bk ultrasound Flex Focus 1202, Руководство пользователя

Страница: 17 / 66

Flex Focus 1202 User Guide (BB1756-Q) Safety Information 17
Electrical Noise
Electromagnetic Interference
Medical electrical equipment requires special precautions regarding EMC
(electromagnetic compatibility) [6]. You must follow the instructions in this chapter
when you install the system and put it into service.
If the image is distorted, it may be necessary to position the system further from
sources of electromagnetic interference or to install magnetic shielding.
EMC noise can reduce the usable image depth. Therefore, to avoid having to repeat
an ultrasound examination, you must make sure beforehand that the ultrasound
system can be used for the examination. Repeating an examination can be regarded
as a potential risk that should be avoided, especially if the examination involves
transducers used intracorporeally or transducers used for puncture.
RF (Radio Frequency) Interference
Portable and mobile RF (radio frequency) communication equipment can affect the
system, but the system will remain safe and meet essential performance
requirements.
An ultrasound system intentionally receives RF electromagnetic energy for the
purpose of its operation. The transducers are very sensitive to frequencies within
their signal frequency range (0.3MHz to 80MHz). Therefore RF equipment
operating in this frequency range can affect the ultrasound image. However, if
disturbances occur, they will appear as white lines in the ultrasound picture and
cannot be confused with physiological signals.
Electrical
noise
WARNING EN-w1
Electrical noise from nearby devices such as electrosurgical devices – or from devices that
can transmit electrical noise to the AC line – may cause disturbances in ultrasound images.
This could increase the risk during diagnostic or interventional procedures.
Other
equipment
nearby
WARNING EMC-w1
Do not use this equipment adjacent to other equipment. If you must place it next to or
stacked with other equipment, verify that it operates normally there and neither causes
nor is affected by electromagnetic interference.
Possible
interference
sources
Caution Inter-c1
Other equipment may interfere with the system, even if that other equipment
complies with CISPR (International Special Committee on Radio Interference)
emission requirements.
Use specified
equipment
only
Caution Inter-c2
If you use accessories, transducers or cables with the system, other than those specified,
increased emission or decreased immunity of the system may result.