Accession Number:

ADA275253

Title:

Remote Control of Transcranial Doppler (TCD) Probe During Centrifuge Exposures up to 9 +Gz

Descriptive Note:

Final rept. Oct 1987-Dec 1993

Corporate Author:

SOUTHEASTERN CENTER FOR ELECTRICAL ENGINEERING EDUCATION INC ST CLOUD FL

Report Date:

1994-01-01

Pagination or Media Count:

7.0

Abstract:

TCD systems have been successfully used in clinical practice for estimating cerebral perfusion by registering blood flow velocity in the middle cerebral artery. However, when used in centrifuges, probe movement during high Gz have resulted in the loss of Doppler signal making interpretations of data very difficult. To solve this problem, the Doppler probe and three electrical motors were mounted on a tightly fitted helmet. Remote control of these motors allows precise tilting and sliding of the probe during G exposures. Vertical movement of the probe is recorded when a good flow velocity signal is achieved. on succeeding G-exposures the probe is moved to the predicted positions for different G-loads when the G-load changes. A computer program to automate this process is currently under development. With this device, blood flow velocity in the middle cerebral artery can be registered at G-loads up to 9 Gz with increased accuracy. Transcranial doppler, Acceleration, Remote control, Helmet.

Subject Categories:

  • Acoustic Detection and Detectors
  • Mechanics
  • Protective Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE