Pulmonary Resistance
8-591

Jens G. Rosenkrantz, M. D., Childrens Hospital of Los
Angeles, Los Angeles, California

A system of programs which, adapted from DEC's Advanced
Signal Averager / allows accurate measurement of mean
pulmonary arterial flow and pressure, left atrial pressure and
intrapleural pressure. From these data, obtained by use of
appropriate electromagnetic flow and suitable pressure
transducers, the system calculates total and arteriolar resis-
tances and right ventricular work. This information, together
with the digitized average wave forms, is written on DECtape.

In addition, a program is included with the system, which
measures cardiac output on-line from an indicator dilution
curve by the Stewart-Hamiiton method.

The system is capable of interfacing with the Advanced
Averager, so that the options available in the signal averager
system are retained.

NOTE: The binary tapes available with this program are
those of the LAB-8 Advanced Averager

Minimum Hardware:
8K PDP-8/I; EAE; Disk or DECtape;
a second DECtape (for DECtape
systems) and LAB-8 peripherals
Other Programs Needed:
OS/8 or PS/8 Operating System
Source Language:
PAL-8

Catalog: July 1973