A New Preparation Method for Peroral Endoscopic Myotomy in Patients with Achalasia Can Effectively Reduce the Esophageal Residual Contents: A Comparative Retrospective Study

Table 2

Comparison of the quality of esophagus cleansing between carbonated beverage group and control group in the subtypes according to degree of dilatation.

Degree of dilatation	Carbonated beverage group; Quality of esophagus cleansing				Control group; Quality of esophagus cleansing				value
	Grade A	Grade B	Grade C	Total	Grade A	Grade B	Grade C	Total
Grade I	23	1	0	24	5	3	0	8	0.015
Grade II	16	2	1	19	3	3	1	7	0.044
Grade III	2	3	0	5	0	0	2	2	0.04
Total	41	6	1	48	8	6	3	17	0.001