Does the Addition of Tramadol and Ketamine to Ropivacaine Prolong the Axillary Brachial Plexus Block?

Table 2

Characteristics of the patients.

	Group R; 𝑛=12	Group RT; 𝑛=12	Group RK; 𝑛=12
Age (yr)	34.30  ±4.61	39.8±2.83	38.5±3.72
Gender (M/F)	10/2	6/6	12/4
Weight (kg)	68±1.8	71±1.4	67±1.0
Duration of surgery (min)	73.8±10.1	65.2±13.6	81.7±9.3
ASA I/II	10/2	9/3	10/2

Note: values are mean ± SD.