Accession Number:

ADA235458

Title:

Experimental System for the Noninvasive Detection of Air Bubbles in Tissues

Descriptive Note:

Final rept. Mar 1987-Dec 1988

Corporate Author:

DAVID SARNOFF RESEARCH CENTER PRINCETON NJ

Personal Author(s):

• Paglione, Robert W.

Report Date:

1990-12-01

Pagination or Media Count:

11.0

Abstract:

The air-bubble detection systems was designed to detect the changes in the microwave absorption properties of tissues--these changes could be caused by the introduction of air bubbles due to exposure to high altitudes. The system basically transmits a low-level modulated microwave signal through the tissue and monitors the changes in the amplitude of the received signal. The output signal from the detection circuitry can be monitored using an oscilloscope or strip-chart recorder. The system is powered by or - 8V and 12V DC. The DC voltages are generated from the AC line using a standard ACDC supply and post- regulators. This assembly is housed in a separate enclosure that is electrically isolated from the microwave enclosure.

Descriptors:

• *BUBBLES
• DIRECT CURRENT
• EXPOSURE(GENERAL)
• AIR
• ELECTROMAGNETIC PROPERTIES
• VOLTAGE
• MICROWAVES
• ALTERNATING CURRENT
• SIGNALS
• HIGH ALTITUDE
• LOW LEVEL
• MONITORS
• ABSORPTION
• SUPPLIES
• MODULATION
• OUTPUT
• DETECTION

Subject Categories:

• Stress Physiology
• Biomedical Instrumentation and Bioengineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE