Implantable blood flow monitoring system

• US 7,200,431 B2
• Filed: 08/02/2002
• Issued: 04/03/2007
• Est. Priority Date: 04/05/2000
• Status: Expired due to Fees

• Current Assignee: Kenneth Lawrence Franco, Tofy V. Mussivand
• Original Assignee: Kenneth Lawrence Franco, Tofy V. Mussivand
• Inventors: Mussivand, Tofy V., Franco, Kenneth Lawrence
• Primary Examiner(s): Getzow; Scott M.
• Application Number:
  US10/211,605
• Publication Number:
  US 20020198459A1
• Time in Patent Office: 1,705 Days
• Field of Search: 600/526, 600/454, 600483-513, 128/903
• US Class Current: 600/513
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/352 Detecting R peaks, e.g. for synchronising diagnostic apparatus; Estimating R-R interval
• CPC Class Codes: A61B 8/06 Measuring blood flow measuring volume flow in general G01F, e.g. G01F1/66, G01F1/72; measuring speed of fluids in general G01P5/00
• CPC Class Codes: A61B 8/08 Detecting organic movements or changes, e.g. tumours, cysts, swellings A61B8/02 - A61B8/06 take precedence
• CPC Class Codes: A61B 8/4472 Wireless probes
• CPC Class Codes: A61B 8/543 involving acquisition triggered by a physiological signal
• CPC Class Codes: A61B 8/56 Details of data transmission or power supply

Abstract

An implantable blood flow monitoring system for providing synchronized blood vessel flow and myocardial wall contractility data to an external monitor independent of transcutaneous leads. Synchronized electrocardiogram data allows and provides comprehensive monitoring. A means is provided for transmitting synchronized cardiac function data and blood flow data to a distant remote location to facilitate continual physician monitoring.

Claims

1. An improved method of monitoring blood flow in coronary vessels and ventricular function with an implanted blood flow transit sensor and contractility piezoelectric crystal sensors having electrical leads extending external to a patient body and an external electrocardiogram for measuring a cardiac function signal wherein the improvement lies in:

communicating signals of the implanted blood flow transit sensor and at least two implanted piezoelectric crystal contractility sensors to an external monitor by an implanted radio frequency transceiver independent of transcutaneous leads.

2. The improved method of claim 1 further comprising synchronizing signals of at least two sensors associated with blood flow, contractility and cardiac function.

3. The improved method of claim 2 further comprising communicating the at least two synchronized sensor signals to a distant radio frequency receiver.

4. A method of screening drugs for vascular effects comprising:

implanting a blood flow monitoring system operating according to the method of claim 1;

collecting blood flow data from a patient independent of a drug;

collecting blood flow data from said patient in the presence of said drug; and

comparing blood flow data collected from said patient independent of said drug and blood flow data collected from said patient in the presence of said drug, for the purpose of screening drugs for vascular effects.

5. A method of determining the effects of activity on blood flow parameters comprising:

implanting a blood flow monitoring system operating according to the method of claim 1;

collecting blood flow data from a patient prior to an activity;

collecting blood flow data from said patient during or subsequent to said activity; and

comparing blood flow data collected from said patient prior to said activity and blood flow data collected from said patient during or subsequent to said activity, to determine the effects of activity on blood flow parameters.