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1. What is polyurethane coating and why is it used in medical devices? Polyurethane coatings provide flexibility, durability, and biocompatibility, making them ideal for catheters, stents, and implantable scaffolds. They offer excellent abrasion resistance and can be tailored for different durometers to meet specific clinical needs.  2. What are the main application methods for polyurethane coatings? Common techniques include dip coating  and spray coating . Dip coating immer

When it comes to choosing materials for stents and other vascular devices, Dacron (Polyethylene terephthalate or PET) and ePTFE (expanded Polytetrafluoroethylene) each offer unique advantages and are suited to different applications. Here’s a quick comparison:   Dacron (PET) 🔹  Advantages: 1. Excellent mechanical strength 2. Porous structure for tissue ingrowth 3. Ideal for larger vessels (>10mm) 4. Easier to suture   🔹  Disadvantages: 1. Initial inflammation potential 2. T