A surgical instrument includes an outer tubular sleeve configured to receive a middle tubular member coaxially therethrough to define an irrigation pathway therebetween and therealong. An inner tubular shaft is rotatably received within the middle tubular member, a distal end of the inner tubular shaft forming a surgical bur configured to cut tissue or bone upon rotation thereof. One or more fluid exit ports is defined at the end of the irrigation passageway between the distal end of the outer tubular sleeve and the distal end of the middle tubular member. The fluid port(s) is configured to direct irrigation fluid in a narrow stream toward the surgical bur. The annular space between each respective fluid exit port at the end of the irrigation passageway is sealed to prevent irrigation fluid from leaking and obscuring the surgeon's view of the surgical bur.

A system and method for harvesting autologous tissue, mincing it into fragments that are visible and measurable when filtered, and delivering a portion of the tissue back into the patient without the need to directly touch the tissue. During the same surgical procedure, the tissue can be mixed with a biocompatible agent before introduction into the repair site.