Method and means for testing cellular tissues

• US 3,320,946 A
• Filed: 07/29/1963
• Issued: 05/23/1967
• Est. Priority Date: 07/30/1962
• Status: Expired due to Term

• Current Assignee: Christian Hennings, Heinz Ulrichs Carl, Jurgen Dethloff
• Original Assignee: Christian Hennings, Heinz Ulrichs Carl, Jurgen Dethloff
• Inventors: JURGEN DETHLOFF, Hennings, Christian, HEINZ ULRICHS CARL
• Application Number:
  US04/298,498
• Time in Patent Office: 1,394 Days
• US Class Current: 600/547
• CPC Class Codes: A61B 5/05 Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves impedance plethysmography A61B5/0295; measuring movement of the entire body or parts thereof A61B5/11; detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof A61B5/24
• CPC Class Codes: G01N 27/04 by investigating resistance
• CPC Class Codes: G01N 33/12 Meat; Fish
• CPC Class Codes: Y10S 99/11 Conductivity control

Claims

1. A METHOD FOR TESTING THE PHYSIOLOGICAL CONDITION OF VEGETABLE AND ANIMAL CELLULAR TISSUES HAVING A CELL WALL AND A CELL CONTENT AND HAVING AN EQUIVALENT CIRCUIT COMPRISING THE RESISTANCE OF THE INTERCELLULAR LIQUID CONNECTED IN SERIES TO A CLOSED LOOP COMPRISING THE SERIES CONNECTION OF THE RESISTANCE OF THE CELL CONTENT, THE RESISTANCE OF THE CELL WALL AND THE CAPACITANCE PRODUCED BY CURRENT FLOW DUE TO CHARGE BLOCKAGE ON THE CELL WALL, COMPRISING THE STEPS OF MEASURING THE IMPEDANCE OF AN OBJECT COMPRISING CELLULAR TISSUES TO BE TESTED AT AN A.C. HAVING A FIRST FREQUENCY APPLIED TO SAID OBJECT;

MEASURING THE IMPEDANCE OF SAID OBJECT AT AN A.C. HAVING A SECOND FREQUENCY DIFFERENT FROM SAID FIRST FREQUENCY APPLIED TO SAID OBJECT;

DIVIDING THE IMPEDANCE MEASUREMENT AT THE FIRST FREQUENCY BY THE IMPEDANCE MEASUREMENT AT THE SECOND FREQUENCY TO PROVIDE A RATIO WHICH IS PROPORTIONAL TO THE CELLULAR CONDITION OF SAID OBJECT AND THUS INDICATES THE SUITABILITY OF SAID OBJECT FOR HUMAN CONSUMPTION;

MEASURING A FIRST VOLTAGE EQUIVALENT TO SAID FIRST FREQUENCY A.C.;

MEASURING A SECOND VOLTAGE EQUIVALENT TO SAID SECOND FREQUENCY A.C.;

AND MAINTAINING CONSTANT ONE OF SAID FIRST AND SECOND VOLTAGES.