Table 2.

Situations and complications during placement of external indwelling cannula

	Axillary cannula	Modified interscalene cannula
No	27	33
Single attempt success	23/27 (85.2%)	26/33 (78.8%)
Excellent/good anesthesia	26/27 (96.3%)	32/33 (97%)
Severe intoxication	1/27 (3.7%)	1/33 (3.0%)