Patents Assigned to SurVivaLink Corporation
  • Publication number: 20020138104
    Abstract: An apparatus and method for determining an optimal transchest external defibrillation waveform that provides for variable energy in the first or second phase of a biphasic waveform that, when applied through a plurality of electrodes positioned on a patient's torso, will produce a desired response in the patient's cardiac cell membranes. The method includes the steps of providing a quantitative model of a defibrillator circuit for producing external defibrillation waveforms, the quantitative model of a patient includes a chest component, a heart component, a cell membrane component and a quantitative description of the desired cardiac membrane response function. Finally, a quantitative description of a transchest external defibrillation waveform that will produce the desired cardiac membrane response function is computed. The computation is made as a function of the desired cardiac membrane response function, the patient model and the defibrillator circuit model.
    Type: Application
    Filed: February 19, 2002
    Publication date: September 26, 2002
    Applicant: SurVivaLink Corporation
    Inventors: James E. Brewer, Gary B. Stendahl, Kenneth F. Olson
  • Patent number: 6411846
    Abstract: An apparatus and method for determining an optimal transchest external defibrillation waveform that provides for variable energy in the first or second phase of a biphasic waveform that, when applied through a plurality of electrodes positioned on a patient's torso, will produce a desired response in the patient's cardiac cell membranes. The method includes the steps of providing a quantitative model of a defibrillator circuit for producing external defibrillation waveforms, the quantitative model of a patient includes a chest component, a heart component, a cell membrane component and a quantitative description of the desired cardiac membrane response function. Finally, a quantitative description of a transchest external defibrillation waveform that will produce the desired cardiac membrane response function is computed. The computation is made as a function of the desired cardiac membrane response function, the patient model and the defibrillator circuit model.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: June 25, 2002
    Assignee: SurVivaLink Corporation
    Inventors: James E. Brewer, Gary B. Stendahl, Kenneth F. Olson
  • Patent number: 6366809
    Abstract: A defibrillator battery includes at least one battery cell, a housing surrounding the at least one battery cell, and a memory connected to the at least one battery cell. The memory can be positioned inside of the housing that surrounds the at least one battery cell. The defibrillator battery can be used with a defibrillator including a battery status indicator which communicates with the defibrillator battery to indicate the status of the defibrillator battery. In a method of determining defibrillator battery status using the defibrillator battery and associated battery status indicator enables an operator to always determine the remaining charge of the battery and to determine when to replace the battery. The defibrillator battery, and associated battery status indicator, insures constant readiness of an automated external defibrillator for defibrillating a patient by preventing defibrillator failure due to an unknown reduced battery charge.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: April 2, 2002
    Assignee: SurVivaLink Corporation
    Inventors: Kenneth F. Olson, William S. Parker
  • Patent number: 6321113
    Abstract: A method and system for managing cardiac rescue events is disclosed. Unlike prior systems, this method and system uses a rescue scene computer to obtain patient and incident data at the rescue scene and then marry that data with ECG rescue data and automated external defibrillator (AED) rescue data. All of this data is then simultaneously transmitted to a base computer at an emergency medical center for review. Accordingly, a reviewer at the base computer can immediately review the ECG and AED performance in context with patient and incident data. The method and system includes a Windows-based single screen graphical user interface for entering and reviewing the data and particularly includes a window for viewing ECG data simultaneously with entry and review of all other data available in the single screen user interface.
    Type: Grant
    Filed: March 30, 1999
    Date of Patent: November 20, 2001
    Assignee: SurVivaLink Corporation
    Inventors: William S. Parker, Patrick J. Splinter, Sarah M. Lindseth, Matthew G. Bradley
  • Patent number: 6263238
    Abstract: In an automatic external defibrillator (AED) having a ventricular fibrillation detector, the ventricular fibrillation detector may generally be defined as a filter containing both an adaptive non-linear section and a linear section. The non-linear section is preferably a complex-domain neural network that can be trained to differentiate between various rhythm patterns and produce linear data for input to the linear section. The linear section is preferably an ongoing, continuous operation based on a sliding window of a predetermined time period, e.g., a tapped time-delay filter. In combination the non-linear section and linear section of the filter operate to detect and extract artifacts from a patient's ECG signal in a substantially accurate fashion so that the determination to deliver a defibrillation pulse may be accurately made.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: July 17, 2001
    Assignee: SurVivaLink Corporation
    Inventors: James E. Brewer, Ann M. Donohoo, Kenneth F. Olson
  • Patent number: 6263239
    Abstract: A method for determining an optimal transchest external defibrillation waveform which, when applied through a plurality of electrodes positioned on a patient's torso will produce a desired response in the patient's cardiac cell membranes. The method includes the steps of providing a quantitative model of a defibrillator circuit for producing external defibrillation waveforms, the quantitative model of a patient includes a chest component, a heart component, a cell membrane component and a quantitative description of the desired cardiac membrane response function. Finally, a quantitative description of a transchest external defibrillation waveform that will produce the desired cardiac membrane response function is computed. The computation is made as a function of the desired cardiac membrane response function, the patient model and the defibrillator circuit model.
