US20140025142A1 - Methods and systems for subcutaneous treatments - Google Patents

Methods and systems for subcutaneous treatments Download PDF

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Publication number
US20140025142A1
US20140025142A1 US14/038,402 US201314038402A US2014025142A1 US 20140025142 A1 US20140025142 A1 US 20140025142A1 US 201314038402 A US201314038402 A US 201314038402A US 2014025142 A1 US2014025142 A1 US 2014025142A1
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Prior art keywords
skin
applicator
patient
spacer pad
subcutaneous tissue
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US14/038,402
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Jan Zarksy
Tomás Schwarz
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BTL Medical Solutions AS
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BTL Holdings Ltd
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Priority to US14/038,402 priority Critical patent/US20140025142A1/en
Publication of US20140025142A1 publication Critical patent/US20140025142A1/en
Priority to US15/060,375 priority patent/US20160220834A1/en
Assigned to BTL HEALTHCARE TECHNOLOGIES A.S. reassignment BTL HEALTHCARE TECHNOLOGIES A.S. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BTL MEDICAL TECHNOLOGIES S.R.O.
Assigned to BTL MEDICAL SOLUTIONS A.S. reassignment BTL MEDICAL SOLUTIONS A.S. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BTL HEALTHCARE TECHNOLOGIES A.S.
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/40—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals
    • A61N1/403—Applying electric fields by inductive or capacitive coupling ; Applying radio-frequency signals for thermotherapy, e.g. hyperthermia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00—Radiation therapy
    • A61N5/02—Radiation therapy using microwaves
    • A61N5/022—Apparatus adapted for a specific treatment
    • A61N5/025—Warming the body, e.g. hyperthermia treatment
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00005—Cooling or heating of the probe or tissue immediately surrounding the probe
    • A61B2018/00011—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids
    • A61B2018/00017—Cooling or heating of the probe or tissue immediately surrounding the probe with fluids with gas
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00452—Skin
    • A61B2018/00458—Deeper parts of the skin, e.g. treatment of vascular disorders or port wine stains
    • A61B2018/00464—Subcutaneous fat, e.g. liposuction, lipolysis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B2018/147—Electrodes transferring energy by capacitive coupling, i.e. with a dielectricum between electrode and target tissue

