A cannula, comprising: a body having a length, a proximal end , and a distal end , the distal end opposite the proximal end across the length of the body , the body tapering from the proximal end toward the distal end and sized and shaped such that it can be inserted into an auditory canal, the body positionable within one human ear such that the body impacts a side wall of an auditory canal of the ear before the distal end impacts an ear drum of the ear; wherein the body includes: an irrigation inlet port positioned at the proximal end ; a discharge collection outlet port positioned at the proximal end ; a plurality of irrigation outlet apertures positioned relatively toward the distal end with respect to the irrigation inlet port ; a discharge collection inlet port positioned at the distal end ;at least one irrigation passage that provides at least one irrigation flow path between the irrigation inlet port and the plurality of irrigation outlet apertures ; and at least one discharge collection passage that provides at least one discharge flow path that extends between the discharge collection inlet port and the discharge collection outlet port ; and characterized in that the distal end of the body includes a bevelled portion that overhangs the discharge collection inlet port and that includes the plurality of irrigation outlet apertures . a body having a length, a proximal end , and a distal end , the distal end opposite the proximal end across the length of the body , the body tapering from the proximal end toward the distal end and sized and shaped such that it can be inserted into an auditory canal, the body positionable within one human ear such that the body impacts a side wall of an auditory canal of the ear before the distal end impacts an ear drum of the ear; wherein the body includes: an irrigation inlet port positioned at the proximal end ; a discharge collection outlet port positioned at the proximal end ; a plurality of irrigation outlet apertures positioned relatively toward the distal end with respect to the irrigation inlet port ; a discharge collection inlet port positioned at the distal end ;at least one irrigation passage that provides at least one irrigation flow path between the irrigation inlet port and the plurality of irrigation outlet apertures ; and at least one discharge collection passage that provides at least one discharge flow path that extends between the discharge collection inlet port and the discharge collection outlet port ; and characterized in that the distal end of the body includes a bevelled portion that overhangs the discharge collection inlet port and that includes the plurality of irrigation outlet apertures . an irrigation inlet port positioned at the proximal end ; a discharge collection outlet port positioned at the proximal end ; a plurality of irrigation outlet apertures positioned relatively toward the distal end with respect to the irrigation inlet port ; a discharge collection inlet port positioned at the distal end ;at least one irrigation passage that provides at least one irrigation flow path between the irrigation inlet port and the plurality of irrigation outlet apertures ; and at least one discharge collection passage that provides at least one discharge flow path that extends between the discharge collection inlet port and the discharge collection outlet port ; and characterized in that the distal end of the body includes a bevelled portion that overhangs the discharge collection inlet port and that includes the plurality of irrigation outlet apertures . <EOS>