Accession Number:

AD0611130

Title:

GENERAL BIOPHYSICAL INVESTIGATIONS.

Descriptive Note:

Final rept.,

Corporate Author:

AMERICAN BIOPHYSICS RESEARCH LAB LANSDALE PA

Report Date:

1964-12-01

Pagination or Media Count:

42.0

Abstract:

An Intravascular Ultrasonic Blood Flow Catheter consisting of two electro-ceramic transducers mounted on a no. 9 French catheter was evaluated in vitro. Only extremely high or interrupted flow rates were detectable because of extraneous noise in the associated electronics. An Intravascular Oxygen Microelectrode Catheter consisting of a membrane covered oxygen electrode mounted on a no. 7 French catheter was evaluated in vitro and in vivo. The study showed that the use of these devices will eliminate the need for withdrawing discrete blood samples from the system while providing a continuous record of PO2 and pCO2 changes. An Intravascular Fiber Optics Pressure Transducer Catheter consisting of a miniature photostress pressure transducer and a fiber optical system mounted on a no. 9 French catheter was evaluated in vitro and in vivo. Its superiority over other methods currently available for flood pressure measurement has definitely been established. A hyperbaric physiological chamber was instrumented for obtaining EKG, respiration rate, temperature and blood pressure. The chamber was used for in vivo hyperbaric evaluations conducted with animals during this study. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE