Method and apparatus for controlled contraction of collagen tissue

• US 5,660,836 A
• Filed: 05/05/1995
• Issued: 08/26/1997
• Est. Priority Date: 05/05/1995
• Status: Expired due to Term

• Current Assignee: Thermage Incorporated (Bausch Health Cos., Inc.)
• Original Assignee: Edward W. Knowlton
• Inventors: Knowlton, Edward W.
• Primary Examiner(s): Hulina, Amy
• Application Number:
  US08/435,544
• Time in Patent Office: 844 Days
• Field of Search: 607/101, 607/96, 607/100, 128/898, 600/2, 600/1, 600/9, 601/15
• US Class Current: 424/400
• CPC Class Codes: A61B 18/12 by passing a current through the tissue to be heated, e.g. high-frequency current
• CPC Class Codes: A61B 18/1206 Generators therefor
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 2018/00488 Esophagus
• CPC Class Codes: A61B 2018/0066 without feedback, i.e. open loop control
• CPC Class Codes: A61M 15/0028 using prepacked dosages, one for each application, e.g. capsules to be perforated or broken-up
• CPC Class Codes: A61M 15/0036 hollow piercing means
• CPC Class Codes: A61M 15/0041 with movable piercing or cutting means
• CPC Class Codes: A61M 2202/064 Powder
• CPC Class Codes: A61M 2205/073 Syringe, piston type
• CPC Class Codes: A61N 5/04 Radiators for near-field treatment

Abstract

A method and apparatus applies radiant energy through the skin to an underlying subcutaneous layer or deeper soft tissue layers that includes loculations of fat with fibrous septae made of collagen tissue. This creates a desired contour effect without substantially modifying melanocytes and other epithelial cells in the epidermis. A membrane conforms a contacting exterior surface of the membrane to a skin layer. One or more thermal electrodes positioned in the membrane. A focussing element focuses thermal energy to the underlying collagen tissue. The focusing element and the electrolytic solution create a reverse thermal gradient from the skin to the collagen tissue. A thermal power source is coupled to the thermal electrodes.

Claims

1. A method of liposculpturing an area of the body including a skin surface with multiple layers, and an underlying area made of a loculation of fat that has collagen tissue as a fibrous septae, comprising:

providing an electromagnetic energy delivery device;

creating a reverse thermal gradient through a surface of the skin while heating the underlying collagen containing tissue;

heating the skin surface and underlying collagen containing tissue sufficiently to partially denature at least a portion of the collagen containing tissue while minimizing cellular destruction;

contracting the collagen containing tissue; and

tightening the skin.

2. The method of claim 1, wherein the reverse thermal gradient produces a net mobilization of intracellular fat.

3. The method of claim 1, wherein the electromagnetic energy delivery device includes one or more RF electrodes.

4. The method of claim 3, further comprising:

a source of electrolytic solution configured to deliver electrolytic solution to the RF electrodes.

5. The method of claim 4, wherein RF energy is transferred from the RF electrodes to the electrolytic solution.

6. The method of claim 5, further comprising:

a cooling fluid lumen positioned in the electromagnetic energy delivery device.

7. The method of claim 6, further comprising a source of cooling medium that is introduced into the cooling fluid lumen.

8. The method of claim 1, wherein the collagen containing tissue is in a subdermal layer.

9. The method of claim 1, wherein the collagen containing tissue is in a deep dermal layer.

10. The method of claim 1, wherein the collagen containing tissue is in a subcutaneous layer.

11. The method of claim 1, wherein the collagen containing tissue is in fascial and muscle tissue.

12. The method of claim 1, wherein the collagen containing tissue is heated to a temperature in the range of 30 to 80 degrees C.

13. The method of claim 1, wherein the collagen containing tissue is heated to a temperature in the range of 30 to 75 degrees C.

14. The method of claim 1, wherein the collagen containing tissue is heated to a temperature in the range of 30 to 70 degrees C.