Method for detecting cardiovascular problems using micro or nano vibrations

• US 20070197927A1
• Filed: 12/20/2006
• Published: 08/23/2007
• Est. Priority Date: 12/22/2005
• Status: Abandoned Application

• Current Assignee: Physical Logic AG
• Original Assignee: Physical Logic AG
• Inventors: Ofek, Eran
• Application Number:
  US11/613,649
• Publication Number:
  US 20070197927A1
• Time in Patent Office: Days
• US Class Current: 600/514
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/11 Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb for measuring pulse A61B5/02 ;A61B5/1038 takes precedence; motion detection to correct for motion artifacts in physiological signals A61B5/721
• CPC Class Codes: A61B 5/1102 Ballistocardiography
• CPC Class Codes: A61B 5/6823 Trunk, e.g., chest, back, abdomen, hip

Abstract

A method and apparatus for characterizing cardiac function and detecting disorders thereof deploys a plurality of sensors on skin surface or close to it, to acquire data for detecting, locating, analyzing and displaying the time variant shifts in the local center of gravity of the heart tissues and fluids. The method deploys a sensor apparatus that is able to detect micro and/or nano vibrations arising from characteristic events in the cardiac cycle and/or movement of the heart tissue and fluids. The time variant shifts of the heart'"'"'s center of gravity may be displayed with other temporal measures of cardiac activity such an ECG to facilitate the detection and diagnosis of abnormalities, and/or confirm a diagnosis from the ECG.

Claims

1. A method for measuring the cardiac function of a patient, the method comprising the steps of:

a) placing a sensor for detecting vibrations on at least on of the patients'"'"' skin, close to the patients'"'"' skin, under the patients'"'"' skin and implanted within the patient,

b) receiving signals from said sensor,

c) filtering the signals to eliminate noise and amplify relevant information,

d) processing the signals to determine the mean displacement of the heart in three orthogonal directions as a function of time or heartbeat cycle process duration.

2. A method for measuring the cardiac function of a patient according to claim 1, the method further comprising the steps of:

a) placing at least one secondary sensor for detecting vibrations on the patients skin,

b) receiving signals from said sensors,

c) filtering the signals to eliminate noise and amplify relevant information,

d) processing the signals to determine the mean displacements in three orthogonal directions as a function of time or heartbeat cycle process duration.

3. A method for measuring the cardiac function of a patient according to claim 1, the method further comprising the steps of correlating the time and spatial location of the characteristic signals with a physical location within the heart.

4. A computer or other device readable medium having stored thereon a data structure comprising:

a) a first data field for storing the time of a cardiac event,

b) a second data field for storing the resolved spatial coordinates of the event for each record in the first data fields,

c) wherein the resolved spatial coordinates are relative to the center of gravity of the heart.

5. An apparatus for measuring the cardiac function of a patient, comprising

a) one or more sensors for detecting vibrations,

b) a signal processing and computational unit for receiving the output of said sensors, the computation unit being operative to:

i) receive signals from said one or more sensors,

ii) filter the signals to eliminate noise and amplify relevant data,

iii) process the filtered signals to detect characteristic signals, iv) store the time and spatial location of the characteristic signals in a data structure for further processing and display.

6. An apparatus for measuring the cardiac function of a patient according to claim 5 further operative to process the filtered signals in real-time.

7. An apparatus for measuring the cardiac function of a patient according to claim 5 portion operative to process the filtered signals in real time does not require storage.