摘要:
A long term bi-directional axon-electronic communication system that provides signaling capability at the level of individual nerve fascicles, bundles of axon and even axons is disclosed. The bi-directional communication system is a modular approach for achieving a chronic enduring interface to peripheral or central nerve atoms for the purpose of restoring function to disabled persons or animals with sensory and/or motor impairments. One embodiment of the communication system includes a multi-channeled nerve-muscle graft chamber for making the nerve-muscle connection. Another embodiment includes a regeneration based microtube nerve interface for bi-directional communication. The interface communication system permits amputees to obtain simultaneous control of multi-degree of freedom powered prostheses by means of naturally produced neural activity from the stamps of the amputated nerves in their residual limbs.
摘要:
An apparatus and corresponding method for providing data communications to and from a location within a body cavity in which an internal transmitter receives a first data stream from an in vivo sensor, electrode, or transducer. The internal transmitter is configured and arranged to asynchronously modulate the first data stream and to provide as an output a first optical signal carrying the asynchronously modulated first data stream. The apparatus further includes an external receiver that is configured and arranged external to the body cavity such that an optical input to the external receiver is optically coupled to the internal transmitter output and receives the optical signal therefrom. The external receiver asynchronously demodulates the received optical signal and provides as an output at least one signal indicative of the first data stream.
摘要:
A probe adapted for insertion in living tissue for measuring oxygen partial pressure and temperature at a plurality of sites in living tissue is provided. A temperature sensitive resistor is positioned adjacent each of a plurality of oxygen sensors so that the oxygen partial pressure measured can be adjusted for tissue temperature. The probe substrate has thermal properties similar to living tissue and the resistors are formed of a material having a temperature sensitive resistance. Temperature at each temperature sensitive resistor is obtained by measuring resistance with a four point measurement and correlating the resistance to temperature.
摘要:
A method of encapsulating a lead bonding pad region of an integrated circuit (such as a sensor used in an implantable medical device) is disclosed. The excapsulant (such as Teflon.TM.-TFE) is mechanically gripped on the surface of the circuit by anchor interlock portions which are held in undercut grooves, micromachined, in a predefined pattern, in the circuit substrate. The encapsulant is held down by the portions in the grooves, forms a tight mechanical seal with the substrate surface and with the insulation around an attached lead, and blocks intrusion of contaminants along the surfaces between these materials or through the encapsulant.
摘要:
Flexible measurement probes are described for the determination of oxygen partial pressure; temperature and perfusion; and combined measurement of oxygen partial pressure, temperature, and perfusion. The probes are fabricated by patterning a metal coated substrate to form a conductive pattern of ribbon leads, insulating the conductive ribbon leads except for contact openings, and then attaching sensors to the conductive ribbon leads through noble metal plated open contacts. The plated contacts may be used directly to measure oxygen partial pressure.
摘要:
Oxygen partial pressure and temperature are measured in living tissue by inserting a thin probe into living tissue. The probe includes a plurality of spatially separated thermal sensors secured to the probe substrate. A plurality of oxygen sensors is positioned along the length of the probe substrate and each oxygen sensor is associated with and positioned adjacent to or is an integral part of one of the thermal sensors. Electrical parameters of the sensors located on the probe are measured and used to determine oxygen partial pressure and to determine temperature at each of a plurality of sites along the probe.