Patents by Inventor Touby Drew

Touby Drew has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7359837
    Abstract: Methods and apparatus for storing data records associated with an extreme value are disclosed. Signal data is stored in a first buffer of a set of buffers. If a local extreme value for the first buffer exceeds a global extreme value, signal data is stored in a second buffer of the set of buffers. This process is repeated, wrapping around and overwriting buffers until the signal data in a current buffer does not have a local extreme value that exceeds the global extreme value. When this happens, signal data may be stored in a subsequent buffer and if a local extreme value of the subsequent buffer does not exceed the global extreme value, further signal data may be stored in the subsequent buffer in a circular manner until either an instantaneous extreme value exceeds the global extreme value or the recording period ends. In an embodiment, the extreme value may be a peak value.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: April 15, 2008
    Assignee: Medtronic, Inc.
    Inventor: Touby A. Drew
  • Publication number: 20080046024
    Abstract: Systems and methods for detecting and/or treating nervous system disorders, such as seizures, are disclosed. Certain embodiments of the invention relate generally to implantable medical devices (IMDs) adapted to detect and treat nervous system disorders in patients with an IMD. Certain embodiments of the invention include detection of seizures based upon comparisons of long-term and short-term representations of physiological signals. Other embodiments include prediction of seizure activity based upon analysis of physiological signal levels. An embodiment of the invention monitors the quality of physiological signals, and may be able to compensate for signals of low signal quality. A further embodiment of the invention includes detection of seizure activity following the delivery of therapy.
    Type: Application
    Filed: December 12, 2006
    Publication date: February 21, 2008
    Applicant: MEDTRONIC, INC.
    Inventors: David Carlson, Eric Panken, Touby Drew, Jonathan Werder
  • Publication number: 20070255155
    Abstract: A method and apparatus is provided for handling multiple loop recordings that result from events in a limited memory implantable device. The events may include various automatic and manual triggers. The method provides a mechanism for deciding the amount of information to store associated with each overlapping loop recording.
    Type: Application
    Filed: April 27, 2006
    Publication date: November 1, 2007
    Applicant: Medtronic, Inc.
    Inventors: Touby Drew, David Carlson
  • Publication number: 20070255147
    Abstract: A method and apparatus is provided for handling multiple recordings that result from events in a limited memory device. The events may include various automatic and manual triggers. The method provides a mechanism for storing different configurations of data, associated with different events.
    Type: Application
    Filed: April 27, 2006
    Publication date: November 1, 2007
    Applicant: Medtronic, Inc.
    Inventors: Touby Drew, David Carlson
  • Publication number: 20070255531
    Abstract: Methods and apparatus for storing data records associated with an extreme value are disclosed. Signal data is stored in a first buffer of a set of buffers. If a local extreme value for the first buffer exceeds a global extreme value, signal data is stored in a second buffer of the set of buffers. This process is repeated, wrapping around and overwriting buffers until the signal data in a current buffer does not have a local extreme value that exceeds the global extreme value. When this happens, signal data may be stored in a subsequent buffer and if a local extreme value of the subsequent buffer does not exceed the global extreme value, further signal data may be stored in the subsequent buffer in a circular manner until either an instantaneous extreme value exceeds the global extreme value or the recording period ends. In an embodiment, the extreme value may be a peak value.
    Type: Application
    Filed: April 27, 2006
    Publication date: November 1, 2007
    Applicant: Medtronic, Inc.
    Inventor: Touby Drew
  • Patent number: 7288066
    Abstract: A method of data compression of physiological signals for use in implantable medical devices (IMDs) in which temporal information in the input data points is retained in the compressed sample points with a potential loss of amplitude precision. The data compression method includes distributing the stream of data samples or data points of the physiologic waveform into respective major data bins within the data range of the samples. Each major data bin can then be sub-divided into minor data bins. Compressed data points associated with the data samples are assigned values indicating which major data bin the original data point falls into, or which minor data bin the data point falls into if the data point immediately follows a data point in the same major data bin. Higher levels of revision beyond the major and minor bins may also be used to achieve greater levels of amplitude precision.
    Type: Grant
    Filed: November 1, 2004
    Date of Patent: October 30, 2007
    Assignee: Medtronic, Inc.
    Inventor: Touby A. Drew
  • Publication number: 20070250133
    Abstract: Systems and methods for detecting and/or treating nervous system disorders, such as seizures, are disclosed. Certain embodiments of the invention relate generally to implantable medical devices (IMDs) adapted to detect and treat nervous system disorders in patients with an IMD. Certain embodiments of the invention include detection of seizures based upon comparisons of long-term and short-term representations of physiological signals. Further embodiments of the invention include preparing for the delivery of therapy by warming up therapy delivery components prior to the expected delivery of therapy.
    Type: Application
    Filed: February 21, 2007
    Publication date: October 25, 2007
    Applicant: MEDTRONIC, INC.
