Simpson Atherocath is which type of atherectomy device?

• A. Rotational atherectomy device
• B. Directional coronary atherectomy (DCA)
• C. Orbital atherectomy device
• D. Laser atherectomy device

Answer: (B)

Directional coronary atherectomy uses a forward-cutting mechanism that shaves plaque from the vessel wall and captures the debris in a nosecone for removal. Simpson Atherocath is designed with this directional cutter, allowing targeted debulking of plaque in a specific direction, which is why it fits this category best.

In contrast, rotational atherectomy relies on a high-speed burr to grind away calcified plaque, orbital atherectomy uses an orbiting crown to sand plaque, and laser atherectomy uses laser energy to vaporize tissue. The key distinction here is the method of plaque removal: the Simpson Atherocath cuts directionally and collects debris, rather than grinding, sanding, or vaporizing.