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1. WO1996003914 - CALIBRATION OF SEGMENTAL BLOOD VOLUME CHANGES IN ARTERIES AND VEINS FOR PULSE VOLUME RECORDERS

Publication Number WO/1996/003914
Publication Date 15.02.1996
International Application No. PCT/US1995/009725
International Filing Date 02.08.1995
Chapter 2 Demand Filed 22.02.1996
IPC
A61B 5/022 2006.01
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Measuring for diagnostic purposes; Identification of persons
02Measuring 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; Heart catheters for measuring blood pressure
021Measuring pressure in heart or blood vessels
022by applying pressure to close blood vessels, e.g. against the skin; Ophthaldynamometers
CPC
A61B 2560/0223
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
2560Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
02Operational features
0223of calibration, e.g. protocols for calibrating sensors
A61B 5/02141
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Detecting, measuring or recording for diagnostic purposes
02Detecting, 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
021Measuring pressure in heart or blood vessels
02141Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits
A61B 5/022
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Detecting, measuring or recording for diagnostic purposes
02Detecting, 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
021Measuring pressure in heart or blood vessels
022by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
A61B 5/742
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
5Detecting, measuring or recording for diagnostic purposes
74Details of notification to user or communication with user or patient
742using visual displays
Applicants
  • VASOCOR, INC. [US/US]; 4001 N.W. 97th Avenue Miami, FL 33178, US
Inventors
  • RAINES, Jeffrey, K.; US
  • SNYDER, Leon, T.; US
  • HOFFMAN, John; US
Agents
  • KAIN, Robert, C., Jr. ; Suite 4600 200 South Biscayne Boulevard Miami, FL 33131-2310, US
Priority Data
08/285,90404.08.1994US
08/484,93307.06.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CALIBRATION OF SEGMENTAL BLOOD VOLUME CHANGES IN ARTERIES AND VEINS FOR PULSE VOLUME RECORDERS
(FR) ETALONNAGE DES VARIATIONS VOLUMIQUES DU SANG PAR SEGMENTS DANS LES ARTERES ET LE VEINES POUR LES ENREGISTREURS DE VOLUME IMPULSIONNELS
Abstract
(EN)
The calibration device includes a controllable pneumatic pump (44), a pressure sensor (48), a computerized device (72) for determining when a representative number of blood volume change signals are substantially similar and thereafter generating a calibration signal. The calibration system also includes a device which changes the volume in the closed peumatic system by a predetermined calibrated amount in the presence of the calibration trigger signal. This volume changing device may be a series of valves (V1, V2) coupled by a chamber (50) having a known volumetric size or a positive displacement pump driven by a stepper motor. The calibration system also includes a computerized device for correcting representative blood volume change signals based on the pressure signals at each discrete level of cuff pressure as corrected by the calibration signals represented by detected pressure signals obtained substantially simultaneously with the change of the volume at each discrete level of cuff pressure.
(FR)
Appareil d'étalonnage comprenant une pompe pneumatique réglable (44), un capteur de pression (48), un dispositif (72) commandé par ordinateur servant à déterminer quand un nombre représentatif de signaux de variation volumique du sang sont essentiellement similaires et à produire un signal d'étalonnage. Le système d'étalonnage comprend également un dispositif qui modifie le volume dans le système pneumatique fermé d'une quantité étalonnée, en présence du signal de déclenchement d'étalonnage. Ce dispositif modifiant le volume peut se composer d'une série de vannes (V1) (V2) couplées par une chambre (50) dont la taille volumétrique est connue ou une pompe à déplacement positif entraînée par un moteur pas à pas. Ce système d'étalonnage comprend aussi un dispositif commandé par ordinateur qui corrige les signaux représentatifs de variation volumique du sang en fonction des signaux de pression à chaque niveau discret de pression de manchon, selon la correction effectuée par les signaux d'étalonnage que représentent les signaux de pression détectés obtenus essentiellement simultanément à la variation du volume à chaque niveau discret de la pression de manchon.
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Latest bibliographic data on file with the International Bureau