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US5295955A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for microwave aided liposuction

Assignee: AMT Inc
•
Filing: 1992-02-14
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Granted: 1994-03-22
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Expires: 2012-02-14
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Abstract

Abstract Fatty tissue involved in a liposuction procedure is treated with microwave energy (also known as RF). In a particular embodiment of the invention, the microwave energy is applied by means of a catheter including a suction lumen, an electromagnetic transmission line, and an antenna coupled to the distal end of the transmission line. A microwave generator coupled to the distal end of the transmission line causes radiation from the antenna into the fatty tissue adjacent to the distal suction port of the suction lumen, which tissue is thereby heated and softened. The softened fatty tissue is more readily detached from the adjacent tissue than in the absence of heat, and less mechanical force is required for removal. In another embodiment of the invention, the transmission line is formed so that the electromagnetic field extends into the suction lumen, so that the fatty tissue being removed therethrough continues to be heated. Saline solution or other liquid with polar molecules is injected into the region being treated to provide improved coupling of energy between the electromagnetic radiation and the fatty tissue. Microwave radiation may be applied to the region being treated by means of an external radiator. The heating effect of the radiation not only softens the tissue for ready removal, but also tends to sterilize the region for reducing infection.

Inventors

  • 👤 Daniella Rosen
  • 👤 Arye Rosen

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 16:00
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/1815; A61B2018/00315; A61B2018/00452; A61B2018/00458; A61B2018/00464; A61M; A61M2202/00; A61M2202/08; A61N; A61N5/00; A61N5/02; A61N5/022; A61N5/025

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 74 words
A method for liposuction, comprising the steps of: inserting a distal end of a hollow tube catheter into a body region of fatty tissue to be treated: applying suction to a proximal end of said tube to thereby tend to draw material from said region to be treated; and radiating RF/microwave energy to said region to be treated during said step of applying suction, to heat and thereby tend to soften said fatty tissue.
Claim 2
Independent Claim 74 words
A method for liposuction, comprising the steps of: inserting a distal end of a hollow tube catheter into a body region of fatty tissue to be treated: applying suction to a proximal end of said tube to thereby tend to draw material from said region to be treated; and radiating RF/microwave energy to said region to be treated during said step of applying suction, to heat and thereby tend to soften said fatty tissue.
Claim 3
Dependent Claim 30 words
A method according to claim 1, further comprising the step of introducing a polar liquid into said region to be treated for aiding in transforming said RF/microwave energy into heat.
Claim 4
Dependent Claim 22 words
A method according to claim 2, wherein said step of introducing a polar liquid includes the step of introducing an aqueous liquid.
Claim 5
Dependent Claim 35 words
A method according to claim 1, wherein said step of introducing an aqueous liquid comprises the step of generating a flow of said liquid through at least a portion of said region to be treated.
Claim 6
Dependent Claim 50 words
A method according to claim 4, wherein said step of generating a flow includes the further steps of; generating a flow of said aqueous liquid into said region to be treated; and sucking a mixture of said aqueous liquid and said fatty tissue toward said proximal end of said catheter.
Claim 7
Dependent Claim 34 words
A method according to claim 1, wherein said step of radiating RF/microwave energy includes the step of radiating electromagnetic energy toward said region to be treated from a directional antenna located outside said body.
Claim 8
Dependent Claim 33 words
A method according to claim 1, wherein said step of radiating RF/microwave energy includes the step of introducing said energy into said region to be treated by means of an electromagnetic transmission line.
Claim 9
Dependent Claim 45 words
A method according to claim 1, wherein said step of radiating RF/microwave energy includes the step of applying alternating voltage to a pair of electrodes, one of which is within said region to be treated, and the other one of which is outside said body.
Claim 10
Dependent Claim 37 words
A method according to claim 1, wherein said step of introducing a hollow tube catheter includes the step of concurrently inserting an electromagnetic antenna and a portion of a transmission line into said region to be treated.
Claim 11
Dependent Claim 28 words
A method according to claim 9 wherein said step of radiating RF/microwave energy includes the step of applying microwave energy to a proximal end of said transmission line.
Claim 12
Dependent Claim 42 words
A method according to claim 1, wherein said step of radiating RF/microwave energy includes the step of controlling the amount of said energy to tend to maintain the temperature of said fatty tissue in the range of about 45° to 50° C.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1997-03-21 1997-09-20 1998-03-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2001-03-21 2001-09-20 2002-03-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2005-03-21 2005-09-20 2006-03-22 $7700.00 Window Closed / Lapsed

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