Definitions

  • the field of the invention is non-invasive, non-traumatic focused remodeling and downsizing subcutaneous lipid-rich cells, body contouring and skin tightening.
  • the invention relates to controlled heating of the targeted areas on the human body using electromagnetic waves without direct contact with the skin.
  • Human skin is composed of three basic elements: the epidermis, the dermis and the hypodermis or so called subcutis.
  • the dermis consists of collagen, elastic tissue and reticular fibers.
  • the hypodermis is the lowest layer of skin and contains hair follicle roots, lymphatic vessels, collagen tissue, nerves and also subcutaneous fat forming an adipose fat tissue.
  • Adipose fat tissue is formed by aggregation of fat cells containing stored lipid (fat). Most fat tissue accumulations result from lipids (fat) primarily from food, when energy intake derived from food exceeds daily energy needs. This may result in an increase in fat cell size or fat cell number or both.
  • Mature fat cells are very large, ranging up to 120 microns in diameter and containing as much as 95% lipid (fat) by volume.
  • the subcutaneous adipose tissue layer may be thin (about 1 cm or less) or in humans of slight or moderate body type.
  • adipose tissue may be perceived as aesthetically undesirable. Dieting and exercise may result in reduction of adipose tissue and weight loss. However, for most people, the reduction in adipose tissue volume occurs rather unpredictably from all anatomical areas. This can leave the areas intended for reduction, for example, the abdomen, largely unaffected, even after significant body weight loss.
  • Various invasive and non-invasive methods have been developed to remove unwanted subcutaneous fat from specific areas of the body.
  • the main invasive method is surgical-assisted liposuction, where selected volumes of subcutaneous fat are mechanically aspirated out from the patient at desired anatomical sites of the body.
  • liposuction procedures are invasive and can be painful and traumatic, with many undesirable side effects and risks.
  • Lipodissolve is another invasive procedure involving a series of drug injections intended to dissolve and permanently remove small pockets of fat from various parts of the body. It also is known as mesotherapy, lipozap, lipotherapy, or injection lipolysis. Lipodissolve also has many disadvantages and risks, to the extent that various medical associations have issued health warnings against using it.
  • the non-invasive methods concentrate on the acceleration of the lipolysis as the natural process of the fat reduction. This can be achieved in several ways. One of them is application of pharmaceuticals accelerating the lipolysis. However, when applied topically they tend only to affect the outermost layers of the skin, rarely penetrating to the subdermal vascular plexus. Another method uses radio frequency or ultrasound energy focused on adipose tissue to cause cell destruction and death. These methods tend to damage the melanocyte in the epidermis. The hyperthermic temperatures destroy the target tissues and leave the body to remove the dead cellular and other debris. Non-invasive heating techniques have also been used. These involve heating the adipose fat tissue to about 40° C. or more via direct contact with a heating element. These non-invasive methods have certain disadvantages as well, and have been used with varying degrees of success.
  • a method for treating subcutaneous tissue includes positioning one or more applicators adjacent to the skin of a patient, but not touching the skin. Electromagnetic energy is transmitted from the applicators into the subcutaneous tissue. The subcutaneous tissue is heated via the electromagnetic energy. The subcutaneous tissue may be remodeled. The volume of lipid-rich cells in the subcutaneous tissue may be reduced via the heating. The electromagnetic waves may be applied in a pulsed mode or in a continuous mode. The skin may optionally be actively cooled, without contacting the skin. This method may also be used for tightening the skin and for remodeling collagen tissue in the subcutaneous tissue. With the applicator not touching the skin, the need for cooling the skin, and bio-compatibility factors are avoided. There is also a lower risk of over heating the skin, and there is no need to continuously move the applicator.
  • FIG. 1 is a schematic diagram of a system for controlled deep heating of sub dermal tissues.
  • FIG. 2 is a schematic view of a trans-regional course of electromagnetic field
  • FIGS. 3 and 4 are schematic examples of positioning of electrodes shown in FIG. 1 .
  • Prior art methods generally require direct contact of an applicator onto the skin. This in turn typically also requires use of active skin cooling elements. Direct skin contact can also raise bio-compatibility issues with the applicator material and further requires high sanitary standards, since the applicators are used for treatment of different patients. The practitioner must also be skilled in using the applicators since there is a risk of burning the patient.
  • the skin may be sufficiently cooled passively by circulating air.
  • the skin may be cooled via a stream of chilled or room temperature air.
  • the present methods also do not require use of cooling fluids and gels. This reduces costs and increases patient comfort.
  • the present methods work on the principle of selective deep heating of the human tissue containing low volume of water, such as adipose tissue.
  • Radiant energy may be provided to the sub dermal tissue by one or more capacitive electrodes generating an electromagnetic field. Selective heating in the dermis occurs due to dielectric losses.
  • An inductive electrode may alternatively be used.
  • the electromagnetic field is applied continuously, which provides a maximum amount of heating.
  • the heat is local and typically limited to about 400 W.
  • a high frequency field is applied in short intervals (typically (50-2000 ⁇ s) and on various pulse frequencies (typically 50 to 1500 Hz).
