Hubungan nilai hemoglobin, tekanan parsial oksigen arteri, saturasi oksigen arteri, dan saturasi oksigen vena pascabedah dengan kejadian disfungsi kognitif pascabedah jantung terbuka di RSCM = Association between postoperative haemoglobin, arterial oxygen partial pressure, arterial oxygen saturation, venous oxygen saturation with postoperative cognitive dysfunction after open heart surgery in Cipto Mangunkusumo Hospital