Perbandingan premedikasi lidokain perlakuan torniket dan campuran lidokain untuk mengurangi derajat nyeri saat induksi anestesi menggunakan propofol di RSSA Malang = Comparison of lidocaine premedication using torniquet with premixed of lidocaine to reduce pain degree during anesthesia induction with propofol in RSSA Malang