  • the maximum output with the continuous method is typically limited to 200 W.
  • the increase of the temperature in the dermal and the sub dermal tissues also affects the triple-helix structure of collagen fibers contained in such tissues. This may result in remodeling and rejuvenation of collagen, increase of skin density and dermal thickening based on neocollagenesis. Skin tightening may also be achieved.
  • Remodeling and reducing the volume of subcutaneous lipid-rich cells, and skin tightening in the targeted areas, can change the overall appearance of the body, for use in body contouring and body reshaping.
  • Electromagnetic energy is provided through the skin to the underlying sub dermal tissue, without contacting the skin.
  • the radiant energy is converted into heat in the sub dermal tissue.
  • the radiant energy enables focused heating of the subcutaneous adipose tissue and sub dermal collagen tissue, leading to accelerating lipolysis.
  • the triple-helix structure of collagen fibers may result in remodeling and/or rejuvenation of collagen, increase of skin density and dermal thickening based on neocollagenesis.
  • Subcutaneous lipid-rich cells may be remodeled and/or reduced in volume, contouring and tightening skin tissue.
  • a system 16 applies electromagnetic energy through a skin layer, such as the epidermis, and to the underlying sub dermal tissue, and underlying collagen tissue, causing acceleration of lipolysis and collagen remodeling.
  • the system may include 6 blocks.
  • the power supply 10 is connected to a power source.
  • An HF generator (high frequency generator) 11 and a transmatch and generator control unit 14 , and a microprocessor control unit with user interface 15 are connected to the power supply 10 .
  • the HF generator 11 may generate an electromagnetic field at 13.56 or 40.68 or 27.12 MHz, or 2.45 GHz or optionally at other frequencies as well.
  • the 13.56, 27.12 and 40.68 MHz and 2.45 GHz frequencies avoid creating radio interference, as these frequencies are exclusively assigned as free or open frequencies.
  • the microprocessor control unit with user interface 15 provides communication between the transmatch and generator control unit 14 and user interface, which may be a touch screen on the device display.
  • the transmatch and generator control unit 14 receives information from the operator via the control unit and regulates the operation of the HF generator 11 and the transmatch 12 .
  • the transmatch transmits HF to a balun transformer 13 , which converts unbalanced impedance to balanced impedance.
  • This processed signal goes to two capacitive applicators 6 , which may be positioned approximately 2-3 cm above the surface of the skin or applied on dielectric material which is in contact with the skin surface.
  • FIG. 2 is a schematic representation of a heat distribution under the skin.
  • One or more applicators 6 create an electromagnetic field. This electromagnetic field crosses through the skin 2 , subcutaneous fat 3 and muscle 4 or the bone 5 .
  • Capacitive applicators 6 provide deep heating, which heats selectively only structures with low volume of water.
  • a spacer 7 such as a towel, gauze pad, foam pad, cloth pad, etc. may be placed on the skin, with the applicator then placed on top of the spacer 7 . This automatically sets the separation distance between the applicator and the skin, and prevents the applicator from touching the skin.
  • the spacer 7 may be made of various dielectric or electrically non-conductive materials. The spacer 7 is typically dry in use.
  • a reusable or a disposable spacer may be attached to the applicator.
  • the spacer may comprise posts, a frame, or other structure on the applicator that contacts the skin, while keeping the active surface of the applicator spaced apart from the skin.
  • spacing elements are additional elements and not part of applicator. The methods may be performed with no part or surface of the actuator in contact with the skin.
  • a selective heating process is observed in the dermis 3 due to dielectric losses.
  • Dielectric loss is created as part of an AC electromagnetic field power is converted to heat in the dielectric.
  • polar molecules rotate, and their movement produces the thermal energy.
  • Skin and muscle are largely not affected by electromagnetic field 1 as they contain water and the blood circulation provides for cooling.
  • Bone 5 gets little if any heating because the applicators 6 are positioned to create a field only on the upper structures.
  • the lipid cells of the adipose tissue contain less water than the surrounding tissue and are therefore heated at higher level than the surrounding tissue.
  • FIGS. 3 and 4 are schematic examples of positioning of the applicators or electrodes 6 providing radiant energy through the skin 2 to subcutaneous fat 3 .
  • the electrodes are positioned approximately 2-3 cm above the surface of the skin and separated from the skin by an air gap, or placed onto a spacer 7 which is in contact with the skin surface, as shown in FIG. 2 .
  • the spacer 7 if used, may correspondingly typically be about 0.5 to 1 cm thick.
  • the applicator 6 may be temporarily fixed in position relative to the patient, if desired, for example on a mechanical fixture or holder. It is not necessary in each instance for the applicator to be continuously moving during the procedure. This makes the procedure easier to perform, since user need not constantly keep moving the applicator over the patient's skin.
  • the applicator 6 may have a relatively large surface area, so that the field 1 is distributed more widely through the subcutaneous tissue.
  • the applicator may have a surface area of at least about 15, 30, 50, 100, or 150 cm 2 .
  • applicators may be positioned on opposite sides of the patient.
  • a spacer may be positioned between one or more applicator and the skin of the patient.
  • the electromagnetic waves may be transmitted in the range of 13.553-13.567 or 26.957-27.283 or 40.66-40.70 MHz or 2.4-2.5 GHz from the applicator into the subcutaneous tissue.

