“…Six trials studied the impact of cryoanalgesia in thoracotomy. Of these, two trials compared cryoanalgesia against control treatment with intravenous opioids (Gwak et al, 2004; Sepsas et al, 2013), one trial compared cryoanalgesia to epidural analgesia (Ju et al, 2008), two trials compared the effect of cryoanalgesia versus placebo in thoracotomy patients who all had epidural analgesia (Yang et al, 2004; Mustola et al, 2011) and one trial compared cryoanalgesia to non-divided intercostal muscle flap (Lu et al, 2013). Six trials examined the impact of local anaesthetic; of these, three incorporated infiltration with differing doses of ropivacaine in mastectomy (Albi-Feldzer et al, 2013; Baudry et al, 2003; Vigneau et al, 2011), one trial studied the impact of lidocaine infiltration in thoracotomy patients that already had a thoracic epidural in situ (Cerfolio et al, 2003), one trial examined the effect of intravenous lidocaine (Grigoras et al, 2012) and the remaining one assessed the impact of topical EMLA (eutectic mixture of local anaesthetic) cream in mastectomy patients (Fassoulaki et al, 2000).…”