A client with peptic ulcer disease (PUD) is admitted to the medical unit. Which assessment finding requires the most immediate intervention by the nurse?

A haemoglobin of 12 g/dL (7.45 mmol/L) and haematocrit of 42% (0.42 volume fraction).

Vital signs are temperature 99.0°F (37.2°C) orally, heart rate 94 beats/minute, respirations 18 breaths/minute, blood pressure 110/70 mm Hg.

Vomits coffee-grounds emesis.

Reports having sharp epigastric pain.