Guide for medical instrument, assembly comprising a guide and of such an instrument, and installation comprising such an assembly

An assembly comprising a guide and a medical instrument, the guide comprising:

• a base intended to be carried by an apparatus comprising a medical imaging probe associated to the medical instrument, and
• a support extending the base and in which is formed at least one column comprising at least one orifice, the column extending according to a first axis, the medical instrument being able to extend through at least the orifice between a proximal face and a distal face of the support,
• the assembly being characterised in that the orifice is shaped as a slot and/or extends over only a portion of the support between the distal face and the proximal face of the guide such that the guide allows a displacement of at least a portion of the medical instrument relative to the distal face of the support according to at least one axis of displacement that is inclined or orthogonal to the first axis.