摘要:
A system, ablation probe, and method is provided for treating tissue, e.g., tissue having tumors. The treatment system is configured to automatically deliver infusaid to tissue when needed and comprises an ablation probe having an ablative element and at least one perfusion exit port. The system further comprises an ablation source operably coupled to the ablative element, and a pump assembly operably coupled to the perfusion exit pots). The pump assembly is configured for pumping infusaid out through the perfusion exit port(s), preferably during the ablation process. The system further comprises a feedback device configured for controlling the amount of infusaid displaced by the pump assembly based on a sensed tissue parameter, e.g., tissue temperature or tissue impedance.
摘要:
A medical kit and method for treating an ailment, such as chronic pain is provided. The kit comprises first and second medical leads, e.g., stimulation leads. Each lead comprises an elongated body and at least one operative element. The first medical lead comprises a coupling mechanism, such as a slot, and the second medical lead comprises a complementary mechanism, such as a rail, that slidably engages the coupling mechanism of the first medical lead. The method may comprise delivering the first medical lead into a patient's body, e.g., into the epidural space of the patient, and delivering the second medical lead into the patient's body by sliding the complementary coupling mechanism of the second medical lead along the coupling mechanism of the first medical lead.
摘要:
A medical lead and method of treating a patient are provided. The medical lead comprises an electrically insulative tubular membrane, a resilient spring element associated with the insulative membrane, and at least one electrode associated with the insulative membrane. The medical lead is configured to be collapsed into a compact form for percutaneous delivery into the patient, thereby obviating the need to perform an invasive surgical procedure on the patient. The body formed by these elements, when expanded, can be sized to fit within the epidural space of a patient. The patient can be treated by placing the medical lead into a collapsed state by applying a compressive force to the medical lead, percutaneously delivering the collapsed medical lead into the patient adjacent tissue to be treated, and placing the medical lead into an expanded state by releasing the compressive force.
摘要:
A method of treating a neurological disorder in a patient is provided. The method comprises intravascularly delivering a stimulation lead within the head of the patient, and placing the stimulation lead adjacent brain tissue (e.g., cortical brain tissue or deep brain tissue), the stimulation of which will treat the neurological disorder. The stimulation lead can be placed into indirect contact with the brain tissue (e.g., through a blood vessel) or indirect contact with the brain tissue (e.g., when placed within the ventricular cavity or by being introduced through an exit point within a vessel wall). Optionally, the method comprises implanting a source of stimulation within the patient's body, and then electrically coupling the proximal end of the stimulation lead, which conveniently extends from the access point within the circulatory system, to the implanted stimulation source. Using the stimulation lead, the brain tissue can then be stimulated in order to treat the neurological disorder.
摘要:
A surface electrode for ablating tissue is provided. The surface electrode comprises a base, a plurality of tissue penetrating needle electrodes extending from the surface of the base an adjustable distance, and an electrical interface coupled to the plurality of needle electrodes. The adjustability of the needle electrodes allows the depth that the needle electrodes penetrate through tissue to be adjusted.
摘要:
A medical kit and method for treating an ailment, such as chronic pain is provided. The kit comprises first and second medical leads, e.g., stimulation leads. Each lead comprises an elongated body and at least one operative element. The first medical lead comprises a coupling mechanism, such as a slot, and the second medical lead comprises a complementary mechanism, such as a rail, that slidably engages the coupling mechanism of the first medical lead. The method may comprise delivering the first medical lead into a patient's body, e.g., into the epidural space of the patient, and delivering the second medical lead into the patient's body by sliding the complementary coupling mechanism of the second medical lead along the coupling mechanism of the first medical lead.
摘要:
A medical kit and method for treating an ailment, such as chronic pain is provided. The kit comprises first and second medical leads, e.g., stimulation leads. Each lead comprises an elongated body and at least one operative element. The first medical lead comprises a coupling mechanism, such as a slot, and the second medical lead comprises a complementary mechanism, such as a rail, that slidably engages the coupling mechanism of the first medical lead. The method may comprise delivering the first medical lead into a patient's body, e.g., into the epidural space of the patient, and delivering the second medical lead into the patient's body by sliding the complementary coupling mechanism of the second medical lead along the coupling mechanism of the first medical lead.
