摘要:
Methods and systems are provided for delivering drug to the eye. The method and system may include implanting into the eye a device which comprises two or more discrete reservoirs, each reservoir containing a drug; and directing focused light to the implanted device to open a first one of the reservoirs and thereby permit the drug to diffuse from the first reservoir to the patient's eye.
摘要:
The present invention provides systems, devices, and related methods, involving electrochemical actuation. In some cases, application of a voltage or current to a system or device of the invention may generate a volumetric or dimensional change, which may produce mechanical work. For example, at least a portion of the system may be constructed and arranged to be displaced from a first orientation to a second orientation. Systems such as these may be useful in various applications, including pumps (e.g., infusion pumps) and drug delivery devices, for example.
摘要:
Implant devices for intravesical administration and local drug delivery. The device has a body which includes a hollow tube formed of a biocompatible material; at least one reservoir in the tube which contains a drug; and one or more apertures through which the drug can be released. The device is configured for minimally invasive insertion into a body cavity, such as the bladder. The hollow tube may be elastomeric to permit the device to be elastically deformed from its initial shape into an elongated shape for passage through a catheter, where following such passage the device can return to or toward its initial shape to facilitate retention of the device in the body cavity. The body may have a narrow, elongated shape effective to permit insertion of the drug delivery device through a catheter without necessarily deforming the body, yet include flexible projections which effect retention within the body cavity.
摘要:
The present invention includes controlled release dosage forms and methods of designing and manufacturing dosage forms to obtain specific release profiles, for example, zero-order release profiles, escalating release profiles or decreasing release profiles. The dosage forms of the present invention can include spatial variation of API concentration in the dosage form and can include nested regions. Dosage forms according to the present invention may be manufactured by any appropriate method for obtaining the internal structure as disclosed herein for producing zero-order release profiles and increasing or decreasing release profiles. The invention further includes methods of manufacturing such dosage forms, such as by three-dimensional printing, possibly also including compression of the dosage form after three-dimensional printing. The invention further includes methods of designing such dosage forms. Release profiles from non-uniform distributions of API concentration may be predicted based on simple experiments with uniform-concentration dosage forms.
摘要:
Systems and methods are described that allow the high-throughput preparation, processing, and study of arrays of samples, each of which comprises at least one compound. Particular embodiments of the invention allow a large number of experiments to be performed in parallel on samples that comprised of one or more compounds on the milligram or microgram quantities of compounds. Other embodiments of the invention encompass methods and devices for the rapid screening of the results of such experiments, as well as methods and devices for rapidly determining whether or not similarities exist among groups of samples in an array. Particular embodiments of the invention encompass methods and devices for the high-throughput preparation of different forms of compounds (e.g., different crystalline forms), for the discovery of new forms of old compounds, and for the discovery of new methods of producing such forms. Embodiments of the invention also allow for the high-throughput determination of how specific compounds or forms of compounds behave when exposed to other chemicals or environmental conditions.
摘要:
A device for controlling or altering the temperature of a liquid at the point of dispensing. A temperature-altering device is thermally coupled to a dispensing device to compensate for heat dissipated into the liquid as it passes through the dispensing device during dispensing. The dispensing device may be for example, a miniature solenoid valve (microvalve), a piezoelectric printhead, or the like. According to aspects of the invention, a temperature-altering device provides or reduces heat at the point of dispensing in order to alter, control or maintain a constant temperature of the dispensed liquid. As a result, improvement is obtained in the consistency of the fluid regime of the dispensed droplet stream. The temperature-altering device may be a thermoelectric device capable of moving heat either from or to the dispensing structure, or may be a heater. This device may be used beneficially even when the dispensing is performed near room temperature and the liquid does not require heating to maintain its liquid state.
摘要:
Solid free-form (SSF) techniques for making medical devices for implantation and growth of cells from polymers or polymer/inorganic composites using computer aided design are described. Examples of SFF methods include stereo-lithography (SLA), selective laser sintering (SLS), ballistic particle manufacturing (BPM), fusion deposition modeling (FDM), and three dimensional printing (3DP). The devices can incorporate inorganic particles to improve the strength of the walls forming the pores within the matrix and to provide a source of mineral for the regenerating tissue. The devices can contain tissue adhesion peptides, or can be coated with materials which reduce tissue adhesion. The macrostructure and porosity of the device can be manipulated by controlling printing parameters. Most importantly, these features can be designed and tailored using computer assisted design (CAD) for individual patients to optimize therapy.
摘要:
Microchip delivery devices are provided that control both the rate and time of release of molecules, wherein the device includes a substrate, at least one reservoir in the substrate containing the molecules, and a reservoir cap positioned on the reservoir over the molecules, wherein the molecules are released from the reservoir upon heating or cooling the device or a portion thereof sufficient to rupture the reservoir cap. In a preferred embodiment, the device includes a resistor integrated into the reservoir or mounted near the reservoir, which upon application of an electric current through the resistor, causes at least one of the contents of the reservoir to thermally expand, vaporize, phase change, or undergo a thermally driven reaction, such that the reservoir cap ruptures due to mechanical stress. In another preferred embodiment, application of an electric current to a resistor located on or near the reservoir cap causes the cap to expand, contract, or undergo a phase change that results in the rupture of the reservoir cap. The reservoirs can contain multiple drugs or other molecules in variable dosages. Each of the reservoirs of a single microchip can contain different molecules and/or different amounts and concentrations, which can be released independently.
摘要:
Apparati and methods are provided for the delivery of molecules to a site via a carrier fluid. The apparati include microchip devices which have reservoirs containing the molecules for release. The apparati and methods provide for active or passive controlled release of the molecules. Preferred embodiments include systems for intravenous administration of drugs, wherein drug molecules are released from the microchip devices into a carrier fluid ex vivo, such as a saline solution, forming a drug/saline solution mixture which is then delivered to a patient intravenously.
摘要:
Highly-textured superconductor oxide thin films are prepared on substrates, including lattice matched, non-lattice matThe Government has rights in this invention pursuant to contract Number MDA972-88-K0006 awarded by the U.S. Defense Advance Research Project Agency.
摘要翻译:通过金属有机沉积(MOD)在衬底上制备高纹理超导体氧化物薄膜,包括晶格匹配的,非晶格匹配的惰性和非惰性材料。 选择前体溶液组成以及加工温度和气氛以控制瞬态液相的存在。 以高度纹理化的形态和完全致密均匀的微观结构为特征的超导体氧化物膜在77°K时能够保持超过104A / cm 2的临界电流密度,当在非晶格匹配衬底上制备时,其临界电流密度超过106A / cm2,当在晶格匹配的基底上制备时。