Minnesota-based r4 Vascular lands FDA approval for its PTA balloon catheter in 28 sizes.
 Angioplasty balloon maker r4 Technologies wins FDA approval 
Maple Grove, Minn.-based r4 Technologies landed FDA approval for its Vector percutaneous transluminal angioplasty balloon catheters, which come in 28 different sizes.
The devices help keep access sites open for dialysis treatments, which restore blood flow in the legs, or to dilate narrowings in the renal arteries or in other vessels throughout the body.
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