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  Indian J Med Microbiol
 

Figure 5: The Bland-Altman analysis plot showing the difference between the procedural depth and the ultrasound estimated depth along Y-axis which is plotted against the average depth on X-axis. The solid lines represent the mean difference of 0.154 cm in loss of resistance group (left) and 0.171cm in acoustic puncture assist device group (right), 95% confidence interval varies from − 0.5301 to 0.2221 cm in loss of resistance group and − 0.5694 to 0.2266 cm in acoustic puncture assist device group

Figure 5: The Bland-Altman analysis plot showing the difference between the procedural depth and the ultrasound estimated depth along Y-axis which is plotted against the average depth on X-axis. The solid lines represent the mean difference of 0.154 cm in loss of resistance group (left) and 0.171cm in acoustic puncture assist device group (right), 95% confidence interval varies from − 0.5301 to 0.2221 cm in loss of resistance group and − 0.5694 to 0.2266 cm in acoustic puncture assist device group