摘要:
The invention generally relates to heart pump systems. In some embodiments, a pressure sensor is provided with a heart pump, either at the inflow or the outflow of the blood pump. The heart pump may further include a flow estimator based on a rotor drive current signal delivered to the rotor. Based on the rotor drive current signal, a differential pressure across the pump may be calculated. The differential pressure in combination with the pressure measurements from the pressure sensor may be used to calculate pressure on the opposite side of the pump from the pressure sensor. In some embodiments, the pressure sensor is located at the outflow of the pump and the pump is coupled with the left ventricle. The differential pressure and pressure measurement may be used to calculate a left ventricular pressure waveform of the patient. With such a measurement, other physiological parameters may be derived.
摘要:
The present invention provides an energized ophthalmic device (150) with an active agent release system (105) and an associated method. The active agent release system can be suitable to dispense an active agent including, for example, a vitamin, lubricant, a saline, a solvent, and/or medicament, at one or more predetermined times, through the use of an energization element (100) contained in the ophthalmic device. The energization element may be a battery and/or an energy receptor antenna. The release of the active agent can be according to a signal received wirelessly, a predetermined time, and/or a sensed condition, which can cause an activation element to conduct a current to at least a portion of a metal cap under stress causing it to fold and thereby expose the active agent to a surrounding environment.
摘要:
A vascular access device with a catheter (5) characterized by a sensor and/or a functional element (6, 7) configured to receive or send a wireless radio signal.
摘要:
A vascular access device with a catheter (5) characterized by a sensor and/or a functional element (6, 7) configured to receive or send a wireless radio signal.
摘要:
A centrifugal pump system having an impeller rotating with first and second magnetic structures on opposite surfaces. A levitation magnetic structure is disposed at a ftrst end of a pump housing having a levitating magnetic field for axially attracting the first magnetic structure. A multiphase magnetic stator at a second end of the pump housing generates a rotating magnetic field for axially and rotationally attracting the second magnetic structure. A commutator circuit provides a plurality of phase voltages to the stator. A sensing circuit determines respective phase currents. A controller calculates successive commanded values for the phase voltages in response to the determined phase currents and a variable commutation angle. The angle is selected to correspond to an axial attractive force of the stator that maintains a levitation of the impeller at a centered position within the pumping chamber.
摘要:
A therapy system includes a therapy module implantable within a mammalian body that provides a given therapy and a control module implantable within the mammalian body that effects the therapy provided by the therapy module. The control module is physically separate from the therapy module.
摘要:
A system can coordinate operation of a cardiac function management (CFM) device and a renal device, such as during a vulnerable period in which a patient has an increased risk of tachyarrhythmia.
摘要:
Methods and apparatus for controlling the operation of, and providing power for and to, implantable ventricular assist devices which includes a pump employing a brushless DC motor-driven blood pump, are disclosed. In one embodiment, a control system for driving an implantable blood pump is provided. The digital processor is responsive to data associated with the operation of the pump received at the data transfer pump, and from program data stored in the memory, (i) to determine therefrom, the identity of the pump, (ii) to determine therefrom, electrical characteristics and features of the identified pump, and (iii) to adaptively generate and apply to the data port, control signals for driving the identified pump.
摘要:
A system for the controlled administration of a substance by means of an infusion device implanted in the human body comprising an implantable unit (200) for detecting a shortage or an excess of such substance or a physiological parameter correlatable to the shortage or excess of such substance, an infusion group of this substance (100) implantable in the peritoneal cavity and comprising a central control unit (105) for processing data received from the detection unit (200) in order to generate command signals for the release of the substance in the intraperitoneal cavity, energy storage means (106) to power said infusion group (100). The system also comprises a carrier of said substance (500) adapted to be ingested in order to passively reach the duodenal lumen, made of perforable material resistant to gastric acids and with parts in magnetizable metal, and a refilling device (103) for refilling the infusion group (100) with said substance, comprising a magnetic reversible docking group (113) for said carrier (500), facing the duodenal lumen and actuable when said carrier reaches a predetermined distance therefrom, and means (120) for drawing the substance from said carrier communicating with suction means (110) of said infusion group (100).
摘要:
A penis erection stimulation system comprises a fully implantable drug delivery device for delivering a drug in relation to a penis to achieve erection of the penis. The drug delivery device may comprise a catheter adapted to be implanted in the corpora cavernosa of a penis or in close proximity thereto in order to deliver drugs through said catheter. Alternatively, one or more infusion needles may be disposed within and implanted along with one or more housings adjacent the patient's left and right corpora cavernosa. A reservoir and a pump may also be implanted inside the patient's body to supply the infusion needle with infusion liquid. A drive unit also adapted for implantation inside the patient's body is arranged for advancing and retracting the tip end of the infusion needle such that it penetrates the housing at least in two different penetration areas either simultaneously or in immediate time succession, thereby injecting drugs along with the infusion liquid into the patient's body for stimulating penis erection.