Suction Patents (Class 600/387)
  • Patent number: 10376168
    Abstract: The present invention is directed to a physiological recording device and, more particularly, to a physiological recording device that can be used without skin preparation or the use of electrolytic gels. The invention is further directed to an encouragement ring which stabilizes and helps situate the physiological recording device on a subject's skin to help provide a better electrical signal, increase surface area, and reduce and minimize noise and artifacts during the process of recording or monitoring a physiological signal. The invention is still further directed to surface features on a surface of the physiological recording device with a size and shape that will not substantially bend or break, which limits the depth of application of the recording device, and/or anchors the recording device during normal application. The invention is even further directed to a method for manufacturing a physiological recording device, and minimizing cost of manufacture.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: August 13, 2019
    Assignee: Orbital Research Inc.
    Inventors: Frederick J Lisy, Brian M Kolkowski, Mark Pennington
  • Patent number: 10272269
    Abstract: Described herein are methods and devices for selectively applying either fluids (e.g., anesthetics, nerve-blockers, etc.) or energy, such as radiofrequency or ultrasound energy, to a target tissue from within a blood vessel while minimizing the amount of fluid or energy applied to non-target tissue. The catheters described herein may include an elongate body, a directional injector, and one or more holdfasts for securing the catheter. In addition, catheters can include energy applying features for delivering energy to the target tissue.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: April 30, 2019
    Assignee: Silk Road Medical, Inc.
    Inventors: Michi E. Garrison, Richard M. Ruedy
  • Patent number: 10251699
    Abstract: Surgical systems and methods for administering an ablation treatment and other therapeutic or diagnostic protocols to a patient tissue involve a flexible stabilizer mechanism having an inner recess and an ablation mechanism coupled with the stabilizer mechanism.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: April 9, 2019
    Assignee: AtriCure, Inc.
    Inventors: Tamer Ibrahim, Dwight P. Morejohn, Michael J. Banchieri, Ara Stephanian, John D. Pavlidis, David K. Swanson
  • Patent number: 9883908
    Abstract: Medical devices are described for performing mapping, ablating, and/or pacing procedures on one or more layers of the cardiac wall via an epicardial approach in a minimally invasive (e.g., orthoscopic) surgical procedure. One of the medical devices described includes a main support member and one or more secondary support members extending outwardly from the main support member having electrodes configured to receive electrical impulses. The secondary support member may include a support pad configured to be removably attached to a corresponding area of the epicardium for holding the medical device in place during a procedure, such as through application of vacuum pressure via a containment dome provided on each secondary support member. Further, an ablating electrode may be slidably disposed along the main support member for transmitting energy to a target site proximate the electrode. Associated methods are also described.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: February 6, 2018
    Assignee: The Charlotte-Mecklenburg Hospital Authority
    Inventors: Jeko Metodiev Madjarov, John Michael Fedor, Jackie H. Kasell
  • Patent number: 9763590
    Abstract: The present invention is directed to a physiological recording device, or other types of sensors to detect a biopotential, and more particularly, a physiological recording electrode that can be used without skin preparation or the use of electrolytic gels. The invention is further directed to the configurations of structures on the physiological recording electrode's lower surface. The structures having a length, width, and height, which are capable, at least in part, of transmitting an electric potential from the skin which can be measured. The structures may or may not limit the depth of application, and/or anchor the electrode or other device during normal application, and/or allow for uniform application of the electrode or other device over unprepared skin.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: September 19, 2017
    Assignee: Orbital Research Inc.
    Inventors: Aaron Rood, Greg S. Shaw, Matthew Birch, Frederick J. Lisy
  • Patent number: 9060705
    Abstract: An electrode assembly for electrical impedance tomography comprising a plurality of different electrode modules, each containing a support strap made of a flexible material that presents a reduced longitudinal deformability and carrying a predetermined number of electrodes, each support strap being dimensioned to be seated and retained onto a respective extension portion of a body segment of a patient. Each electrode module presents the number of electrodes and a distance “De” between each two consecutive electrodes predetermined as a function of a specific operational pattern to be obtained from each electrode module. The assembly can further comprise an electrical conducting cable having an end connected to a monitoring apparatus and a free end provided with a connector to be coupled to a respective electrode of an electrode module.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: June 23, 2015
    Assignees: Autopoiese Participacoes, LTDA, Timpel, S/A
    Inventors: Albert Holzhacker, Stephan H. Boehm, Diogo Moretti Branchini
  • Publication number: 20150141790
    Abstract: A sensor instrument for generation of electrocardiograms, in particular for cardiac computed tomography, has two electrodes, an electronic module and a support, wherein multiple suction elements for affixing the support to the body of a subject (are positioned on the support.
