Charles F Chesney

US Patent:

6544188, Apr 8, 2003

Filed:

Aug 26, 1999

Appl. No.:

09/383783

Inventors:

Charles F. Chesney - Sunfish Lake MN
Bernard M. Graham - Maple Grove MN
E. Paul Maloney - Stillwater MN
Dennis J. Morgan - Crystal MN
Andrew L. Von Duyke - Minnetonka MN

Assignee:

Hypertension Diagnostics, Inc. - Eagan MN

International Classification:

A61B 504

US Classification:

600500, 600503

Abstract:

A method and a sensor holding and positioning device. In one embodiment, the device includes a sensor base having two feet, the base forming a raised bridge between the two feet. The bridge has one or more cross members spanning all or part of the space between the two feet. A sensor suspension including a sensor holder and sensor-height-adjustment mechanism is coupled by a pivot-arm axle to the sensor base, such that the sensor suspension is able to rotate in an arc about the long axis of the axle. In one such embodiment, the device further includes a pressure sensor attached to the sensor holder of the sensor suspension. In another such embodiment, the sensor suspension is able to slide back and forth along a line parallel to the long axis of the axle. Another aspect is a method for positioning a sensor over the radial artery, for example in a humans wrist. Yet another aspect is a pulse-waveform acquisition system.

US Patent:

6585659, Jul 1, 2003

Filed:

Oct 20, 2000

Appl. No.:

09/693460

Inventors:

Charles F. Chesney - Sunfish Lake MN
Michael Terry Riggs - Batavia NY
Charles A. Lemaire - Apple Valley MN

Assignee:

Hypertension Diagnostics, Inc. - Eagan MN

International Classification:

A61B 800

US Classification:

600485, 600500

Abstract:

A method and an apparatus for fabricating a pressure-waveform sensor with a leveling support element. One embodiment provides a pressure-waveform sensor having a housing, a support element, and a piezoelectric element having a first end secured between the support element and the housing, and a second end in a cantilevered orientation. The support element and the piezoelectric element together form a plurality of support regions to level the piezoelectric element and relative to the housing. In some embodiments, the support element includes a ring having three slots spaced apart on one face of the ring, or one or more support regions formed with a shim having a thickness equal to a thickness of the piezoelectric device, or support regions that are integral to the support element. Another aspect provides a method for fabricating a pressure-waveform sensor. The method includes the steps of forming a housing structure with an inner lip, and supporting a cantilevered piezoelectric element with a support structure such that contact is made with the inner lip at a plurality of points in order to level the piezoelectric element relative to the inner lip.

US Patent:

6623434, Sep 23, 2003

Filed:

Sep 17, 2001

Appl. No.:

09/954673

Inventors:

Charles F. Chesney - Sunfish Lake MN
Stanley M. Finkelstein - St. Louis Park MN
Jay N. Cohn - Minneapolis MN

Assignee:

Hypertension Diagnostics, Inc. - Eagan MN

International Classification:

A61B 5021

US Classification:

600485, 600481

Abstract:

A vascular impedance measurement instrument includes a transducer to obtain a digitized arterial blood pressure waveform. The digitized data is used to determine cardiac output, and to subsequently obtain measurements of impedance parameters using the modified Windkessel model of the arterial system. The instrument is used as an aid in diagnosing, treating and monitoring patients with cardiovascular disease.

US Patent:

6629343, Oct 7, 2003

Filed:

Oct 20, 2000

Appl. No.:

09/693458

Inventors:

Charles F. Chesney - Sunfish Lake MN
Michael Terry Riggs - Batavia NY
Charles A. Lemaire - Apple Valley MN

Assignee:

Hypertension Diagnostics, Inc. - Eagan MN

International Classification:

H04R 1700

US Classification:

29 2535, 29594, 29832, 310348, 310352, 310353

Abstract:

A method for fabricating a pressure-waveform sensor with a leveling support element. One embodiment provides a pressure-waveform sensor having a housing, a support element, and a piezoelectric element having a first end secured between the support element and the housing, and a second end in a cantilevered orientation. The support element and the piezoelectric element together form a plurality of support regions to level the piezoelectric element and relative to the housing. In some embodiments, the support element includes a ring having three slots spaced apart on one face of the ring, or one or more support regions formed with a shim having a thickness equal to a thickness of the piezoelectric device, or support regions that are integral to the support element. Another aspect provides a method for fabricating a pressure-waveform sensor. The method includes the steps of forming a housing structure with an inner lip, and supporting a cantilevered piezoelectric element with a support structure such that contact is made with the inner lip at a plurality of points in order to level the piezoelectric element relative to the inner lip.

