The present invention relates to a medical needle which comprises a needle (1) having at least one channel (21), at least one optical waveguide (22) and a syringe connector (20). The syringe connector (20) is in communication with the at least one channel (21) and permits further communication with an additional syringe (25), thereby permitting the correspondence of fluid between the syringe (25) and the tip of the needle (1). The optical waveguides (22) are arranged within the needle (1) in order to make optical measurements at the tip of the needle (1). The cross section of the distal end of the elongate tube (1) has a dividing line for each channel (21) which separates that channel (21) from the one or more optical waveguides (22).
