Noninvasive devices, methods, and systems for shrinking of tissues
First Claim
1. A method for teaching, the method comprising:
- demonstrating cooling of a surface with a probe; and
demonstrating directing of energy from the probe through the surface and into an underlying structure to effect shrinkage of the structure.
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Accused Products
Abstract
The invention provides improved devices, methods, and systems for shrinking of collagenated tissues, particularly for treating urinary incontinence in a noninvasive manner by directing energy to a patient'"'"'s own support tissues. This energy heats fascia and other collagenated support tissues, causing them to contract. The energy can be applied intermittently, often between a pair of large plate electrodes having cooled flat electrode surfaces, the electrodes optionally being supported by a clamp structure. Such cooled plate electrodes are capable of directing electrical energy through an intermediate tissue and into fascia while the cooled electrode surface prevents injury to the intermediate tissue, particularly where the electrode surfaces are cooled before, during, and after an intermittent heating cycle. Ideally, the plate electrode comprises an electrode array including discrete electrode surface segments so that the current flux can be varied to selectively target the fascia. Alternatively, chilled “liquid electrodes” may direct current through a selected portion of the bladder (or other body cavity) while also cooling the bladder wall, an insulating gas can prevent heating of an alternative bladder portion and the adjacent tissues, and/or ultrasound transducers direct energy through an intermediate tissue and into fascia with little or no injury to the intermediate tissue. Cooled electrodes may be used to chill an intermediate engaged tissue so as to cause the maximum temperature difference between the target tissue and the intermediate tissue prior to initiating RF heating. This allows the dimensions of tissue reaching the treatment temperature to be controlled and/or minimized, the dimensions of protected intermediate tissue to be maximized, and the like.
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Citations
48 Claims
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1. A method for teaching, the method comprising:
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demonstrating cooling of a surface with a probe; and
demonstrating directing of energy from the probe through the surface and into an underlying structure to effect shrinkage of the structure.
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2. A system for therapeutically heating a target zone within a tissue, the system comprising:
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a first electrode having a first electrode surface which is engageable against the tissue;
a second electrode having a second electrode surface which can be aligned substantially parallel to the first electrode surface with the tissue therebetween so that an electrical current flux between the electrodes can substantially evenly heat the target zone; and
a cooling system coupled to at least one of the electrodes for cooling the electrode surface. - View Dependent Claims (3, 4, 5)
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6. A method for therapeutically heating a target zone of a patient body, the target zone disposed within a tissue between first and second tissue surfaces, the method comprising:
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engaging a first electrode surface against the first tissue surface;
aligning a second electrode surface substantially parallel with the first electrode surface and against the second tissue surface;
applying an electrical potential between the first and second electrodes, the electrical potential producing an electrical current flux between the electrodes which heats the target zone; and
cooling at least one of the first and second tissue surfaces with the engaged electrode.
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7. A method for heating a target tissue within a patient body, the tissue separated from a body cavity by an intermediate tissue, the method comprising:
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providing a conductive fluid within the cavity;
passing an electrical current from or through the conductive fluid, through the intermediate tissue, and into the target tissue to effect heating of the target tissue; and
cooling the intermediate tissue.
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8. A method for shrinking a target tissue within a patient body, the target tissue separated from a body cavity by an intermediate tissue, the method comprising:
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introducing a conductive fluid into the cavity;
introducing an insulating fluid into the cavity;
positioning the fluids within the cavity by orienting the patient so that the conductive fluid is disposed adjacent the target tissue and the insulating fluid is disposed away from the target tissue, the conductive and insulating fluids having different densities;
heating the target tissue by passing an electrical current from the conductive fluid, through the intermediate tissue, and into the target tissue; and
cooling the intermediate tissue.
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9. A method for treating urinary incontinence, the method comprising:
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introducing a fluid into the bladder;
transmitting electrical current from or through the fluid, through a bladder wall, and into a pelvic support tissue so that the current heats and shrinks the pelvic support tissue and inhibits urinary incontinence; and
cooling the bladder wall with the conductive fluid.
