Plasma-generating device, plasma surgical device and use of a plasma surgical device
First Claim
1. A plasma surgical device having an operational end, the plasma surgical device comprising:
- an anode at the operational end of the plasma surgical device, the anode having a hole therethrough;
a cathode having a tapered portion narrowing toward the anode;
an intermediate electrode, having a hole therethrough, the intermediate electrode being arranged between the cathode and the anode;
an end sleeve forming an outer casing of the operation end of the plasma surgical device, the end sleeve having an outer diameter of less than 5 mm; and
an insulator sleeve extending along and surrounding only a portion of the cathode and having a distal end,wherein the hole through the intermediate electrode and the hole through the anode, at least in part, form a first channel for conducting plasma and discharging a plasma jet through an external outlet opening at the operational end of the plasma surgical device;
wherein a gap between the end sleeve and the intermediate electrode and a gap between the end sleeve and the anode, at least in part, form a second channel for conducting a coolant for cooling the intermediate electrode and the anode for discharging the coolant through one or more external outlet openings at the operational end of the plasma surgical device;
wherein the end sleeve of the plasma surgical device is replaceable so as to provide different external outlet openings of the first and second channels corresponding to different desired properties and performance characteristics of the plasma surgical device,wherein only a part of the tapered portion of the cathode projects beyond the distal end of the insulator sleeve, andwherein a distal end of the cathode is located some distance away from an inlet of the first channel.
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Accused Products
Abstract
The present invention relates to a plasma-generating device, comprising an anode, a cathode and at least one intermediate electrode, said intermediate electrode being arranged at least partly between said anode and said cathode, and said intermediate electrode and said anode forming at least a part of a plasma channel which has an opening in said anode. Further, the plasma-generating device comprises at least one coolant channel which is arranged with at least one outlet opening which is positioned beyond, in the direction from the cathode to the anode, said at least one intermediate electrode, and the channel direction of said coolant channel at said outlet opening has a directional component which is the same as that of the channel direction of the plasma channel at the opening thereof. The invention also concerns a plasma surgical device and use of such a plasma surgical device.
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Citations
27 Claims
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1. A plasma surgical device having an operational end, the plasma surgical device comprising:
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an anode at the operational end of the plasma surgical device, the anode having a hole therethrough; a cathode having a tapered portion narrowing toward the anode; an intermediate electrode, having a hole therethrough, the intermediate electrode being arranged between the cathode and the anode; an end sleeve forming an outer casing of the operation end of the plasma surgical device, the end sleeve having an outer diameter of less than 5 mm; and an insulator sleeve extending along and surrounding only a portion of the cathode and having a distal end, wherein the hole through the intermediate electrode and the hole through the anode, at least in part, form a first channel for conducting plasma and discharging a plasma jet through an external outlet opening at the operational end of the plasma surgical device; wherein a gap between the end sleeve and the intermediate electrode and a gap between the end sleeve and the anode, at least in part, form a second channel for conducting a coolant for cooling the intermediate electrode and the anode for discharging the coolant through one or more external outlet openings at the operational end of the plasma surgical device; wherein the end sleeve of the plasma surgical device is replaceable so as to provide different external outlet openings of the first and second channels corresponding to different desired properties and performance characteristics of the plasma surgical device, wherein only a part of the tapered portion of the cathode projects beyond the distal end of the insulator sleeve, and wherein a distal end of the cathode is located some distance away from an inlet of the first channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18, 19, 20, 21)
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16. A method of using a plasma surgical device having a cathode including a tapered portion narrowing toward an anode, an insulator sleeve extending along and surrounding only a portion of the cathode and having a distal end, only a part of the tapered portion of the cathode projecting beyond the distal end of the insulator sleeve, a distal end of the cathode being located some distance away from an inlet of a first channel, and a second channel and a replaceable end sleeve forming an outer casing of the operational end of the plasma surgical device, said sleeve providing different external outlet openings of the first and second channels corresponding to different desired properties and performance characteristics of the plasma surgical device, the method comprising:
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discharging a plasma jet on a spot of a biological tissue from an outlet opening of the first channel in the end sleeve; cooling electrodes of the plasma surgical device by passing a coolant through the second channel; and discharging the coolant near the spot of the biological tissue through one or more outlet openings of the second channel in the end sleeve. - View Dependent Claims (17, 25, 26, 27)
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22. A plasma-generating device comprising:
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a plasma chamber for generating plasma, a plasma channel extending longitudinally from the plasma chamber to a plasma outlet at an operational end of the of the plasma-generating device, the plasma channel defining a path for discharge of the plasma; an anode at the operational end of the plasma-generating device with the plasma channel passing therethrough; a cathode having a tapered portion narrowing toward the anode, only a part of the tapered portion projecting into the plasma chamber, a distal end of the cathode being located some distance away from an inlet of the plasma channel; an intermediate electrode, the intermediate electrode being arranged between the cathode and the anode with the plasma channel passing therethrough; and a coolant channel extending longitudinally in the plasma-generating device and having a coolant outlet at the operational end of the of the plasma-generating device, whereby coolant liquid flowing through the coolant channel cools a portion of the plasma-generating device proximate to the cooling channel and the coolant liquid discharges through the coolant outlet. - View Dependent Claims (23, 24)
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Specification