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US6006756: Non-contact magnetoresonant implant system and techniques for periodic corneal re-shaping

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Filing Information

Inventor(s) John H. Shadduck ·
Assignee(s) None listed in document.
Primary Examiner Cary O'Connor ·
Assistant Examiner Navin Natnithithadha ·
Application Number US9128056
Filing date 08/03/1998
Issue date 12/28/1999
Predicted expiration date 08/03/2018
U.S. Classifications 128/899  · 600/9  ·
International Classifications A61F 1300  ·
Kind CodeA
International Classifications 128899 ·
6 Claims, No Drawings


Abstract

A system and technique called magnetoresonant induction of an intrastromal implant that is adapted for corneal re-shaping. The technique is utilized to correct mild to high hyperopia and presbyopia by steepening the anterior corneal curvature in a single treatment, or in periodic treatments over the lifetime of the patient. The system comprises a combination of components including (i) at least one implantable magnetoresonant intrastromal segment, and (ii) an oscillating magnetic field generator together with a dosimetry control system including at least one emitter body adapted for positioning proximate to the patient's eye and intrastromal implant. The system can deliver thermal effects to appropriate stromal lamellae by non-contact inductive heating of the implant which in turn contracts or compresses stromal collagen fibrils into a circumferential cinch about an anterior layer of the cornea and steepens the anterior corneal curvature. A dosimetry control system controls the power level and duration of exposure of the oscillating magnetic field(s) and may be combined with intraoperative corneal topography.

Independent Claims | See all claims (6)

  1. 1. A combination for altering the curvature of a human cornea for refractive purposes, comprising:a magnetic field responsive implant for intrastromal implantation; andan oscillating magnetic field emitter capable of positioning proximate to said implant.
  2. 2. A method for altering the curvature of a human cornea for refractive purposes, comprising:implanting at least one magnetic field responsive implant in a patient's cornea; andapplying an oscillating magnetic field proximate to said at least one implant having sufficient strength to resonate said implant until the implant temperature reaches from 55.degree. C. to 85.degree. C.;wherein the temperature of said implant alters the molecular structure of proximate collagen fibrils to develop circumferential tension forces to alter cornea curvature.
  3. 6.6. A method for non-contact delivery of thermal effects to a vessel wall in an interior of a patient's body for therapeutic purposes:implanting at least one magnetic field responsive prosthesis in a patient's body; andapplying an oscillating magnetic field proximate to said at least one prosthesis having sufficient strength to resonate said prosthesis until the prosthesis temperature reaches from 55.degree. C. to 85.degree. C.;wherein the temperature of said prosthesis damages cells proximate to the prosthesis.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US4381007 The United States of America as represented by the United States Department of Energy Doss Apr 1983
US5533999 Refractec, Inc. Hood et al. Jul 1996
US5766171 KeraVision, Inc. Silvestrini Jun 1998

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US6102906 Andrew F. Phillips Aug 2000
US6306075 John H. Shadduck Oct 2001
US6293939 Roger F. Steinert Sep 2001
US7004953 FOS Holding S.A. Ioannis Pallikaris et al. Feb 2006
US7156859 FOS Holding S.A. Ioannis Pallikaris et al. Jan 2007
US6543453 ScienceVision L.L.C. William L. Klima et al. Apr 2003
US6511508 Environmental Robots, Inc. Mohsen Shahinpoor et al. Jan 2003
US7635388 Thomas D. Tyler Dec 2009
US6673104 SciMed Life Systems, Inc. Robert Barry Jan 2004
US7090696 Environmental Robots, Inc. Mohsen Shahinpoor et al. Aug 2006
US7060094 Ophthalmotronics, Inc. Mohsen Shahinpoor et al. Jun 2006
US6436028 Soundtec, Inc. Kenneth J. Dormer Aug 2002
US7628809 Thomas D. Tyler Dec 2009
US7470286 Thomas D. Tyler Dec 2008
US7378048 Boston Scientific Scimed, Inc. Thomas C. Eidenschink May 2008
US7708750 FOS Holdings S.A. Ioannis Pallikaris et al. May 2010
US7744596 Boston Scientific Scimed, Inc. Kimbolt Young et al. Jun 2010
US7828790 Boston Scientific Scimed, Inc. Stephen Griffin Nov 2010
US7918806 Boston Scientific Scimed, Inc. Stephen Griffin et al. Apr 2011
US7981062 IMI Intelligent Medical Implants AG Alan Y. Chow et al. Jul 2011
US8043290 The Regents of the University of California, San Francisco Michael R. Harrison et al. Oct 2011
US8123803 Mohsen Shaninpoor et al. Feb 2012
US8236052 Thomas D. Tyler Aug 2012
US8142454 The Regents of the University of California, San Francisco Michael R. Harrison et al. Mar 2012
US8328791 Stryker Corporation Stephen Griffin Dec 2012
US8439915 --
US8728062 --

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