摘要:
A pressure activated valve for medical applications comprises a housing having a lumen extending therethrough from a proximal end to a distal end thereof and a flow control membrane extending across the lumen to control flow therethrough, the flow control membrane including a mounting portion at which the flow control membrane is coupled to the housing and a lumen occluding portion having a slit extending therethrough so that, when the lumen occluding portion is subjected to a pressure of at least a predetermined threshold level, the lumen occluding portion moves from a closed configuration in which flow through the lumen is prevented to an open configuration in which flow is permitted and wherein a thickness of the mounting portion is greater than a thickness of the lumen occluding portion.
摘要:
A medical probe kit and method of treating abnormal tissue within a patient is provided. The kit comprises a cannula having a shaft, a lumen extending through the cannula shaft, and a first ablation electrode disposed on the distal end of the cannula shaft. The cannula may have a handle mounted to the proximal end of the cannula shaft, and an optional fluid delivery port on the handle in fluid communication with the cannula lumen. The kit further comprises an ablation probe configured to be removably disposed within the delivery cannula lumen. The ablation probe has a shaft and a second ablation electrode disposed on a distal end of the probe shaft, wherein the first and second ablation electrodes are arranged in a bipolar configuration. Preferably, the ablation probe is slidable relative to the delivery cannula, whereby the distance between the first and second ablation electrodes can be adjusted. Thus, the delivery cannula can be used to interchangeably deliver the ablation probe and other medical elements, such as a biopsy needle, obturator, and chemotherapeutic agent.
摘要:
Apparatus for manipulating the uterus and/or cervix of a patient, the apparatus comprising:an elongated shaft having a proximal end and a distal end;an annular rim connected to the distal end of the elongated shaft; anda projection extending distally from the annular rim, the projection being coaxial with the annular rimand having a helical thread on its outer surface.
摘要:
The present invention relates to a medical prosthesis having a low profile for delivery into a body lumen. The stent includes a plurality of geometric cells defining the stent, which has first and second opposed open ends; and a plurality of wire strands woven to form a plurality of crossed regions defining the geometric cells. Each wire strand has strand ends and the strand ends are disposed at the second end of the stent.
摘要:
Assemblies and methods are provided for resecting a portion of tissue to be removed (e.g., unhealthy tissue, such as cancerous tissue) from a portion of the tissue to be retained (e.g., healthy tissue) within a patient is provided. An electrically conductive fluid, such as saline, may be absorbed into a hydrophilic electrode. Electrical energy (e.g., radio frequency (RF) energy) is conveyed to or from the hydrophilic electrode while being moved in proximity to the tissue along a resection line, whereby tissue adjacent to the resection line is coagulated. A resection member, such as a blunt resection member or a resection electrode, which may be on the same device as the hydrophilic electrode, is used to separate the tissue along the resection line to resect the tissue portion to be removed from the tissue portion to be retained.
摘要:
Assemblies and methods are provided for resecting a portion of tissue to be removed (e.g., unhealthy tissue, such as cancerous tissue) from a portion of the tissue to be retained (e.g., healthy tissue) within a patient is provided. An electrically conductive fluid, such as saline, may be absorbed into a hydrophilic electrode. Electrical energy (e.g., radio frequency (RF) energy) is conveyed to or from the hydrophilic electrode while being moved in proximity to the tissue along a resection line, whereby tissue adjacent to the resection line is coagulated. A resection member, such as a blunt resection member or a resection electrode, which may be on the same device as the hydrophilic electrode, is used to separate the tissue along the resection line to resect the tissue portion to be removed from the tissue portion to be retained.
摘要:
A tissue ablation system comprises an ablation source, such as an RF ablation source, configured for generating a common power signal, and a power multiplexor configured for splitting the power signal into first and second power signals, substantially attenuating the second power signal relative to the first power signal to create nominal and attenuated power signals, and sequentially delivering the nominal power signal to each tissue ablation probe, while delivering the attenuated power signal to the remaining ablation probes to which the nominal power signal is currently not delivered.
摘要:
Described herein are various implantable devices that include a heat generating element for degrading bacterial. In particular, the device can include a catheter having a heat generating element proximate to a distal end of the catheter for heating an outer surface of the catheter.