S2/S2BW
Digital Color Doppler Ultrasound System
•
Do not use the switch at the back of the unit for normal shut down. Always use the power-on button in
the keyboard area
•
Do not unplug probe when the system is in active operation. Doing so may damage the probe. Always
go to EXAM screen when need to remove the probe.
•
To prevent from arm or neck injury, the operator should not stay at the same position for too long during
patient scanning without taking break.
• Do not put liquid on top of the main unit.
• For proper disposal of this product, please contact our service department.
2.2 Symbol Used
Refer to Appendix A.
2.3 Biological Safety
This product, as with all diagnostic ultrasound equipment, should be used only for valid reasons and should
be used both for the shortest period of time and at the lowest power settings necessary (
ALARA
- As Low
As Reasonably Achievable) to produce diagnostically acceptable images.
The AIUM offers the following guidelines:
Clinical Safety Quoted from AIUM
Approved March 26, 1997
Diagnostic ultrasound has been in use since the late 1950s. Given its known benefits and
recognized efficacy for medical diagnosis, including use during human pregnancy, the American
Institute of Ultrasound in Medicine herein addresses the clinical safety of such use:
There are no confirmed biological effects on patients or instrument operators caused by
exposures from present diagnostic ultrasound instruments. Although the possibility exists that
such biological effects may be identified in the future, current data indicate that the benefits
to patients of the prudent use of diagnostic ultrasound outweigh the risks, if any that may be
present.
Heating:
Elevating tissue temperature during obstetrical examinations creates medical concerns. At the embryo
development stage, the rise in temperature and the length of time exposed to heat combine to determine
potential detrimental effects. Exercise CAUTION particularly during Doppler/Color exams.
The Thermal Index (TI) provides a statistical estimate of the potential temperature elevation (in centigrade) of
tissue temperature. Three forms of TI are available: TIS, for soft tissue exposures; TIB, for instances when
bone lies near the beam focus; and TIC, for the heating of bone situated close to the transducer.
Cavitation:
Cavitation may occur when sound passes through an area that contains a cavity, such as a gas bubble or air
pocket (in the lung or intestine, for example). During the process of cavitation, the sound wave may cause the
bubble to contract or resonate. This oscillation may cause the bubbles to explode and damage the tissue. The
Mechanical Index (MI) has been created to help users accurately evaluate the likelihood of cavitation and the
related adverse effects.
P/N: 4710.00149A01
2-2
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