2.

Initial effiacy of pneumatic dilation in the treatment of achalasia

Ref.	Dilator-system	n	Symptomatic response	Perforation rate
Chuah et al[52]	Rigiflex	32	91%	3%
Eckardt et al[61]	Brown-McHardy	54	78%	2%
Wehrmann et al[62]	Rigiflex	40	88%	3%
Csendes et al[73]	Mosher	39	65%	5%
Stark et al[103]	Brown-McHardy	10	100%	0%
Parkman et al[104]	Brown-McHardy	123	88%	2%
Coccia et al[105]	Rider-Moeller	16	75%	0%
Bourgeois et al[106]	Rider-Moeller	53	80%	4%
Gelfand et al[107]	Rigiflex	24	83%	0%
Vaezi et al[108]	Rigiflex	20	75%	5%
Rai et al[109]	Rigiflex	56	89%	0%