Device for treating cancer and non-malignant tumors and methods
First Claim
1. An RF ablation device for delivering chemotherapeutic agents to a tissue treatment site and for creating a diffusion barrier capsule to impede diffusion of chemotherapeutic agents from the tissue treatment site, the ablation device comprising:
- a hollow tubular Rf electrode having a closed, sharpened distal tip and a conductive surface to which Rf power is supplied to heat the tissue treatment site to a temperature between about 45°
C. and 170°
C. to produce a diffusion barrier capsule, the Rf electrode also including a plurality of fluid distribution ports distributed along the length of the electrode for delivering chemotherapeutic agents to the tissue treatment site; and
a fluid distribution port blocking implement positioned within the hollow tubular Rf electrode whose position within the electrode is adjustable to prevent fluid from passing through one or more of the plurality of fluid distribution ports.
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Accused Products
Abstract
A method of this invention for treating body tissues containing cancerous cells or non-malignant tumors with RF ablation, alone or in combination with systemic or localized chemotherapy comprising introducing a stylet comprising an electrode surface and a sleeve longitudinally moveable thereon into the vicinity of the body tissues, retracting the sleeve from a portion of the electrode surface, and supplying RF power to the electrode surface sufficient to heat the tissue to a temperature of above about 45° C. for a time to cause reduction of tissue mass in the vicinity of the electrode. The RF power supplied to the electrode surface is sufficient to effect a desiccated fluid diffusion barrier capsule surrounding the body tissue being treated. The stylet can include a hollow tube having fluid distribution ports therein, and the method can include the step of passing fluid through one or more distribution ports into the body tissue being treated. The fluid can be saline or a chemotherapeutic fluid such as liquid or gas containing a cytotoxic agent, for example. The fluid can be administered in a variety of procedures. The fluid can be passed through a distribution port into the body tissue before, during and/or after the RF power is supplied to the electrode surface, for example. Preferably, the fluid is introduced after a barrier capsule has been formed. The devices comprises electrodes having a hollow core and a closed sharpened distal tip. The electrode has a plurality of fluid distribution ports therein for distribution of fluid treatment agents into the tissue.
801 Citations
19 Claims
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1. An RF ablation device for delivering chemotherapeutic agents to a tissue treatment site and for creating a diffusion barrier capsule to impede diffusion of chemotherapeutic agents from the tissue treatment site, the ablation device comprising:
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a hollow tubular Rf electrode having a closed, sharpened distal tip and a conductive surface to which Rf power is supplied to heat the tissue treatment site to a temperature between about 45°
C. and 170°
C. to produce a diffusion barrier capsule, the Rf electrode also including a plurality of fluid distribution ports distributed along the length of the electrode for delivering chemotherapeutic agents to the tissue treatment site; anda fluid distribution port blocking implement positioned within the hollow tubular Rf electrode whose position within the electrode is adjustable to prevent fluid from passing through one or more of the plurality of fluid distribution ports. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16)
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11. A method for delivering chemotherapeutic agents to a tissue treatment site and for impeding diffusion of the chemotherapeutic agents from the tissue treatment site through the creation of a diffusion barrier capsule, the method comprising the steps of:
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a) introducing an Rf ablation device into a tissue treatment site, the device including a hollow tubular Rf electrode having a closed, sharpened distal tip, an electrode conductive surface for conducting Rf ablation, and a plurality of fluid distribution ports distributed along the length of the electrode for delivering chemotherapeutic agents to the tissue treatment site; b) supplying Rf power to the electrode to produce a diffusion barrier capsule at the tissue treatment site; and c) introducing chemotherapeutic agents to the tissue treatment site through at least one of the fluid distribution ports, the diffusion barrier capsule impeding the diffusion of the chemotherapeutic agents from the tissue treatment site. - View Dependent Claims (12, 13)
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17. A method for delivering chemotherapeutic agents to a tissue treatment site and for impeding diffusion of the chemotherapeutic agents from the tissue treatment site through the creation of a diffusion barrier capsule, the method comprising the steps of:
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a) introducing an Rf ablation device into a tissue treatment site, the device including a hollow tubular Rf electrode having a closed, sharpened distal tip, an electrode conductive surface for conducting Rf ablation, and a plurality of fluid distribution ports distributed along the length of the electrode for delivering chemotherapeutic agents to the tissue treatment site, the device further including a fluid distribution port blocking implement positioned within the hollow tubular Rf electrode, the position of the blocking implement within the electrode being adjustable to prevent fluid from passing through one or more of the plurality of fluid distribution ports; b) supplying Rf power to the electrode to produce a diffusion barrier capsule at the tissue treatment site; c) adjusting the position of the blocking implement to prevent fluid from passing through one or more of the plurality of fluid distribution ports; and d) introducing chemotherapeutic agents to the tissue treatment site through at least one fluid distribution port, the diffusion barrier capsule impeding the diffusion of the chemotherapeutic agents from the tissue treatment site.
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18. A method for delivering chemotherapeutic agents to a tissue treatment site and for impeding diffusion of the chemotherapeutic agents from the tissue treatment site through the creation of a diffusion barrier capsule, the method comprising the steps of:
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a) introducing an Rf ablation device into a tissue treatment site, the device including a hollow tubular Rf electrode having a closed, sharpened distal tip, a plurality of fluid distribution ports distributed along the length of the electrode for delivering chemotherapeutic agents to the tissue treatment site, and a plurality of conductive segments for delivering Rf energy, each segment being insulated from neighboring segments and connected to a power delivery controller which controls the power delivered to each conductive segment; b) selecting the power delivered to each conductive segment using the power delivery controller; c) supplying Rf power to the electrode to produce a diffusion barrier capsule at the tissue treatment site; and d) introducing chemotherapeutic agents to the tissue treatment site through at least one fluid distribution port, the diffusion barrier capsule impeding the diffusion of the chemotherapeutic agents from the tissue treatment site. - View Dependent Claims (19)
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Specification