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US 6,537,273 B1Granted
Device and method for removing large tissue masses
OwnerAlexander K. D. Sosiak, Borys R. Krynyckyiinventors
Life of this patent
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Abstract
The invention provides a device and method for reducing or segmenting a large tissue mass in a body cavity during a minimally invasive surgery. This is accomplished with using a device that uses both mechanical and electro-surgical mechanisms by creating an electrical path between two electrodes through the tissue mass. The invention uses an isolation bag to insulate the electrical path created from the body cavity.
Claims46
A device for reducing tissue mass comprising:
- an isolation bag surrounding the tissue mass, the bag having an inner conductive layer, the inner conductive layer constituting a first electrode;
- a trochar extending into the isolation bag;
- a probe introduced into the bag through the trochar to contact the tissue mass, the probe constituting a second electrode;
- and
- a source of electrical current for supplying electrical current to the probe and the inner layer of the bag;
- wherein the probe includes a plurality of independent conductive electrodes and each electrode is supplied by an independent source of electrical current.
3 more elements
A device for reducing tissue mass comprising:
- an isolation bag surrounding the tissue mass, the bag having an inner conductive layer, the inner conductive layer constituting a first electrode;
- a trochar extending into the isolation bag;
- a probe introduced into the bag through the trochar to contact the tissue mass, the probe constituting a second electrode;
- and
- a source of electrical current for supplying electrical current to the probe and the inner layer of the bag;
- wherein the probe includes a plurality of independent conductive electrodes and the electrodes are formed of segmented disks stacked in a rod-like arrangement.
3 more elements
A device for reducing tissue mass comprising:
- an isolation bag surrounding the tissue mass, the bag having an inner conductive layer and an outer non-conductive layer, the inner conductive layer constituting a first electrode;
- a trochar extending into the isolation bag;
- a probe introduced into the bag through the trochar to contact the tissue mass, the probe constituting a second electrode;
- and
- a source of electrical current for supplying electrical current to the probe and the inner layer of the bag, wherein the outer non-conductive layer comprises sensors to detect current leakage.
2 more elements
A device for reducing tissue mass comprising:
- an isolation bag surrounding the tissue mass, the bag having an inner conductive layer and an outer non-conductive layer, the inner conductive layer constituting a first electrode;
- a trochar extending into the isolation bag;
- a probe introduced into the bag through the trochar to contact the tissue mass, the probe constituting a second electrode;
- and
- a source of electrical current for supplying electrical current to the probe and the inner layer of the bag, wherein the outer non-conductive layer comprises sensors to monitor temperature.
2 more elements
A device for segmenting tissue mass comprising:
- an isolation bag having an open end, the bag being capable of being introduced into a body cavity while in a collapsed state and being expandable from the collapsed state to an expanded state to surround the tissue mass when inserted into the body cavity, the open end of the bag containing the tissue mass positioned outside the body cavity;
- a trochar having a distal cap end and a moveable proximal cap end;
- a cage of electrosurgical wires capable of surrounding the tissue mass, the wires having ends connected to the proximal cap end, the cage of electrosurgical wires held in formation by the distal cap end of the trochar and retracted by moving the proximal cap end;
- a center rod that passes through the trochar and into the bag;
- a source of electrical current for supplying current to the cage of electrosurgical wires and the center rod.
2 more elements
A device for reducing tissue mass in a body cavity comprising:
- an insulated bag having an open end, the bag being capable of being introduced into the body cavity while in a collapsed state and being expandable from the collapsed state to an expanded state to surround the tissue mass, the open end of the bag containing the tissue mass being withdrawn from the body cavity;
- a trochar having a distal end;
- a wall comprising a right end cap, a left end cap, and a conductive surface on one side of the wall facing the tissue mass, the wall deployable into the bag through the trochar;
- at least one wire loop positioned within the bag, the loop having ends that pass through the right and left end caps of the wall;
- tensioning means for applying tension to at least one of the ends of the loop to reduce the diameter of the loop so that the tissue mass contacts the conductive surface of the wall;
- and
- a source of electrical current for supplying current to the conductive surface and the wire loop, wherein an electrical path is formed between the loop and the conductive surface.
4 more elements
A method for segmenting a tissue mass in a body cavity comprising steps of:
- holding a device of the type including an insulated bag having an open end, the bag being capable of being introduced into the body cavity while in a collapsed state and being expandable from the collapsed state to an expanded state to surround the tissue mass, the open end of the bag containing the tissue mass being withdrawn from the body cavity;
- a trochar having a distal end;
- a swing arm assembly comprising a plurality of swing arm members, each swing arm member having a conductive surface facing the tissue mass, the swing arms deployable into the bag through the trochar;
- at least one wire loop positioned within the bag, the loop having ends that pass through slits defined in the swing arm members;
- tensioning means for applying tension to at least one of the ends of the loop to reduce the diameter of the loop so that the tissue mass contacts the conductive surface of the wall;
- a source of electrical current for supplying current to the conductive surface and the wire loop, wherein an electrical path is formed between the loop and the conductive surface;
- surrounding the tissue mass with an isolation bag, the isolation bag including an open end;
- and
- segmenting the tissue mass into a plurality of smaller pieces by creating an electrical path between at least one wire loop and a deployable electrically conducting surface by applying tension to the wire loops.
6 more elements
A method for reducing a tissue mass in a body cavity comprising steps of:
- holding a device of the type including an insulated bag having an open end, the bag being capable of being introduced into the body cavity while in a collapsed state and being expandable from the collapsed state to an expanded state to surround the tissue mass, the open end of the bag containing the tissue mass being withdrawn from the body cavity;
- a trochar having a distal end;
- a swing arm assembly comprising a plurality of swing arm members, each swing arm member having a conductive surface facing the tissue mass, the swing arms deployable into the bag through the trochar;
- at least one wire loop positioned within the bag, the loop having ends that pass through slits defined in the swing arm members;
- tensioning means for applying tension to at least one of the ends of the loop to reduce the diameter of the loop so that the tissue mass contacts the conductive surface of the wall;
- a source of electrical current for supplying current to the conductive surface and the wire loop, wherein an electrical path is formed between the loop and the conductive surface;
- surrounding the tissue mass with an isolation bag, the isolation bag including an open end;
- and
- segmenting the tissue mass into a plurality of smaller pieces by creating an electrical path between an electrically conducting inner layer of the isolation bag and a probe having at least one electrically exposed electrode.
6 more elements
A device for reducing tissue mass in a body cavity comprising:
- an insulated bag having an open end, the bag being capable of being introduced into the body cavity while in a collapsed state and being expandable from the collapsed state to an expanded state to surround the tissue mass, the open end of the bag containing the tissue mass being withdrawn from the body cavity;
- a trochar having a distal end;
- a swing arm assembly comprising a plurality of swing arm members, each swing arm member having a conductive surface facing the tissue mass, the swing arms deployable into the bag through the trochar;
- at least one wire loop positioned within the bag, the loop having ends that pass through slits defined in the swing arm members;
- tensioning means for applying tension to at least one of the ends of the loop to reduce the diameter of the loop so that the tissue mass contacts the conductive surface of the wall;
- and
- a source of electrical current for supplying current to the conductive surface and the wire loop, wherein an electrical path is formed between the loop and the conductive surface.
4 more elements
Dependencies are inferred from the claim text.