摘要:
An ultrasonic core including a longitudinally elongated, generally planar waveguide defining an aperture extending from a first side of the waveguide toward a medial plane of the waveguide, and having a transducer element sized and shaped so as to substantially conform to the size and shape of the aperture and to be at least partially embedded within the waveguide. In other aspects, an ultrasonic core including a longitudinally elongated, generally planar silicon waveguide having at least one transducer element secured thereto and a wedge-shaped acoustic horn including an inclined side surface, characterized in that the inclined side surface is oriented along the {1,1,1} crystallographic plane of the silicon material. Also, methods of manufacturing the respective ultrasonic cores and ultrasonic handpieces for an ultrasonic surgical instruments incorporating such cores.
摘要:
Devices and related methods are provided for the controlled delivery of a therapeutic to a targeted location within a body. More particularly, methods and devices are provided for controlling the rate of passage of an orally administered pill through a body, as well as for controlling the delivery of a therapeutic within the pill at a specific location within the body. Various types of devices, generally referred to herein as “catchers,” are provided that can actively catch a pill as it passes through a body. The catcher can hold the pill at a specific location within the body until a predetermined event occurs, such as partial or complete administration of a therapeutic within the pill. The catcher can then release the pill upon command and/or upon the occurrence of the predetermined event to allow the pill to pass out of the body. In other embodiments, various types of pills are provided that can actively engage a catcher and remain engaged with the catcher until a predetermined event occurs.
摘要:
An implantable system for stimulating the release of satiety hormone in a subject comprises a stimulus device (11) which is implantable in the subject and adapted to apply an electrical stimulus to a tissue of a gastrointestinal system of said subject, and a detection device which is implantable in the subject and adapted to continuously monitoring at least one of a mechanical characteristic and an electrical characteristic of the subject to detect an ingestion of food by said subject, wherein the detection device cooperates with the stimulus device (11) such that the stimulus device (11) applies said electrical stimulus in response to a detected ingestion of food.
摘要:
An implantable system for stimulating the release of satiety hormone in a subject comprises a stimulus device which is implantable in the subject and adapted to apply an electrical stimulus to a tissue of a gastrointestinal system of said subject, and a detection device which is implantable in the subject and adapted to continuously monitoring at least one of a mechanical characteristic and an electrical characteristic of the subject to detect an ingestion of food by said subject, wherein the detection device cooperates with the stimulus device such that the stimulus device applies said electrical stimulus in response to a detected ingestion of food.
摘要:
Implantable medical devices, and methods of coating same, including a plurality of components disposed on a substrate, and a low surface energy layer deposited as a liquid over at least a first portion of the components and the substrate, the low surface energy layer becoming solidified after deposition and conforming to at least the first portion of the components. The devices further include a biocompatible hermetic coating conforming to and sealingly covering at least a portion of the low surface energy layer.
摘要:
An adjustable resistance valve for a cerebrospinal fluid shunt system includes an actuator for allowing the selection of the resistance to flow of the valve, a device for selecting at least one passage traversing across the valve, and a resistance system. The resistance system includes a set of passages each defining a different resistance to flow. The passages are disposed in a circle facing the selecting device such as to guide the flow of the cerebrospinal fluid traversing the passage of the selecting device through the selected passage of the resistance system. The actuator enables one to change the relative position of the selecting device with respect to the resistance system by a rotational movement to select the desired resistance of the valve.
摘要:
A universal external control device for use by multiple conditional access users with varying access to functionality of an implantable medical device in wireless communication therewith. Circuitry associated with the external control device is used to uniquely identify each of the conditional access users via an access device such as a key or card. Access to functionality of the implantable medical device is restricted by the universal external control device based on the conditional access user identified by the access device.
摘要:
A universal external control device for use by multiple conditional access users with varying access to functionality of an implantable medical device in wireless communication therewith. Circuitry associated with the external control device is used to uniquely identify each of the conditional access users via an access device such as a key or card. Access to functionality of the implantable medical device is restricted by the universal external control device based on the conditional access user identified by the access device.
摘要:
An implantable nuclear magnetic resonance spectrometer for measuring the chemical composition of a fluid or for measuring the flow rate of the fluid. The spectrometer includes a housing and a catheter traversing across the housing so that a fluid external to the housing may flow through the catheter within the housing. A permanent magnet is disposed within the housing and generates an intense homogenous magnetic field in the vicinity of the catheter. An electronic circuit is disposed within the housing for detecting and formatting a nuclear magnetic resonance excitation signal. An excitation coil is connected to the electronic circuit and is disposed about the catheter to expose the fluid within the catheter to the excitation signal and to collect the nuclear magnetic resonance excitation signal.
摘要:
A shunt system for implantation into a patient for diverting excess fluid from the lateral ventricles of the patient's brain to a diversion site. The present shunt includes a pressure transducer for measuring ICP, a rate of flow transducer for measuring the flow rate of the CSF flowing within the shunt, and telemetry circuitry. A remote reader with an antenna is provided to selectively interrogate and provide inductive power to the implanted shunt. Upon interrogation, the pressure and rate of flow measurements are calibrated, multiplexed and transmitted on a carrier signal back to the remote reader/antenna. The reader/antenna extracts the pressure and flow rate data from the carrier wave and further separates the data by demultiplexing the signal. The reader further includes a barometer for providing local barometric pressure and uses this information together with the data from the implanted transducers to calculate and display real-time adjusted ICP, CSF flow-rate within the shunt and brain compliance.