Ultrasound Guided Stellate Ganglion Block in Postmastectomy Pain Syndrome: A Comparison of Ketamine versus Morphine as Adjuvant to Bupivacaine

Table 2

VAS pain values before and after injections in between the three groups values are mean ± SD.

Injection time (𝑛=59)	Group 1	Group 2	Group 3
	(𝑛=20)	(𝑛=19)	(𝑛=20)
Before injection	7.8 ± 0.74	7.6 ± 0.68	7.8 ± 0.81
After the 1st injection	2.7 ± 0.85	0.8 ± 0.76**	2.4 ± 0.75
After the 2nd injection	2.0 ± 0.79	0.9 ± 0.65**	2.2 ± 0.71
After the 3rd injection	1.9 ± 0.85	0.5 ± 0.5**	2.2 ± 0.52
Two weeks after last injection	2.4 ± 0.68	0.73 ± 0.56**	2.60 ± 0.68
One month after last injection	2.6 ± 0.67	0.9 ± 0.7**	2.8 ± 0.67
Two months after last injection	3.4 ± 1.34	1.1 ± 0.65**	3.0 ± 0.56
Three months after last injection	3.7 ± 1.15	1.2 ± 0.73**	3.5 ± 1.05

∗∗VAS pain values were significantly less in group 2 compared to groups 1 and 3.