WO2004075928A3 - System and method for measuring cross-sectional areas and pressure gradients in luminal organs - Google Patents

System and method for measuring cross-sectional areas and pressure gradients in luminal organs Download PDF

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Publication number
WO2004075928A3
WO2004075928A3 PCT/US2004/004828 US2004004828W WO2004075928A3 WO 2004075928 A3 WO2004075928 A3 WO 2004075928A3 US 2004004828 W US2004004828 W US 2004004828W WO 2004075928 A3 WO2004075928 A3 WO 2004075928A3
Authority
WO
WIPO (PCT)
Prior art keywords
catheter
targeted site
sectional areas
pressure gradients
cross
Prior art date
Application number
PCT/US2004/004828
Other languages
French (fr)
Other versions
WO2004075928A2 (en
WO2004075928A9 (en
Inventor
Ghassan S Kassab
Hans Gregersen
Mohamed Reza Movahed
Original Assignee
Electro Cat Llc
Ghassan S Kassab
Hans Gregersen
Mohamed Reza Movahed
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electro Cat Llc, Ghassan S Kassab, Hans Gregersen, Mohamed Reza Movahed filed Critical Electro Cat Llc
Priority to CA2516559A priority Critical patent/CA2516559C/en
Priority to EP04712383.1A priority patent/EP1599232B1/en
Priority to NZ541889A priority patent/NZ541889A/en
Priority to JP2006503684A priority patent/JP4887138B2/en
Priority to AU2004216229A priority patent/AU2004216229B2/en
Publication of WO2004075928A2 publication Critical patent/WO2004075928A2/en
Publication of WO2004075928A9 publication Critical patent/WO2004075928A9/en
Publication of WO2004075928A3 publication Critical patent/WO2004075928A3/en
Priority to AU2010241404A priority patent/AU2010241404B2/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0538—Measuring electrical impedance or conductance of a portion of the body invasively, e.g. using a catheter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/03—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs
    • A61B5/036—Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs by means introduced into body tracts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
    • A61B5/1076—Measuring physical dimensions, e.g. size of the entire body or parts thereof for measuring dimensions inside body cavities, e.g. using catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7271—Specific aspects of physiological measurement analysis
    • A61B5/7278—Artificial waveform generation or derivation, e.g. synthesising signals from measured signals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00017—Electrical control of surgical instruments
    • A61B2017/00022—Sensing or detecting at the treatment site
    • A61B2017/00026—Conductivity or impedance, e.g. of tissue

Abstract

The invention comprises a system, catheter (20) and method for measuring the cross-sectional areas and pressure gradients in any hollow organ, such as, for example, blood vessels. One embodiment of such a system includes: an impedance catheter (20) capable of being introduced into a targeted site; a solution delivery source (106); a constant current source; a balloon inflation control device (105); and a data acquisition and processing system (100) that receives conductance and/or pressure gradient data from the catheter (20) and calculates the cross-sectional area of the targeted site. In one embodiment, the catheter (20) has an inflatable balloon along its longitudinal axis, thereby enabling the breakup of any materials causing stenosis at the targeted site and/or distention and delivery of an optional stent into the targeted site.
PCT/US2004/004828 2003-02-21 2004-02-18 System and method for measuring cross-sectional areas and pressure gradients in luminal organs WO2004075928A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA2516559A CA2516559C (en) 2003-02-21 2004-02-18 System and method for measuring cross-sectional areas and pressure gradients in luminal organs
EP04712383.1A EP1599232B1 (en) 2003-02-21 2004-02-18 System for measuring cross-sectional areas and pressure gradients in luminal organs
NZ541889A NZ541889A (en) 2003-02-21 2004-02-18 System and method for measuring cross-sectional areas and pressure gradients in luminal organs
JP2006503684A JP4887138B2 (en) 2003-02-21 2004-02-18 System and method for measuring cross-sectional area and pressure gradient of an organ having a lumen
AU2004216229A AU2004216229B2 (en) 2003-02-21 2004-02-18 System and method for measuring cross-sectional areas and pressure gradients in luminal organs
AU2010241404A AU2010241404B2 (en) 2003-02-21 2010-11-12 System and method for measuring cross-sectional areas and pressure gradients in luminal organs

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US44926603P 2003-02-21 2003-02-21
US60/449,266 2003-02-21
US49314503P 2003-08-07 2003-08-07
US60/493,145 2003-08-07
US50213903P 2003-09-11 2003-09-11
US60/502,139 2003-09-11

Publications (3)

Publication Number Publication Date
WO2004075928A2 WO2004075928A2 (en) 2004-09-10
WO2004075928A9 WO2004075928A9 (en) 2004-10-28
WO2004075928A3 true WO2004075928A3 (en) 2005-09-01

Family

ID=32931326

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/004828 WO2004075928A2 (en) 2003-02-21 2004-02-18 System and method for measuring cross-sectional areas and pressure gradients in luminal organs

Country Status (7)

Country Link
US (6) US7454244B2 (en)
EP (1) EP1599232B1 (en)
JP (1) JP4887138B2 (en)
AU (2) AU2004216229B2 (en)
CA (1) CA2516559C (en)
NZ (2) NZ579430A (en)
WO (1) WO2004075928A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102946789A (en) * 2010-06-13 2013-02-27 安吉奥梅特里克斯公司 Diagnostic kit and method for measuring balloon dimension in vivo

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