Abstract:
The present invention is directed to implantable and insertable medical devices (also referred to herein as internal medical devices), which contain one or more peroxide-converting catalysts. According to an aspect of the invention, internal medical devices are provided, which contain (a) a substrate and (b) a peptide-containing, peroxide-converting catalyst disposed over at least a portion of the substrate. According to another aspect of the invention, internal medical devices are provided which contain a catalyst binding entity. The catalyst binding entity is adapted to bind to endogenous peroxide-converting catalyst upon implantation or insertion of the devices into patients. In another aspect of the invention, internal medical devices are provided which contain a biodegradable region that in turn contains a peroxide-converting catalyst. These devices release the catalyst in conjunction with degradation of the biodegradable region. In yet another aspect of the invention, internal medical devices are provided which contain a substrate, a multilayer region disposed over at least a portion of the substrate, and a peroxide-converting catalyst disposed within the multilayer region. The multilayer region, in turn, contains a plurality of charged layers of alternating charge, which charged layers further contain a plurality of polyelectrolyte containing layers.
Abstract:
An apparatus, system and method of a resonator device with an adjustable capacitor for allowing the resonance frequency (F) of the resonator device to continue to be matched to the Larmor frequency of the MRI system. The resonator device includes an inductor coil, a conductive member, a sleeve having first and second sockets that receive at least portions of the inductor coil and the conductive member as electrodes to provide a capacitor structure. Dielectric material can be positioned between at least the first and second sockets, where changes in the cross sectional area defined by the induction coil cause changes in the capacitance value (C) as one or more of the electrodes move within the socket. Changes in the inductance and the capacitance values allow for the resonance frequency (F) of the resonator device to continue to be matched to the Larmor frequency of the MRI system.
Abstract:
According to an aspect of the present invention, implantable or insertable medical devices (also referred to as internal medical devices) are provided. These medical devices include at least one machined layer, at least a portion of which is disposed over at least one underlying region (e.g., a therapeutic agent containing region, a catalytic region, etc.). The at least one machined layer contains a plurality of excavated regions which promote the transport of molecular species across the machined layer. An advantage of the present invention is that medical devices are provided, in which the transport of species into the medical device, out of the medical device, or both are controlled, and may be customized, as desired.
Abstract:
A stent is adapted to be implanted into the lumen of a vessel. The stent includes struts and a resonating circuit tuned to the resonating frequency of a magnetic resonance imaging system. The resonant circuit is constructed of at least one inductor and at least one capacitor. The inductor is wound about at least one of the struts.
Abstract:
A device resonator for medical device is provided. The resonator device includes a helical structure and a capacitor structure. The resonator device can be used in conjunction with a medical device, including a stent.
Abstract:
A medical device having a catheter shaft having a distal portion and a proximal portion, a medical balloon co-axially mounted on the distal portion of the catheter shaft and a tubular mesh wrapped around the balloon, wherein the mesh strengthens and reinforced the balloon and may be manipulation to dictate the shape of the balloon and to squeeze the balloon down onto the catheter shaft during deflation of the balloon.
Abstract:
Medical devices, for example, those that have balloons, and methods of making the devices are described. In some embodiments, a method includes providing a medical balloon having a first cone portion and a body portion, and removing material from an outer surface the body portion of the balloon such that the balloon includes a first region and a second region, the first region being recessed relative to the second region.
Abstract:
A resonator device for medical device is provided. The resonator device includes a helical structure and a capacitor structure. The resonator device can be used in conjunction with a medical device, including a stent.