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10. A system for shrinking a pelvic support tissue of a patient body, the pelvic support tissue separated from a urinary bladder by a bladder wall, the system comprising:
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a first probe having a proximal end, a distal end adapted for transurethral insertion into the bladder, a first electrode near the distal end, a fluid inflow port near the distal end, and a sealing member proximal of the inflow port for sealing a conductive fluid within the bladder such that the first electrode is electrically coupled to the bladder wall by the conductive fluid;
a second electrode adapted for transmitting current to a tissue surface of the patient body; and
a power source coupled to the first and second electrodes to heat and shrink the pelvic support tissue.
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11. A system for shrinking a pelvic support tissue of a patient body, the pelvic support tissue separated from a urinary bladder by a bladder wall, the system comprising:
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a first probe having a proximal end, a distal end adapted for transurethral insertion into the bladder, and a first electrode near the distal end;
a second probe having a proximal end, a distal end adapted for insertion into the vagina, and a second electrode near the distal end; and
a power source coupled to the first and second electrodes to heat and shrink the pelvic support tissue. - View Dependent Claims (12)
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13. A system for shrinking a target tissue of a patient body through a tissue surface, the system comprising:
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a probe having a first electrode for electrically coupling the probe to the tissue surface;
a second electrode for coupling to the patient body;
a controller coupled to the first and second electrodes, the controller adapted to intermittently energize the electrodes with an RF current so that the electrodes heat and shrink the target tissue. - View Dependent Claims (14)
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15. A device for therapeutically heating tissue, the device comprising:
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a first electrode having an electrode surface;
a cooling system thermally coupled to the first electrode;
a second electrode mechanically coupled to the first electrode so that an electrode surface of the second electrode is oriented toward the first electrode surface. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for selectively shrinking a target tissue, the method comprising:
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clamping a target tissue between a plurality of electrode surfaces;
heating the clamped target tissue by transmitting a current flux between the electrode surfaces;
cooling at least one of the electrodes to limit heating of intermediate tissue disposed between the at least one electrode and the target tissue.
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27. A method for heating a target tissue within a patient body, the target tissue separated from a tissue surface by an intermediate tissue, the method comprising:
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acoustically coupling an ultrasound transmitter to the tissue surface; and
focussing ultrasound energy from the transmitter through the intermediate tissue and onto the target tissue so that the target tissue is therapeutically heated. - View Dependent Claims (28, 29)
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- 30. A system for heating a target tissue, the target tissue being separated from a tissue surface by an intermediate tissue, the system comprising a probe having an ultrasound transmitter for focussing ultrasound energy through the intermediate tissue so as to heat the target tissue.
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33. A method for selectively heating a predetermined target tissue, the target tissue adjacent another tissue, the method comprising:
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generating a temperature differential between the adjacent tissue and the target tissue; and
heating the target tissue by conducting a heating electrical current into the target tissue after generating the temperature differential so that the temperature differential urges the heating current from the adjacent tissue into the target tissue;
wherein the heating step ablates the target tissue, the target tissue comprising a tumor.
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34. A system for selectively heating a predetermined target tissue, the target tissue adjacent another tissue, the system comprising:
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a probe having a surface oriented for engaging a tissue surface;
a member selected from the group consisting of a pre-cooler and a pre-heater coupled to the probe surface so as to produce a temperature differential between the target tissue and the adjacent tissue; and
at least one tissue heating electrode coupleable to the target tissue to conduct an electrical current into the tissues, the at least one heating electrode defining a nominal current distribution when the current is conducted into the tissues and the tissues are at a uniform body temperature, the at least one heating electrode producing a tailored current distribution when the current is conducted into the tissues and the tissues exhibit the temperature differential, the tailored current distribution resulting in less collateral damage to the adjacent tissues than the nominal current distribution when the target tissue is heated by the current to a treatment temperature. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification