concealed hemorrhage

例句：

1. 1. The patient's condition worsened after the surgery, and a concealed hemorrhage was discovered during the examination.
   手术后，患者的病情恶化，检查中发现有隐蔽性出血。
2. 2. The doctor advised the patient to seek medical attention immediately for any concealed hemorrhage.
   医生建议患者立即就医，因为可能存在任何隐蔽性出血。
3. 3. The investigation revealed that the concealed hemorrhage was caused by an undetected infection in thepatient's bloodstream.
   调查发现，隐蔽性出血是由患者血液中未被发现的感染引起的。