How is intraoperative blood loss quantified and managed, including transfusion thresholds?

• A. Blood loss is not estimated; transfusion decisions are based solely on vital signs.
• B. Estimate via suction canister measurements and sponge counts; use cell saver as needed; transfusion decisions guided by Hb/clinical status and comorbidity.
• C. Blood loss cannot be estimated.
• D. Transfusion decisions are based on Hb levels only.

Answer: (B)

Intraoperative blood management relies on both measuring blood loss and using clinical judgment to decide about transfusion. Blood loss is estimated by recording the volume in suction canisters (subtracting irrigation fluids) and by counting and weighing sponges to estimate how much blood the gauze absorbed. This combination gives a practical estimate of total blood loss during the operation. If available, a cell saver can collect shed blood, process it, and reinfuse it back to the patient, which helps reduce exposure to allogeneic donors.

Transfusion decisions are not based on hemoglobin alone. They depend on the patient’s hemoglobin level plus their clinical status and comorbid conditions. In a stable adult without significant cardiac disease, a more restrictive transfusion threshold around 7 g/dL is commonly used. However, if the patient has cardiovascular disease, significant ongoing bleeding, symptoms of anemia, or other risk factors, the threshold may be higher and decisions should be guided by signs of inadequate perfusion (blood pressure, urine output, mental status), ongoing blood loss, and overall clinical context.