Читать книгу Gastrointestinal Pathology - Группа авторов - Страница 15

The most common application of FNA devices in endoscopy is endoscopic ultrasound‐guided tissue sampling (EUS‐FNA). The development of endoscopic ultrasound in the 1970s and 1980s significantly expanded the reach of endoscopic tissue sampling into the pancreas and other extraluminal organs such as lymph nodes and now virtually any organ within reach of the proximal or distal GI tract lumen (Figure 1.9).

Other needle aspiration devices include biliary sampling needles often used in conjunction with forceps and brush sampling, or so‐called “triple sampling.” EUS‐FNA devices come in various sizes from 19‐ to 25‐gauge. These devices are typically attached to a handle, which allows the endoscopist to puncture and make to‐and‐fro movements within the target lesion and also apply negative pressure. With various methods, both cytologic and histologic material can be obtained through these needle devices. Recent efforts to develop Tru‐Cut devices have been met with variable success.