摘要:
Embodiments provide an apparatus and method for detection of aberrant neural-electric activity (ANEA) in the brain causing an epileptic seizure or other neurologic condition. One embodiment provides an apparatus for detection of ANEA comprising an introducer having at least one lumen. The introducer is introduced into brain tissue through an opening in the skull. A reference electrode is positioned at an introducer distal portion. A plurality of electrode members are advanceable within the at least one lumen with each member having an insulated portion and an exposed distal portion. The members have a non-deployed state in the introducer and a deployed state when outwardly advanced out of the introducer. In the deployed state, the members are substantially orthogonal to each other with the exposed distal portions defining a detection volume capable of determining an electric field vector produced by the ANEA and the direction of a foci of the ANEA.
摘要:
Various embodiments provide methods and systems for the biphasic iontophoretic transdermal delivery of therapeutic agents. An embodiment of a method for such delivery comprises positioning at least one electrode assembly in electrical communication with a patient's skin. The assembly includes a solution comprising a therapeutic agent which passively diffuses into the skin. A dose of agent is delivered from the assembly into the skin during a first period using a first current having a characteristic e.g., polarity and magnitude, to repel the agent out of the assembly. During a second period, a second current having a characteristic to attract the agent is used to retain the agent in the assembly such that delivery of agent into skin is minimized. A dose of agent may be delivered on demand by an input from the patient. Embodiments may be used for delivery of agents which cause adverse effects from unwanted passive diffusion.
摘要:
Various embodiments provide methods and systems for the biphasic iontophoretic transdermal delivery of therapeutic agents. An embodiment of a method for such delivery comprises positioning at least one electrode assembly in electrical communication with a patient's skin. The assembly includes a solution comprising a therapeutic agent which passively diffuses into the skin. A dose of agent is delivered from the assembly into the skin during a first period using a first current having a characteristic e.g., polarity and magnitude, to repel the agent out of the assembly. During a second period, a second current having a characteristic to attract the agent is used to retain the agent in the assembly such that delivery of agent into skin is minimized. A dose of agent may be delivered on demand by an input from the patient. Embodiments may be used for delivery of agents which cause adverse effects from unwanted passive diffusion.
摘要:
Embodiments of the invention provide compositions include bio degradable polymers, medical implants fabricated from these compositions and methods of using such implants. Many embodiments provide medical implants including a first polymer backbone having a first rate of biodegradation and a second polymer backbone having a second rate of biodegradation faster than the first rate. In some embodiments, the second backbone is configured to be replaced by a natural tissue layer. The first backbone provides a scaffold for the implant while the second backbone degrades. This scaffold can enhance mechanical properties of the implant including various aspects of mechanical strength such as tensile, bending, hoop and yield strength; and elasticity. The scaffold also serves to maintain a minimum level of structural support of the implant during the period of degradation of the second backbone or for the entire life of the implant so that the implant does not mechanically fail.
摘要:
An embodiment of the invention provides an apparatus for the detection and treatment of atrial arrhythmia comprising an electrical lead having proximal and distal portions. The distal portion is positionable in an atrial chamber and the end of the proximal portion is configured to be coupled to a pacemaker. The lead comprises a plurality of conductive wires clad with an insulative coating and has sufficient flexibility to be positioned in the atria from a percutaneous introductory site. The conductive wires are coupled to a plurality of pairs of bipolar electrodes positioned on a membrane attachable to an endocardial wall. The electrode pairs are distributed in a pattern defining an area for detecting a location of a foci of aberrant electrical activity located within or adjacent the area and sending a pacing signal to that location to prevent or stop an occurrence of atrial fibrillation caused by that foci.
摘要:
Embodiments described herein provide lid structures for medical implant (MI) housing. In one embodiment, the invention provides a lid structure for a MI housing comprising a substrate comprising a dielectric material, a conductive portion fabricated on a substrate surface or interior, a frame at least partially surrounding the substrate perimeter, a plurality of vias projecting at least partially through the substrate, a plurality of conductive pins with at least one pin projecting through a via. The frame is hermetically joined to the substrate and can be hermetically joined to the housing. The conductive portion allows electrical components, including capacitors, inductors, resistor and antennas to be fabricated on or coupled to the substrate surface or interior. The antenna comprises a conductive trace positioned on a substrate top surface and is configured to send and receive signals between an implant within a patient's body and a communication device external to the body.
摘要:
Embodiments of the invention provide patches for the transdermal delivery of compositions to treat an individual suffering from hair loss. Many embodiments provide an iontophoretic patch for the transdermal delivery hair growth stimulating agents for the treatment of hair loss by stimulating the growth of new hair in areas of the scalp exhibiting hair loss. The patch comprises an electrode and a reservoir containing a composition comprising iron containing compound, such as a chelated iron compound for the delivery of the therapeutically effective amount of iron. The patch can be shaped to be placed and remain on the head. Various embodiments provide methods of using embodiments of the iontophoretic patch for delivering a hair growth stimulating agent such as a chelated iron compound, minoxidil and finasteride to the scalp and other areas exhibiting hair loss. Such methods can be used for re-growing hair, and/or preventing or slowing hair loss.
摘要:
Embodiments of the invention provide compositions comprising bio degradable polymers, medical implants fabricated from these compositions and methods of using such implants. Many embodiments provide medical implants comprising a first polymer backbone having a first rate of biodegradation and a second polymer backbone having a second rate of biodegradation faster than the first rate. In some embodiments, the second backbone is configured to be replaced by a natural tissue layer. The first backbone provides a scaffold for the implant while the second backbone degrades. This scaffold can enhance mechanical properties of the implant including various aspects of mechanical strength such as tensile, bending, hoop and yield strength; and elasticity. The scaffold also serves to maintain a minimum level of structural support of the implant during the period of degradation of the second backbone or for the entire life of the implant so that the implant does not mechanically fail.
摘要:
Disclosed is a method of treating a disease or condition (e.g., pain, diabetes or disorders of lipid metabolism) comprising administering an azetidine derivative of the formula I selected from the group consisting of the compounds defined by Tables 1, 2, 3a, 3b, 3c, 3d and 4a.
摘要:
Compounds having the structural formula I or a pharmaceutically acceptable salt thereof, wherein R is R1-isoxazolyl, R1-oxadiazolyl, R1-dihydrofuranyl, R1-pyrazolyl, R1-imidazolyl, R1-pyrazinyl or R1-pyrimidinyl; R1 is 1, 2 or 3 substituents selected from H, alkyl, alkoxy and halo; Z is optionally substituted-aryl, or optionally substituted-heteroaryl; are disclosed, as well as their use in the treatment of central nervous system diseases, in particular Parkinson's disease and Extra Pyramidal Syndrome, pharmaceutical compositions comprising them, and combinations with other agents.