MICROWAVE DEVICE FOR DETECTING AIR EMBOLI

Award Information
Agency: Department of Health and Human Services
Branch: N/A
Contract: N/A
Agency Tracking Number: 16371
Amount: $500,000.00
Phase: Phase II
Program: SBIR
Awards Year: 1993
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Microwave Medical Systems, Inc
9 Goldsmith Street, Littleton, MA, 10460
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Grabowy, Richard S
 Principal Investigator
 (508) 486-3003
Business Contact
 1 R43 CA52345-01A2
Phone: () -
Research Institution
N/A
Abstract
ACCIDENTS INVOLVING THE INTRODUCTION OF AIR EMBOLI IN THE CORONARY OR CEREBRAL CIRCULATION PATHS THROUGH CARDIOTOMY OR PUMP OXYGENATOR PROCEDURES CAN RESULT IN DEVASTATING INJURY. WE WILL DEVELOP A NON-INVASIVE MECHANISM FOR QUICKLY AND ACCURATELY DETECTING THE PRESENCE OF AIR EMBOLI IN THE INFUSION PATH AND THUS HELP REDUCE THE RISK OF SUCH PROCEDURES. THE GOAL IS TO ADAPT AN EXISTING MICROWAVE RADIOMETRY SYSTEM WITH APPROPRIATE TARGET ANTENNAS TO "SEE" AIR EMBOLI TRAVELING THROUGH PLASTIC OR GLASS TUBING USED TO DELIVER FLUID/BLOOD TO A PATIENT. THIS RADIOMETRIC TECHNIQUE MONITORS THE NOISE LEVEL EMITTED BY FLUID FLOWING THROUGH A TRANSDUCER CONTAINING A MICROWAVE ANTENNA. SINCE THE NOISE LEVEL OF THE TARGET IS A FUNCTION OF ITS DIELECTRIC PROPERTIES, THIS SYSTEM WILL IN EFFECT MONITOR THE FLUID-TO-AIR RATIO OF THE MEDIA WITHIN THE BORESIGHT OF THE ANTENNA. USING THIS PRINCIPLE, TRANSDUCERS AND ASSOCIATED CIRCUITRY WILL BE DEVELOPED TO OPTIMALLY DETECT THE PRESENCE OF EVEN VERY SMALL AIR EMBOLI WITHIN INFUSION LINES. THE SENSITIVITY AND SPECIFICITY OF THE SYSTEM WILL BE DETERMINED AS RELATED TO PARAMETERS SUCH AS TUBING SIZE, FLUID TYPE, FLUID FLOW RATE, FLUID LINE PRESSURE, FLUID TEMPERATURE AND AIR BUBBLE SIZE.

* information listed above is at the time of submission.

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