A medical device (10) for treating stress urinary incontinence is provided. The device includes a cannula (20) with a plurality of apertures (34a, 34b, 34c). A plurality of needles (41, 42, 43) is disposed within a lumen (26) of the cannula. A handle (50) includes a housing (52) and a shifter mechanism (60) to translate the plurality of needles from a first position in which the needles are disposed within the lumen of the cannula, to a second position in which a distal portion of each needle extends out of the lumen through respective apertures. The handle also includes a slot (55) including a transversal track (55d) defining a potential range of rotational motion of the shifter mechanism with respect to the housing, and a plurality of longitudinal tracks (55a, 55b, 55c) defining a potential range of translational motion of the shifter mechanism with respect to the housing.