    Type: Grant
    Filed: August 26, 1999
    Date of Patent: July 17, 2001
    Assignee: SurVivaLink Corporation
    Inventors: James E. Brewer, Gary B. Stendahl, Kenneth F. Olson
  • Patent number: 6198967
    Abstract: The present invention discloses a method and device in which an external defibrillator is integrated with an algorithm implemented in a programmable microprocessor which controls and manages the formation of defibrillation waveforms. The waveforms are dynamically adjusted and created to be consistent with a myocardial cell response waveform. Dynamic tilt calculations based on time slices and corresponding fit functions based on best-fit models are used to generate the waveforms. The waveforms include a first and a second phase and are formed with minimal delay therebetween.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: March 6, 2001
    Assignee: SurVivaLink Corporation
    Inventors: James E. Brewer, Kenneth F. Olson, Byron L. Gilman, R. Eric Bosler
  • Patent number: 6134479
    Abstract: An energy delivery system for use with an automatic external defibrillator (AED), the AED having a case containing a plurality of AED components, a battery electrically coupled to a control system, the control system communicatively coupled to a charge system, the charge system for generating a stored quantity of energy responsive to a communication from the control system, the control system selectively commanding a discharge of the stored energy to an electrical connector, the energy delivery system includes three electrodes, each electrode for making electrical contact with a skin surface of a patient, each electrode being in electrical contact with the electrical connector for communicating the stored energy to the patient.
    Type: Grant
    Filed: February 3, 1999
    Date of Patent: October 17, 2000
    Assignee: SurVivaLink Corporation
    Inventors: James E. Brewer, Charles D. Swerdlow, Kenneth F. Olson
  • Patent number: 6125299
    Abstract: A force sensor, for use in combination with an automated electronic defibrillator (AED), includes a first conductive layer. A second conductive layer is spaced apart from the first conductive layer such that no electrical communication occurs between the first and second conductive layers. An electrical communication device is provided for establishing electrical communication between the first and second conductive layers responsive to the application of a force to said electrical communication means.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: September 26, 2000
    Assignee: SurVivaLink Corporation
    Inventors: Allen W. Groenke, James E. Brewer
  • Patent number: 6125298
    Abstract: An automatic external defibrillator (AED) includes a device for scaling the stored energy communicated to the patient responsive to a known patient weight. An electrode set, for use with an automatic external defibrillator (AED), the AED includes a plurality of electrodes for making electrical contact with a skin surface of a patient. Each electrode of the plurality of electrodes is electrically connectable to a electrical connector for communicating a stored energy to a patient. The electrodes system further includes a device for scaling the stored energy communicated to the patient responsive to a known patient weight.
    Type: Grant
    Filed: April 21, 1999
    Date of Patent: September 26, 2000
    Assignee: SurVivaLink Corporation
    Inventors: Kenneth F. Olson, Byron L. Gilman
  • Patent number: 6115638
    Abstract: An electrode system includes a release liner separating a pair of electrodes. The release liner includes a first portion having electrically conductive and non-stick characteristics and a second portion having electrically non-conductive and non-stick characteristics. An electrically conductive portion of the electrode is disposed over the first portion while an adhesive only, electrically non-conductive portion of the electrode is disposed over the second portion. The release liner includes a pair of electrically non-conductive sheets and an electrically conductive sheet interposed between the non-conductive sheets. The non-conductive sheets include an aperture to expose a portion of the conductive sheet for providing electrical conductivity between the pair of electrodes.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: September 5, 2000
    Assignee: SurVivaLink Corporation
    Inventor: Allen W. Groenke
  • Patent number: 6101413
    Abstract: Defibrillator electrodes having an identification element and a circuit which indicates to an AED the weight range of the patient being rescued. When the AED detects the presence of pediatric electrodes, it may select a different set of voice prompts that are specifically suited to a pediatric patient and/or it may select a pediatric dosage of electricity for the therapeutic shock.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: August 8, 2000
    Assignee: SurVivaLink Corporation
    Inventors: Kenneth F. Olson, Byron L. Gilman, James E. Brewer
  • Patent number: 6088616
    Abstract: An automated external programmable defibrillator (AED) with the ability to perform operational self-tests, determine whether a patient is undergoing cardial defibrillation, deliver an electrical defibrillation pulse, store data pertaining to the self-tests. Certain operational parameters are alterable by software installable in a computer. The operational parameters include second defibrillation shock energy value, the maximum shocks to be delivered during a rescue, whether the same energy will be delivered to the patient upon conversion to a shockable rhythm, whether the AED will automatically convert to daylight savings time, whether an electrode test will occur during the self-test, and whether ambient sound will be recorded during a rescue.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: July 11, 2000
