CA2263346A1 - Improved transcutaneous electromagnetic energy transfer - Google Patents

Improved transcutaneous electromagnetic energy transfer

Info

Publication number
CA2263346A1
CA2263346A1 CA002263346A CA2263346A CA2263346A1 CA 2263346 A1 CA2263346 A1 CA 2263346A1 CA 002263346 A CA002263346 A CA 002263346A CA 2263346 A CA2263346 A CA 2263346A CA 2263346 A1 CA2263346 A1 CA 2263346A1
Authority
CA
Canada
Prior art keywords
particles
transmitting
receiving
energy transfer
coils
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002263346A
Other languages
French (fr)
Other versions
CA2263346C (en
Inventor
James C. Chen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Light Sciences Corp
Original Assignee
Light Sciences Limited Partnership
James C. Chen
Light Sciences Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Light Sciences Limited Partnership, James C. Chen, Light Sciences Corporation filed Critical Light Sciences Limited Partnership
Publication of CA2263346A1 publication Critical patent/CA2263346A1/en
Application granted granted Critical
Publication of CA2263346C publication Critical patent/CA2263346C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/372—Arrangements in connection with the implantation of stimulators
    • A61N1/378—Electrical supply
    • A61N1/3787—Electrical supply from an external energy source
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0001—Means for transferring electromagnetic energy to implants

Abstract

A method and apparatus for enhancing transcutaneous energy transfer to provide power to a medical device that is disposed within the body of a patient. A
magnetic field is created by an external transmitting coil (200), which induces an electrical current in a receiving coil (300) that has been placed under the patient's skin (100). The flux path magnetic permeability between the receiving and transmitting coils is enhanced by the implantation of particles (120) into dermis (104) within the skin at that site. The particles, which comprise soft iron or other material having a characteristic high magnetic permeability, are preferably implanted using either a hypodermic needle (150) or a medical air injection device (160). A biocompatible material such as TeflonTM is applied as a coating (123) to the particles. To implant the particles, they are preferably first suspended in a liquid, forming a mixture that is readily delivered to the desired location. The particles are dispersed in a deposit below the epidermis, so that the deposit is between pole faces of the transmitting and the receiving coils. The efficiency of transcutaneous power transfer increases because the magnetic flux density coupling the transmitting and receiving coils is improved by the particles.
CA002263346A 1996-08-29 1997-06-26 Improved transcutaneous electromagnetic energy transfer Expired - Fee Related CA2263346C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/705,334 US5715837A (en) 1996-08-29 1996-08-29 Transcutaneous electromagnetic energy transfer
US08/705,334 1996-08-29
PCT/US1997/011051 WO1998008565A1 (en) 1996-08-29 1997-06-26 Improved transcutaneous electromagnetic energy transfer

Publications (2)

Publication Number Publication Date
CA2263346A1 true CA2263346A1 (en) 1998-03-05
CA2263346C CA2263346C (en) 2001-03-13

Family

ID=24833009

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002263346A Expired - Fee Related CA2263346C (en) 1996-08-29 1997-06-26 Improved transcutaneous electromagnetic energy transfer

Country Status (6)

Country Link
US (1) US5715837A (en)
EP (1) EP0925087A4 (en)
JP (1) JP2000501319A (en)
AU (1) AU720815B2 (en)
CA (1) CA2263346C (en)
WO (1) WO1998008565A1 (en)

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Also Published As

Publication number Publication date
AU720815B2 (en) 2000-06-15
WO1998008565A1 (en) 1998-03-05
US5715837A (en) 1998-02-10
CA2263346C (en) 2001-03-13
AU3504097A (en) 1998-03-19
EP0925087A1 (en) 1999-06-30
EP0925087A4 (en) 2001-02-21
JP2000501319A (en) 2000-02-08

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