Extra to-intracorporeal power supply

• US 5,109,843 A
• Filed: 11/30/1990
• Issued: 05/05/1992
• Est. Priority Date: 11/30/1990
• Status: Expired due to Term

• Current Assignee: University of Cincinnati
• Original Assignee: University of Cincinnati
• Inventors: Melvin, David B., Brooks, David M.
• Primary Examiner(s): Kamm, William E.
• Assistant Examiner(s): SCHAETZLE, KENNEDY
• Application Number:
  US07/621,054
• Time in Patent Office: 522 Days
• Field of Search: 128/419 R, 128/419 PS, 128/419 B, 128/897-899, 128/DIG. 25, 128/780, 623/3, 600/13-15
• US Class Current: 607/2
• CPC Class Codes: A61F 2250/0001 Means for transferring electromagnetic energy to implants
• CPC Class Codes: A61N 1/3787 from an external energy source

Abstract

A method of providing extracorporeal to intracorporeal power transfer in a patient employs a cylindrical primary coil inserted into a segment of small intestine which has been separated and closed at one end. The open end is attached to the abdominal wall providing an opening to the exterior of the body. A secondary coil is formed by wrapping a wire around the serosa of the segmented small intestine. This is in effect a transformer which will transfer energy from the primary coil to the secondary coil. The vascularization of the segment provides for rapid and efficient heat dissipation. This device can be used to power heart assist devices and artificial hearts. Since it is located in an internal pouch, proper location of the primary coil is ensured.

Claims

1. A method of implanting an extra to intracorporeal power supply within a body comprising:

attaching a vascularized intestinal segment to the abdominal wall said segment opened at the end attached to the abdominal wall and closed at the opposite end;

forming an internal secondary coil of wire around serosa of said intestinal segment with first and second ends of said wire remaining in said body;

inserting a primary coil through said open end into said intestinal segment whereby an alternating current passing through said primary coil causes an induction current in said secondary coil effective to power electrically operated prosthetic devices attached to said first and second ends.

2. The method claimed in claim 1 wherein said intestinal segment is a segment of small intestine.

3. The method claimed in claim 1 wherein said power supply has a power output of at least about 20 watts.

4. The method claimed in claim 1 wherein said primary coil comprises a wire wound cylinder.

5. The method claimed in claim 4 wherein said cylinder is silicone.

6. The method claimed in claim 1 wherein said secondary coil is a preformed coil and is slipped over the open end of said intestinal segment before it is attached to the abdominal wall.

7. A primary coil adapted for use as an extra to-intracorporeal energy transfer device comprising a cylindrical core having a rounded first end and a tapered second end separated by a cylindrical central section;

a wire having first and second ends said wire wrapped around said cylindrical central section;

said first and second ends passing from said cylindrical central section through said tapered second end.