    Type: Application
    Filed: November 18, 2014
    Publication date: May 21, 2015
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Thilo Hannemann, Andre Henning
  • Publication number: 20140155724
    Abstract: The present invention relates to a wearable device (10) wearable by a user for measuring skin conductance of the user (1), the wearable device comprising at least two skin conductance electrodes (12) for contacting skin (2) of the user, and an elastic material portion (14) which surrounds the skin conductance electrodes (12) and forms a material surface (16). The elastic material of the elastic material portion (14) is non-permeable for gaseous and liquid substances. The present invention further relates to a method of manufacturing such a wearable device (10).
    Type: Application
    Filed: July 10, 2012
    Publication date: June 5, 2014
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Martin Ouwerkerk, Joanne Henriëtte Desirée Monique Westerink
  • Patent number: 8688228
    Abstract: The present invention is directed to systems, apparatus, methods and procedures for the noninvasive treatment of tissue using microwave energy. In one embodiment of the invention a medical device and associated apparatus and procedures are used to treat dermatological conditions using microwave energy.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: April 1, 2014
    Assignee: Miramar Labs, Inc.
    Inventors: Jessi Ernest Johnson, Mark E. Deem, Daniel Francis, Steven Kim, Alexey Salamini, Ted Su, Peter Smith, Daniel Hallock, Yoav Ben-Haim, Shailendhar Saraf
  • Patent number: 8326434
    Abstract: A medical electrical lead electrode assembly includes an insulative carrier and at least one conductive component. The at least one conductive component includes an electrode portion disposed on a first side of the carrier and at least one tab extending away from the electrode portion, through the carrier to a second side of the carrier. The electrode portion of the at least one component includes an outward facing contact surface and an inward facing surface, the inward facing surface being disposed opposite the contact surface and against a surface of the first side of the carrier. The electrode assembly further includes a joint coupling a flexible elongate conductor to the tab of the at least one component on the second side of the carrier, and an insulative layer extending over the joint and the tab and the conductor, the insulative layer being bonded to the second side of the carrier.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: December 4, 2012
    Assignee: Medtronic, Inc.
    Inventors: Sean Patrick Skubitz, Mary Boatwright, Stephen L. Bolea, Jessica L. Tower, Michael E. Metzler
  • Patent number: 8326397
    Abstract: Disclosed herein is a mountable unit for biological signal measurement, including: three electrodes; and a support body configured to support the three electrodes at positions corresponding to a positional relationship among a predetermined position on a forehead on one side of a face bounded by a midline, a temple position on the one side of the face, and a predetermined position on a zygomatic body on the one side of the face.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: December 4, 2012
    Assignee: Sony Corporation
    Inventor: Kazuhiro Nakagawa
  • Publication number: 20120271141
    Abstract: An apparatus (10) adapted to contact epithelial tissue, the apparatus comprising a cup (12) having a concave shape and adapted to be positioned on epithelial tissue, the cup capable of maintaining a reduced air pressure and holding a volume of flowable material; and an electrical support structure (14) comprising a support structure and a plurality of sensors, electrodes, or both (15) configured to interact with epithelial and subepithelial tissue.
    Type: Application
    Filed: October 18, 2010
    Publication date: October 25, 2012
    Applicant: Epi-Sci. LLC
    Inventors: Richard J. Davies, Mary K. Davies
  • Patent number: 7972273
    Abstract: A pressure sensor is deployed in the right atrium and is in contact with the tissue of the fossa ovalis. The fossa ovalis acts as a membrane and the pressure sensor determines the relative and/or absolute pressure within the left atrium while remaining within the right atrium. A variety of embodiment are provided to deploy and anchor the sensor into the proper position.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: July 5, 2011
    Assignee: Medtronic, Inc.
