摘要:
A subcutaneous drug delivery device having a housing having an internal reservoir in communication with a drug delivery needle via a fluid path. An expandable chamber disposed adjacent to the reservoir forces drug from the reservoir to the needle when supplied with a gas. A flow regulating chamber, in communication with the fluid path, is capable of volumetric changes in response to temperature and/or pressure changes. An increase in the volume of the flow regulating chamber increases flow resistance to the needle and thereby counteracts the corresponding increase in delivery rate resulting from the expansion of the expandable chamber due to the same volumetric changes in response to temperature and/or pressure. The device also includes an improved filling system that enables the reservoir within the device to be filled with drug from a source without regard to filling position and with a decreased risk of injury from needles. Moreover, the filling system provides an accurate measure of drug transferred into the device thus enabling patients to fill the devices and to ensure proper dosage upon delivery.
摘要:
An improved electrode and iontophoretic device and method where the electrode exhibits varied resistance. The electrode is made of a conductive material and applied to a flexible substrate. The variation in resistance can be achieved by varying the thickness of the electrode across its length or by varying the conductivity of the material across the area of the electrode or a combination of both. A pair of such electrodes may be used with a power source in electrical relation thereto and applied over a layer of agent to the skin to deliver the agent into the skin iontophoretically. The pair of electrodes may be shaped so as to cover a portion of the face, hands, feet or other body parts to iontophoretically apply particular agents to those areas.
摘要:
The invention is directed to a device for delivering a pharmaceutically active compound or cosmetic substance to a subject comprises a flexible substrate sheet attached to an electronic controller. The controller is provided with a pair of electrical contacts on the underside thereof and is adhered to the sheet by means of a pair of strips of electrically conductive adhesive. The underside of the sheet is printed in two halves with electrically conductive ink to provide a pair of electrodes separated by an insulating barrier. A protuberance extends from each electrode and is folded onto the top of the sheet such that the contacts of the controller are adhered in electrical connection with the protuberances and thus also with the electrodes. The use of an adhesive to connect a controller in electrical communication with the electrodes enables an extremely simple construction of delivery device to be achieved.
摘要:
The present invention provides a device for treatment of a nail condition comprising, at least one active electrode disposed on the nail, at least one counter electrode, at least one power source for providing power to the device, wherein the at least one power source is electrically coupled to the at least one active electrode and the at least one counter electrode; a controllable voltage converter coupled to the at least one power source; and a sensing means coupled to the nail and to the controllable voltage converter, wherein the sensing means is configured to facilitate adjustment of the output voltage of the power source according to the nail resistance to facilitate providing a constant current to the nail with high efficiency. The present invention is also directed to a method of providing a constant current to treat a nail condition.
摘要:
A radio frequency transponder includes at least one battery, which is coupled to provide electrical power for operating the transponder and at least one antenna, which is configured to receive and backscatter RF interrogation radiation from an interrogation device. An integrated circuit is arranged to store a code including information and, powered only with energy provided by the battery, to vary a radiation characteristic of the antenna responsively to the code so as to modulate the information onto the backscattered radiation.
摘要:
An RFID device including: electronic circuitry suitable for an RFID device comprising a radio frequency section; an antenna; a battery which provides the device with power; and at least one quarter wavelength transmission line coupled between the battery and one or both of the electronic circuitry and the antenna.
摘要:
A radio frequency identification (RFID) transponder comprising: an antenna comprising at least two connected dipoles, and having an input port feeding one of the dipoles; a conductive ground plane separated by a predetermined distance from the antenna by a dielectric; and a transponder electrically connected to the input port and operative to produce a response signal when the transponder receives a signal at a given frequency from the antenna.
摘要:
A method of forming an electrochemical cell is disclosed. The method comprises contacting a negative pole layer and a positive pole layer one with the other or with an optional layer interposed therebetween. The pole layers and the optional layer therebetween are selected so as to self-form an interfacial separator layer between the pole layers upon such contacting.
摘要:
The present invention is of an active RFID system configured for SIMPLEX two way communication based on conductive coupling, wherein two way communication is non-simultaneous and can operate on a single frequency comprising at least one capacitive coupling reader, wherein the reader is configured to transmit modulated or unmodulated RF electric signals and to receive and decode data transmitted by the transponder; at least one active capacitive coupling RFID transponder comprising at least one integrated circuit, which is arranged to store a code comprising information and which is configured for capacitive coupled RFID transponder application; at least one antenna configured to receive signal from the at least one reader, and transmit the transponder code comprising information; and at least one power source for providing energy to operate the at least one integrated circuit and transponder transmission; and at least one data processing device for processing the data received from the reader. The fully active transponder includes a carrier frequency control circuit wherein the carrier frequency generator is configured to facilitate correction of frequency error in comparison to the reader transmitter carrier frequency.