scispace - formally typeset
Search or ask a question
Patent

Detection and measurement device having a small flexible fiber transmission line

26 Aug 1963-
About: The article was published on 1963-08-26. It has received 81 citations till now. The article focuses on the topics: Transmission line.
Citations
More filters
Patent
28 Jan 2008
TL;DR: In this article, the impedance data related to implantable restriction devices is collected and analyzed for tissue proximate to the restriction device, e.g., a fat pad between a gastric band and the patient's stomach.
Abstract: Methods and devices are provided for gathering impedance data related to implantable restriction devices. In general, the methods and devices can enable patients, health care providers, and others to use gathered data as a feedback mechanism to non-invasively monitor efficacy of an implantable restriction device in a patient and to identify, modify, and/or prescribe a treatment plan for the patient considering the gathered data. Impedance data can be gathered and analyzed for tissue proximate to the restriction device, e.g., a fat pad between a gastric band and the patient's stomach. Electrodes in contact with the tissue can measure an impedance of the tissue, with the impedance between the electrodes changing as the tissue reduces in size (e.g., as fat cells shrink) and/or changes configuration.

275 citations

Patent
06 Apr 2006
TL;DR: In this paper, an implantable restriction device is configured to provide a restriction in a patient as a function of the pressure of fluid, and the restriction device includes one or more pressure sensors configured to sense pressure of the fluid within the implanted restriction device.
Abstract: An implantable restriction device is configured to provide a restriction in a patient as a function of the pressure of fluid. The implantable restriction device includes one or more pressure sensors configured to sense pressure of the fluid within the implantable restriction device. Pressure data obtained by the one or more pressure sensors may be communicated to a device located external to the patient, such as a data logger, using telemetry coils or other communicators. The data logger may store the pressure data, and may communicate the pressure data to a remote location via a network such as the Internet. A docking station may be provided to couple the data logger to a network and/or to recharge a cell in the data logger.

164 citations

Patent
06 Feb 2009
TL;DR: In this article, an implantable system having internal circuitry configured to withstand a pre-determined amount of sterilization radiation is provided, which includes an internal control module in electrical communication with the implantable medical device.
Abstract: An implantable system having internal circuitry configured to withstand a pre-determined amount of sterilization radiation is provided. In general, the system includes an internal control module in electrical communication with an implantable medical device. The internal control module can include a circuit board configured to withstand radiation and/or any number of integrated circuits (e.g., application specific integrated circuits) wherein the circuits or at least some portion thereof are fabricated so as to withstand some amount of radiation. For example, some portion of the circuitry can be fabricated utilizing radiation compliant material(s), silicon-on-insulator technology, and/or gallium arsenide technology. Additionally, the circuitry can include various components which are inherently resistant to such radiation (e.g., components fabricated utilizing magnetic field based technology, surface acoustical wave devices, etc.). A method of sterilizing an implantable medical device via radiation is also provided.

143 citations

Patent
Roger L. Aagard1
13 Oct 1982
TL;DR: In this article, an intravascular catheter tip fiber optic pressure sensor is presented, where a lens element at the end of the fiber optic collimates the light emanating from the fiber and directs the light in a column towards a closely spaced reflecting diaphragm.
Abstract: An intravascular catheter tip fiber optic pressure sensor wherein a lens element at the end of the fiber optic collimates the light emanating from the fiber and directs the light in a column towards a closely spaced reflecting diaphragm. The diaphragm is pressure responsive and modulates the focal length of the lens-diaphragm-mirror combination. Three optic fibers traverse the length of the hollow catheter tube, one carrying transmitted light to the tip, one carrying the reflected light from the diaphragm (i.e. the signal), and the third fiber carrying a reflected reference light. The reference detector provides a signal level to control the level of intensity of the light source.

142 citations

Patent
06 Mar 2007
TL;DR: In this article, a sense head is configured to visually display an indication to a user relating to the positioning and orientation of the sense head relative to the needle target, and the user can insert a needle through the needle window to reach the target.
Abstract: A sense head comprises a plurality of coils and a needle window. The sense head is operable to receive RF signals communicated from a needle target such as an injection port located within a patient. A user interface is configured to visually display an indication to a user relating to the positioning and orientation of the sense head relative to the needle target. The positioning and orientation may be determined based on RF signals received by the coils in the sense head. With the sense head positioned based on information provided through the visual display, the user may insert a needle through the needle window to reach the needle target. The sense head may also receive communications relating to the pressure of fluid in an implanted device. The user interface may further display information relating to the fluid pressure in the implanted device.

136 citations

References
More filters
Patent
23 Jun 1958

58 citations

Patent
31 Jul 1944
TL;DR: In this paper, the photoelastic response of transparent materials to stress is substantially instantaneous and very nearly linear, and this response involves only the displacements of the materials' displacements.
Abstract: The invention relates to improvements in optical testing instruments and more particularly to a photoelastic blast pressure gauge. The photoelastic response of transparent materials to stress is substantially instantaneous and very nearly linear. This response involves only the displacements...

13 citations