What is post transfusion purpura?

Post-transfusion purpura (PTP) is a delayed adverse reaction to a blood transfusion or platelet transfusion that occurs when the body has produced alloantibodies to the allogeneic transfused platelets' antigens. PTP usually presents 5–12 days after transfusion, and is a potentially fatal condition in rare cases.

In this regard, what is the cause of post transfusion purpura?

It occurs after transfusion of any platelet-containing product (red blood cells or platelets) causing acute profound thrombocytopenia [1]. It is caused by alloimmunization against platelet antigens, anti-human platelet antigen-1a (HPA-1a) being the most frequent antibody involved [2].

Beside above, can blood transfusions cause thrombocytopenia? Post-transfusion purpura (PTP) is a rare yet serious disease characterized by severe thrombocytopenia occurring after a blood transfusion. It is caused by alloimmunization against platelet antigens, anti-HPA-1a being the most frequent antibody. No platelet transfusions were needed.

Also question is, what is transfusion reaction?

Transfusion reactions are defined as adverse events associated with the transfusion of whole blood or one of its components. Reactions can occur during the transfusion (acute transfusion reactions) or days to weeks later (delayed transfusion reactions) and may be immunologic or non-immunologic.

What is in a blood transfusion?

A blood transfusion is a common, safe medical procedure in which healthy blood is given to you through an intravenous (IV) line that has been inserted in one of your blood vessels. Four types of blood products may be given through blood transfusions: whole blood, red blood cells, platelets, and plasma.

What is TTP?

Thrombotic thrombocytopenic purpura (TTP) is a rare blood disorder. In TTP, blood clots form in small blood vessels throughout the body. The clots can limit or block the flow of oxygen-rich blood to the body's organs, such as the brain, kidneys, and heart. As a result, serious health problems can develop.

What is a feature of delayed hemolytic reaction?

Delayed hemolytic transfusion reactions (DHTRs) present with red blood cell hemolysis from 2 days to several months after a transfusion. Symptoms and signs include fever, mild jaundice, and an inexplicable decline in hemoglobin concentration.

What does PTP mean in medical terms?

Post-transfusion purpura

What is platelet refractoriness?

Platelet transfusion refractoriness is the repeated failure to achieve the desired level of blood platelets in a patient following a platelet transfusion. The cause of refractoriness may be either immune or non-immune. Among immune-related refractoriness, antibodies against HLA antigens are the primary cause.

How do you get Trali?

TRALI is thought to be caused by activation of recipient neutrophils by donor-derived antibodies targeting human leukocyte antigen (HLA) or human neutrophil antigen (HNA), in most cases.

What is transfusion associated circulatory overload?

Transfusion-associated circulatory overload (TACO) is a common transfusion reaction in which pulmonary edema develops primarily due to volume excess or circulatory overload. General approach – (See "Approach to the patient with a suspected acute transfusion reaction".)

What causes blood transfusions?

What causes the transfusion reaction? Antibodies in the recipient's blood can attack the donor blood if the two are not compatible. If the recipient's immune system attacks the red blood cells of the donor, it is called a hemolytic reaction. You can have an allergic reaction to a blood transfusion as well.

Is there splenomegaly in ITP?

ITP manifests as a bleeding tendency, easy bruising (purpura), or extravasation of blood from capillaries into skin and mucous membranes (petechiae). Splenomegaly excludes the diagnosis of ITP.

What are the types of transfusion reactions?

Blood Transfusion Reactions

• Acute Haemolytic Transfusion Reaction.
• Febrile Reactions.
• Allergic Reactions.
• Transfusion-Transmitted Infection.
• Transfusion-Related Acute Lung Injury.
• Transfusion-Associated Circulatory Overload.
• Delayed Haemolytic Transfusion Reactions.
• Transfusion-Associated Graft-Versus-Host Disease.

What is the most dangerous type of blood transfusion reaction?

The most common immediate adverse reactions to transfusion are fever, chills and urticaria. The most potentially significant reactions include acute and delayed haemolytic transfusion reactions and bacterial contamination of blood products.

What is the most common transfusion reaction?

Febrile non-hemolytic transfusion reactions are the most common reaction reported after a transfusion. FNHTR is characterized by fever or chills in the absence of hemolysis (breakdown of red blood cells) occurring in the patient during or up to 4 hours after a transfusion.

How many transfusions can you have?

If your body is missing one or more of the components that make up healthy blood, a transfusion can help supply what your body is missing. Depending on how much blood you need, a transfusion can take between 1 and 4 hours. About 5 million Americans need a blood transfusion every year, and the procedure is usually safe.

How do you prevent a febrile transfusion reaction?

The best way to prevent severe febrile reactions is to use prestorage leukocyte reduced red blood cells and apheresis platelets. If a patient continues to have febrile reactions to leukocyte reduced single donor platelets, it may be helpful to remove plasma from the platelet unit immediately prior to transfusion.

How long after blood transfusion can you have a reaction?

Not all hemolytic reactions occur during or shortly after blood transfusion. The so-called “delayed” hemolytic reaction commonly occurs 4 - 8 days after blood transfusion, but may develop up to 2 weeks later.

How often do transfusion reactions occur?

If no additional RBC antigen stimulus occurs, the antibody can become undetectable in 50% of patients within 5 years. Following renewed exposure to the same antigen, a more rapid antibody response can occur from 3 to 21 days later. Peak antibody production usually occurs between 7 and 10 days after exposure.

What is the most common cause of transfusion related fatalities?

Today, the leading causes of allogeneic blood transfusion (ABT)– related mortality in the United States—in the order of reported number of deaths—are transfusion-related acute lung injury (TRALI), ABO and non-ABO hemolytic transfusion reactions (HTRs), and transfusion-associated sepsis (TAS).

What is the most common cause of severe or fatal transfusion reactions?

The incidence of transfusion reactions is approximately 1 : 5000 units transfused, and fatal transfusion reactions occur at a rate of 1 : 100,000 units transfused. Most severe reactions result from ABO incompatibility. The most common cause of transfusing ABO-incompatible blood is clerical error.