Cashier's Needle

A cashier's needle is a special instrument used to puncture the bone marrow. It is named after the Soviet physician and hematologist Ilya Abramovich Kassirsky (1898-1971), who first used this diagnostic method in the 1930s.

The cashier's needle is a thin hollow needle 5-10 cm long and 1-2 mm in diameter. It is usually made of stainless steel. The end of the needle has a bevel that allows you to take a sample of bone marrow.

The procedure for bone marrow puncture using a Kassirsky needle is carried out as follows. After numbing the skin, a needle is inserted into the bone marrow (usually the sternum or iliac wing). Then the bone marrow fluid is aspirated along the needle using a syringe. The resulting sample is sent for cytological and histological examination.

Bone marrow puncture with a Kassirsky needle is widely used to diagnose various hematological diseases, in particular leukemia and anemia. This method allows you to obtain a sample of bone marrow to study cellular composition and morphology. The Kassirsky needle still remains an important diagnostic tool in hematology.