Fetal Doppler: how to keep it safe?

Fetal Doppler: how to keep it safe?

MedLine Citation:	PMID: 21048451 Owner: NLM Status: In-Process
Abstract/OtherAbstract:	Ultrasound's record of safety seems to be perfect, with no undisputed reports of adverse effects in humans. However, all epidemiologic studies published so far are based on information obtained with pre-1992 machines, when allowed maximal in-situ intensity for fetal use was increased. Many fetuses are examined very early in pregnancy, a time of greater vulnerability. Doppler can generate much higher level of acoustic energy than B-mode. The thermal index and the mechanical index are indicators of the 2 main potential effects of ultrasound including Doppler. To keep the fetus safe, knowledge of these potential bioeffects is mandatory as is understanding of how instrument controls alter the output. The 2 most important rules are: keep thermal index below 1 and use the lowest possible output for the shortest possible time compatible with obtaining diagnostic information.

Authors:	Jacques S Abramowicz
Publication Detail:	Type: Journal Article
Journal Detail:	Title: Clinical obstetrics and gynecology Volume: 53 ISSN: 1532-5520 ISO Abbreviation: Clin Obstet Gynecol Publication Date: 2010 Dec
Date Detail:	Created Date: 2010-11-04 Completed Date: - Revised Date: -
Medline Journal Info:	Nlm Unique ID: 0070014 Medline TA: Clin Obstet Gynecol Country: United States
Other Details:	Languages: eng Pagination: 842-50 Citation Subset: IM
Affiliation:	Department of Obstetrics and Gynecology and Rush Fetal and Neonatal Medicine Center, Rush University, Chicago, Illinois, USA. Jacques_abramowicz@rush.edu
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