| 摘要 |
A catheter device for providing visualization as well as support and/or stability for blood vessels during procedures for inserting electrical leads. The catheter device comprises a longitudinal member having a distal end and a proximal end, an expandable element near the distal end of the longitudinal member for providing support to the blood vessel, and a contrast release port near the distal end of the longitudinal member for releasing a contrast medium into the blood vessel to visualize the blood vessel. The expandable element may comprise an inflatable balloon, or a plurality of compressible elements that expand to a balloon like shape, or a compressible coil housed in a protective sheath that retracts to allow the coil to expand. The catheter device comprises two inflatable balloons. At its proximal end, the catheter device comprises one or more inflation ports for inflating the one or more balloons. To allow for visualization using a contrast agent, the catheter device further comprises a contrast injection port near its proximal end, and a contrast release port near its distal end.
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