A hollow slender tubular instrument designed for percutaneous insertion to provide access for instruments (e.g., biopsy needle) under radiological image guidance [e.g., ultrasound] during procedures relating to tissue lesions (e.g., biopsy, ablation). The cannula includes a sharp trocar blade/mandrel to assist introduction and is intended for soft tissue access, however it might additionally be intended for non-impactive bone access. It is not a dedicated bone access cannula and is not an endoscopic (laparoscopic, arthroscopic) access cannula. Some types include a guide to help percutaneous insertion (e.g., during transperineal prostate biopsy). This is a single-use device.