METHOD OF FINE-NEEDLE ASPIRATION BIOPSY OF PARASTERNAL LYMPH NODES IN PATIENTS WITH BREAST CANCER Russian patent published in 2019 - IPC A61B8/08 

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely to oncology, and can be used for fine-needle aspiration biopsy of parasternal lymph nodes in breast cancer patients. US-navigation is followed by layer-by-layer infiltration anesthesia of skin, subcutaneous fat, thoracic and intercostal muscles observing the principle "end of the needle follows a novocaine stream". Anesthesia is followed by a fine-needle aspiration biopsy procedure under ultrasound guidance. For this purpose, a linear sensor is inserted in the intercostal space so that the detected altered lymph node is placed on the center of the screen. Using the color Doppler coding mode, internal thoracic vessels are visualized and the optimal plane of the needle passing around the detected vessels is selected. Puncture needle is placed directly in the center of the lateral surface of the ultrasonic sensor at angle of 30–45 degrees to the skin surface. Skin and subcutaneous fat pass slowly through the layer-by-layer way; at that, the needle tip should appear on the image screen. Further, by controlling the needle tip direction and correcting the penetration angle, the needle is directed to the detected lymph node. Having reached the edge of the lymph node, the needle is brought into the center of the lymph node, the syringe is pumped with negative pressure in the syringe and hand movements with amplitude of 2–4 mm; a morphological material is drawn into the needle lumen and the syringe cannula, after which a syringe is removed.

EFFECT: method provides effective and safe production of morphological material in patients with breast cancer ensured by biopsy control.

1 cl, 4 dwg, 2 ex