57.關於wedge pressure的測量，下列敘述何者錯誤？ (A)當pulmonary capillary pressure大於alveolar pressure時，wedge pressure可以反應LA pressure (B)當pulmonary capillary pressure小於alveolar pressure時，wedge pressure可以反應alveolar pressure (C)PA catheter tip應放置在upper lung region，因為pulmonary capillary pressure會大於alveolar pressure (D)當ballon inflation時，wedge pressure＝pulmonary capillary pressure＝LA pressure