Three dimensional, low friction vasoocclusive coil, and method of manufacture

A method of making a vasoocclusive device that is adapted to be inserted into a portion of a vasculature for occluding the portion of the vasculature for use in interventional therapy and vascular surgery, said vasoocclusive device being formed from at least one strand of a flexible material formed to have a first inoperable, substantially linear configuration for insertion into and through a catheter to a desired portion of the vasculature to be treated, and having a second operable, three dimensional configuration for occluding the desired portion of the vasculature to be treated, the method comprising the steps of:

• winding at least one strand of a flexible material about an orthogonally shaped mandrel in a three dimensional configuration of the vasoocclusive device,
• said orthogonally shaped mandrel including a handle, and helically winding a portion of said at least one strand of flexible material about the handle;
• heating said at least one strand of a flexible material for a sufficient period of time to impart the form to the material included in the device to form a first operable, three dimensional portion of the vasoocclusive device and a second operable, substantially J-shape portion of the vasoocclusive device extending outwardly from the three dimensional portion and configured filling and reinforcing the distal, three dimensional portion when the vasoocclusive device is implanted at the portion of the vasculature to be treated;
• removing the vasoocclusive device from the mandrel;
• and
• cold working the vasoocclusive device into a desired elongated configuration for placement into a catheter or cannula for use.

A method of making a vasoocclusive device that is adapted to be inserted into a portion of a vasculature for occluding the portion of the vasculature for use in interventional therapy and vascular surgery, said vasoocclusive device being formed from at least one strand of a flexible material formed to have a first inoperable, substantially linear configuration for insertion into and through a catheter to a desired portion of the vasculature to be treated, and a portion having a second operable, three dimensional configuration for occluding the desired portion of the vasculature to be treated, the method comprising the steps of:

• winding at least one strand of a flexible material about an orthogonally shaped mandrel in a three dimensional configuration of the vasoocclusive device,
• said orthogonally shaped mandrel including a handle, and helically portion of said at least one strand of flexible material about the handle;
• heating said at least one strand of a flexible material for a sufficient period of time to impart the form to the material included in the device to form a first operable, three dimensional portion of the vasoocclusive device and a second operable, substantially J-shape portion extending outwardly from the three dimensional portion and configured for filling and reinforcing the three dimensional portion when the vasoocclusive device is implanted at the portion of the vasculature to be treated;
• removing the vasoocclusive coil from the mandrel;
• and
• cold working the vasoocclusive coil into a desired elongated configuration for placement into a catheter or cannula for use.