Bleeding terminology for Medical Lab.students

1. Bleeding Terminology
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2. Petechiae
Tiny red spots resulting from blood
extravasated from normally healthy
blood vessels which have become
abnormally permeable (due to a
vascular or platelet disorder).
Petechiae usually occur in clusters
over various parts of the body.
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3. Purpura
Purpura
These are considered to be
confluent petechiae. The same
conditions for their appearance
apply.
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4. Ecchymosis
An area of extravasated blood arising from trauma to the blood
vessels of that area. This can also arise in patients with vascular or
platelet disorders.
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5. Epistaxis
"Nose bleeding" This is usually caused by a mild trauma to the blood
vessels of the anterior nares, but occasionally is a manifestation of a
platelet or vascular abnormality.
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6. Telangiectasis, Angioma
Spots or patches produced by blood in abnormally dilated
vessels. These patches will blanch when pressure is applied.
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7. Haematoma
A large bruise throughout the
subcutaneous tissue or muscle
(caused by extravasation into
the perivascular tissue)
resulting in changes in the
colour and shape of the
affected area.
A haematoma may also be
caused by a defect in the
coagulation mechanism such as
occurs in haemophilia,
leukaemia or pathological
fibrinolysis. A haematoma will
not blanch when pressure is
applied.
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8. Haemarthrosis
This is bleeding into
a joint and is usually
seen as the result of
a severe coagulation
disorder eg
haemophilia.
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9. Dr.Abdulrazzaq Othman Alagbare 9
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