摘要:
A portable wound treatment system that includes a treatment device and a portable generator that may be used for debridement of target tissue to remove devitalized tissue, manage bacterial biofilm, control the bacterial load, and facilitate wound closure and healing. The treatment device includes a handle, an interior cavity for receiving a conductive fluid, such as a saline solution, a conductive element disposed within the interior cavity, and a plurality of apertures configured to allow passage of the conductive fluid from the interior cavity. The portable generator generates and transmits energy to the conductive element, which is then carried by the conductive fluid passing through one or more of the apertures for coagulation and/or ablation of a target tissue.
摘要:
An endoluminal graft is wrapped axially upon itself to form a low profile, which facilitates endoluminal delivery. Apparatus and systems for making and using such grafts are also disclosed.
摘要:
An invasive medical device for delivery radio frequency energy to a target tissue region includes an elongate delivery cannula having a lumen in communication with a distal opening. A deployment member is positioned and longitudinally movable in the lumen. An array of electrode elements are secured to a distal end of the deployment member, the deployment member being movable from a delivery position, in which the electrode elements are positioned within the lumen, to a deployed position, in which the electrode elements extend distally out of the cannula distal opening. A sealing member formed from a biocompatible material sufficiently rigid to penetrate solid body tissue partially extends from, and substantially seals, the distal cannula opening when the deployment member is in the delivery position. By way of examples, the sealing member may be carried on a distal end of the deployment member, or on a separately movable deployment member, or frictionally fit in the cannula distal opening.
摘要:
A stent for assisting urinary release in a male patient includes a first segment, a second segment, and a connecting member disposed between the first and second segments. The first segment includes a multi-winged malecot. When the stent is properly positioned within the patient's urinary system, the first segment is located on one side of the external sphincter with the multi-winged malecot located within the bladder to inhibit migration of the stent, and the second segment is located on the other side of the external sphincter and also tends to inhibit migration of the stent. The connecting segment is sized to extend through the external sphincter to couple the first and second segments together while not interfering with the normal operation of the external sphincter.
摘要:
A medical assembly and method are provided to effectively treat abnormal tissue, such as, a tumor. The target tissue is thermally ablated using a suitable source, such as RF or laser energy. A cooling shield is placed in contact with non-target tissue adjacent the target tissue, and actively cooled to conduct thermal energy away from the non-target tissue. In one method, the cooling shield can be placed between two organs, in which case, one of the two organs can comprise the target tissue, and the other of the two organs can comprise the non-target tissue. In this case, the cooling shield may comprise an actively cooled inflatable balloon, which can be disposed between the two organs when deflated, and then inflated. The inflatable balloon can be actively cooled by pumping a cooling medium through it. In another method, the cooling shield can be embedded within the non-target tissue. In this case, the cooling shield can comprise one or more needles. If a plurality of needles is used, they can be embedded into the non-target tissue in a series, e.g., a rectilinear or curvilinear arrangement. The needle(s) can be actively cooled by pumping a cooling medium through them.
摘要:
A system and method for treating a target tissue region (e.g., malignant tissue) is provided. A hyperthermic probe is placed into contact with the target tissue region, and the target tissue region is exposed to a therapeutic x-ray radiation beam. The probe is operated to increase the temperature of the target tissue region, thereby facilitating a therapeutic effect of the radiation beam. Image data of the probe containing a fiducial datum is acquired while in contact with the target tissue region, a position of the target tissue region within a treatment coordinate system is determined based on the fiducial datum, and the radiation beam is spatially adjusted relative to the target tissue region based on the determined position of the target tissue region.
摘要:
Methods and devices for occluding a vessel during a percutaneous ablation procedure. An elongated access device having a lumen and a tissue piercing, open distal end in communication with the lumen is used to percutaneously access a vessel that supplied blood to the tissue to be treated. An elongated balloon deployment device is used to deliver a balloon into the interior of the vessel. The balloon is inflated, resulting in the occlusion of the vessel. The tissue to be treated is ablated. Because there is little or no blood to transfer the thermal energy away from the heated tissue, the ablation procedure is performed more efficiently. The balloon may be subsequently deflated allowing normal flow through the vessel to return.
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:
A device for providing access to an implantable fluid transfer port, comprises a needle extending to a distal end insertable into body to enter a reservoir of a port implanted therein and an actuation member extending through a lumen of the needle from an actuator which remains external to a living body accessible to a user thereof in combination with an obturator coupled to a distal end of the actuation member, an outer diameter of the obturator substantially matching an inner diameter of the lumen of the needle so that, when retracted into the lumen, the obturator seals a distal opening thereof and an anchoring mechanism coupled to the actuation member proximally of the obturator, the anchoring mechanism being moved to an expanded state in which an outer diameter of the anchoring mechanism exceeds an outer diameter of the needle when moved out of the lumen of the needle.
摘要:
A combination tissue coagulation and cutting apparatus, system and method for coagulating and cutting tissue. A clamp element includes first and second clamp members having respective first and second porous electrodes, such as sintered metal electrodes. A portion of tissue, such as a blood vessel, is held between the porous electrodes, and fluid from a fluid source can pass through the porous electrodes. The tissue portion can be coagulated when electrical current is applied to the first and second porous electrodes, and an adjustable cutting element that is associated with the clamp members is positioned to cut a segment or all of the coagulated tissue portion. In this manner, the same surgical instrument is used to coagulate and cut tissue.