    Inventors: David L. Carlson, Eric J. Panken, Touby A. Drew, Jonathan C. Werder
  • Publication number: 20070249953
    Abstract: Systems and methods for detecting and/or treating nervous system disorders, such as seizures, are disclosed. Certain embodiments of the invention relate generally to implantable medical devices (IMDs) adapted to detect and treat nervous system disorders in patients with an IMD. Certain embodiments of the invention include detection of seizures based upon comparisons of long-term and short-term representations of physiological signals. Other embodiments include prediction of seizure activity based upon analysis of physiological signal levels. A further embodiment of the invention includes detection of seizure activity following the delivery of therapy.
    Type: Application
    Filed: December 12, 2006
    Publication date: October 25, 2007
    Applicant: MEDTRONIC, INC.
    Inventors: Mark Frei, Ivan Osorio, David Carlson, Eric Panken, Touby Drew
  • Publication number: 20070249956
    Abstract: Systems and methods for detecting and/or treating nervous system disorders, such as seizures, are disclosed. Certain embodiments of the invention relate generally to implantable medical devices (IMDs) adapted to detect and treat nervous system disorders in patients with an IMD. Certain embodiments of the invention include detection of seizures based upon comparisons of long-term and short-term representations of physiological signals. Other embodiments include prediction of seizure activity based upon analysis of physiological signal levels. An embodiment of the invention monitors the quality of physiological signals, and may be able to compensate for signals of low signal quality. A further embodiment of the invention includes detection of seizure activity following the delivery of therapy.
    Type: Application
    Filed: December 12, 2006
    Publication date: October 25, 2007
    Applicant: MEDTRONIC, INC.
    Inventors: David L. Carlson, Eric J. Panken, Touby A. Drew, Jonathan C. Werder
  • Publication number: 20070249955
    Abstract: Systems and methods for detecting and/or treating nervous system disorders, such as seizures, are disclosed. Certain embodiments of the invention relate generally to implantable medical devices (IMDs) adapted to detect and treat nervous system disorders in patients with an IMD. Certain embodiments of the invention include detection of seizures based upon comparisons of long-term and short-term representations of physiological signals. Other embodiments include prediction of seizure activity based upon analysis of physiological signal levels. An embodiment of the invention monitors the quality of physiological signals, and may be able to compensate for signals of low signal quality. A further embodiment of the invention includes detection of seizure activity following the delivery of therapy.
    Type: Application
    Filed: December 12, 2006
    Publication date: October 25, 2007
    Applicant: MEDTRONIC, INC.
    Inventors: David L. Carlson, Eric J. Panken, Touby A. Drew, Jonathan C. Werder
  • Publication number: 20060287691
    Abstract: Methods for storing data records associated with a medical monitoring event in a data structure. An implanted device obtains data and stores the data in the data record in a first data structure that is age-based. Before an oldest data record is lost, the oldest data record may be stored in a second data structure that is priority index-based. The priority index may be determined by a severity level and may be further determined by associated factors. The implanted device may organize, off-load, report, and/or display a plurality of data records based on an associated priority index. Additionally, the implanted device may select a subset or composite of physiologic channels from the available physiologic channels based on a selection criterion.
    Type: Application
    Filed: November 2, 2005
    Publication date: December 21, 2006
    Applicant: Medtronic, Inc.
    Inventor: Touby Drew
  • Publication number: 20060264777
    Abstract: A medical device senses electrical activity within a patient and, in some embodiments, delivers stimulation to the patient via a plurality electrical paths, which include electrodes and associated conductors of one or more leads. The medical device determines whether a symptomatic event, such as a seizure, is detected based on the sensed electrical activity, and measures the impedance of one or more of the paths in response to the determination. If the medical device identifies a dysfunctional electrical path based on the measured impedance, the device may, as examples, disable the dysfunctional electrical path, or modify a stimulation or sensing program to not use the dysfunctional electrical path. In this manner, the medical device may identify inaccurate symptomatic event detection and, where the device delivers a therapy in response to such detection, such as stimulation via the electrical paths, avoid inappropriate therapy delivery.
    Type: Application
    Filed: April 27, 2006
    Publication date: November 23, 2006
    Applicant: Medtronic, Inc.
    Inventor: Touby Drew
  • Publication number: 20060235489
    Abstract: Methods for receiving a patient mark in an implanted device. A patient may experience symptoms that indicative of a neurological event or are common precursors to more severe clinical symptoms. The patient may activate a patient activator. Activation of the patient activator can cause the patient activator to transmit the patient mark to an implanted device. The implanted device may adjust physiological data being stored in response to the patient mark, including data before and after the patient mark. The patient mark may be used to fine tune the detection algorithms and otherwise tune the detection capability of the implanted device and may also be used as an aid in statistical analysis of the stored physiological data.
    Type: Application
    Filed: April 26, 2006
    Publication date: October 19, 2006
    Applicant: Medtronic, Inc.
    Inventors: Touby Drew, Jonathon Giftakis, Nina Graves
  • Publication number: 20060195039
    Abstract: Methods of generating an extended cluster are disclosed. A first cluster including data representative of a first signal indicative of an abnormal physiological symptom is generated. A second signal is detected as representing a second abnormal physiological symptom and the second abnormal physiological symptom continues after the first abnormal physiological symptom ends. An extended cluster including the data from the first signal and the second signal is generated that extends from the time when the first abnormal physiological symptom occurs to the time when the second abnormal physiological symptom ends. The first and the extended cluster may include data of both the first and second signals the entire period of the clusters. If desired, the first signal or the second signal may be provided from a sensor implanted in a patient's brain tissue.
