The invention provides a novel PTCA
balloon catheter. The
catheter comprises a far-end tube, a near-end tube and a
balloon, a near-end tube is arranged at the bottom end of the far-end tube, the
balloon sleeves the outside of the near-end tube, the balloon is provided with three
layers and comprises a
hydrophilic coating, a compatibility layer and an anti-proliferative
drug layer, an inner flow layer and an outer flow layer are arranged on the inner wall of the balloon, the inner flow layer is attached to the outer flow layer, the inner flow layer is formed by staggered limiting slim tubes, and the outer flow layer is formed by a fine
hair structure. The PTCA
balloon catheter adopts the
hydrophilic coating, the compatibility layer and the anti-proliferative
drug layer to improved the intermiscibility of organisms; and during the flow process, a liquid flows into the inner flow layer from the outer flow layer, the fusion of the liquid is improved by a plurality of groups of the limitingslim tubes, so that the
biocompatibility of organisms can be greatly improved; the biological liquid flows to the outer flow layer after being dissolved, and the liquid tends to be stable after beingfused due to the action of a plurality of fine hairs; and in addition, the compatibility of the liquid can be further improved due to the action of the fine hairs.