Safety of FNA needles in puncturing vessels (in animal model)
In pigs, Thoracic and abdominal aorta , celiac axis, superior mesenteric and splenic artery, splenic, portal, and hepatic veins were injected with contrast by using FNA needles under fluoroscopy under EUS guidance. Immediate Necropsy The 25-gauge FNA needle did not cause any visible vascular injury or bleeding. The 22-gauge needle left a visible puncture mark without active bleeding. In 1 of 5 pigs, the 19-gauge needle caused a localized vascular hematoma around Thoracic and Abdomial aorta and 150 mL of intra-abdominal blood. Mind - it was an FNA needle (not FNB) Source: :10.1016/j.gie.2007.01.011