Abstract

Methods for focused remodeling and downsizing the volume of subcutaneous lipid-rich cells, body contouring, and tightening skin tissue, using controlled heating of the targeted areas on the body. The electromagnetic energy heats the subcutaneous tissues which provides the desired effect. The electromagnetic energy is applied via an applicator without touching the skin. A spacer of insulating or dielectric material may be provided between the applicator and the skin.

Description

    PRIORITY CLAIM
  • This application is a Continuation of U.S. patent application Ser. No. 13/297,608, filed Nov. 16, 2011, and now pending, and incorporated herein by reference.
    • FIELD OF THE INVENTION
  • The field of the invention is non-invasive, non-traumatic focused remodeling and downsizing subcutaneous lipid-rich cells, body contouring and skin tightening. In particular, the invention relates to controlled heating of the targeted areas on the human body using electromagnetic waves without direct contact with the skin.
    • BACKGROUND OF THE INVENTION
  • Human skin is composed of three basic elements: the epidermis, the dermis and the hypodermis or so called subcutis. The dermis consists of collagen, elastic tissue and reticular fibers. The hypodermis is the lowest layer of skin and contains hair follicle roots, lymphatic vessels, collagen tissue, nerves and also subcutaneous fat forming an adipose fat tissue. Adipose fat tissue is formed by aggregation of fat cells containing stored lipid (fat). Most fat tissue accumulations result from lipids (fat) primarily from food, when energy intake derived from food exceeds daily energy needs. This may result in an increase in fat cell size or fat cell number or both. Mature fat cells are very large, ranging up to 120 microns in diameter and containing as much as 95% lipid (fat) by volume. The subcutaneous adipose tissue layer may be thin (about 1 cm or less) or in humans of slight or moderate body type.
  • Excess adipose tissue may be perceived as aesthetically undesirable. Dieting and exercise may result in reduction of adipose tissue and weight loss. However, for most people, the reduction in adipose tissue volume occurs rather unpredictably from all anatomical areas. This can leave the areas intended for reduction, for example, the abdomen, largely unaffected, even after significant body weight loss. Various invasive and non-invasive methods have been developed to remove unwanted subcutaneous fat from specific areas of the body.
  • The main invasive method is surgical-assisted liposuction, where selected volumes of subcutaneous fat are mechanically aspirated out from the patient at desired anatomical sites of the body. However, liposuction procedures are invasive and can be painful and traumatic, with many undesirable side effects and risks. Lipodissolve is another invasive procedure involving a series of drug injections intended to dissolve and permanently remove small pockets of fat from various parts of the body. It also is known as mesotherapy, lipozap, lipotherapy, or injection lipolysis. Lipodissolve also has many disadvantages and risks, to the extent that various medical associations have issued health warnings against using it.
  • The non-invasive methods concentrate on the acceleration of the lipolysis as the natural process of the fat reduction. This can be achieved in several ways. One of them is application of pharmaceuticals accelerating the lipolysis. However, when applied topically they tend only to affect the outermost layers of the skin, rarely penetrating to the subdermal vascular plexus. Another method uses radio frequency or ultrasound energy focused on adipose tissue to cause cell destruction and death. These methods tend to damage the melanocyte in the epidermis. The hyperthermic temperatures destroy the target tissues and leave the body to remove the dead cellular and other debris. Non-invasive heating techniques have also been used. These involve heating the adipose fat tissue to about 40° C. or more via direct contact with a heating element. These non-invasive methods have certain disadvantages as well, and have been used with varying degrees of success.
  • Accordingly, there is need for improved methods and systems for subcutaneous treatments.
    • SUMMARY OF THE INVENTION
  • New methods have now been invented. A method for treating subcutaneous tissue includes positioning one or more applicators adjacent to the skin of a patient, but not touching the skin. Electromagnetic energy is transmitted from the applicators into the subcutaneous tissue. The subcutaneous tissue is heated via the electromagnetic energy. The subcutaneous tissue may be remodeled. The volume of lipid-rich cells in the subcutaneous tissue may be reduced via the heating. The electromagnetic waves may be applied in a pulsed mode or in a continuous mode. The skin may optionally be actively cooled, without contacting the skin. This method may also be used for tightening the skin and for remodeling collagen tissue in the subcutaneous tissue. With the applicator not touching the skin, the need for cooling the skin, and bio-compatibility factors are avoided. There is also a lower risk of over heating the skin, and there is no need to continuously move the applicator.
    • BRIEF DESCRIPTION OF THE FIGURES
  • FIG. 1 is a schematic diagram of a system for controlled deep heating of sub dermal tissues.
  • FIG. 2 is a schematic view of a trans-regional course of electromagnetic field;
  • FIGS. 3 and 4 are schematic examples of positioning of electrodes shown in FIG. 1.
    •  DETAILED DESCRIPTION
  • Methods and apparatus for focused remodeling and downsizing the volume of subcutaneous lipid-rich cells, body contouring and tightening skin tissue, without contact with the skin, have now been invented. Prior art methods generally require direct contact of an applicator onto the skin. This in turn typically also requires use of active skin cooling elements. Direct skin contact can also raise bio-compatibility issues with the applicator material and further requires high sanitary standards, since the applicators are used for treatment of different patients. The practitioner must also be skilled in using the applicators since there is a risk of burning the patient.
  • These disadvantages are overcome by transmitting electromagnetic energy into the sub subcutaneous tissue, without physical contact with the patient. Contactless application enables simultaneous treatment of large areas of human body. It also avoids the need for artificial cooling of the skin. In the present contactless methods, the skin may be sufficiently cooled passively by circulating air. Optionally, the skin may be cooled via a stream of chilled or room temperature air. The present methods also do not require use of cooling fluids and gels. This reduces costs and increases patient comfort.
  • In one aspect, the present methods work on the principle of selective deep heating of the human tissue containing low volume of water, such as adipose tissue. Radiant energy may be provided to the sub dermal tissue by one or more capacitive electrodes generating an electromagnetic field. Selective heating in the dermis occurs due to dielectric losses. An inductive electrode may alternatively be used.