    Inventors: Douglas A. Hettrick, Todd M. Zielinski
  • Patent number: 7927282
    Abstract: A pressure sensor is deployed in the right atrium and is in contact with the tissue of the fossa ovalis. The fossa ovalis acts as a membrane and the pressure sensor determines the relative and/or absolute pressure within the left atrium while remaining within the right atrium. A variety of embodiment are provided to deploy and anchor the sensor into the proper position.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: April 19, 2011
    Assignee: Medtronic, Inc.
    Inventors: Douglas A. Hettrick, Todd M. Zielinski
  • Patent number: 7850615
    Abstract: A pressure sensor is deployed in the right atrium and is in contact with the tissue of the fossa ovalis. The fossa ovalis acts as a membrane and the pressure sensor determines the relative and/or absolute pressure within the left atrium while remaining within the right atrium. A variety of embodiment are provided to deploy and anchor the sensor into the proper position.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: December 14, 2010
    Assignee: Medtronic, Inc.
    Inventors: Douglas A. Hettrick, Todd M. Zielinski
  • Patent number: 7747326
    Abstract: The method described herein relates to using electrical and/or chemical stimulation to treat depression or anxiety related disorders, such as obsessive compulsive disorder. More specifically, the inferior thalamic peduncle or reticular thalamic nucleus is stimulated to treat depression or anxiety related disorders.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: June 29, 2010
    Assignee: Advanced Neuromodulation Systems, Inc.
    Inventors: Francisco Velasco, Fiacro Jimenez, Marcos Velasco, Andres M Lozano
  • Publication number: 20100049026
    Abstract: In general, invention is directed to devices for use in surgical procedures in which a medical implant is affixed to or implanted within an exterior surface of a body organ. A system, for example, is described that includes a cannula and a delivery instrument disposed within the cannula to fix a medical implant to an exterior surface of an organ. The delivery instrument has a distal end including a cavity and a vacuum port to draw a portion of the exterior surface of the organ into the cavity. The medical implant is affixed to the portion of the exterior surface drawn into the cavity of the delivery instrument.
    Type: Application
    Filed: September 18, 2009
    Publication date: February 25, 2010
    Applicant: Medtronic, Inc.
    Inventor: Martin T. Gerber
  • Patent number: 7628761
    Abstract: An apparatus and method for detecting physiological function, for example, nerve conduction, is described. In one embodiment the apparatus includes a housing including a stimulator shaped to fit a first anatomical site and a detector shaped to fit a second anatomical site. The housing automatically positions the detector substantially adjacent to the second anatomical site when the stimulator is positioned substantially adjacent to the first anatomical site. The detector contains a plurality of individual detection elements, whereby the response evoked by stimulation at the first anatomical site is measured using one or more of these detection elements at the second anatomical location.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: December 8, 2009
    Assignee: NeuroMetrix, Inc.
    Inventors: Shai N. Gozani, Ann Pavlik Meyer, Xuan Kong, Martin D. Wells
  • Patent number: 7054677
    Abstract: The present invention provides for an ECG electrode system that includes the use of electrodes adapted to attach to the body via suction. The invention includes a lightweight and compact air pump in combination with air connection hoses, a lightweight air distribution unit, associated electrode tubes, and respective electrodes adapted to be positioned by the Venturi principle, and corresponding electrical leads and recorders/monitors. The electrode leads can each be positioned within respective air connections hoses, e.g., in a manner that is concentric or coaxial with the axis of the connection hoses, in order to both protect the leads themselves and facilitate their positioning.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: May 30, 2006
    Assignee: Venturi Medical Systems
    Inventors: Mark J. Hastings, Hans-Peter Feucht, Albert Michael Harder, Donald John Evans
  • Patent number: 7041057
    Abstract: A tissue interface device (10) suitable for positioning on or about one or more artificial openings in a biological membrane of an organism and for coupling to a monitor and control unit and a vacuum source. The tissue interface device (10) comprises a housing (100), a sensor channel (130), and a sensor (150). The housing (100) defines an orifice (120), the orifice (120) having an open inlet port (122) on the bottom end (102) of the housing (100) and a distal end (124) that is in fluid communication with the sensor channel (130). The orifice (120) is in fluid communication with fluid that flows from the artificial opening formed in the biological membranes. The sensor channel (130) is for coupling to, and fluid communication therewith, the vacuum source. The sensor (150) is positioned in the sensor channel (130) in a flow path of the fluid for sensing a characteristic of the fluid as it flows out from the artificial opening. The sensor generates a sensor signal representative thereof.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: May 9, 2006
    Assignee: SpectRx, Inc.
