He urgently asked the people working in the hospital to answer questions about medical knowledge. Please describe the general situation when a patient suddenly needs blood transfusion during surgery. For writing novels,

When a blood transfusion was suddenly needed, the scene in the surgery would usually become very tense and rushed. Doctors and nurses would quickly assess the patient's blood volume and available blood volume to ensure that the patient had enough blood for transfusion. Doctors and nurses would usually perform a strict examination on the transfused blood to ensure that its quality met the requirements. This included checking the color of the blood, the degree of clumping, the PH value, and other indicators to ensure that the patient would not be affected by adverse reactions after the transfusion. Once it was confirmed that a blood transfusion was needed, the doctor would immediately insert the blood transfusion tube into the patient's venous system to avoid any unnecessary waste of time. At the same time, the doctors and nurses would take appropriate measures according to the patient's condition to protect the patient's heart and blood pressure to ensure that the patient could safely survive after the blood transfusion. During the blood transfusion process, doctors and nurses would constantly monitor the patient's vital signs to ensure that the patient's physical condition could recover steadily after the blood transfusion. If the patient had any adverse reactions after the blood transfusion, the doctors and nurses would take timely measures to ensure the patient's safety and health. When blood transfusion was needed during the operation, doctors and nurses would take all necessary measures to ensure the patient's safety and health and recover the patient's physical condition as soon as possible.