  • In a continuous application mode, the electromagnetic field is applied continuously, which provides a maximum amount of heating. Using a pulse mode, the heat is local and typically limited to about 400 W. With the pulse mode, a high frequency field is applied in short intervals (typically (50-2000 μs) and on various pulse frequencies (typically 50 to 1500 Hz). The maximum output with the continuous method is typically limited to 200 W.
  • The increase of the temperature in the dermal and the sub dermal tissues also affects the triple-helix structure of collagen fibers contained in such tissues. This may result in remodeling and rejuvenation of collagen, increase of skin density and dermal thickening based on neocollagenesis. Skin tightening may also be achieved.
  • Remodeling and reducing the volume of subcutaneous lipid-rich cells, and skin tightening in the targeted areas, can change the overall appearance of the body, for use in body contouring and body reshaping.
  • Electromagnetic energy is provided through the skin to the underlying sub dermal tissue, without contacting the skin. The radiant energy is converted into heat in the sub dermal tissue. The radiant energy enables focused heating of the subcutaneous adipose tissue and sub dermal collagen tissue, leading to accelerating lipolysis. At the same time the triple-helix structure of collagen fibers may result in remodeling and/or rejuvenation of collagen, increase of skin density and dermal thickening based on neocollagenesis. Subcutaneous lipid-rich cells may be remodeled and/or reduced in volume, contouring and tightening skin tissue.
  • Referring now to FIG. 1, a system 16 applies electromagnetic energy through a skin layer, such as the epidermis, and to the underlying sub dermal tissue, and underlying collagen tissue, causing acceleration of lipolysis and collagen remodeling. The system may include 6 blocks. The power supply 10 is connected to a power source. An HF generator (high frequency generator) 11 and a transmatch and generator control unit 14, and a microprocessor control unit with user interface 15, are connected to the power supply 10. The HF generator 11 may generate an electromagnetic field at 13.56 or 40.68 or 27.12 MHz, or 2.45 GHz or optionally at other frequencies as well. The 13.56, 27.12 and 40.68 MHz and 2.45 GHz frequencies avoid creating radio interference, as these frequencies are exclusively assigned as free or open frequencies.
  • The microprocessor control unit with user interface 15 provides communication between the transmatch and generator control unit 14 and user interface, which may be a touch screen on the device display.
  • The transmatch and generator control unit 14 receives information from the operator via the control unit and regulates the operation of the HF generator 11 and the transmatch 12. The transmatch transmits HF to a balun transformer 13, which converts unbalanced impedance to balanced impedance. This processed signal goes to two capacitive applicators 6, which may be positioned approximately 2-3 cm above the surface of the skin or applied on dielectric material which is in contact with the skin surface.
  • FIG. 2 is a schematic representation of a heat distribution under the skin. One or more applicators 6 create an electromagnetic field. This electromagnetic field crosses through the skin 2, subcutaneous fat 3 and muscle 4 or the bone 5. Capacitive applicators 6 provide deep heating, which heats selectively only structures with low volume of water. A spacer 7 such as a towel, gauze pad, foam pad, cloth pad, etc. may be placed on the skin, with the applicator then placed on top of the spacer 7. This automatically sets the separation distance between the applicator and the skin, and prevents the applicator from touching the skin. The spacer 7 may be made of various dielectric or electrically non-conductive materials. The spacer 7 is typically dry in use. Alternatively, a reusable or a disposable spacer may be attached to the applicator. For example, the spacer may comprise posts, a frame, or other structure on the applicator that contacts the skin, while keeping the active surface of the applicator spaced apart from the skin. As described and claimed here, such spacing elements are additional elements and not part of applicator. The methods may be performed with no part or surface of the actuator in contact with the skin.
  • A selective heating process is observed in the dermis 3 due to dielectric losses. Dielectric loss is created as part of an AC electromagnetic field power is converted to heat in the dielectric. During this process, polar molecules rotate, and their movement produces the thermal energy. Skin and muscle are largely not affected by electromagnetic field 1 as they contain water and the blood circulation provides for cooling. Bone 5 gets little if any heating because the applicators 6 are positioned to create a field only on the upper structures. The lipid cells of the adipose tissue contain less water than the surrounding tissue and are therefore heated at higher level than the surrounding tissue.
  • FIGS. 3 and 4 are schematic examples of positioning of the applicators or electrodes 6 providing radiant energy through the skin 2 to subcutaneous fat 3. The electrodes are positioned approximately 2-3 cm above the surface of the skin and separated from the skin by an air gap, or placed onto a spacer 7 which is in contact with the skin surface, as shown in FIG. 2. The spacer 7, if used, may correspondingly typically be about 0.5 to 1 cm thick. The applicator 6 may be temporarily fixed in position relative to the patient, if desired, for example on a mechanical fixture or holder. It is not necessary in each instance for the applicator to be continuously moving during the procedure. This makes the procedure easier to perform, since user need not constantly keep moving the applicator over the patient's skin. Consequently, the user can accordingly simultaneously attend to other needs of a patient. The applicator 6 may have a relatively large surface area, so that the field 1 is distributed more widely through the subcutaneous tissue. For example, the applicator may have a surface area of at least about 15, 30, 50, 100, or 150 cm2.
  • If more than one applicator is used, applicators may be positioned on opposite sides of the patient. A spacer may be positioned between one or more applicator and the skin of the patient. The electromagnetic waves may be transmitted in the range of 13.553-13.567 or 26.957-27.283 or 40.66-40.70 MHz or 2.4-2.5 GHz from the applicator into the subcutaneous tissue.
  • Thus, novel methods and systems have been shown and described. Various modifications and substitutions may be made without departing from the spirit and scope of the invention. The invention, therefore, should not be limited, except by the following claims and their equivalents.

