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Gestational (incidental) thrombocytopenia is a condition that commonly affects pregnant women.Thrombocytopenia is defined as the drop in platelet count from the normal range of 150,000–400,000/μL to a count lower than 150,000/μL. [1]
Low levels of platelets in turn may lead to prolonged or excessive bleeding. It is the most common coagulation disorder among intensive care patients and is seen in a fifth of medical patients and a third of surgical patients. [3] A normal human platelet count ranges from 150,000 to 450,000 platelets/microliter (μL) of blood. [4]
Thrombotic thrombocytopenic purpura (TTP) is a blood disorder that results in blood clots forming in small blood vessels throughout the body. [2] This results in a low platelet count, low red blood cells due to their breakdown, and often kidney, heart, and brain dysfunction. [1]
As in non-pregnant individuals, ITP in pregnancy is a diagnosis of exclusion and other potential causes of low platelets in pregnancy require consideration. These include obstetrical causes such as pre-eclampsia, HELLP syndrome (hemolysis, elevated liver enzymes and low platelets), or thrombotic microangiopathies that may occur during pregnancy ...
The diagnosis of NAIT is usually made after an incidental finding of a low platelet count on a blood test or because of bleeding complications ranging from bruising or petechiae to intracranial hemorrhage in the fetus or newborn. [6] Frequently, the reduction in platelet count is mild and the affected neonates remain largely asymptomatic. [6]
Red blood cell breakdown, low blood platelet count, impaired liver function, kidney problems, swelling, shortness of breath due to fluid in the lungs, eclampsia [2] [3] Usual onset: After 20 weeks of pregnancy [2] Risk factors: Obesity, prior hypertension, older age, diabetes mellitus [2] [4] Diagnostic method
In a typical set of rules, a platelet donor must weigh at least 50 kg (110 lb) and have a platelet count of at least 150 x 10 9 /L (150,000 platelets per mm³). [2] One unit has greater than 3×10 11 platelets. Therefore, it takes 2 liters of blood having a platelet count of 150,000/mm³ to produce one unit of platelets.
The effect of pregnancy on platelet count is unclear, with some studies demonstrating a mild decline in platelet count and other studies that show no effect. [24] The white blood cell count increases with occasional appearance of myelocytes or metamyelocytes in the blood. [24] During labor, there is a rise in leukocyte count.
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