    Inventors: Mark L. Faupel, Krishna Kumar, J. David Farquhar, Mark Vreeke, Alan Smith, Michael Hatch, Teresa Woods
  • Patent number: 6514250
    Abstract: A suction assisted ablation device having a support surface, suction elements disposed adjacent the support surface, at least one electrode and at least one suction conduit is provided. The device may further include fluid openings, which allow fluid to irrigate target tissue and aid in ablation. A method for ablating tissue using suction is also provided.
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: February 4, 2003
    Assignee: Medtronic, Inc.
    Inventors: Scott E. Jahns, Donald N. Jensen, David Lipson, Jon M. Ocel, Gregory P. Werness
  • Patent number: 6456865
    Abstract: A non-invasive medical probe includes a suction cup adapted to be secured by vacuum to a patient's skin and supporting an electrode, a source of vacuum, and a resilient walled tube structure connecting the source of vacuum to the suction cup, the source of vacuum including a resilient bellows operative when fully compressed and then released to apply a predetermined low level of vacuum to the suction cup and an arrangement connected with the bellows for enabling the bellows to be further extended manually in order to increase the vacuum applied to the suction cup to a higher level, the arrangement including a thumb ring secured to a closed end of the bellows and a finger abutment at an opposite end of the bellows.
    Type: Grant
    Filed: January 17, 2001
    Date of Patent: September 24, 2002
    Inventor: Ilan Zadik Samson
  • Publication number: 20020091313
    Abstract: A contactor for establishing electrical Communication with organic tissue, the contactor including a cup-shaped housing of one-piece rubbery material including a closing end-wall connected across an annular sidewall with rice defining an open mouth into a main recess. An electrode in the recess corgi a contact plate with first side facing the mouth to contact organic tissue, and a second side with a pair of leg-like extensions and a center limiter post ail of one-piece molded plastics coated with a thin layer of conductor preferably silver/silver chloride to be electrically conductive on the exterior surface of the electrode. The legs of the electrode snap fit against to physically and electrically connect with an electrically conductive venturi tube mounted extending through the housing, the venturi tube having a suction port positioned such that when high pressure gas is passed through the venturi tube, a vacuum is created within the housing recess.
    Type: Application
    Filed: February 5, 2002
    Publication date: July 11, 2002
    Inventors: Hans-Peter Feucht, Albert Michael Harder, Mark J. Hastings, Donald John Evans
  • Patent number: 6366795
    Abstract: An electrolyte (70) for use in a single-use biomedical electrode assembly (A, B, C, D) designed for receiving body-generated electrical signals at a patient's skin surface includes: Component Range (%) Skin penetration agent 10-25  Thickener 0-10 Alkali metal or alkaline earth 1-13 metal chloride Alkali metal or alkali earth 1-13 metal nitrate Surfactant 0.001-5    Soluble silver salt, as silver   0-0.01 Buffer 0-10 Water Q.S. The skin penetration agent improves penetration of the outer, dead skin layers by the electrolyte, thereby improving pickup of minute electrical signals generated within the patient's body. A preferred skin penetration agent includes sodium 2-pyrrolidone-5 carboxylate at a concentration of 15-20% by weight of the electrolyte composition.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: April 2, 2002
    Assignee: Biosignal Partners
    Inventors: Roger E. Bremer, Daniel T. Pogany, John M. Questel
  • Patent number: 6364876
    Abstract: A securing apparatus for selectively securing an ablating element of an ablation instrument proximate to a targeted region of a biological tissue. The securing apparatus includes a support base affixed to the ablation instrument relative the ablating element, and having a support face adapted to seat against the biological tissue proximate to the ablation element. The support base further defines a passage having one end communicably coupled to a vacuum source and an opposite end terminating at an orifice at the support face. The support face together with the biological tissue forms a hermetic seal thereagainst during operation of the vacuum source to secure the ablation instrument thereagainst. Essentially, the hermetic seal and the vacuum source cooperate to form a vacuum force sufficient to retain the ablation device against the biological tissue.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: April 2, 2002
    Assignee: AFx, Inc.
