Chison ECO 6, Руководство по эксплуатации

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ECO 6 Digital Color Doppler Ultrasound System
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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: Soft Tissue Thermal Index (TIS), Bone Thermal Index (TIB) and Cranial
Bone Thermal Index (TIC).
Soft Tissue Thermal Index (TIS). Used when imaging soft tissue only, it provides an estimate of potential
temperature increase in soft tissue.
Bone Thermal Index (TIB). Used when bone is near the focus of the image as in the third trimester OB
examination, it provides an estimate of potential temperature increase in the bone or adjacent soft tissue.
Cranial Bone Thermal Index (TIC). Used when bone is near the skin surface as in transcranial examination, it
provides an estimate of potential temperature increase in the bone or adjacent soft tissue.
Cavitations: Cavitations 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 cavitations, 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
cavitations and the related adverse effects.
MI recognizes the importance of non-thermal processes, cavitations in particular, and the Index is an attempt to
indicate the probability that they might occur within the tissue.
2.6 Scanning Patients and Education
The Track-3 or IEC60601-2-37 output display standard allows users to share the responsibility for the safe use
of this ultrasound system. Follow these usage guidelines for safe operation:

In order to maintain proper cleanliness of the probes, always clean them between patients.
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Always use a disinfected sheath on all EV/ER probes during every exam.

Continuously move the probe, rather than staying in a single spot, to avoid elevated temperatures in one
part of the patient’s body.

Move probe away from the patient when not actively scanning.

Understand the meaning of the TI, TIS, TIB, TIC and MI output display, as well as the relationship between
these parameters and the thermal/cavitation bioeffect to the tissue.

Expose the patient to only the very lowest practical transmit power levels for the shortest possible time to
achieve a satisfactory diagnosis (ALARA - As Low As Reasonably Achievable).
2.6.1 Safe Scanning Guidelines

Ultrasound should only be used for medical diagnosis and only by trained medical personnel.

Diagnostic ultrasound procedures should be done only by personnel fully trained in the use of the
equipment, in the interpretation of the results and images, and in the safe use of ultrasound (including
education as to potential hazards).

Operators should understand the likely influence of the machine controls, the operating mode (e.g. B mode)
and probe frequency on thermal and cavitation hazards.
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