Douglas K Medema

US Patent:

6400984, Jun 4, 2002

Filed:

Jun 9, 2000

Appl. No.:

09/590459

Inventors:

Douglas K. Medema - Everett WA

Assignee:

Medtronic Physio-Control Manufacturing Corp. - Redmond WA

International Classification:

A61N 139

US Classification:

607 8, 607 7

Abstract:

A method and apparatus that automatically detects whether a load connected to a defibrillator is a patient or a test device measures a load-dependent electrical parameter, such as impedance, by delivering to the load at least two small-amplitude signals, each having different frequencies. Because the impedance of a patient is complex, impedance measurements obtained from the small-amplitude signals delivered to the load will differ if the load is a patient. If the impedance measurements obtained from the small-amplitude signals are approximately equal, the load is determined to be a test device. In an alternative embodiment, a small signal impedance measurement may be compared with an impedance measurement obtained from application of a high-amplitude signal to the load. Differing measurements indicate that the load is a patient, while impedance measurements that are approximately equal indicate that the load is a test device. If the load is a test device, a defibrillator implementing the present device may selectively determine to not store data in a memory, which data is normally collected and stored by the defibrillator while connected to a patient.

US Patent:

6747556, Jun 8, 2004

Filed:

Jul 31, 2001

Appl. No.:

09/919783

Inventors:

Douglas K. Medema - Everett WA
William E. Saltzstein - Woodinville WA
Robert A. Niskanen - Seattle WA
Richard C. Nova - Kirkland WA

Assignee:

Medtronic Physio-Control Corp. - Redmond WA

International Classification:

G08B 108

US Classification:

34053912, 3405391, 34053913, 34028607, 340 71

Abstract:

The invention provides a wireless automatic location identification (ALI) capable system ( ), including a medical device ( ) having a wireless data communicator ( ), a wireless communication network ( ), and a remote locating service ( ) for remotely locating and monitoring one or more medical devices over the wireless communication network. When the medical device is linked to the remote locating service over the communication network, the ALI-capable system identifies the location of the medical device and relays the location information to the remote locating service. The system permits reliable determination of the location of the medical device wherever the medical device is situated. The medical device may further be configured to transmit signals indicative of its status, condition, or self-test results, to the remote locating service. This feature allows the remote locating service to centrally monitor the status or condition of a plurality of medical devices.

US Patent:

6937150, Aug 30, 2005

Filed:

Dec 31, 2003

Appl. No.:

10/749573

Inventors:

Douglas K. Medema - Everett WA, US
William E. Saltzstein - Woodinville WA, US
Robert A. Niskanen - Seattle WA, US
Richard C. Nova - Kirkland WA, US

Assignee:

Medtronic Physio-Control Manufacturing Corp. - Redmond MA

International Classification:

G08B001/08

US Classification:

34053912, 3405391, 34053913, 34028607, 340 71

Abstract:

The invention provides a wireless automatic location identification (ALI) capable system (), including a medical device () having a wireless data communicator (), a wireless communication network (), and a remote locating service () for remotely locating and monitoring one or more medical devices over the wireless communication network. When the medical device is linked to the remote locating service over the communication network, the ALI-capable system identifies the location of the medical device and relays the location information to the remote locating service. The system permits reliable determination of the location of the medical device wherever the medical device is situated. The medical device may further be configured to transmit signals indicative of its status, condition, or self-test results, to the remote locating service. This feature allows the remote locating service to centrally monitor the status or condition of a plurality of medical devices.

US Patent:

7289029, Oct 30, 2007

Filed:

Dec 31, 2002

Appl. No.:

10/335542

Inventors:

Douglas K. Medema - Everett WA, US
Daniel W. Piraino - Seattle WA, US
Richard E Kunz - Seattle WA, US
Richard C. Nova - Kirkland WA, US
Cynthia P. Jayne - Redmond WA, US

Assignee:

MedTronic Physio-Control Corp. - Redmond WA

International Classification:

G08B 23/00

US Classification:

3405731, 34053918, 607 5

Abstract:

Techniques for initiating direct communication between an emergency medical device, such as an automated external defibrillator (AED) and a safety agency may include detecting an event and contacting the safety agency in response to the detected event and user authorization. For example, the AED may detect an event such as removal of the AED from a mount and alert an operator of the intent to send contact the safety agency. The AED determines whether an override command was received from the operator in a defined amount of time. When the operator does not input an override command, the AED interprets the absence of the override command as user authorization and contacts the safety agency via a communication unit. For instance, the AED may generate an advisory and send the advisory to the safety agency. The initiation of direct communication between the AED and the safety agency by the AED enables the operator to interact with a patient, e. g.

