The peripheral blood smear Flashcards
Anisocytosis
increased variation in cell SIZE
Poikilocytosis
increased variation in cell SHAPE
Hypochomia
area of the central pallor that is larger than 1/3 of the diameter of the red cell.
Microcyte
diameter less than that of the nucleus of a normal small lymphocyte
Macrocyte
diameter less than that of the nucleus of a normal small lymphocyte
spherocytosis
A spherocyte is a red cell that lacks central
pallor because of its spherical shape. In hereditary spherocytosis, there are usually cells in
which the central pallor is reduced rather than absent
Red cell fragmentation
schistocytes
microspherocytes
spheroschistocytes
Schistocytes are seen in
microangiopathic hemolytic anemias and in mechanical hemolysis
Target cells
A target cell is an erythrocyte with a hemoglobinized area in
the middle of the normal area of central pallor
Pappenheimer bodies
A Pappenheimer body is an ironcontaining red cell inclusion (arrow)
Pappenheimer bodies are seen in
splenectomy and in sideroblastic anemias
Teardrop poikilocytes,or dacrocytes, are teardrop-shaped red cells; they are characteristic of
primary myelofibrosis but are also seen in megaloblastic anemia
Rouleau formation
stacks of red cells, often compared to stacks of coins.
They result from an increase of high-molecular-weight globulins in the plasma, either as a reactive change or as a result of secretion of a paraprotein in a plasma cell neoplasm
Khi nào cần phết máu ngoại vi? (blood smear)
- Hạch to, lách to
- Dấu hiệu thiếu máu trên lâm sàng
- Hay bầm/chảy máu bao gồm xuất huyết võng mạc không rõ nguyên nhân
- Suy thận cấp
- Vàng da, THA / phụ nữ mang thai
- Đau xương
- Đau ngực, đau bụng hoặc lác to cấp không rõ nguyên nhân ở trẻ em
- Tăng bilirubin máu không rõ nguyên nhân
