| 摘要 |
A method for inserting a lead into coronary veins of a patient. The method comprises providing a guide sheath that comprises a tube having a proximal portion and a distal portion; a lumen passing through said tube, said lumen is provided with a first opening in said proximal portion and a second opening in said distal portion, said lumen is adapted to allow the lead to pass through it; a balloon provided in said distal portion, said balloon is adapted to be inflated outwardly and circumferentially from said tube; a tubing fluidically connected to said balloon, said tubing extends from said balloon to said proximal portion. The method further comprises inserting the guide sheath into a coronary vein; inflating said balloon so as to prevent retrograde blood flow from the coronary vein; inserting the lead into the coronary vein through said lumen and placing it in a target location. When the balloon is inflated, retrograde blood flow from the coronary veins is prevented, the pressure in the coronary veins is increased and the coronary veins are enlarged allowing the lead to freely advance through them.
|
