Haemorrhagic tendency examination

Rumpel-Leede test
The so-called Rumpel-Leede test is used to determine the resistance of blood capillares. On the palmar side of the forearm, we determine an area of 4 x 4 cm, then we put on the tonometer cuff and apply pressure (about 100 mmHg) for 5 minutes. In 15 minutes we will count the formed petechiae (a maximum of 10 newly formed petechiae).

Duke method
We test platelet function, the ability to form a platelet plug. An injection is made into the earlobe. Bleeding should normally stop within 2-4 minutes. Sometimes a standard forearm cut is also performed (the norm here is 2-9 minutes).

The time is prolonged in thrombocytopenia a thrombocytopathy and von Willebrand disease.

Platelet aggregation
The rate of platelet aggregation after the addition of the activator is determined photometrically.

Mean platelet volume
It is normally in the range of 6–9 fl. Large platelets are found in some thrombocytopathies.

Související články

 * Krev
 * Krevní obraz
 * Hemokoagulace
 * Vyšetření krevní srážlivosti

Zdroje

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