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1. A catheter comprising: an elongated catheter body defining a lumen and defining a central longitudinal axis, the elongated catheter body having an outer surface extending both longitudinally along the central longitudinal axis and circumferentially about the central longitudinal axis; a plurality of balloons, wherein the plurality of balloons are longitudinally and circumferentially staggered along the outer surface of the elongated catheter body in a helical arrangement, the plurality of balloons including a first balloon, a second balloon, a third balloon, a fourth balloon, and a fifth balloon, the first, second, third, fourth, and fifth balloons having different circumferential positions along the outer surface of the elongated catheter body, wherein the second balloon is directly adjacent to the first and third balloons in at least a circumferential direction, the circumferential direction being orthogonal to the central longitudinal axis and extending about the central longitudinal axis with the central longitudinal axis being an axis of rotation of the circumferential direction, wherein when the first, second, third, fourth, and fifth balloons are fully expanded, there is: a first circumferential gap between the first and second balloons; a second circumferential gap between the second and third balloons; a third circumferential gap between the third and fourth balloons; and a fourth circumferential gap between the fourth and fifth balloons, such that an entirety of the first, second, third, fourth, and fifth balloons do not overlap in the circumferential direction, the first and second circumferential gaps extending less than fully around an outer perimeter of the elongated catheter body, wherein the first balloon, the second balloon, the third balloon, the fourth balloon, and the fifth balloon in the helical arrangement define a plurality of fluid passageways, wherein the fluid passageways of the plurality of fluid passageways are circumferentially offset from each other, wherein the each of the fluid passageways of the plurality of fluid passageways allows a fluid to flow outside of the lumen of the elongated catheter body and along the outer surface of the elongated catheter body in a longitudinal direction; and a therapeutic neurovascular device within the lumen of the elongated catheter body, wherein the therapeutic neurovascular device is configured to treat a defect in the vasculature of the patient while the plurality of balloons is expanded in the vasculature such that the plurality of balloons is in apposition with a vessel wall and fluid is flowing outside of the lumen of the elongated catheter body past and along an outer surface of a balloon of the plurality of balloons, and wherein the therapeutic neurovascular device comprises an embolic retrieval device, a thrombectomy device, a stent, a stent retriever, an embolic coil, a microvascular plug, a filter, a flow diverter, an aspiration catheter, a balloon catheter, or a drug delivery catheter.
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