Document Detail


Pulsed ultrasound and electrocortical activity in fetal sheep.
MedLine Citation:
PMID:  8143567     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of this study was to determine if low intensity ultrasound affects electrocortical activity in chronically instrumented fetal sheep. A 3.5-MHz transducer was attached to each fetal skull (n = 9) and activated periodically to emit pulses of 5.8 microseconds duration at a repetition rate of 2 kHz generating a power output of 60 mW. The power supply was activated in 30-s bursts every 180 s but random electronic switching energized the transducer with 50% of bursts. On average, 175 bursts of ultrasound were delivered to the fetus over 19.5 h. Blinded analysis of continuous recordings of electrocortical activity showed it to be unaffected by the ultrasound exposures. Therefore, it is unlikely that ultrasonic examination of human fetuses will affect normal cyclical electrocortical activity.
Authors:
P M Duggan; G C Liggins; S B Barnett
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Early human development     Volume:  35     ISSN:  0378-3782     ISO Abbreviation:  Early Hum. Dev.     Publication Date:  1993 Dec 
Date Detail:
Created Date:  1994-04-29     Completed Date:  1994-04-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7708381     Medline TA:  Early Hum Dev     Country:  IRELAND    
Other Details:
Languages:  eng     Pagination:  121-7     Citation Subset:  IM    
Affiliation:
Department of Obstetrics & Gynaecology, National Women's Hospital, Auckland, New Zealand.
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MeSH Terms
Descriptor/Qualifier:
Animals
Cerebral Cortex / embryology*,  physiology
Electroencephalography
Electrophysiology
Female
Sheep / embryology*
Ultrasonics*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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