US Patent:

62175254, Apr 17, 2001

Filed:

Jan 13, 1999

Appl. No.:

9/229977

Inventors:

Douglas K. Medema - Everett WA
Tae H. Joo - Redmond WA
Paul W. Schmitt - Woodinville WA
David R. Hampton - Woodinville WA
Robert A. Niskanen - Seattle WA

Assignee:

Medtronic Physio-Control Manufacturing Corp. - Redmond WA

International Classification:

A61B 50402

US Classification:

600508

Abstract:

A reduced lead set device (10) that detects and reports the presence of an acute cardiac ischemic condition in a patient includes a reduced set of sensing electrodes (12, 14, 16, 18, and 20) placed on a patient for acquiring ECG data from the patient. The reduced lead set device evaluates the ECG data on a reduced set of leads by analyzing local features and/or global features of the ECG data. Local features may include local morphological measures such as ST elevation and clinical information on the patient such as age and sex. Global features include projection coefficients calculated from projecting a concatenated vector of heartbeat data onto separate sets of basis vectors that define signal subspaces of ischemic and non-ischemic ECGs. One or more classifiers evaluate the local features and/or global features to determine whether an acute cardiac ischemic condition is detected. The operating point, i. e.

US Patent:

61337870, Oct 17, 2000

Filed:

May 6, 1999

Appl. No.:

9/306644

Inventors:

Daniel Yerkovich - Seattle WA
Douglas K. Medema - Everett WA
Randall J. Makela - Kirkland WA

Assignee:

Physio-Control Manufacturing Corporation - Redmond WA

International Classification:

H03F 100

US Classification:

330 68

Abstract:

A method and apparatus for controlling the common mode impedance misbalance of an isolated single-ended circuit for all common mode paths, thereby allowing the balancing of the common mode impedances which reduces common mode effects while maintaining the advantages of the single-ended amplifier including circuit simplicity and the reference input connected to circuit ground. In one embodiment, two solid shields enclose the circuit as completely as possible with the inner shield connected to circuit ground which is also the reference for all other inputs to the circuit. A discrete capacitor is connected between the outer shield and each of the non-reference inputs. When the shield is complete, i. e. , solid, almost solid with minimal holes or a fine mesh, the value of the discrete capacitor is selected to match the parasitic capacitance formed between the outer shield and the inner shield. In another embodiment, the shield may be incomplete, i. e.

US Patent:

61712566, Jan 9, 2001

Filed:

Dec 11, 1998

Appl. No.:

9/209879

Inventors:

Tae H. Joo - Redmond WA
David R. Hampton - Woodinville WA
Paul W. Schmitt - Woodinville WA
Douglas K. Medema - Everett WA
Robert A. Niskanen - Seattle WA

Assignee:

Physio-Control Manufacturing Corporation - Redmond WA

International Classification:

A61B 50402

US Classification:

600508

Abstract:

A device (10) that detects and reports the presence of an acute cardiac ischemic condition in a patient includes sensing electrodes (12, 14, 16, 18, 20, 22, 24, 26, 28, and 30) placed on a patient for acquiring multiple (e. g. , twelve) lead ECG data from the patient. The device evaluates the acquired ECG data by analyzing global features derived from the ECG data. Global features include projection coefficients calculated from projecting a concatenated vector of representative heartbeat data onto sets of basis vectors that define an acute cardiac ischemic ECG subspace and a non-ischemic ECG subspace. A classifier evaluates the global features to determine whether an acute cardiac ischemic condition is detected. In a further embodiment of the invention, one or more classifiers evaluate local features, such as local morphological features and patient clinical information, in addition to the global features to determine whether an acute cardiac ischemic condition is detected. The device (10) may be configured with an adjustable sensitivity/specificity operating point.

US Patent:

20220241601, Aug 4, 2022

Filed:

Apr 13, 2022

Appl. No.:

17/720146

Inventors:

- Grand Cayman, KY
Steven E. Sjoquist - Lynnwood WA, US
Zoie R. Engman - Kirkland WA, US
Erick M. Roane - Bellevue WA, US
Laura M. Gustavson - Redmond WA, US
Douglas K. Medema - Everett WA, US
Garrett M. Kotlarchik - Kenmore WA, US
Pamela Breske - Newcastle WA, US
Jonathan P. Niegowski - Issaquah WA, US
Joseph L. Sullivan - Kirkland WA, US
Robert R. Buchanan - Bothell WA, US

Assignee:

West Affum Holdings Corp. - Grand Cayman

International Classification:

A61N 1/39
A61B 5/361
A61B 5/00
A61B 5/0205
A61B 5/366
A61B 5/363
A61B 5/01
A61B 5/1455
A61B 5/282

Abstract:

A wearable cardioverter defibrillator (WCD) system comprises a plurality of patient parameter electrodes and a plurality of defibrillator electrodes to contact a patient's skin when the WCD is delivering therapy to the patient, a processor to receive one or more patient parameters from the one or more patient parameter electrodes, an energy storage device to store a charge to provide electrical therapy to the patient via the plurality of defibrillator electrodes, and a non-invasive blood pressure (NIBP) monitor to obtain a blood pressure measurement of the patient and to provide the blood pressure measurement to the processor. The processor is to determine whether to provide electrical therapy to the patient based on the one or more patient parameters during an episode, and to obtain the blood pressure measurement from the NIBP monitor during the episode.