    Inventors: Lyndall Erb, Dany Berube, Robert Matheny, Robert E. Woodard, Theodore C. Ormsby
  • Patent number: 6345192
    Abstract: A contactor for establishing electrical communication with organic tissue, the contactor including a cup-shaped housing of one-piece rubbery material including a closing end-wall connected across an annular sidewall with rim defining an open mouth into a main recess. An electrode in the recess comprises a contact plate with first side facing the mouth to contact organic tissue, and a second side with a pair of leg-like extensions and a center limiter post all of one-piece molded plastics coated with a thin layer of conductor preferably silver/silver chloride to be electrically conductive on the exterior surface of the electrode. The legs of the electrode snap fit against to physically and electrically connect with an electrically conductive venturi tube mounted extending through the housing, the venturi tube having a suction port positioned such that when high pressure gas is passed through the venturi tube, a vacuum is created within the housing recess.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: February 5, 2002
    Assignee: Venturi Medical Systems, LLC
    Inventors: Peter Feucht, Albert Harder, Mark J. Hastings, John Evans
  • Publication number: 20010005775
    Abstract: A non-invasive medical probe includes a suction cup adapted to be secured by vacuum to a patient's skin and supporting an electrode, a source of vacuum, and a resilient walled tube structure connecting the source of vacuum to the suction cup, the source of vacuum including a resilient bellows operative when fully compressed and then released to apply a predetermined low level of vacuum to the suction cup and an arrangement connected with the bellows for enabling the bellows to be further extended manually in order to increase the vacuum applied to the suction cup to a higher level, the arrangement including a thumb ring secured to a closed end of the bellows and a finger abutment at an opposite end of the bellows.
    Type: Application
    Filed: January 17, 2001
    Publication date: June 28, 2001
    Inventor: Ilan Zadik Samson
  • Patent number: 6185442
    Abstract: Vacuum in a non-invasive medical probe having a source of vacuum interconnected with a suction cup by a resilient walled tube, is reduced in a controlled manner by creating a valve aperture in the wall of the tube at a desired location through which aperture no appreciable leakage will occur when vacuum is applied and the tube is in a relaxed state, whereby with the suction cup secured by vacuum on a patient's skin, application of a force to the tube wall will open the aperture and permit a controlled reduction of vacuum in the suction cup to a specified amount. Releasing the force permits the aperture to close so that lower vacuum is maintained and the suction cup continues to be secured on the patient's skin. In a preferred application there is provided a probe adapted for application to the scalp of a fetus with the rim of the suction cup in sealing contact with the surface of the scalp.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: February 6, 2001
    Inventor: Ilan Zadik Samson
  • Patent number: 6138044
    Abstract: The invention relates to an electrode device (20), which for the purpose of obviating problems that have existed so far is applicable to the skin in an airtight manner for raising, by means of negative pressure and preferably heat, a portion of the epidermis and causing interstitial fluid and/or the epidermal basement membrane to contact an electrode for a measuring operation.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: October 24, 2000
    Inventor: P.ang.l Svedman
  • Patent number: 6117077
    Abstract: A self contained, compact, long term, ambulatory physiological recorder is designed for mounting directly to the body of a patient, immediately adjacent to the organ or system that is to be monitored, and is adhesively and covertly held there in place and comfortably under clothing by the very transducer, skin electrodes that detect the physiological information to be recorded, and thereby increasing continuity and decreasing artifact by obviating the need for numerous and cumbersome, hanging electrode leads as well as unsightly and cumbersome recorder pouches suspended from shoulder straps or belts.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: September 12, 2000
    Assignee: Del Mar Medical Systems, LLC
    Inventors: Bruce Eugene Del Mar, Raphael Henkin, John A. Bachman
  • Patent number: 6064901
    Abstract: A biomedical electrode for an electrocardiograph or similar device is provided. The biomedical electrode includes a disposable electrode having an electrically conductive gel layer and a smooth layer film. The disposable electrode interfaces with a reusable leadwire connector having the relatively expensive metallic conductive material. The reusable leadwire adapter includes a vinyl top layer which attaches to the smooth layer film of the disposable electrode through surface attraction. The reusable leadwire adapter may include a suction cup which attaches to the disposable electrode through a partial vacuum. The reusable leadwire also includes a stud member which snaps into a standard leadwire connector.
