Table 3.

Summary of regional techniques investigated in included studies.

Blocks studied	Number of studies	Studies
Supraclavicular	2	Subramanyam et al. [28]; Bharti et al. [14]
Interscalene	5	Bengisun et al. [39]; Fritsch et al. [21]; Salviz et al. [33]; Stundner et al. [27]; Zhai et al. [22]
Pectoral	1	Kulhari et al. [36]
Serratus-intercostal	1	Kim et al. [42]
Fascia iliaca	1	Diakomi et al. [18]
Femoral	6	Sato et al. [31]; Wegener et al. [24]; Choi et al. [17]; Thybo et al. [26]; Nagafuchi et al. [34]; Elkassabany et al. [19]
Sciatic	4	Sato et al. [31]; Wegener et al. [25]; Wegener et al. [24]; Moura et al. [35]
Adductor	1	Sawhney et al. [32]
Saphenous	1	Andersen et al. [13]
Cervical plexus	2	Sindjelic et al. [30]; Karthikeyan et al. [37]
Lumbar plexus	2	YaDeau et al. [40]; Siddiqui et al. [41]
Thoracic epidural	1	Wongyingsinn et al. [23]
Spinal	1	Boussofara et al. [15]
Interscalene catheter	3	Hamdani et al. [38]; Capdevilla et al. [16]; Fredrickson et al. [20]
Popliteal catheter	2	Capdevilla et al. [16]; Schoenmakers et al. [29]
Sciatic catheter	1	Ambrosoli et al. [12]