At midnight in SereneCare Hospital, a nurse diligently checked on Zach, who was lying on the bed, unconscious. Unexpectedly, she noticed the machine monitoring his heart rate decline gradually. She then immediately pressed the emergency call button.

The on-duty doctor rushed over, asking, "What happened? What's the current condition of the patient?"

The nurse anxiously explained, "His wound still hasn't healed even after a long time. I was just about to administer medication to him when I noticed a significant amount of bleeding from his wound. I've already asked another nurse to fetch blood bags from the blood bank."

The doctor responded, "Contact Dr. Griver immediately and ask her to come perform surgery on this patient. This surgery has been delayed for too long; we can't afford any more delays."

The nurse replied, "But Dr. Griver mentioned in the last meeting that there's a sharp fragment near the patient's heart. It's not easy to remove, and the slightest mistake could cut thr