    Type: Grant
    Filed: June 17, 1998
    Date of Patent: May 16, 2000
    Assignee: NDM, Inc.
    Inventors: James Vernon Cartmell, Michael Lee Wolf, Wayne Robert Sturtevant
  • Patent number: 6023631
    Abstract: A biomedical electrode for an electrocardiograph or similar device is provided. The biomedical electrode includes a disposable electrode having an electrically conductive gel layer and a smooth layer film. The disposable electrode interfaces with a reusable leadwire connector having the relatively expensive metallic conductive material. The reusable leadwire adapter includes a vinyl top layer which attaches to the smooth layer film of the disposable electrode through surface attraction. The reusable leadwire adapter may include a suction cup which attaches to the disposable electrode through a partial vacuum. The reusable leadwire also includes a stud member which snaps into a standard leadwire connector.
    Type: Grant
    Filed: June 17, 1998
    Date of Patent: February 8, 2000
    Assignee: NDM, Inc.
    Inventors: James Vernon Cartmell, Michael Lee Wolf, Wayne Robert Sturtevant
  • Patent number: 5916157
    Abstract: An electrode patch used in tests of physical health conditions such as an electrocardiograph (ECG) electrode patch having marking means which leaves a position mark in the test site on a person being tested to permit accurate location of the site for accurate placement of electrode patches in subsequent tests in a series of test procedures on the site.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: June 29, 1999
    Assignee: Charles F. Schroeder
    Inventor: Steven J. Crosz, Jr.
  • Patent number: 5891028
    Abstract: Biomedical measurements such as ECG or EEG measurements are frequently performed using a suction electrode. An electrolyte is applied to the skin of the patient and a suction electrode is placed thereon to form an electrically conducting connection between the skin and the electrode. In accordance with the present invention and hygienic improvement is provided by introducing an interface element between the skin of the patient and the reusable electrode. The interface element is preferably provided in the form of a lamellar substrate for an electrolyte having a skin contact surface and an opposed electrode contact surface. The substrate further includes a central portion, a peripheral margin portion and an intermediate portion disposed between the central portion and the peripheral margin portion. The peripheral margin portion is adapted to form a vacuum seal against the skin of the patient with a seal portion of an applied biomedical electrode.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: April 6, 1999
    Assignee: Humanteknik AB
    Inventor: Stig Lundback
  • Patent number: 5842985
    Abstract: A reusable electrode holder and associated disposable electrode unit are provided. The holder retains the electrode therein and is connectable to a vacuum source for holding the electrode against a patient's skin with vacuum suction. The holder is also connectable to an electrical lead for connection to the electrode unit. The holder has a resilient cap which is moveable to actuate a valve to open communication through the holder from the vacuum source to a chamber adjacent the skin. To prevent the transfer of contaminants from the skin to reusable parts of the holder, a first contaminant absorber is provided within a housing of the holder and a second contaminant absorber is provided as part of the electrode unit. A second valve can be provided which is actuatable to close vacuum communication when second absorber expands to a threshold contamination condition.
    Type: Grant
    Filed: June 25, 1996
    Date of Patent: December 1, 1998
    Assignee: Humanteknik AB
    Inventor: Stig Lundback
  • Patent number: 5803911
    Abstract: A system for reliably and accurately measuring the electrocardiographic waveform generated by a subject's cardiac muscle includes electrocardio electrodes that have multiple openings on their surfaces, a body contact determination circuit for determining if a subject is in physical contact with the electrocardio electrodes, a blow control circuit for causing air to flow out of the multiple openings of the electrocardio electrode when the subject is not in physical contact with the electrocardio electrodes and a suction control circuit for causing air to be sucked through the multiple openings of the electrocardio electrodes when the subject is in physical contact with the electrocardio electrodes. In a preferred embodiment, a pulse wave propagation velocity determining circuit is used to determine the propagation velocity of a subject's pulse wave.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: September 8, 1998
    Assignee: Colin Corporation
    Inventors: Hidekatsu Inukai, Hiroshi Sakai, deceased