Single Unit Transfusion
Single unit transfusion refers to transfusing a single unit or bag of blood product to a person who is not bleeding and haemodynamically stable followed by an assessment to see if further transfusion is required.. The benefits of single unit transfusion include reduced exposure to blood products. Each unit transfused increases the associated risks of transfusion such as infection, transfusion associated circulatory overload and other side effects. Transfusion of a single unit also encourages less wastage of blood products and can be cost-effective. Single unit transfusion can be as part of an institutional or national guidelines and instituted with the help of a transfusion committee or transfusion practitioner. Education of medical staff is important and catch phrases such as "Why use two when one will do", "every ONE matters" or "one bag is best - then reassess" have been used. Red blood cells Following one bag of Packed red blood cells, red blood cells, symptom relief is assessed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Transfusion Associated Circulatory Overload
In transfusion medicine, transfusion-associated circulatory overload (aka TACO) is a transfusion reaction (an adverse effect of blood transfusion) resulting in signs or symptoms of excess fluid in the circulatory system (hypervolemia) within 12 hours after transfusion. The symptoms of TACO can include shortness of breath (Shortness of breath, dyspnea), low blood oxygen levels (hypoxemia), leg swelling (peripheral edema), high blood pressure (hypertension), and a high heart rate (tachycardia). It can occur due to a rapid transfusion of a large volume of blood but can also occur during a single red blood cell transfusion (about 15% of cases). It is often confused with transfusion-related acute lung injury (TRALI), another transfusion reaction. The difference between TACO and TRALI is that TRALI only results in symptoms of respiratory distress while TACO can present with either signs of respiratory distress, peripheral leg swelling, or both. Risk factors for TACO are diseases that inc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Transfusion Practitioner
A transfusion practitioner (TP ''"Tee Pee"'', also known as Transfusion Nurse, Transfusion Safety Officer, Haemovigilance Officer, PBM Practitioner and PBM Nurse) is one with a critical role to play in developing a culture of transfusion safety, appropriateness, and Patient Blood Management (PBM) within healthcare establishments. The role is undertaken by a range of healthcare professionals, with many having nursing or science qualifications. The work of the TP varies across countries and in organisations, some are sole practitioners and others work as part of a team. Much of their work involves ensuring current clinical practices align with state, national, and international guidelines and standards. Transfusion Practitioners improve transfusion practice by promoting safe transfusion practice in a variety of ways. The varied activities of the TP can include: * transfusion education to clinical colleagues * providing transfusion information for patients and families * risk managemen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Packed Red Blood Cells
Packed red blood cells, also known as packed cells, are red blood cells that have been separated for blood transfusion. The packed cells are typically used in anemia that is either causing symptoms or when the hemoglobin is less than usually 70–80 g/L (7–8 g/dL). In adults, one unit brings up hemoglobin levels by about 10 g/L (1 g/dL). Repeated transfusions may be required in people receiving cancer chemotherapy or who have hemoglobin disorders. Cross-matching is typically required before the blood is given. It is given by injection into a vein. Side effects include allergic reactions such as anaphylaxis, red blood cell breakdown, infection, volume overload, and lung injury. With current preparation methods, the risk of viral infections such as hepatitis C and HIV/AIDS are less than one in a million. Packed red blood cells are produced from whole blood or by apheresis. They typically last for three to six weeks. The widespread use of packed red blood cells began in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fresh Frozen Plasma
Fresh frozen plasma (FFP) is a blood product made from the liquid portion of whole blood. It is used to treat conditions in which there are low blood clotting factors (INR > 1.5) or low levels of other blood proteins. It may also be used as the replacement fluid in plasma exchange. Using ABO compatible plasma, while not required, may be recommended. Use as a volume expander is not recommended. It is given by slow injection into a vein. Side effects include nausea and itchiness. Rarely there may be allergic reactions, blood clots, or infections. It is unclear if use during pregnancy or breastfeeding is safe for the baby. Greater care should be taken in people with protein S deficiency, IgA deficiency, or heart failure. Fresh frozen plasma is made up of a complex mixture of water, proteins, carbohydrates, fats, and vitamins. When frozen it lasts about a year. Plasma first came into medical use during the Second World War. It is on the World Health Organization's List o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Coagulation
Coagulation, also known as clotting, is the process by which blood changes from a liquid to a gel, forming a blood clot. It potentially results in hemostasis, the cessation of blood loss from a damaged vessel, followed by repair. The mechanism of coagulation involves activation, adhesion and aggregation of platelets, as well as deposition and maturation of fibrin. Coagulation begins almost instantly after an injury to the endothelium lining a blood vessel. Exposure of blood to the subendothelial space initiates two processes: changes in platelets, and the exposure of subendothelial tissue factor to plasma factor VII, which ultimately leads to cross-linked fibrin formation. Platelets immediately form a plug at the site of injury; this is called ''primary hemostasis. Secondary hemostasis'' occurs simultaneously: additional coagulation (clotting) factors beyond factor VII ( listed below) respond in a cascade to form fibrin strands, which strengthen the platelet plug. Disorder ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coagulation Screen
A coagulation screen is a combination of screening laboratory tests, designed to provide rapid non-specific information, which allows an initial broad categorization of haemostatic problems. __TOC__ Process The basic screen consists of: * platelet count * bleeding time for platelet function * PR (prothrombin ratio) for the tissue factor pathway (extrinsic pathway) * aPTT (Activated Partial Thromboplastin time) for the contact activation pathway (intrinsic pathway) * TCT or fibrinogen assay for final common pathway (THROMBIN TIME) Two other tests are regularly performed at the same time: * blood count, to detect other hematological abnormalities * liver function tests to exclude liver disease as a cause of coagulation factor deficiency These tests may miss mild abnormalities but they will detect major disorders. The results of these screening tests, in conjunction with the clinical history (especially bleeding history), will then direct the selection of further, more detailed a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Platelet Transfusion
Platelet transfusion, also known as platelet concentrate, is used to prevent or treat bleeding in people with either a low platelet count or poor platelet function. Often this occurs in people receiving cancer chemotherapy. Preventive transfusion is often done in those with platelet levels of less than 10 x 109/L. In those who are bleeding transfusion is usually carried out at less than 50 x 109/L. Blood group matching ( ABO, RhD) is typically recommended before platelets are given. Unmatched platelets, however, are often used due to the unavailability of matched platelets. They are given by injection into a vein. Side effects can include allergic reactions such as anaphylaxis, infection, and lung injury. Bacterial infections are relatively more common with platelets as they are stored at warmer temperatures. Platelets can be produced either from whole blood or by apheresis. They keep for up to five to seven days. Platelet transfusions came into medical use in the 1950s and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |