Safety
2-20 Vscan Air – User Manual
Direction GP092020-1EN
Rev 18
Sensitive tissues
Particular care should be taken to reduce the risk of thermal
hazard when exposing the following to diagnostic ultrasound:
- an embryo less than eight weeks after conception;
-
the
head, brain or spine of any fetus or neonate;
- an eye (in a subject of any age).
The British Medical Ultrasound Society has suggested some
maximum scanning times relative to displayed TI as follows:
Further guidance on the safe use of obstetric ultrasound can be
found in the Official statements of the American Institute of
Table 2-5: Recommended maximum scanning times
Obstetric scanning
General Abdominal, Peripheral
Vascular, Musculoskeletal, Cardiac
and other not listed applications
TI time TI time Note
0.0–0.7 Unlimited 0.0–1.0 Unlimited Monitor TI
0.7–1.0 < 60 min 1.0–1.5 < 120 min
1.0–1.5 < 30 min 1.5–2.0 < 60 min
1.5–2.0 < 15 min 2.0–2.5 < 15 min
2.0–2.5 < 4 min 2.5–3.0 < 4 min
2.5–3.0 < 1 min 3.0–4.0 < 1 min
References
• T
he British Medical Ultrasound Society. Guidelines for the safe use of diagnostic ultrasound equipment.
• Amer
ican Institute of Ultrasound in Medicine Consensus Report on Potential Bioeffect
s of Diagnostic
Ultrasound.
Ultrasound in Medicine (AIUM) – “Prudent Use and Safety of
Diagnostic Ultrasound in Pregnancy.”
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