Which item connects the inflation system to the catheter lumen to transfer fluids during PCI?

• A. Extension tubing
• B. Manifold
• C. Torque device
• D. Hemostatic valve

Answer: (A)

In PCI, the inflation system must have a direct, sterile conduit to deliver fluids into the catheter lumen, and that role is fulfilled by extension tubing. This flexible tubing links the inflation device (syringe or pump) to the catheter hub, allowing saline, contrast, or medications to be transmitted under pressure to inflate the balloon and to flush the line as needed. It keeps the system closed and minimizes air entry, while enabling controlled inflation.

The other items aren’t the direct fluid conduit: a manifold provides multiple ports for different connections but not the single fluid pathway to the lumen; a torque device is used to rotate and steer the catheter; and a hemostatic valve seals the access point to prevent blood loss, but does not serve as the main channel for transferring fluids into the catheter lumen.