摘要:
A surface electrode for ablating tissue is provided. The surface electrode comprises a base, a plurality of tissue penetrating needle electrodes extending from the surface of the base an adjustable distance, and an electrical interface coupled to the plurality of needle electrodes. The adjustability of the needle electrodes allows the depth that the needle electrodes penetrate through tissue to be adjusted.
摘要:
A system, ablation probe, and method is provided for treating tissue, e.g., tissue having tumors. The treatment system is configured to automatically deliver infusaid to tissue when needed and comprises an ablation probe having an ablative element and at least one perfusion exit port. The system further comprises an ablation source operably coupled to the ablative element, and a pump assembly operably coupled to the perfusion exit port(s). The pump assembly is configured for pumping infusaid out through the perfusion exit port(s), preferably during the ablation process. The system further comprises a feedback device configured for controlling the amount of infusaid displaced by the pump assembly based on a sensed tissue parameter, e.g., tissue temperature or tissue impedance. For example, the feedback device can comprise a sensor configured for sensing the tissue parameter, and a perfusion controller configured for controlling the pump assembly based on the sensed tissue parameter. As another example, the feedback device can comprise a perfusion valve associated with the distal end of the shaft. In this case, the perfusion valve forms the perfusion exit port, wherein the perfusion valve changes the size of the perfusion exit port based on tissue temperature.An ablation probe is provided for treating tissue, e.g., tissue having a tumor. The ablation comprises an elongated shaft, an ablative element, a perfusion lumen that extends through the probe shaft, and a perfusion control valve associated with the distal end of the shaft. The perfusion control valve has a port, the size of which changes with temperature. In one embodiment, the perfusion control valve comprises a reed valve having at least one reed, e.g., a pair of opposing reeds, or even four reeds. The reeds are configured change shape in order to control the size of the port. For example, each reed can comprise a bimetallic flange or a nitinol flange that bends in the presence of a temperature change.Ablation probes and systems are provided for treating tissue, e.g., tissue having a tumor. The ablation comprises an elongated shaft, an ablative element, a perfusion lumen that extends through the probe shaft, and at least one perfusion exit port in fluid communication with the perfusion lumen. The perfusion lumen can be used to deliver an infusaid to the perfusion exit port(s) for perfusion of the surrounding tissue. The ablation probe further comprises a wicking material, e.g., cotton or fabric, disposed in the perfusion lumen. In this manner, the infusaid that travels through the perfusion lumen can be controlled without regard to the size of the perfusion exit port(s).An ablation probe is provided for treating tissue, e.g., tissue having a tumor. The ablation probe comprises an elongated shaft, an ablative element, a perfusion lumen that extends through the probe shaft, and at least one perfusion exit port in fluid communication with the perfusion lumen. The ablation probe further comprises a pump assembly carried by the proximal end of the shaft. The pump assembly is configured for pumping infusaid through the perfusion lumen and out the perfusion exit port(s). In one embodiment, the pump assembly comprises a reservoir for storing the infusaid, and a perfusion inlet port configured for transferring infusaid from an external source into the reservoir. The pump assembly can be variously configured. For example, the pump assembly may comprise a diaphragm adjacent the reservoir. In this case, the diaphragm has pumping stroke that displaces the infusaid from the reservoir into the perfusion lumen. As another example, the pump assembly comprises a diaphragm adjacent the reservoir, wherein the diaphragm is configured for expanding to pressurize the reservoir in response to the conveyance of infusaid into the reservoir. As still another example, the pump assembly comprises a plunger disposed in the reservoir and a spring configured to urge the plunger within the reservoir in one direction to pressurize the reservoir.
摘要:
A system, ablation probe, and method is provided for treating tissue, e.g., tissue having tumors. The treatment system is configured to automatically deliver infusaid to tissue when needed and comprises an ablation probe having an ablative element and at least one perfusion exit port. The system further comprises an ablation source operably coupled to the ablative element, and a pump assembly operably coupled to the perfusion exit port(s). The pump assembly is configured for pumping infusaid out through the perfusion exit port(s), preferably during the ablation process. The system further comprises a feedback device configured for controlling the amount of infusaid displaced by the pump assembly based on a sensed tissue parameter, e.g., tissue temperature or tissue impedance.