患者男性,52岁,有溃疡病史10年。最近1周中上腹持续性胀痛,较以往严重,伴恶心、呕吐。今日呕血一次,量约800mL,呕血后气促明显,血压100/75mmHg。该患者目前潜在的护理问题是( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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