University revision · Laboratory Management

Commodity Pipeline and Distribution Flow

Question 1 of 19 Course: Biomedical Science(Degree)

What does the 'pipeline' in supply chain management refer to?

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The Donath-Landsteiner test is a specific diagnostic test for Paroxysmal Cold Hemoglobinuria (PCH), a rare type of autoimmune hemolytic anemia. PCH is caused by a biphasic IgG antibody, usually directed against the P blood group antigen. This antibody has a unique property: it binds to red cells at cold temperatures (in the peripheral circulation) and fixes complement. When the blood returns to warmer core body temperatures, the bound complement cascade is activated, causing intravascular hemolysis. The Donath-Landsteiner test mimics this in the lab by incubating the patient's blood first in ice water and then at 37°C. Hemolysis after the warm phase indicates the presence of this biphasic hemolysin, confirming PCH.

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