Detachable microcoil delivery catheter

• US 5,725,546 A
• Filed: 06/24/1994
• Issued: 03/10/1998
• Est. Priority Date: 06/24/1994
• Status: Expired due to Term

• Current Assignee: Target Therapeutics, Inc. (Boston Scientific Corporation)
• Original Assignee: Target Therapeutics, Inc. (Boston Scientific Corporation)
• Inventors: Samson, Gene
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): Shai, Daphna
• Application Number:
  US08/265,580
• Time in Patent Office: 1,355 Days
• Field of Search: 606/151, 606/213, 606/108, 606/191
• US Class Current: 606/191
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/1214 Coils or wires
• CPC Class Codes: A61B 2017/12095 Threaded connection
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2230/0091 helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
• CPC Class Codes: A61M 25/09 Guide wires

Abstract

This invention is a surgical instrument, and specifically is a device for delivering embolic coils to a selected site within the vasculature of a human body. This instrument uses, and may include, the catheter used to place the embolic coil. In particular, the device is made up of a pusher wire having a distal tip which is configured to engage the proximal end of an embolic coil. The device may also include a cylindrical pusher which coaxially surrounds at least a portion of the pusher wire and cooperates in the disengagement of the coil from the pusher wire and the ejection of the vasoocclusive coil into the selected vascular site. The pusher wire'"'"'s engagement tip may be of any selected and convenient shape, and may be grooved, if so desired, to enhance the engagement joint strength.

Claims

1. A combination pusher-coil for occluding a vessel at a selected vascular site within the vessel comprising:

(a) a helically wound coil having a proximal end and an opening in that coil proximal end for accepting an engaging tip on a pusher wire, and

(b) a pusher wire having a longitudinal axis and a distal engaging tip,

said distal engaging tip having an outer surface with grooves formed therein said outer surface is unitary with the distal engaging tip, said distal engaging tip for entering the opening in the proximal end of the helically wound coil.

2. The combination of claim 1 where the coil and the pusher wire are engaged.

3. The combination of claim 2 further comprising a catheter body coaxial to at least a portion of the pusher wire.

4. The combination of claim 1 additionally comprising a pusher tube coaxial to the pusher wire and proximal to the distal pusher wire engaging tip for pushing upon the proximal end of the helically wound coil.

6. The combination of claim 1 further comprising a catheter body coaxial to at least a portion of the pusher wire.

5. The combination of claim 9 further comprising a catheter body coaxial to at least a portion of the pusher wire.