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Intraoperative blood salvage (IOS), also known as cell salvage, is a specific type of autologous blood transfusion. Specifically IOS is a medical procedure involving recovering blood lost during surgery and re-infusing it into the patient. It is a major form of autotransfusion.
The latter form of autotransfusion is utilized in surgeries where there is expected a large volume blood loss – e.g. aneurysm, total joint replacement, and spinal surgeries. The effectiveness, safety, and cost-savings of intraoperative cell salvage in people who are undergoing thoracic or abdominal surgery following trauma is not known. [1]
During surgical procedures that are expected to have significant blood loss, blood that is lost during surgery can be collected, filtered, washed and given back to the patient. [18] This procedure is known as intraoperative blood salvage. [19] Pharmacologic agents, for example tranexamic acid, can also be utilized to minimize blood loss. [20]
The Pringle manoeuvre is used during liver surgery and in some cases of severe liver trauma to minimize blood loss. [1] For short durations of use, it is very effective at reducing intraoperative blood loss. [2] The Pringle manoeuvre is applied during closure of a vena cava injury when an atriocaval shunt is placed. [citation needed]
In some surgical procedures (especially some heart operations) where substantial blood loss is expected, machinery is used for intraoperative blood salvage. A centrifuge process takes blood from the patient, washes the red blood cells with normal saline, and returns them to the patient's blood circulation. Hemolysis may occur if the centrifuge ...
There are two primary methods, homologous blood transfusion and autologous blood transfusion, to reduce the massive blood loss resulted from different surgeries. [5] Homologous blood transfusion refers to using blood from other compatible donors to improve the oxygen-carrying capacity for blood by raising the number and concentration of blood ...
[contradictory] Many doctors view acute normovolemic hemodilution, a form of storage of a patient's own blood, as a pillar of "bloodless surgery" but the technique is not an option for patients who refuse autologous blood transfusions. Intraoperative blood salvage is a technique which recycles and cleans blood from a patient during an operation ...
Hemodilution can be normovolemic, which implies the dilution of normal blood constituents by the use of expanders. During acute normovolemic hemodilution (ANH), blood subsequently lost during surgery contains proportionally fewer red blood cells per milliliter, thus minimizing intraoperative loss of the whole blood.