METHOD OF CORE-BIOPSY OF TUMOR CHANGES IN THE BOTTOM OF THE ORAL CAVITY AND TONGUE UNDER ULTRASOUND CONTROL Russian patent published in 2023 - IPC A61B10/02 A61B8/08 

FIELD: medicine; oncology.

SUBSTANCE: ultrasound guidance is used to guide the biopsy needle to the area of interest and control its entry into it using the free-hand method or using an adapter for the biopsy needle. A core biopsy is performed using a Bard Magnum biopsy gun with needles with a diameter of 16G or 18G, depending on the location of the formation. In case of spread of tumor changes to the anterior, middle parts of the tongue and the area of the border of the middle third and root of the tongue or localization of tumor changes in the superficial layers of the floor of the mouth, a transoral trephine biopsy is performed using a microconvex intracavitary sensor operating in the range of 3–10 MHz with an adapter for puncture needle. After anesthesia, a biopsy needle is passed through the adapter into the soft tissue. In case of localization of tumor changes in the anterior parts of the tongue, a transoral trephine biopsy is performed without an adapter using a linear L12-5 sensor operating in the range of 5–12 MHz. An ultrasonic linear sensor is installed on the area of interest. After anesthesia, the tip of the biopsy needle is placed on the soft tissue. In case of localization of tumor changes in the deep layers of the floor of the mouth and tongue, or if tumor changes are inaccessible for puncture during intraoral ultrasound, a transcutaneous trephine biopsy is performed using a linear L12-5 sensor operating in the range of 5–12 MHz without any adapter, or a broadband contextual sensor C5-1, operating in the range of 1-5 MHz without any adapter. An ultrasound sensor is installed in the chin or submandibular areas and the scanning plane and the route of the puncture needle are selected in such a way as to bypass the main vessels and salivary glands. Under transcutaneous ultrasound guidance after anesthesia, a biopsy needle is inserted into the soft tissue. Then, when the tip of the biopsy needle begins to be visualized on the echogram, it is passed through the soft tissue until tumor changes are visualized. After this, a “shot” is fired at a distance of 15 mm or 22 mm. After trephine biopsy, the biopsy needle with the material is removed, and the resulting material is placed in a container with formaldehyde. The puncture site is compressed with a gauze pad.

EFFECT: increasing the efficiency and safety of collecting material to confirm or refute the presence of tumor pathology, avoid damage to anatomically important structures, and select an adequate scope of treatment.

3 cl, 4 dwg, 4 ex