Tissue prosthesis processing technology
View Patent ↗A heart valve prostheses crimping apparatus and method for deducing the diameter of stents containing heart valve prosthesis. A medical prosthesis catheter loading apparatus, including a crimping assembly for reducing the diameter of a prosthesis; and a catheter clamp for holding a catheter adjacent to the prosthesis. Also disclosed is an apparatus for reducing the diameter of a medical prosthesis, including a base, a crimp head connectable to the base, and an actuation mechanism connected to the base and connectable to the crimp head to actuate the crimp head. Also disclosed is a method of loading a medical prosthesis into a catheter, including the steps of reducing the diameter of a prosthesis from its normal deployed state to a diameter less than that of the lumen of the catheter; holding a catheter adjacent to the reduced diameter prosthesis; and moving the prosthesis into the catheter lumen.
1. A medical prosthesis catheter loading apparatus, comprising:
a. a crimping assembly for reducing the diameter of a prosthesis, the crimping assembly comprises a base, a crimp head connectable to the base, and an actuation mechanism connected to the base and connectable to the crimp head to actuate the crimp head, wherein the base comprises a pair of crimp head retaining members, the retaining members being constructed of a sterilizable material, crimp elements, and having a crimp head element guide with at least two concentric arrangements of linear grooves; and
b. a catheter clamp for holding a catheter adjacent to the prosthesis.
2. The apparatus of claim 1 , wherein the crimp head comprises a plurality of crimp elements arranged about a central crimp aperture.
3. The apparatus of claim 2 , wherein the elements linearly move to vary the size of the central crimp aperture.
4. The apparatus of claim 2 , wherein each crimp element has a distal end disposed near the central aperture and a proximal end disposed away from the central aperture, each element further having a distal rectilinear slide block, a proximal rectilinear slide block, and at least one flat actuation surface.
5. The apparatus of claim 2 , wherein the head is readily disposable.
6. The apparatus of claim 5 , further comprising an element loader for configuring the crimp elements.
7. The apparatus of claim 2 , wherein the actuation mechanism comprises a rotatable activation ring communicatively connected to the crimp elements to move them linearly toward the central crimp aperture.
8. The apparatus of claim 7 , wherein the activation ring is communicatively connected to the crimp elements via element contacting rollers.
9. The apparatus of claim 7 , wherein the activation ring is communicatively connected to the crimp elements via element contacting pins.
10. The apparatus of claim 7 , wherein the actuation mechanism further comprises a screw connected to the activation ring via a lever arrangement.
11. The apparatus of claim 7 , wherein the actuation mechanism further comprises an arm connected to the activation ring via a gear arrangement.
12. The apparatus of claim 1 , wherein the catheter clamp comprises a pair of blocks, each having slot for engaging a portion of a catheter, and a clamp for holding the blocks together, the blocks and clamp being constructed of a sterilizable material.
13. The apparatus of claim 12 , wherein at least one block has a face for connecting to the crimping assembly.
14. The apparatus of claim 1 , further comprising a submersion tank for holding a predetermined amount of a medical solution and adapted for enclosing at least a portion of the crimping assembly and the catheter clamp.