    Type: Application
    Filed: April 26, 2006
    Publication date: August 31, 2006
    Applicant: Medtronic, Inc.
    Inventors: Touby Drew, Jonathan Werder, Jonathon Giftakis, Eric Panken
  • Publication number: 20060094973
    Abstract: Methods and devices for performing division approximation in implantable and wearable self-powered medical devices. The present invention provides rapid methods for performing an approximation of division on fixed point numbers, where the methods are easily implemented in small, low power consumption devices as may be found in implantable medical devices. One example of use is in rapidly determining the approximate ratio between foreground and background activity in seizure detection algorithms. Some methods approximate the ratio of Numerator (N) to Denominator (D) by raising 2 to the power of the difference in the number of zeros to the left of the Most Significant Set Bit (MSSB) of D vs. N. Some methods may also pad bits to the right of the approximate ratio MSSB using bits from the right of the N MSSB, and/or pre-process the smaller of D or N by rounding the value upward. Methods may be implemented in firmware and/or in discrete logic.
    Type: Application
    Filed: October 29, 2004
    Publication date: May 4, 2006
    Inventor: Touby Drew
  • Publication number: 20060094970
    Abstract: Methods and apparatus for storing data records associated with a medical monitoring event in a data structure. An implanted device obtains data and stores the data in the data record in a first data structure that is age-based. Before an oldest data record is lost, the oldest data record may be stored in a second data structure that is priority index-based. The priority index may be determined by a severity level and may be further determined by associated factors. The implanted device may organize, off-load, report, and/or display a plurality of data records based on an associated priority index. Additionally, the implanted device may select a subset or composite of physiologic channels from the available physiologic channels based on a selection criterion.
    Type: Application
    Filed: November 2, 2005
    Publication date: May 4, 2006
    Applicant: Medtronic, Inc.
    Inventor: Touby Drew
  • Publication number: 20060095092
    Abstract: Methods and apparatus for storing data records associated with a medical monitoring event in a data structure. An implanted device obtains data and stores the data in the data record in a first data structure that is age-based. Before an oldest data record is lost, the oldest data record may be stored in a second data structure that is priority index-based. The priority index may be determined by a severity level and may be further determined by associated factors. The implanted device may organize, off-load, report, and/or display a plurality of data records based on an associated priority index. Additionally, the implanted device may select a subset or composite of physiologic channels from the available physiologic channels based on a selection criterion.
    Type: Application
    Filed: November 2, 2005
    Publication date: May 4, 2006
    Applicant: Medtronic, Inc.
    Inventor: Touby Drew
  • Publication number: 20060095091
    Abstract: An apparatus for storing data records associated with a medical monitoring event in a data structure. An implanted device obtains data and stores the data in the data record in a first data structure that is age-based. Before an oldest data record is lost, the oldest data record may be stored in a second data structure that is priority index-based. The priority index may be determined by a severity level and may be further determined by associated factors. The implanted device may organize, off-load, report, and/or display a plurality of data records based on an associated priority index. Additionally, the implanted device may select a subset or composite of physiologic channels from the available physiologic channels based on a selection criterion.
    Type: Application
    Filed: November 2, 2005
    Publication date: May 4, 2006
    Applicant: Medtronic, Inc.
    Inventor: Touby Drew
  • Publication number: 20060094972
    Abstract: Apparatus for storing data records associated with a medical monitoring event in a data structure. Upon indication by a patient of a possible manifestation of a neurological event, the implanted device obtains and stores data in the data record in a first data structure that is age-based. Before an oldest data record is lost, the oldest data record may be stored in a second data structure that is priority index-based. The priority index may be determined by a severity level and may be further determined by associated factors. The implanted device may organize, off-load, report, and/or display a plurality of data records based on an associated priority index. Additionally, the implanted device may select a subset or composite of physiologic channels from the available physiologic channels based on a selection criterion.
    Type: Application
    Filed: November 2, 2005
    Publication date: May 4, 2006
    Applicant: Medtronic, Inc.
    Inventor: Touby Drew
  • Publication number: 20060094971
    Abstract: Methods and apparatus for storing data records associated with a medical monitoring event in a data structure. Upon detection of a possible occurrence of a physiological event by one group of monitoring elements, an implanted device records data received from another group of monitoring elements. The implanted device obtains and stores the data in the data record in a first data structure that is age-based. Before an oldest data record is lost, the oldest data record may be stored in a second data structure that is priority index-based. The priority index may be determined by a severity level and may be further determined by associated factors. The implanted device may organize, off-load, report, and/or display a plurality of data records based on an associated priority index. Additionally, the implanted device may select a subset or composite of physiologic channels from the available physiologic channels based on a selection criterion.
    Type: Application
    Filed: November 2, 2005
    Publication date: May 4, 2006
    Applicant: Medtronic, Inc.
    Inventor: Touby Drew