ANAEMIA

Anaemia is a decrease in the total amount of haemoglobin in the blood. And the reduced level of haemoglobin per unit of blood volume characterises. However, it does not regard acute blood loss. In most cases, anaemia also features a lower level of erythrocytes.

Level of haemoglobin

However, the content of erythrocytes may remain healthy, with a low level of haemoglobin. It occurs in cases of iron deficiency, thalassemia, and abnormal porphyrin synthesis. As to thalassemia, then it may even be higher than average.

Blood losses

In acute blood loss (massive haemorrhage or severe haemolysis), the levels of haemoglobin and erythrocytes may remain normal for the first few hours. However, some other apparent symptoms of anaemia appear, such as pale skin, conjunctivae, collapsed veins, palpitations, and dyspnoea during physical activity, and a fall in blood pressure (in some severe cases).

Symptoms

Besides, scientists consider anaemia to be one of the symptoms of some systemic diseases. Therefore, anaemia is always secondary. Alongside frequent and easily diagnosed forms of anaemia, rare anaemic syndromes also require sophisticated diagnostic techniques.