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1. (WO1998051210) EXTERNAL BLOOD PRESSURE SENSOR APPARATUS AND METHOD
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/051210 International Application No.: PCT/US1997/024075
Publication Date: 19.11.1998 International Filing Date: 22.12.1997
Chapter 2 Demand Filed: 30.11.1998
IPC:
A61B 5/0215 (2006.01) ,A61B 5/0456 (2006.01) ,A61M 1/10 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
5
Measuring for diagnostic purposes; Identification of persons
02
Measuring 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
021
Measuring pressure in heart or blood vessels
0215
by means inserted into the body
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
5
Measuring for diagnostic purposes; Identification of persons
04
Measuring bioelectric signals of the body or parts thereof
0402
Electrocardiography, i.e. ECG
0452
Detecting specific parameters of the electrocardiograph cycle
0456
Detecting R peaks, e.g. for synchronising diagnostic apparatus
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
M
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
1
Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
10
Blood pumps; Artificial hearts; Devices for mechanical circulatory assistance, e.g. intra-aortic balloon pumps
Applicants:
L.VAD TEHCNOLOGY, INC. [US/US]; 300 River Place Detroit, MI 48207, US
Inventors:
FREED, Paul, S.; US
KANTROWITZ, Adrian; US
Agent:
BASILE, Andrew, R.; Young & Basile, P.C. Suite 624 3001 West Big Beaver Road Troy, MI 48084-3107, US
Priority Data:
08/856,90415.05.1997US
Title (EN) EXTERNAL BLOOD PRESSURE SENSOR APPARATUS AND METHOD
(FR) APPAREIL EXTERIEUR DE MESURE DE LA PRESSION SANGUINE ET PROCEDE ASSOCIE
Abstract:
(EN) This invention is an apparatus and method for measuring the blood pressure of a patient with a permanent or temporary cardiac assist device throughout an entire cardiac cycle by partially filling the inflatable chamber (10) of the cardiac assist device operatively disposed with respect to an aorta with pressurized fluid, and using the partially filled chamber (10) as a transducer. An external pressure sensor (36) is located in a drive unit (18) connected to the inflatable chamber (10). The drive unit (18) controls, monitors, and stores the fluid pressure with respect to the inflatable chamber (10). When isolated from a pressurized fluid reservoir (30, 44) the pressure in the inflatable chamber (10) corresponds to the current blood pressure of the patient through the cardiac cycle. The inflatable chamber (10) is preferably defined by a flexible membrane.
(FR) L'invention porte sur un appareil et un procédé de mesure de la pression sanguine d'un patient à l'aide d'un dispositif permanent ou temporaire d'assistance cardiaque sur un cycle cardiaque complet. Le procédé consiste à remplir partiellement d'un fluide sous pression la chambre gonflable (10) du dispositif d'assistance cardiaque fonctionnellement disposée par rapport à l'aorte et à utiliser la chambre (10) partiellement remplie comme transducteur. Un capteur de pression extérieur (36) est placé dans une unité de commande (18) reliée à la chambre gonflable (10). Ladite commande règle, suit, et enregistre la pression du fluide dans la chambre gonflable (10). Si on l'isole du réservoir de fluide sous pression (30, 44), la pression de la chambre gonflable (10) correspond à la pression sanguine instantanée du patient pendant le cycle cardiaque. La chambre gonflable (10) est de préférence constituée par une membrane souple.
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP1058512JP2000513628 CA2289715AU1998057244