Dynamis Slider

The majority of hemodialysis access-related blockages are located in the arteriovenous system, where the anatomy is tortuous and complex. We’re proud to announce that Merit now offers the Dynamis AV™, a high-pressure, 0.035” over-the-wire percutaneous transluminal angioplasty (PTA) dilatation catheter. Indicated for use in PTA of the femoral, iliac, and renal arteries, and for the treatment of obstructive lesions of native or synthetic arteriovenous dialysis fistulae, the Dynamis AV is designed to overcome these challenges.

PTA is a common treatment used to correct failing or thrombosed dialysis fistulae. Catheter dilation pressure has been shown to be linked to treatment outcomes.1 Data from a study by Trerotola et al. suggests that high pressures (>15atm) are often needed for PTA in dialysis access, and very high pressures (>20atm) are more commonly needed in native fistulas.1

The Dynamis AV provides a high rated burst pressure (RBP) of up to 27atm. To complement this feature, it’s designed with a robust, semi-compliant nylon balloon to promote vessel conformity and resist straightening, thereby dilating most lesions successfully.

Other Dynamis AV key features:

  • A coaxial catheter shaft, comprising an outer inflation lumen paired with an inner guide wire lumen, offers strength and flexibility while supporting rapid inflation, deflation, trackability, and pushability.
  • Multiple balloon diameters (3mm-16mm) and balloon lengths (20mm-100mm) are available, each designed with radiopaque marker bands to facilitate precise balloon positioning during procedures.
  • A pre-installed re-wrap tool eases reinsertion through the sheath.

The addition of the Dynamis AV is just one more way Merit strives to expand its dialysis portfolio, provide ongoing support for interventional procedures, and show commitment to dialysis access. Please visit Merit.com/DialysisAV for product information, including instructions for use.


  1. Trerotola, S. O. Kwak, A., Clark, T. W., et al. (2005). Prospective study of balloon inflation pressures and other technical aspects of hemodialysis access angioplasty. J Vasc Interv Radiol, Dec;16(12):1613-1618.