Modified headpiece for hydraulic coil deployment system

1. An occlusion device deployment system, comprising:

a deployment catheter having a proximal end portion, a distal end portion, a lumen therethrough, a distal edge, and an interference surface along the distal end portion and spaced proximally from the distal edge;

a hydraulic pressure located within the lumen of the deployment catheter;

an occlusion device having a proximal end portion, said proximal end portion of the occlusion device removably disposed within the lumen of the deployment catheter;

a deformable interference element located on the proximal end portion of the occlusion device, said deformable interference element transitioning from an initial configuration to a deformed configuration upon an increase in the hydraulic pressure within the lumen of the deployment catheter;

said occlusion device including a relief area that accommodates the deformation of the deformable interference element;

wherein the deformable interference element engages the interference surface on the deployment catheter to secure the proximal end portion of the occlusion device in the lumen of the deployment catheter when the deformable interference element is in the initial configuration;

wherein the deformable interference element disengages the interference surface on the deployment catheter when the interference element is in the deformed configuration, allowing the proximal end portion of the occlusion device to be removed from the lumen of the deployment catheter; and

the proximal end portion of the occlusion device comprises an occlusion device headpiece having a concave surface defining the relief area.

2. The deployment system of claim 1 in which the proximal end portion of the occlusion device comprises a headpiece that is open ended at is proximal end, and the relief area is defined by an opening at said proximal end of the headpiece.

3. The deployment system of claim 1 in which the proximal end portion of the occlusion device is cylindrical and the interference element comprises a deformable radial flare extending from the proximal end portion of the occlusion device.

4. The deployment system of claim 1 in which the interference element is comprised of a flexible polymer.

5. The deployment system of claim 1 in which said transition takes place when the hydraulic pressure within the lumen of the deployment catheter is 100 psi or greater.

6. The deployment system of claim 1 in which the occlusion device includes an embolic coil.

7. The deployment system of claim 1 in which the distal end portion of the deployment catheter is comprised of a coupling sleeve and the interference surface is a portion of the coupling sleeve.

8. The deployment system of claim 7 in which the coupling sleeve is made from a material that does not change configuration upon an increase of hydraulic pressure within the lumen of the deployment catheter.

9. The deployment system of claim 8 in which the coupling sleeve is comprised of a metal hypotube secured to the distal end portion of the deployment catheter.

10. An occlusion device deployment system, comprising:

a deployment catheter having a proximal end portion, a distal end portion, a lumen therethrough, a distal edge, and an interference surface along the distal end portion and spaced proximally from the distal edge;

a hydraulic pressure located within the lumen of the deployment catheter;

an occlusion device having a proximal end portion, said proximal end portion of the occlusion device removably disposed within the lumen of the deployment catheter;

a deformable interference element located on the proximal end portion of the occlusion device, said deformable interference element transitioning from an initial configuration to a deformed configuration upon an increase in the hydraulic pressure within the lumen of the deployment catheter;

said occlusion device including a relief area that accommodates the deformation of the deformable interference element;

wherein the deformable interference element engages the interference surface on the deployment catheter to secure the proximal end portion of the occlusion device in the lumen of the deployment catheter when the deformable interference element is in the initial configuration;

wherein the deformable interference element disengages the interference surface on the deployment catheter when the interference element is in the deformed configuration, allowing the proximal end portion of the occlusion device to be removed from the lumen of the deployment catheter;

the proximal end portion of the occlusion device comprises an occlusion device headpiece having a concave surface defining the relief area and wherein the occlusion device headpiece is open ended at a proximal end, and the relief area is defined by an opening at said proximal end of the headpiece.

11. The deployment system of claim 10 in which the proximal end portion of the occlusion device is cylindrical and the interference element comprises a deformable radial flare extending from the proximal end portion of the occlusion device.

12. The deployment system of claim 10 in which the interference element is comprised of a flexible polymer.

13. The deployment system of claim 10 in which said transition takes place when the hydraulic pressure within the lumen of the deployment catheter is 100 psi or greater.

14. The deployment system of claim 10 in which the occlusion device includes an embolic coil.

15. The deployment system of claim 10 in which the distal end portion of the deployment catheter is comprised of a coupling sleeve and the interference surface is a portion of the coupling sleeve.

16. The deployment system of claim 15 in which the coupling sleeve is made from a material that does not change configuration upon an increase of hydraulic pressure within the lumen of the deployment catheter.

17. The deployment system of claim 16 in which the coupling sleeve is comprised of a metal hypotube secured to the distal end portion of the deployment catheter.