CA2187638A1 - Apparatus and method for measuring an induced perturbation to determine physiological parameter - Google Patents

Apparatus and method for measuring an induced perturbation to determine physiological parameter

Info

Publication number
CA2187638A1
CA2187638A1 CA2187638A CA2187638A CA2187638A1 CA 2187638 A1 CA2187638 A1 CA 2187638A1 CA 2187638 A CA2187638 A CA 2187638A CA 2187638 A CA2187638 A CA 2187638A CA 2187638 A1 CA2187638 A1 CA 2187638A1
Authority
CA
Canada
Prior art keywords
patient
physiological parameter
noninvasive sensor
sensor signal
calibration measurement
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2187638A
Other languages
French (fr)
Other versions
CA2187638C (en
Inventor
Richard G. Caro
Mark H. Sher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Masimo Corp
Original Assignee
Richard G. Caro
Mark H. Sher
Vital Insite, Inc.
Masimo Corporation
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 Richard G. Caro, Mark H. Sher, Vital Insite, Inc., Masimo Corporation filed Critical Richard G. Caro
Publication of CA2187638A1 publication Critical patent/CA2187638A1/en
Application granted granted Critical
Publication of CA2187638C publication Critical patent/CA2187638C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—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
    • A61B5/02108—Measuring pressure in heart or blood vessels from analysis of pulse wave characteristics
    • 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
    • A61B5/02133—Measuring pressure in heart or blood vessels by using induced vibration of the blood vessel
    • 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
    • A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers

Abstract

A monitor for continuously determining a patient's physiological parameter includes a means for obtaining a periodic calibration measurement of the patient's physiological parameter. An exciter, positioned over an artery of the patient induces an exciter waveform into the patient's arterial blood. A noninvasive sensor, positioned over the artery, senses a hemoparameter and provides a noninvasive sensor signal output representative of the hemoparameter. A processor receives the calibration measurement and noninvasive sensor signal output. The processor determines a DC offset based on the calibration measurement and processes the noninvasive sensor signal to continuously determine the patient's physiological parameter. A method includes steps for performing the present invention. In the preferred embodiment, the physiological parameter measured is blood pressure, however, the present invention can also be used to analyze and track other physiological parameters such as vascular wall compliance, strength of ventricular contractions, vascular resistance, fluid volume, cardiac output, myocardial contractility and other related parameters.
CA002187638A 1994-04-15 1995-04-03 Apparatus and method for measuring an induced perturbation to determine physiological parameter Expired - Fee Related CA2187638C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/228,213 1994-04-15
US08/228,213 US5590649A (en) 1994-04-15 1994-04-15 Apparatus and method for measuring an induced perturbation to determine blood pressure
PCT/US1995/004124 WO1995028126A1 (en) 1994-04-15 1995-04-03 Apparatus and method for measuring an induced perturbation to determine blood pressure

Publications (2)

Publication Number Publication Date
CA2187638A1 true CA2187638A1 (en) 1995-10-26
CA2187638C CA2187638C (en) 2000-02-29

Family

ID=22856272

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002187638A Expired - Fee Related CA2187638C (en) 1994-04-15 1995-04-03 Apparatus and method for measuring an induced perturbation to determine physiological parameter

Country Status (7)

Country Link
US (3) US5590649A (en)
EP (1) EP0755221B1 (en)
JP (1) JP2831471B2 (en)
AU (1) AU2238495A (en)
CA (1) CA2187638C (en)
DE (1) DE69523150T2 (en)
WO (1) WO1995028126A1 (en)

Cited By (2)

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US6371921B1 (en) 1994-04-15 2002-04-16 Masimo Corporation System and method of determining whether to recalibrate a blood pressure monitor
US6632181B2 (en) 1996-06-26 2003-10-14 Masimo Corporation Rapid non-invasive blood pressure measuring device

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US5590649A (en) 1997-01-07
US5830131A (en) 1998-11-03
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