Coronary sinus lead delivery catheter
AssigneeCardiac Pacemakers, Inc.
InventorEric Johnson
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Abstract
A guide catheter for accessing the coronary sinus ostium has a proximal portion and a distal portion formed into a preformed shape including a curved segment. The preformed shape includes a first arc, a second arc, a third arc, a fourth arc, and a generally straight terminal portion. The preformed shape is generally a J-shape, having a terminal portion generally parallel to the proximal portion, a generally closed arc or a generally open arc.
Claims20
A method of cannulating a coronary sinus of a heart, the method comprising:
- providing a guide catheter having a proximal portion and a distal portion, the distal portion having a preformed shape including a first arc adjacent the proximal portion having a first arc radius of from about 3.0 to about 4.0 inches, a second arc distally adjacent the first arc having a second arc radius of from about 1.2 inches to about 1.8 inches, a third arc distally adjacent the second arc having a third arc radius of from about 2.2 inches to about 3.7 inches, a fourth arc distally adjacent the third arc having a fourth arc radius of from about 1.0 inch to about 1.5 inches and a generally straight terminal portion extending distally adjacent the fourth arc and having a length of from about 0.3 to about 1.9 inches;
- inserting the distal portion into the superior vena cava;
- advancing the distal portion into the right atrium using the superior vena cava to support the distal portion until the terminal portion crosses the tricuspid valve;
- torquing the distal portion 90 degrees counterclockwise to maneuver the terminal portion into the same plane as the coronary sinus ostium;
- withdrawing the distal portion back into the right atrium while maintaining the torque;
- and
- advancing the terminal portion into the coronary sinus ostium while maintaining the torque.
A method of cannulating a coronary sinus of a heart, the method comprising:
- advancing a guide catheter having a proximal portion and a distal portion having a preformed shape configured to use the superior vena cava for support into the right atrium and manipulating the proximal portion to cause a terminal portion to enter the coronary sinus ostium.
A method of cannulating a coronary sinus of a heart, the method comprising:
- providing a guide catheter having a proximal portion and a distal portion, the distal portion having a preformed shape including a first arc adjacent the proximal portion having a first arc radius of from about 3.0 to about 4.0 inches, a second arc distally adjacent the first arc having a second arc radius of from about 1.2 inches to about 37 inches, a third arc distally adjacent the second arc having a third arc radius of from about 1.0 inches to about 1.5 inches, and a generally straight terminal portion extending distally adjacent the third arc and having a length of from about 0.3 to about 1.9 inches;
- inserting the distal portion into the superior vena cava;
- advancing the distal portion into the right atrium using the superior vena cava to support the distal portion until the terminal portion crosses the tricuspid valve;
- torquing the distal portion 90 degrees counterclockwise to maneuver the terminal portion into the same plane as the coronary sinus ostium;
- withdrawing the distal portion back into the right atrium while maintaining the torque;
- and
- advancing the terminal portion into the coronary sinus ostium while maintaining the torque.
Dependencies are inferred from the claim text.