Non-thermal ablation system for treating BPH and other growths
First Claim
1. A minimally invasive method for treating prostate tissue of a prostate in a body via direct current ablation from a urethra transecting the prostate, comprising:
- inserting a catheter into the urethra, wherein a portion of the catheter remains outside of the body when the catheter is in a treatment position proximate the prostate;
deploying a fixation element associated with the catheter to fix the catheter in the treatment position;
deploying a plurality of electrodes through the catheter into the prostate, wherein at least one of the plurality of electrodes is deployed into at least one of a lateral posterior quadrant of the prostate tissue relative to the urethra, a lateral anterior quadrant of the prostate tissue relative to the urethra, or combinations of the prostate tissue relative to the urethra thereof, and wherein the electrodes are separated by an angular spacing;
determining input treatment parameters, wherein the input treatment parameters include a quantity of charge to the prostate tissue;
inputting the input treatment parameters into at least one of a power source and a processor;
using a power source to apply direct current between approximately 10 and 50 mA and a power of less than 3200 mW to each of the plurality of electrodes to deliver the quantity of charge, wherein the direct current applied is based on the input treatment parameters;
wherein upon application of the direct current, at least one of the plurality of electrodes imparts at least one of a high pH and a low pH in a treatment zone proximate to each electrode of the plurality of electrodes to create a necrotic zone in the treatment zone, wherein the application of the direct current is substantially non-thermal;
comparing a measured treatment parameter with at least one of the input treatment parameters; and
stopping the application of direct current to the treatment zone once the measured treatment parameter reaches the at least one input treatment parameter, wherein the at least one input treatment parameter is reached and the application of direct current to the plurality of electrodes is stopped between approximately 15 and 45 minutes with the catheter in the treatment position.
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Accused Products
Abstract
Systems and methods for non-thermal ablation of tissue are provided. A non-implantable minimally invasive system for treatment of tissue in a body via direct current ablation is provided including a catheter, a plurality of electrodes for deployment through the catheter, a power source for applying power to the electrodes, and a fixation element for maintaining the catheter in a treatment position during treatment of the tissue. A minimally invasive method for treating tissue in a body via direct current ablation is provided including inserting a catheter into the body such that a portion of the catheter remains outside of the body, deploying a fixation element to fix the catheter in a treatment position, deploying a plurality of electrodes through the catheter, applying power to the plurality of electrodes, using the electrodes to apply a current to the tissue, and removing the catheter from the body.
150 Citations
29 Claims
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1. A minimally invasive method for treating prostate tissue of a prostate in a body via direct current ablation from a urethra transecting the prostate, comprising:
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inserting a catheter into the urethra, wherein a portion of the catheter remains outside of the body when the catheter is in a treatment position proximate the prostate; deploying a fixation element associated with the catheter to fix the catheter in the treatment position; deploying a plurality of electrodes through the catheter into the prostate, wherein at least one of the plurality of electrodes is deployed into at least one of a lateral posterior quadrant of the prostate tissue relative to the urethra, a lateral anterior quadrant of the prostate tissue relative to the urethra, or combinations of the prostate tissue relative to the urethra thereof, and wherein the electrodes are separated by an angular spacing; determining input treatment parameters, wherein the input treatment parameters include a quantity of charge to the prostate tissue; inputting the input treatment parameters into at least one of a power source and a processor; using a power source to apply direct current between approximately 10 and 50 mA and a power of less than 3200 mW to each of the plurality of electrodes to deliver the quantity of charge, wherein the direct current applied is based on the input treatment parameters; wherein upon application of the direct current, at least one of the plurality of electrodes imparts at least one of a high pH and a low pH in a treatment zone proximate to each electrode of the plurality of electrodes to create a necrotic zone in the treatment zone, wherein the application of the direct current is substantially non-thermal; comparing a measured treatment parameter with at least one of the input treatment parameters; and stopping the application of direct current to the treatment zone once the measured treatment parameter reaches the at least one input treatment parameter, wherein the at least one input treatment parameter is reached and the application of direct current to the plurality of electrodes is stopped between approximately 15 and 45 minutes with the catheter in the treatment position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A minimally invasive method for treating at least one treatment zone of prostate tissue of a prostate in a body via direct current ablation from a urethra transecting the prostate, comprising:
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inserting a catheter into the urethra, wherein a portion of the catheter remains outside of the body when the catheter is in a treatment position proximate the prostate; deploying a fixation element in a urinary bladder, the fixation element being operably coupled to the catheter and operating to fix the catheter in the treatment position; deploying between approximately 4 and 8 electrodes a distance of approximately 14 to 22 mm into both lateral lobes of the prostate, wherein at least one of the between approximately 4 and 8 electrodes is deployed into at least one of a lateral posterior quadrant of the prostate tissue relative to the urethra, a lateral anterior quadrant of the prostate tissue relative to the urethra, or combinations of the prostate tissue relative to the urethra thereof, and wherein electrode pairs each consist of a subset of the between approximately 4 and 8 electrodes are separated from one another by an angular spacing; determining input treatment parameters including a quantity of charge to be delivered to the at least one treatment zone; inputting the input treatment parameters into at least one of a power source and a processor; using a power source to apply a direct current between approximately 10 and 50 mA, a power of less than 3200 mW and the quantity of charge of between approximately 15 and 72 coulombs to each of the electrode pairs of the between 4 and 7 electrodes, wherein the direct current applied is based on the input treatment parameters; wherein upon application of the direct current, at least one electrode of the between approximately 4 and 8 electrodes imparts at least one of a high pH and a low pH in a treatment zone proximate to the at least one electrode of the between approximately 4 and 8 electrodes to create a necrotic zone in the treatment zone, wherein the application of the direct current is substantially non-thermal; comparing a measured treatment parameter with at least one of the input treatment parameters; and stopping the application of the direct current to the treatment zone once the measured treatment parameter reaches the at least one input treatment parameter, wherein the at least one input treatment parameter is reached and the application of the direct current to the between approximately 4 and 8 of electrodes is done in approximately 15 to approximately 45 minutes with the catheter in the treatment position. - View Dependent Claims (27, 28, 29)
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Specification