A surgical system for treating body tissue, the system comprising: a surgical cutting instrument (22) that includes: an internal element (56) that includes a distal cutting tip (102), a proximal end, a proximal vacuum window (103) located between the distal cutting tip and the proximal end, and a light (105) extending between the distal cutting tip and the proximal end, in which the light is in fluid communication with the distal cutting tip , the proximal vacuum window and the proximal end； an external element (52) having a distal region (66) that forms a cutting window； a coupler (33) that holds the internal and external elements such that the internal element is rotatably received in the external element, the cutting tip being exposed in the cutting window, in which the cutting tip and the distal region they are combined to define a cutting tool characterized in that the coupler comprises an external envelope (64) and an internal envelope (62) coaxially arranged in the external envelope, the internal envelope including an opening (136)； and a suction control mechanism (34) integrated into an interior of the coupler and defining a suction control path (65) between a first hole (35) in the outer shell exposed on an outside of the coupler and a second orifice defined by the proximal vacuum window, connectable the second orifice to a negative pressure source (24) by means of the proximal end and the light of the internal element, and in which a part of the suction control path includes the first hole and opening, in which the aspiration control mechanism provides user control over a vacuum level applied at the distal cutting tip by means of the selective positioning of a finger on the first hole.Un sistema quirúrgico para tratar un tejido corporal, comprendiendo el sistema: un instrumento de corte quirúrgico (22) que incluye: un elemento interno (56) que incluye una punta de corte distal (102), un extremo proximal, una ventana de vacío proximal (103) situada entre la
