US5123898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling tissue growth with an applied fluctuating magnetic field
Assignee: Life Resonances Inc
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Filing: 1990-03-20
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Granted: 1992-06-23
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Expires: 2010-03-20
Abstract
Abstract An apparatus and method for regulating tissue growth in vivo are provided. The apparatus includes a magnetic field generator and a magnetic field detector for producing a controlled, fluctuating, directionally oriented magnetic field parallel to a predetermined axis projecting through the target tissue. The field detector samples the magnetic flux density along the predetermined access and provides a signal to a microprocessor which determines the average value of the flux density. The applied magnetic field is oscillated at predetermined frequencies to maintain a preselected ratio of frequency to average flux density. This ratio is maintained by adjusting the frequency of the fluctuating magnetic field and/or by adjusting the intensity of the applied magnetic field as the composite magnetic flux density changes in response to changes in the local magnetic field to which the target tissue is subjected. By maintaining these precise predetermined ratios of frequency to average magnetic flux density, growth characteristics of the target tissue are controlled.
Inventors
- 👤 Abraham R. Liboff
- 👤 Bruce R. McLeod
- 👤 Stephen D. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:56
CPC Classifications
A; A61; A61N; A61N2/00; A61N2/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A method of applying a magnetic field to living tissue comprising the steps of: 1) determining a desired composite magnetic flux having a static field component; 2) applying a fluctuating magnetic flux to living tissue along an axis; 3) sensing the actual composite magnetic flux along the desired axis in the living tissue, wherein the actual composite magnetic flux includes a component of the fluctuating applied magnetic flux and a component of a naturally existing static magnetic flux; and 4) comparing the actual composite magnetic flux to the desired composite magnetic flux, determining an error value, and modifying the applied magnetic flux to correct the error value.
Claim 2
Independent Claim
107 words
A method of applying a magnetic field to living tissue comprising the steps of: 1) determining a desired composite magnetic flux having a static field component; 2) applying a fluctuating magnetic flux to living tissue along an axis; 3) sensing the actual composite magnetic flux along the desired axis in the living tissue, wherein the actual composite magnetic flux includes a component of the fluctuating applied magnetic flux and a component of a naturally existing static magnetic flux; and 4) comparing the actual composite magnetic flux to the desired composite magnetic flux, determining an error value, and modifying the applied magnetic flux to correct the error value.
Claim 3
Dependent Claim
68 words
A method as recited in the claim 1, wherein a microprocessor stores the desired values of step 1, the microprocessor also being utilized to perform the functions of step 4, including comparing the actual and desired composite magnetic flux values and determing the error value, the microprocessor also determining a signal to be sent to a power source for the applied magnetic flux to correct the error value.
Claim 4
Dependent Claim
57 words
A method as recited in claim 1, wherein the composite magnetic flux is sensed by a hall effect sensor, the hall effect sensor sending an analog signal to an analog-to-digital converter to produce a digital output which is in turn sent to a comparator to compare the actual composite magnetic flux to the desired composite magnetic flux.
Claim 5
Dependent Claim
20 words
The method recited in claim 1, wherein said static field component is a component of a naturally existing magnetic flux.
Claim 6
Independent Claim
143 words
An apparatus for controlling tissue growth by applying a magnetic field thereto comprising: means to store values for a desired composite magnetic flux having a static field component; means for applying a magnetic flux to living tissue along an axis; means for sensing the actual composite magnetic flux, including said static field component, along said axis in the living tissue; and means in association with said value storage means and said flux sensing means to compare said actual composite magnetic flux and said desired composite magnetic flux, and to reach an error value corresponding to the difference between said actual composite magnetic flux and said desired composite magnetic flux, and means to send said error value to said means for applying a magnetic flux to the living tissue to adjust the strength of said applied magnetic flux, and to correct said error value.
Claim 7
Independent Claim
143 words
An apparatus for controlling tissue growth by applying a magnetic field thereto comprising: means to store values for a desired composite magnetic flux having a static field component; means for applying a magnetic flux to living tissue along an axis; means for sensing the actual composite magnetic flux, including said static field component, along said axis in the living tissue; and means in association with said value storage means and said flux sensing means to compare said actual composite magnetic flux and said desired composite magnetic flux, and to reach an error value corresponding to the difference between said actual composite magnetic flux and said desired composite magnetic flux, and means to send said error value to said means for applying a magnetic flux to the living tissue to adjust the strength of said applied magnetic flux, and to correct said error value.
References Cited (Backward Citations)
US3566877A
Cited
US3890953A
Cited
US3893462B1
Cited
US3893462A
Cited
US3911930A
Cited
US3952751A
Cited
US4105017A
Cited
US4266532A
Cited
US4428366A
Cited
US4459988A
Cited
US4622295A
Cited
US4535775A
Cited
US4683873A
Cited
US4654574A
Cited
US4561426A
Cited
US4600010A
Cited
US4616629A
Cited
US4757804A
Cited
US4932951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-23 | 1995-12-23 | 1996-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-23 | 1999-12-23 | 2000-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-23 | 2003-12-23 | 2004-06-23 | $7700.00 | Window Closed / Lapsed |