摘要:
Methods are provide for fabricating a microchip device having containment reservoirs. In one embodiment, the method includes providing a substrate; forming a plurality of reservoirs in the substrate, each reservoir having an opening in a surface of the substrate; fabricating a plurality of metal reservoir caps, each of which closes off one of said openings; and sealing each of said reservoirs. The method may further include loading chemical molecules, such a drug, into each of said reservoirs before said sealing of the reservoirs.
摘要:
An implantable device for the controlled release of drug or diagnostic molecules in vivo which includes a substrate formed of a metal or a polyethylene, a plurality of discrete reservoirs provided in spaced positions in the substrate, and a release system disposed in the at least two reservoirs, wherein the release system comprises drug or diagnostic molecules combined with a release-controlling polymer matrix, wherein the kinetics of release of the drug or diagnostic molecules is controlled by disintegration of the polymeric matrix. The substrate and reservoirs therein may be made by a manufacturing technique which comprises compression molding, thermoforming, casting, laser cutting, etching, or a combination thereof.
摘要:
A method is provided for operating a device for the containment and controlled release or exposure of a chemical substance. The method includes (i) providing a device which includes a substrate having a plurality of reservoirs, at least one chemical substance stored in the reservoirs, a plurality of metal reservoir caps, each of which closes an opening of one of said reservoir caps, and power and electrode means for disintegrating each of said reservoir caps; and (ii) disintegrating at least one of said reservoir caps, using said power and electrode means, to expose or release the chemical substance, wherein said disintegration comprises using potentiostatic or galvanostatic control to a voltage potential at said at least one reservoir cap.
摘要:
Methods are provided for medical treatment or diagnosis of a patient. The method includes implanting into the patient a device which comprises (i) a substrate in which at least one reservoir is located and covered by a first reservoir cap, (ii) a drug or sensor located in the reservoir, and (iii) control circuitry and a power source for disintegrating or permeabilizing the reservoir cap, and (iv) an external interface to receive incident light energy; and directing focused light to the external interface of the implanted device to actuate disintegration or permeabilization of the reservoir cap to release the drug or expose the sensor. The device may implanted onto or into the sclera or other tissue surface of the eye of the patient. The focused light may be laser light which may be used to transmit power or data to the device.
摘要:
Reservoir-based medical devices are provided. In one embodiment, the medical device comprises a substrate; at least two discrete, microfabricated reservoirs provided in spaced positions across at least one surface of the substrate; discrete reservoir caps covering the at least two reservoirs; and control circuitry for selectively disintegrating the reservoir caps to open the reservoirs. The reservoirs of the device can include a diagnostic reagent or other molecules useful in medical diagnostics. In one embodiment, the reservoir cap comprises an anode and the control circuitry comprises a cathode and a power source for creating an electric potential between the cathode and the anode. Application of the electric potential causes the reservoir cap to disintegrate, thereby opening the reservoir.
摘要:
Implantable prosthetic devices are provided for controlled drug delivery, for orthopedic and dental applications. The device may include a prosthetic device body having at least one outer surface area; two or more discrete reservoirs located in spaced apart positions across at least a portion of the outer surface area, the reservoirs formed with an opening at the surface of the device body and extending into the device body; and a release system disposed in the reservoirs which comprises at least one therapeutic or prophylactic agent, wherein following implantation into a patient the therapeutic or prophylactic agent is released in a controlled manner from the reservoirs. The prosthetic device body preferably is a joint prosthesis or part thereof, such as a hip prosthesis, a knee prosthesis, a vertebral or spinal disc prosthesis, or part thereof. Optional reservoir caps may further control release kinetics.
摘要:
A pump patch device is provided for drug delivery. The device may include a substrate having a plurality of discrete reservoirs, each reservoir having a reservoir opening; a drug disposed in the reservoirs; a pump for delivering a carrier fluid through or adjacent to the reservoir openings; a flow channel for receiving and combining the carrier fluid from the pump with the drug from the reservoirs to form a fluidized drug; and a needle for delivering the fluidized drug into the skin or another biological tissue of a patient. A device is provided for use in dialysis that includes a non-disposable module including a pump or pressure generator; and a disposable cassette operably connected to the pump or pressure generator and including a plurality of discrete reservoirs containing drug and sensors. A fluidics connection device is provided that includes a compression cold weld seal for a microfluidic via.
摘要:
A drug delivery device for implantation into a patient is provided that includes at least one device element which comprises a substrate having a plurality of discrete reservoirs disposed therein, said reservoirs containing drug molecules and a degradable matrix material which controls in vivo release of the drug molecules from the reservoirs, wherein the drug delivery device is adapted to conform to a curved bone tissue surface. In one embodiment, the substrate is flexible and conforms to a bone tissue surface. In another embodiment, the device has two or more device elements attached to or integral with a flexible supporting layer.
摘要:
A method is provided for non-invasively detecting mechanical wear of a prosthetic device implanted in a patient, the method comprises using a non-invasive imaging technique to image the prosthetic device that includes a wear indicating composition; and detecting whether the wear indicating composition has been released from the prosthetic device, and, if so, the location, type, and/or amount thereof. The implant device includes a prosthetic device body having at least one outer surface area; at least one reservoir (e.g., a plurality of discretely spaced micro-reservoirs) in the device body; a wear indicator composition disposed in said at least one reservoir, wherein mechanical wear of the at least one outer surface area of the device body in vivo causes release of at least part of the wear indicator composition. The prosthetic device body may be one for replacement of a hip, a knee, a shoulder, an elbow, or a vertebra.
摘要:
Device are provided for the controlled release or exposure of molecules or secondary devices comprising a substrate; a plurality of reservoirs located in the substrate; reservoir contents comprising molecules, a secondary device, or both, isolated inside the reservoirs; reservoir caps positioned on the reservoirs over the reservoir contents, wherein the reservoir caps (which can comprise a metal film) are mechanically reinforced with a second material deposited and patterned on the surface of the metal film inside the reservoir or on the surface of the metal film outside the reservoir or on both of said surfaces; and control circuitry and a power source for disintegrating the reservoir caps to initiate exposure or release of the reservoir contents in selected reservoirs.