Patents by Inventor Gary M. Drzewiecki
Gary M. Drzewiecki 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).
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Patent number: 6626840Abstract: A method and system are provided for detecting various vascular conditions using an occlusive arm cuff plethysmograph. The system includes data acquisition hardware, including the occlusive arm cuff plethysmograph, for obtaining arterial and endothelial function data from a patient, processing means utilizing application or analysis software for analyzing the arterial and endothelial function data, and a database of computer models, such as brachial artery pressure versus lumen area curves (P-A curves) and brachial artery pressure versus compliance curves (P-C curves), developed by analyzing data for a plurality of subjects where their vascular conditions were known. The processing means diagnoses and predicts various vascular conditions pertaining to the patient by comparing or correlating the analyzed arterial and endothelial function data with the computer models stored within the database and presents the findings on a display.Type: GrantFiled: October 29, 2001Date of Patent: September 30, 2003Assignee: Rutgers, The State University of New JerseyInventors: Gary M. Drzewiecki, Robert B. Drzewiecki
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Publication number: 20020111554Abstract: A method and system are provided for detecting various vascular conditions using an occlusive arm cuff plethysmograph. The system includes data acquisition hardware, including the occlusive arm cuff plethysmograph, for obtaining arterial and endothelial function data from a patient, processing means utilizing application or analysis software for analyzing the arterial and endothelial function data, and a database of computer models, such as brachial artery pressure versus lumen area curves (P-A curves) and brachial artery pressure versus compliance curves (P-C curves), developed by analyzing data for a plurality of subjects where their vascular conditions were known. The processing means diagnoses and predicts various vascular conditions pertaining to the patient by comparing or correlating the analyzed arterial and endothelial function data with the computer models stored within the database and presents the findings on a display.Type: ApplicationFiled: October 29, 2001Publication date: August 15, 2002Inventors: Gary M. Drzewiecki, Robert B. Drzewiecki
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Patent number: 6338719Abstract: A method and system are provided for detecting various vascular conditions using an occlusive arm cuff plethysmograph. The system includes data acquisition hardware, including the occlusive arm cuff plethysmograph, for obtaining arterial and endothelial function data from a patient, processing means utilizing application or analysis software for analyzing the arterial and endothelial function data, and a database of computer models, such as brachial artery pressure versus lumen area curves (P-A curves) and brachial artery pressure versus compliance curves (P-C curves), developed by analyzing data for a plurality of subjects where their vascular conditions were known. The processing means diagnoses and predicts various vascular conditions pertaining to the patient by comparing or correlating the analyzed arterial and endothelial function data with the computer models stored within the database and presents the findings on a display.Type: GrantFiled: June 12, 2000Date of Patent: January 15, 2002Assignee: Rutgers, The State University of New JerseyInventors: Gary M. Drzewiecki, Robert B. Drzewiecki
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Patent number: 6309359Abstract: An occlusive cuff is placed around a limb (e.g. an arm) of a patient. A fluid, such as air, is pumped into the cuff, and the pressure in the cuff is measured. The pressure variation in the cuff with respect to time is caused by the pump and expansion/contraction of the arm caused by blood being pumped therethrough by the patient's heart. This variation in pressure is used to calculate systolic and diastolic pressure, artery lumen area compliance and artery volume compliance, artery lumen area, and the blood flow rate through the patient's arteries (e.g. the brachial artery for the case of the patient's arm, or the femoral artery or the case of the patient's leg).Type: GrantFiled: December 3, 1998Date of Patent: October 30, 2001Inventors: Michael D. Whitt, Gary M. Drzewiecki, James J. Pilla
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Patent number: 5605156Abstract: A pressure waveform monitor for non-invasively monitoring the pressure waveform inside a vessel, such as an artery, includes a flexible diaphragm extended across an opening of a container containing a fluid. The flexible diaphragm is placed against tissue surrounding an artery such that arterial pressure causes a deflection in the diaphragm. A deflection in the diaphragm causes the fluid to be redistributed throughout the container which is effectively divided into an array of volume compartments. The relative volume distribution is determined through impedance plethysmography. The diaphragm is maintained in a calibrated position by maintaining the array of volume compartments at relatively unchanged volumes. When the relative volumes remain essentially unchanged, calibrated tonometry is possible. The pressure within the container is then used to determine the pulse waveform and the pressure within the artery.Type: GrantFiled: May 16, 1995Date of Patent: February 25, 1997Assignee: Rutgers UniversityInventors: Gary M. Drzewiecki, Robert D. Butterfield
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Patent number: 5439001Abstract: A pressure waveform monitor for non-invasively monitoring the pressure waveform inside a vessel, such as an artery, includes a flexible diaphragm extended across an opening of a container containing a fluid. The flexible diaphragm is placed against tissue surrounding an artery such that arterial pressure causes a deflection in the diaphragm. A deflection in the diaphragm causes the fluid to be redistributed throughout the container which is effectively divided into an array of volume compartments. The relative volume distribution is determined through impedance plethysmography. The diaphragm is maintained in a calibrated position by maintaining the array of volume compartments at relatively unchanged volumes. When the relative volumes remain essentially unchanged, calibrated tonometry is possible. The pressure within the container is then used to determine the pulse waveform and the pressure within the artery.Type: GrantFiled: November 17, 1993Date of Patent: August 8, 1995Assignee: IVAC CorporationInventors: Robert D. Butterfield, Gary M. Drzewiecki
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Patent number: 5363855Abstract: A pressure waveform monitor noninvasively monitors the pressure waveform in an underlying vessel such as an artery. The apparatus comprises at least one continuous, relatively thin and narrow diaphragm mounted in a housing to be placed on the tissue overlying the vessel of interest. The diaphragm is longer than the diameter of the vessel for purposely monitoring pressure in the tissue adjacent the vessel of interest. The tonometer also comprises deformation sensor means for measuring deformation of the diaphragm both over the vessel and adjacent the vessel, and signal processing means for combining the waveform of the vessel as monitored by the part of the diaphragm over the vessel with the waveforms of adjacent tissue to accurately determine the actual pressure waveform in the vessel.Type: GrantFiled: August 25, 1992Date of Patent: November 15, 1994Assignee: Rutgers UniversityInventors: Gary M. Drzewiecki, Robert D. Butterfield, Edward J. Ciaccio
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Patent number: 5154680Abstract: A pressure waveform monitor noninvasively monitors the pressure waveform in an underlying vessel such as an artery. The apparatus comprises at least one/continuous, relatively thin and narrow diaphragm mounted in a housing to be placed on the tissue overlying the vessel of interest. The diaphragm is longer than the diameter of the vessel for purposely monitoring pressure in the tissue adjacent the vessel of interest. The tonometer also comprises deformation sensor means for measuring deformation of the diaphragm both over the vessel and adjacent the vessel, and signal processing means for combining the waveform of the vessel as monitored by the part of the diaphragm over the vessel with the waveforms of adjacent tissue to accurately determine the actual pressure waveform in the vessel.Type: GrantFiled: March 27, 1990Date of Patent: October 13, 1992Assignee: Rutgers UniversityInventors: Gary M. Drzewiecki, Robert D. Butterfield, Edward J. Ciaccio