MRI Coaxial Puncture Needles by Somatex Medical Technologies fulfill a number of purposes. These multi-purpose cannulae can be used for both initial puncture and as coaxial cannulae for guiding biopsy instruments. This instrument can also be used as a guide needle for catheters and guide wires, as well as serving as an injection and drainage cannula. The combination of the needle's special alloy material and is sharp trocar tip provide optimum visibility in MRI images, while at the same time subjecting the patient to minimal puncture trauma.