Efektivitas ajuvan pada bupivakain 0,125 12,5 mg epidural untuk analgesia pascaoperasi ekstremitas bawah di RSUPN Cipto Mangunkusumo: perbandingan penambahan deksametason 8 MG dan penambahan morfin 2 MG = An effectiveness of adjuvant following 0 125 bupivacaine 12 5 MG through epidural for post operative analgesia after lower extremity surgery at RSCM comparison between dexamethasone 8 Mg and morfin 2 MG addition