Delivery catheter with implant ejection mechanism

1. A device for fallopian tube occlusion detection, comprising:

a handle;

a catheter body longitudinally fixed relative to the handle, said catheter body having a distal end and a proximal end;

a rod longitudinally fixed relative to the handle;

a sheath slidably disposed about the rod, including a distal portion that is slidably extendable distally from the distal end of the catheter; and

a sheath retraction mechanism disposed within the handle, said sheath retraction mechanism comprising

a chassis fixedly coupled to the handle;

a sliding hub slidably engaged with the chassis and fixed to the sheath;

a fluid filled chamber;

a piston disposed within the chamber;

a piston rod coupled to the piston and the sliding hub; and

a spring operably engaged with the piston;

wherein the sheath retraction mechanism retracts the sheath when the spring is released, and said retraction is dampened by the fluid filled chamber.

2. The device of claim 1 further comprising:

a latch configured to allow release of the spring and translation of the sheath;

a pushbutton operable to impinge on the latch.

3. The device of claim 2 further comprising:

a solenoid disposed proximate the latch, said solenoid being operable to impinge on the latch.

4. The device of claim 1 , wherein:

the proximal end of the catheter body is fixed to the handle;

a proximal end of the sheath is fixed to the sliding hub; and

the rod is longitudinally fixed to the handle at a point proximal of the proximal end of the sheath.

5. The device of claim 4 , wherein:

a proximal end of the rod extends proximally from the proximal end of the sheath, and is longitudinally fixed to the chassis at a point proximal of the proximal end of the sheath.

6. The device of claim 1 further wherein:

the spring is disposed within the fluid-filled chamber, and is operably engaged with the piston.