US Patent:

20030093301, May 15, 2003

Filed:

Nov 13, 2001

Appl. No.:

10/008782

Inventors:

Charles Chesney - Sunfish Lake MN, US
Kevin Petrucelli - Maplewood MN, US

Assignee:

Hypertension Diagnostics, Inc.

International Classification:

G06F017/60

US Classification:

705/003000

Abstract:

Method and apparatus for acquiring and analyzing signals to generate medical data pertinent to one or more individuals and storing the data in a local machine, then collecting the medical data to a centralized system for further analysis and/or creation of invoices for billing. Some embodiments include a medical-data collection apparatus for processing an arterial blood pressure waveform to extract clinically useful information on the state of the cardiovascular system of an individual. After storing medical data for one or more individuals, the medical-data collection apparatus establishes communications with a centralized information-processing system, uploads its data, and is re-enabled to collect further data. The information-processing system optionally generates bills or invoices for the services based on usage of each of the medical-data collection apparatus, and optionally aggregates the data from a plurality of individuals for further analysis.

US Patent:

61323837, Oct 17, 2000

Filed:

Mar 20, 1998

Appl. No.:

9/045449

Inventors:

Charles F. Chesney - Sunfish Lake MN
Bernard M. Graham - Maple Grove MN
E. Paul Maloney - Stillwater MN
Dennis J. Morgan - Crystal MN
Andrew L. Von Duyke - Minnetonka MN

Assignee:

Hypertension Diagnostics, Inc. - Eagan MN

International Classification:

A61B 502

US Classification:

600502

Abstract:

A sensor holding and positioning device. In one embodiment, the device includes a sensor base having two feet, the base forming a raised bridge between the two feet. The bridge has one or more cross members spanning all or part of the space between the two feet. A sensor suspension including a sensor holder and sensor-height-adjustment mechanism is coupled by a pivot-arm axle to the sensor base, such that the sensor suspension is able to rotate in an arc about the long axis of the axle. In one such embodiment, the device further includes a pressure sensor attached to the sensor holder of the sensor suspension. In another such embodiment, the sensor suspension is able to slide back and forth along a line parallel to the long axis of the axle. Another aspect is for positioning the sensor over the radial artery, for example in a human's wrist. Yet another aspect is a pulse-waveform acquisition system.

US Patent:

60483180, Apr 11, 2000

Filed:

Jan 26, 1999

Appl. No.:

9/237444

Inventors:

Charles F. Chesney - Sunfish Lake MN
Stanley M. Finkelstein - St. Louis Park MN
Jay N. Cohn - Minneapolis MN

Assignee:

Hypertension Diagnostic, Inc. - Eagan MN

International Classification:

A61B 5021

US Classification:

600483

Abstract:

A vascular impedance measurement instrument includes a transducer to obtain a digitized arterial blood pressure waveform. The digitized data is used to determine cardiac output, and to subsequently obtain measurements of impedance parameters using the modified Windkessel model of the arterial system. The instrument is used as an aid in diagnosing, treating and monitoring patients with cardiovascular disease.

US Patent:

53160045, May 31, 1994

Filed:

Mar 26, 1993

Appl. No.:

8/038357

Inventors:

Charles F. Chesney - Sunfish Lake MN
Stanley M. Finkelstein - St. Louis Park MN
Jay N. Cohn - Minneapolis MN

Assignee:

Regents of the University of Minnesota - Minneapolis MN

International Classification:

A61B 5021

US Classification:

128672

Abstract:

A vascular impedance measurement instrument includes a transducer to obtain a digitized arterial blood pressure waveform. The digitized data is used to determine cardiac output, and to subsequently obtain measurements of impedance parameters using the modified Windkessel model of the arterial system. The instrument is used as an aid in diagnosing, treating and monitoring patients with cardiovascular disease.