Claims (12)

1. A method for treating subcutaneous tissue of a patient, comprising:
placing a spacer pad comprising a dielectric material onto the skin of the patient;
positioning an applicator onto the spacer pad, with no part of the applicator in contact with the skin of the patient;
transmitting radio frequency waves from the applicator through the spacer pad and into subcutaneous tissue of the patient;
heating the subcutaneous tissue via the radio frequency waves; and
downsizing the subcutaneous tissue via the heating.
2. The method of claim 1 with the applicator having a surface area of at least 15 cm2.
3. The method of claim 1 further including cooling the patient's skin.
4. The method of claim 1 wherein the spacer pad is 0.5 to 1 cm thick.
5. The method of claim 1 wherein the applicator is spaced apart from the patient's skin by at least 1 cm.
6. The method of claim 1 with the spacer pad having a frame.
7. The method of claim 1 with the spacer pad having a surface area greater than the applicator.
8. The method of claim 8 wherein the spacer pad comprises a dielectric cloth or foam material.
9. A method for treating subcutaneous tissue of a patient, comprising:
placing a spacer pad comprising a dielectric material onto the skin of the patient;
positioning an applicator having a surface area of at least 15 cm2 onto the spacer pad, with no part of the applicator in contact with the skin of the patient and the spacer pad having a surface area greater than the applicator;
transmitting radio frequency waves from the applicator through the spacer pad and into subcutaneous tissue of the patient;
heating the subcutaneous tissue via the radio frequency waves;
with the heating remodeling and/or downsizing the volume of lipid-rich cells in the subcutaneous tissue.
10. The method of claim 9 wherein the spacer pad comprises a dielectric cloth or foam material.
11. The method of claim 9 with the applicator spaced apart from the skin of the patient by at least 1 cm.
12. The method of claim 9 wherein no cooling of the patient's skin is performed.
US14/038,402 2011-11-16 2013-09-26 Methods and systems for subcutaneous treatments Abandoned US20140025142A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/038,402 US20140025142A1 (en) 2011-11-16 2013-09-26 Methods and systems for subcutaneous treatments
US15/060,375 US20160220834A1 (en) 2011-11-16 2016-03-03 Method and system for skin treatment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/297,608 US8548599B2 (en) 2011-11-16 2011-11-16 Methods and systems for subcutaneous treatments
US14/038,402 US20140025142A1 (en) 2011-11-16 2013-09-26 Methods and systems for subcutaneous treatments

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