What is the construction type on an ICD lead?

What is the construction type on an ICD lead?

• A. Cofiller
• B. Insulation
• C. Gel
• D. Polyurethane

Answer: (A)

In ICD lead construction, the term describes how the inside of the lead is assembled. A cofiller design means there is a polymer filler packed into the space around the conductor inside the outer insulation. This fills voids, helps give the lead a uniform diameter, and improves mechanical integrity and sealing against fluid ingress. Insulation and polyurethane refer to materials used for the outer shell or coating, not the overall interior construction. Gel is another interior filling used in some designs, but it’s not the construction type. So cofiller is the description that best captures how the lead is built.

In ICD lead construction, the term describes how the inside of the lead is assembled. A cofiller design means there is a polymer filler packed into the space around the conductor inside the outer insulation. This fills voids, helps give the lead a uniform diameter, and improves mechanical integrity and sealing against fluid ingress. Insulation and polyurethane refer to materials used for the outer shell or coating, not the overall interior construction. Gel is another interior filling used in some designs, but it’s not the construction type. So cofiller is the description that best captures how the lead is built.