Method and system for balloon counterpulsation during aortic valve replacement
First Claim
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1. A method for regulating aortic regurgitation, said method comprising:
- positioning a catheter comprising a tubular body and a variable occlusion device in the ascending aorta above the sinus of valsalva, the variable occlusion device comprising first and second expandable occlusion elements disposed in parallel about the tubular body;
expanding the first and second occlusion elements to partially occlude the aortic lumen about the tubular body of the catheter during ventricular diastole to inhibit aortic regurgitation while allowing perfusion of the coronary arteries via the sinus of valsalva;
contracting the first occlusion element while the second occlusion element remains expanded to reduce occlusion of the aortic lumen during ventricular systole to lessen inhibition of blood flow from the left ventricle to the aorta;
performing a replacement or repair procedure while alternating expanding and contracting the first occlusion element in synchrony with diastole and systole as the second occlusion element remains expanded.
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Abstract
Methods and systems for regulating aortic regurgitation during aortic valve replacement or repair procedures utilize a temporary aortic valve (TAV) catheter and a controller. The temporary aortic valve catheter has an expandable occlusion device which can partially occlude the aortic lumen during ventricular diastole with a lesser occlusion during ventricular systole. Exemplary balloon structures include multiple, independently inflatable balloons which are inflated in synchrony with the cardiac cycle by the controller. By controlling aortic regurgitation, the repair or replacement protocols can be conducted with less interference from blood flow.
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Citations
16 Claims
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1. A method for regulating aortic regurgitation, said method comprising:
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positioning a catheter comprising a tubular body and a variable occlusion device in the ascending aorta above the sinus of valsalva, the variable occlusion device comprising first and second expandable occlusion elements disposed in parallel about the tubular body; expanding the first and second occlusion elements to partially occlude the aortic lumen about the tubular body of the catheter during ventricular diastole to inhibit aortic regurgitation while allowing perfusion of the coronary arteries via the sinus of valsalva; contracting the first occlusion element while the second occlusion element remains expanded to reduce occlusion of the aortic lumen during ventricular systole to lessen inhibition of blood flow from the left ventricle to the aorta; performing a replacement or repair procedure while alternating expanding and contracting the first occlusion element in synchrony with diastole and systole as the second occlusion element remains expanded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification