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Blood clots Part 3 (Teacher: Michael)

Fortunately, in many cases the correct dosage can easily and constant. But some patients have a prothrombin time which varies very greatly and inexplicably. This means the dosage has to altered frequently.

If there is an alarming haemorrhage the dose has to radically changed - and quickly. Possibly, the doctor will have to an injection of a certain vitamin and then start all over again finding the right dose.

There are two things the patient and his relatives must remember: never an appointment for the taking of a blood sample and never other drugs without permission. A remarkable number of drugs affect the prothrombin time very greatly, especially some sedatives and aspirin.

For many sudden crises anticoagulants are extremely valuable - for example, they are used after heart operations. However, the decision to use them for very long periods, for instance, after a patient has had a stroke or a coronary attack, is a difficult one to and experts are not always agreed.

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