Are there alternatives to blood transfusions?

Although blood transfusions are fairly common there are risks to them so they should really only be used when absolutely necessary. In addition because blood supplies are limited it is possible that there will be no blood available. Fortunately there are some alternatives to blood transfusions that may be available in some cases.

One alternative that you have to blood transfusions may be volume expanders, this is simply a way to get fluid back into your system when you have lost a lot of blood. This is most common with people who have lost blood as the result of a traumatic injury. In most cases they don't actually need the red blood cells or the platelets of a transfusion, they just need more fluid to keep the ones that they already have circulating properly. This is usually done with a saline solution, which is just salt water. This approach does not work if you have a disease that requires a blood transfusion.

An option in the case of a disease that requires a blood transfusion is growth factors. Your body is constantly making blood cells and platelets however in many cases of disease this does not happen which is why the transfusion is necessary. Growth factors are a way to artificially stimulate your body into making these blood cells so that you don't require a transfusion. The disadvantage to this approach is that it takes time, usually a few weeks for the cells to grow meaning that the procedure is not effective for patients who need to raise their blood cell levels quickly.

In cases where you need blood because of surgery it may be possible to give you back your own blood. This is done by collecting the blood that is lost during the surgery and then giving it back to you rather than using somebody else's blood. This only works for some surgeries as there is a special machine that is required to capture the blood and this can't be used during all procedures. There is also some evidence to suggest that there may be a risk of tumors getting into the blood during cancer surgery so this procedure is generally not used in those situations either.

There is a great deal of research going on to develop blood substitutes but so far they have met with limited success. There are some that have been developed but they are only for short term use and are really just meant as a stop gap until a proper transfusion can take place. These substitutes are normally used when somebody has a rare blood type and time is required to find a donor or if the patient is far from a hospital and there is a need to buy time for a transfusion. The army uses them for wounded soldiers on the battlefield for example.