Design Specifications
Metric Design Specs1. Tension in the CT: Tear limit of at least 4.9 N (500 g)
2. Tension in the CT: Cinch limit of at least 4.9 N (500 g) 3. Compliance: 5-13 mL/(mmHg) a. To account for the different volumes of blood that flows through the heart 4. Length of artificial chordae tendineae: 30-45 mm 5. Diameter of artificial CT: 1 mm 6. Diameter of catheter: 20 French (6.67 mm) 7. Diameter of femoral artery: 8.2–12.7 mm (21) 8. Diameter of cinching device < Diameter of catheter 9. Selling price: $27,000 Safety Design Specs 1. The device should be safe
a. Biocompatible b. Does not inhibit blood flow c. Does not inhibit heart motion d. Does not inhibit electrical signals i. In the body ii. EKG |
Patient Design Specs 1. Last the remaining life of the patient
2. Must be small and not allow for plaque build up 3. Once the artificial chordae are cut, no sharp edges may be present Clinical Design Specs 1. The lengths of the artificial chordae must be adjustable before cinching
2. Easily operable by a single physician 3. Procedure < 1 hour long 4. Must integrate with a catheter delivery system 5. Able to move within the left ventricle to be able to cinch the CT where needed 6. Catheter and artificial chordae tendineae must be visible under Transesophageal Echocardiography (TEE) |