Research protocol
The device designed for the research consists of a needle shaft covered by insulating material (plastic, silicone or polyurethane). It was not necessary to manufacture the device, as a product with these characteristics is already available in the clinical practice of health services. It was only adapted for the purpose proposed in the study.The needled catheter was used for the first time in 1945 aiming at venipuncture for long-term intravenous therapy [A number 14 Jelco® was used for the study, whose caliber of approximately 01 mm allows the passage of the 16G Trucut biopsy needle.All procedures started with liver biopsy and subsequently, sequential surgery was performed. Thus, there was no influence of the previously scheduled surgery.