    Assignee: SurVivaLink Corporation
    Inventors: Kenneth F. Olson, William S. Parker, Michael A. Tvedt
  • Patent number: 6083246
    Abstract: A lid open detection circuit for powering ON an automated external defibrillator having a housing and an openable lid formed in the housing, generally incorporates a switch that has a first state for powering ON the AED when the openable lid is open and a second state for powering OFF the AED when the openable lid is closed. The switch is preferably a Hall effect switch.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: July 4, 2000
    Assignee: SurVivaLink Corporation
    Inventors: Gary B. Stendahl, Michael D. Welsch
  • Patent number: 6064909
    Abstract: An automated external defibrillator (AED) having a housing and an openable lid with a water resistant speaker port formed in the housing below the openable lid. A water resistant fabric is attached underneath the speaker port to resist water passing into the interior of the AED while allowing clear sound output from the speaker located beneath the speaker port. A microphone is positioned adjacent to the speaker port in the AED for recording emergency scene ambient activities. This position uses the existing water resistant opening thereby taking advantage of the good sound transmitting properties of the opening for recording purposes and at the same time eliminating the need for an additional cavity in the housing where water could ingress. Positioning the microphone near the speaker also eliminates the need for an additional wiring harness.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: May 16, 2000
    Assignee: SurVivaLink Corporation
    Inventors: Steven D. Barkley, Robert K. Johnson, Nora J. Utke
  • Patent number: 6038473
    Abstract: A defibrillator battery pack comprises a housing having a first set of battery cells having an upper set and a lower set of cells and a second set of battery cells connected in parallel with one of the upper or the lower sets of the first set of battery cells. The first set of battery cells is used for charging a capacitor bank of a defibrillator. The second set of battery cells cannot be used for charging and is only used for developing a nominal 5 volts to drive a microprocessor and other circuitry components of an electrical control system of the defibrillator. This arrangement increases the life of the battery pack in the lower voltage range, which is advantageous for operating the microprocessor. This arrangement also maintains the intelligence of the electrical control system because the battery cells supplying power to the microprocessor will always fail after, and not before, failure of the battery cells supplying power for charging the capacitor bank.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: March 14, 2000
    Assignee: SurVivaLink Corporation
    Inventors: Kenneth F. Olson, Byron L. Gilman, Gary B. Stendahl
  • Patent number: 6029085
    Abstract: A fail-safe safety circuit for a portable automated external defibrillator allows earlier charging of capacitors. In turn, the earlier charging of the capacitors allows quicker release of a defibrillation shock than prior art method of automatically detecting the appropriateness of administering a defibrillation shock and subsequently preparing the shock.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: February 22, 2000
    Assignee: SurVivaLink Corporation
    Inventors: Kenneth F. Olson, Byron L. Gilman
  • Patent number: 5999493
    Abstract: A system for automatically synchronizing, isolated clocks is disclosed. In the preferred embodiment, the internal clock of an automated external defibrillator (AED) or an external defibrillator (ED) is integrated with a radio broadcast to receive standard time. The system may also include a mechanism for synchronizing the clock or a computer tracking the time of emergency calls such as 911. Further, the system enables synchronization between the AED or ED internal clock and the 911 clock such that response times can be accurately determined.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: December 7, 1999
    Assignee: SurVivaLink Corporation
    Inventor: Kenneth F. Olson
  • Patent number: 5991658
    Abstract: The present invention is an external defibrillator which controls and manages the formation of defibrillation waveforms. The waveforms are dynamically adjusted and created to be consistent with a myocardial cell response waveform. Dynamic tilt calculations based on time slices and corresponding functions based on best-fit models are used to generate the waveforms. The waveforms are dynamically adjusted to compensate for changes in resistance due to changes in the voltage during delivery of the waveform. The waveforms include a first and a second phase and are formed with minimal delay therebetween.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: November 23, 1999
    Assignee: SurVivaLink Corporation
    Inventors: James E. Brewer, Kenneth F. Olson, Byron L. Gilman, R. Eric Bosler
  • Patent number: 5984102
    Abstract: The invention provides a sealed package system for housing at least two medical electrode devices and for enabling the periodic testing thereof, comprising a thin, generally flat flexible envelope constructed and arranged to form an interior cavity for enclosing a conductive gel contact surface of each of the electrode devices. A conductive liner is disposed between conductive gel contact surface of each of the electrode devices.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: November 16, 1999
    Assignee: SurVivaLink Corporation
    Inventor: Sew-Wah Tay