Electrical applicators for applying energy to tissue surfaces or regions superficial to the surface
Treatment applicators and methods including treatment applicators for delivering electrical energy to a target tissue that are configured to reduce or eliminate arcing as well as provide enhance targeting to tissue surfaces or regions just below the surface of the tissue.
1 . A device for delivery of electrical treatment, the device comprising:
an electrode housing extending from a distal end of the device;
a first electrode or set of electrodes on or configured to extend from a distal outer face of the electrode housing, wherein the first electrode or set of electrodes are arranged about a first length along the distal outer face of the electrode housing;
a second electrode or set of electrodes on or configured to extend from the distal outer face of the electrode housing, wherein the second electrode or set of electrodes are arranged about a second length along the distal outer face of the electrode housing that is parallel to the first length; and
a suction port through the electrode housing and extending continuously along the distal outer face of the electrode housing between the first electrode or set of electrodes and the second electrode or set of electrodes, wherein the suction port extends further than the first length and the second length along the distal outer face of the electrode housing so as to prevent arcing between the first electrode or set of electrodes and the second electrode or set of electrodes.
2 . The device of claim 1 , wherein a strike distance, comprising a minimum path length between the first electrode or set of electrodes and the second electrode or set of electrodes around the suction port, is 5% or more longer than a minimum distance between the first electrode or sets of electrodes and the second electrode or set of electrodes extending across the suction port.
3 . The device of claim 1 , wherein a strike distance, comprising a minimum path length between the first electrode or set of electrodes and the second electrode or set of electrodes and around the suction port, is 10% or more longer than a minimum distance between the first electrode or sets of electrodes and the second electrode or set of electrodes extending across the suction port.
4 . The device of claim 1 , wherein the suction port at least partially surrounds the first electrode or set of electrodes.
5 . The device of claim 1 , further comprising a second suction port through the electrode housing and extending continuously between the first electrode or set of electrodes and the second electrode or set of electrodes.
6 . The device of claim 1 , further comprising a first outer suction port arranged along the distal outer face on a side of the first electrode or set of electrodes opposite from the suction port, and a second outer suction port arranged along the distal outer face on a side of the second electrode or set of electrodes opposite from the suction port.
7 . The device of claim 1 , wherein the suction port comprises a C-shaped opening through the distal outer face of the electrode housing.
8 . The device of claim 1 , wherein the suction port comprises an I-shaped opening through the distal outer face of the electrode housing.
9 . The device of claim 1 , wherein the electrode housing is configured to extend and retract relative to the distal end of the device.
10 . The device of claim 1 , wherein the first electrode or set of electrodes and the second electrode or set of electrodes comprise non-penetrating electrodes.
11 . The device of claim 1 , wherein the first electrode or set of electrodes and the second electrode or set of electrodes comprise tissue penetrating electrodes.
12 . The device of claim 1 , further comprising one or more circumferential seals around the suction port and configured to seal the distal end of the device against a target tissue when suction is applied through the suction port.
13 . The device of claim 1 , further comprising a suction channel within the electrode housing in fluid communication with the suction port.
14 . The device of claim 1 , wherein the device is configured as a treatment tip, further wherein the device comprises a mechanical and/or electrical connector at a proximal end of the treatment tip configured to removably couple to a handpiece.
15 . The device of claim 1 , wherein the device comprises a reusable handpiece and a replaceable treatment tip, wherein the replaceable treatment tip is configured to releasably couple to the reusable handpiece through one or more electrical connectors and a vacuum connector.
16 . The device of claim 15 , further comprising a pulse generator configured to couple to the reusable handpiece and a source of negative pressure within the reusable handpiece.
17 . A method, the method comprising:
applying a distal end of a treatment applicator against a tissue;
contacting the tissue with a first electrode or first set of electrodes positioned about a first length along a distal outer face of an electrode housing and a second electrode or second set of electrodes positioned about a second length along the distal outer face of the electrode housing of the treatment applicator;
preventing arcing between the first electrode or first set of electrodes and the second electrode or second set of electrodes by applying suction through a suction port extending continuously along the distal outer face between the first electrode or first set of electrodes and the second electrode or second set of electrodes and longer than the first length and the second length so that the tissue contacts the suction port between and extending beyond on either side of the first electrode or first set of electrodes and the second electrode or second set of electrodes; and
applying a pulsed electrical treatment to the tissue from the first electrode or first set of electrodes and the second electrode or second set of electrodes.
18 . The method of claim 17 , wherein preventing arcing comprises applying suction through the suction port configured such that a minimum path length between the first electrode or first set of electrodes and the second electrode or second set of electrodes around the suction port is 5% or more longer than a minimum distance between the first electrode or first sets of electrodes and the second electrode or second set of electrodes that extends across the suction port.
19 . The method of claim 17 , wherein contacting the tissue comprises penetrating the tissue with the first electrode or first set of electrodes and the second electrode or second set of electrodes.
20 . The method of claim 17 , wherein contacting the tissue comprises applying the first electrode or first set of electrodes and the second electrode or second set of electrodes to the tissue without penetrating the tissue.
21 . The method of claim 17 , wherein contacting the tissue comprises driving the distal end of the treatment applicator against the tissue to retract the electrode housing into an applicator housing of the treatment applicator against a housing bias force.
22 . The method of claim 17 , further comprising sealing the distal end of the treatment applicator against the tissue.
23 . The method of claim 17 , further comprising coupling a treatment tip to a reusable handpiece to assemble the treatment applicator before applying the distal end of the treatment applicator against the tissue.
24 . A device for delivery of electrical treatment, the device comprising:
a first electrode or set of electrodes on or configured to extend from a tip portion of the device, wherein the first electrode or set of electrodes have a first length configured to be in contact with tissue when the tip portion of the device is positioned for electrical treatment;
a second electrode or set of electrodes on or configured to extend from the tip portion of the device, wherein the second electrode or set of electrodes have a different polarity from the first electrode or set of electrodes; and
a suction barrier extending continuously along and further than the first length and partially or fully surrounding the first electrode or set of electrodes so as to increase a strike distance between electrodes of different polarity and prevent arcing between the first electrode or set of electrodes and the second electrode or set of electrodes.
25 . The device of claim 24 , wherein the second electrode or set of electrodes have a second length configured to be in contact with tissue when the tip portion of the device is positioned for tissue treatment.
26 . The device of claim 25 , wherein the second length is parallel to the first length.
27 . The device of claim 25 , further comprising a second suction barrier extending continuously along the second length and partially or fully surrounding the second electrode or set of electrodes.
28 . The device of claim 24 , wherein the suction barrier comprises one or more suction ports positioned adjacent to and separating the first electrode or the set of electrodes from the second electrode or the sets of electrodes.
29 . The device of claim 27 , wherein the suction barrier and/or the second suction barrier has a C-shaped opening.
30 . The device of claim 24 , the device comprising a distal end angled relative to a long axis of the device.
31 . The device of claim 24 , wherein the device is configured to reduce arcing between the first electrode or set of electrodes and the second electrode or set of electrodes when operating at high voltages of 1kV/cm or more.
32 . The device of claim 24 , wherein the first electrode or set of electrodes and the second electrode or set of electrodes comprise non-penetrating electrodes.
33 . The device of claim 24 , further comprising a suction connector configured to couple with a source of negative pressure.
34 . The device of claim 24 , wherein the strike distance, comprising a shortest path between the first electrode or set of electrodes and the second electrode or set of electrodes that goes around the suction barrier, is 5% or more longer than a minimum distance between the first electrode or set of electrodes and the second electrode or set of electrodes extending across and ignoring the suction barrier.