Multi-fluid tissue ablation methods for treatment of an organ
First Claim
1. A method for tissue modification, comprising:
- inserting a probe into an organ;
delivering a first fluid into the organ to create a working space;
delivering a second fluid through the probe as a fluid stream to the tissue, wherein the second fluid is different from the first fluid, wherein the stream is released with a pressure configured to remove a first tissue and inhibit removal of a second tissue connected to the first tissue, the first tissue comprising a conglomerate of tissue cells, the second tissue comprising one or more of blood vessels, stroma, connective tissue or capsular tissue; and
resecting a volume of the tissue using the fluid stream.
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Accused Products
Abstract
Prostate treatment using fluid stream to resect prostate tissue, thereby relieving symptoms of conditions such as BPH, prostatitis, and prostatic carcinoma. A device having a fluid delivery element is positioned within a lumen of the urethra within the prostate. A fluid stream is directed outwardly from the fluid delivery element toward a wall of the urethral lumen. The fluid delivery element is moved to scan the fluid stream over the wall to remove a volume of tissue surrounding the lumen. The fluid may be combined with therapeutically active substances or with substances that increase resection efficiency. Fluid force may be adjusted to provide selective tissue resection such that soft tissue is removed while harder tissue is left undamaged. In order to gain a working space within the urethra, another fluid may be introduced to insufflate the urethra in the region of treatment.
138 Citations
28 Claims
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1. A method for tissue modification, comprising:
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inserting a probe into an organ; delivering a first fluid into the organ to create a working space; delivering a second fluid through the probe as a fluid stream to the tissue, wherein the second fluid is different from the first fluid, wherein the stream is released with a pressure configured to remove a first tissue and inhibit removal of a second tissue connected to the first tissue, the first tissue comprising a conglomerate of tissue cells, the second tissue comprising one or more of blood vessels, stroma, connective tissue or capsular tissue; and resecting a volume of the tissue using the fluid stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. The method of 17, wherein the removing comprises generating a pressure differential between an outlet for the first fluid and an inlet for the mixture.
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19. A method for tissue modification, comprising:
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inserting a probe into an organ; creating a working space within the organ; delivering a fluid through the probe as a fluid stream to the tissue; and resecting a volume of the tissue using the fluid stream, wherein the stream is released with a pressure configured to remove a first tissue and inhibit removal of a second tissue connected to the first tissue, the first tissue comprising a conglomerate of tissue cells, the second tissue comprising one or more of blood vessels, stroma, connective tissue or capsular tissue. - View Dependent Claims (20)
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21. The method for modifying tissue, comprising:
positioning a device into the tissue, wherein the device comprises a fluid delivery element configured to deliver a fluid stream from the device towards the tissue;
resecting a volume of the tissue by delivering the fluid stream to the tissue; and
setting one or more fluid stream parameters such that the resecting is selective to a particular tissue type, wherein the parameters comprise fluid stream shape, fluid stream flow, or fluid stream source pressure;
wherein the tissue comprises a first tissue a second tissue, the second tissue comprising a capsular and the first tissue comprising tissue contained within the capsule.- View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
Specification