Plasma-based chemical source device and method of use thereof

• US 9,288,886 B2
• Filed: 05/29/2009
• Issued: 03/15/2016
• Est. Priority Date: 05/30/2008
• Status: Active Grant

• Current Assignee: Colorado State University Research Foundation
• Original Assignee: Colorado State University Research Foundation
• Inventors: Koo, Il-Gyo, Moore, Cameron A., Collins, George J.
• Primary Examiner(s): Hassanzadeh, Parviz
• Assistant Examiner(s): Antolin, Stanislav
• Application Number:
  US12/995,106
• Publication Number:
  US 20110139751A1
• Time in Patent Office: 2,482 Days
• Field of Search: 118/723.E, 118/723.ER, 118/732.R, 118/723.MP, 118/723.MW, 118/723.ME, 118/726, 118/695, 118/696, 118/723.R, 118/715, 118/720, 118/723.IR, 156/345.44, 156/345.24, 156/345.47, 156/345.48, 156/345.49, 156/345.33, 156/345.3, 156/345.43, 216/67, 250/423.R, 250/424, 250/425, 250/426, 250/423.F, 427/569, 604/19, 604/22, 604/23, 604/24, 604/25, 606/9, 606/20, 606/23, 606/25, 606/34, 606/39, 606/40, 606/41, 606/45, 606/48, 606/49, 606/50, 607/100, 607/101, 422/1, 422/4, 422/21, 422/186, 422/186.01, 422/186.03, 422/186.4, 422/186.5
• US Class Current: 1/1
• CPC Class Codes: A61B 18/042 using additional gas becoming plasma
• CPC Class Codes: C23C 16/513 using plasma jets
• CPC Class Codes: H01J 37/32348 Dielectric barrier discharge
• CPC Class Codes: H01J 37/3255 Material
• CPC Class Codes: H05H 1/2406 using dielectric barrier discharges, i.e. with a dielectric interposed between the electrodes
• CPC Class Codes: H05H 1/2418 the electrodes being embedded in the dielectric
• CPC Class Codes: H05H 1/2431 using cylindrical electrodes, e.g. rotary drums
• CPC Class Codes: H05H 1/2443 the plasma fluid flowing through a dielectric tube
• CPC Class Codes: H05H 1/245 the plasma being activated using internal electrodes

Abstract

The present disclosure provides for a plasma system including a plasma device coupled to a power source, an ionizable media source and a precursor source. During operation, the ionizable media source provides ionizable media and the precursor ionizable media source provides one or more chemical species, photons at specific wavelengths, as well as containing various reactive functional groups and/or components to treat the workpiece surface by working in concert for synergetic selective tissue effects. The chemical species and the ionizable gas are mixed either upstream or midstream from an ignition point of the plasma device and once mixed, are ignited therein under application of electrical energy from the power source. As a result, a plasma effluent and photon source is formed, which carries the ignited plasma feedstock and resulting mixture of reactive species to a workpiece surface to perform a predetermined reaction.

Claims

1. An electro surgical system for application of plasma to tissue comprising:

an electro surgical pencil including;

a housing including a dielectric tube having an optically reflective coating on an inner surface of the dielectric tube; and

a removable reactive material coated on the inner surface; and

an active electrode;

an ionizable media source configured to supply ionizable media to the electro surgical pencil;

a precursor source configured to supply at least one precursor feedstock to electro surgical pencil; and

a power source coupled to the active electrode and configured to ignite the ionizable media, the removable reactive material, and the precursor feedstock at the electro surgical pencil to form a plasma volume, wherein the at least one precursor feedstock and the ionizable media are mixed and ignited concurrently.

2. The electrosurgical system according to claim 1, further comprising a microcontroller for controlling a flow of the ionizable media and the precursor feedstock.

3. The electrosurgical system according to claim 2, further comprising a first regulator valve coupled to the ionizable media source and a second regulator valve coupled to the precursor source, wherein the first and second regulator valves are coupled to the microcontroller.

4. The electrosurgical system according to claim 1, wherein the ionizable media is selected from the group consisting of argon, helium, neon, krypton, xenon, radon, nitrogen, hydrogen, oxygen, carbon dioxide, nitrous oxide, and mixtures thereof.

5. The electrosurgical system according to claim 1, wherein the at least one precursor feedstock is a compound having a functional group selected from the group consisting of acyl halide, alcohol, aldehyde, alkane, alkene, amide, amine, butyl, carboxlic, cyanate, isocyanate, ester, ether, ethyl, halide, haloalkane, hydroxyl, ketone, methyl, nitrate, nitro, nitrile, nitrite, nitroso, peroxide, hydroperoxide, oxygen, hydrogen, nitrogen, and combinations thereof.

6. The electrosurgical system according to claim 1, wherein the at least one precursor feedstock is selected from the group consisting of water, haloalkanes, peroxides, alcohols, amines, alkyls, alkenes, alkalines, and combinations thereof.

7. The electrosurgical system according to claim 1, wherein the precursor source includes at least one of a bubbler, a microfluidic device, a nebulizer, a micropump, a piezoelectric pump, or an ultrasonic vaporizer.

8. The electrosurgical system according to claim 1, wherein the electrosurgical pencil includes a return electrode disposed on an outer surface of the dielectric tube.

9. The electrosurgical system according to claim 8, wherein the active and the return electrodes are capacitively coupled to the plasma volume.

13. The electrosurgical system according to claim 1, wherein the electrosurgical pencil is a hand-held electrosurgical pencil, the power source is an electrosurgical generator, and the plasma volume is configured to at least one of substitute or replace surface-terminating species of biological tissue surfaces.

10. An electro surgical system for application of plasma to tissue including:

an electro surgical pencil including;

a housing including a dielectric tube having an optically reflective coating on an inner surface of the dielectric tube; and

a removable reactive material coated on the inner surface; and

an active electrode;

an ionizable media source configured to supply ionizable media to the electro surgical pencil;

a plurality of precursor sources, each of the precursor sources configured to supply at least one precursor feedstock to the electro surgical pencil; and

a power source coupled to the active electrode and configured to ignite the ionizable media, the removable reactive material, and the precursor feedstock at the electro surgical pencil to form a plasma volume, wherein the at least one precursor feedstock and the ionizable media are mixed and ignited concurrently.

11. The electrosurgical system according to claim 10, wherein the electrosurgical pencil includes input controls to activate each of the plurality of the precursor sources individually.

12. The electrosurgical system according to claim 10, further comprising a microcontroller for controlling a flow of the ionizable media and at least one of the precursor feedstock.

14. The electrosurgical system according to claim 10, wherein the electrosurgical pencil is a hand-held electrosurgical pencil, the power source is an electrosurgical generator, and the plasma volume is configured to at least one of substitute or replace surface-terminating species of biological tissue surfaces.