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Title: Method and apparatus for cartilage reshaping by radiofrequency heating

Patent ·
OSTI ID:1174390
; ; ;

A method and apparatus for reshaping cartilage using radiofrequency heating. The cartilage temperature is raised sufficiently for stress relaxation to occur in the cartilage, but low enough so that significant denaturation of the cartilage does not occur. The RF electrodes may be designed to also function as molds, preses, clamps, or mandrills to deform the cartilage tissue. Changes in various properties of the cartilage associated with stress relaxation in the cartilage may be measured in order to provide the control signal to provide effective reshaping without denaturation.

Research Organization:
Univ. of California, Oakland, CA (United States); The Board of Regents, The University of Texas System, Austin, TX (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
95-3800459
Assignee:
The Regents of the University of California (Oakland, CA); The Board of Regents, The University of Texas System (Austin, TX)
Patent Number(s):
6,589,235
Application Number:
09/770,799
OSTI ID:
1174390
Country of Publication:
United States
Language:
English

References (27)

Scanning Force Microscopy of the Fine Structure of Cartilage Irradiated with a CO2 Laser journal January 2000
Theoretical modeling of heating and structure alterations in cartilage under laser radiation with regard to water evaporation and diffusion dominance conference May 1998
Effect of wavelength on threshold and kinetics of tissue denaturation under laser radiation conference June 1999
Stress Relaxation of Porcine Septal Cartilage During Nd:YAG (λ=1.32 μm) Laser Irradiation: Mechanical, Optical, and Thermal Responses journal October 1998
Optical properties of nasal septum cartilage
  • Bagratashvili, Nodar V.; Sviridov, Alexander P.; Sobol, Emil N.
  • BiOS '98 International Biomedical Optics Symposium, SPIE Proceedings https://doi.org/10.1117/12.308189
conference May 1998
Laser shaping of composite cartilage grafts journal November 1993
Cartilage reshaping with holmium laser conference January 1996
Phenomenon of cartilage shaping using moderate heating and its applications in otorhinolaryngology conference January 1996
Laser reshaping of nasal septum cartilage: clinical results for 40 patients
  • Sobol, Emil N.; Sviridov, Alexander P.; Bagratashvili, Victor N.
  • BiOS 2000 The International Symposium on Biomedical Optics, SPIE Proceedings https://doi.org/10.1117/12.386265
conference May 2000
Stress relaxation of porcine septal cartilage during radio-frequency-generated heating conference May 2000
Viability of porcine nasal septal cartilage grafts following Nd:YAG (n=1.32μm) laser radiation conference June 2000
Laser-assisted cartilage reshaping: in vitro and in vivo animal studies conference May 1995
Dynamics of optical and mechanical properties of cartilage at laser heating conference December 1996
Thermo-optical response of cartilage during feedback-controlled laser-assisted reshaping conference May 1997
Characterization of temperature-dependent biophysical properties during laser mediated cartilage reshaping journal January 1999
The optical properties of porcine nasal cartilage journal January 1999
Stress relaxation and cartilage shaping under laser radiation conference May 1996
Heating and structural alterations in cartilage under laser radiation journal April 1999
Laser Reshaping of Cartilage journal August 2000
Thermal and diffusion processes in laser-induced stress relaxation and reshaping of cartilage journal August 1997
Shaping of nasal septal cartilage with the carbon dioxide laser—a preliminary report of an experimental study journal March 1994
Measurement of radiometric surface temperature and integrated backscattered light intensity during feedback-controlled laser-assisted cartilage reshaping journal January 1998
In-vivo study and histological examination of laser reshaping of cartilage
  • Sviridov, Alexander P.; Sobol, Emil N.; Bagratashvili, Victor N.
  • BiOS '99 International Biomedical Optics Symposium, SPIE Proceedings https://doi.org/10.1117/12.350966
conference June 1999
The effect of holmium laser radiation on stress, temperature and structure of cartilage journal January 1998
Mechanism of laser-induced stress relaxation in cartilage conference June 1997
Feedback-controlled cartilage reshaping with an Nd:YAG laser: effects of pH variation conference July 1998
Feedback-Controlled Laser-Mediated Cartilage Reshaping journal October 1999

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