Chapter 12 - System Safety and Maintenance Processing Terason Transducers Between Uses
Terason t3000 / Echo Ultrasound System User Guide 282
Formula:
Range: 0-60 cm
Accuracy: Determined by two independent distance measurements
RMS errors: For C=6.3 cm, accuracy=6%
Volume
Volume accuracy measures are as follows:
Assumptions: Cylinder, length of axes: 2a, 2b, 2c (height)
Formula: V = 4/3(
abc)
Range: 0-3000 ml
Accuracy: Determined by three independent distance measurements. The deviation of a
particular shape from the ellipsoid cannot be quantified.
RMS errors: For V=16 ml, accuracy=8%
Reference information for the above accuracy measures was obtained from the following
source:
Standard Mathematical Tables, 24th Edition, (Cleveland: CRC Press, 1976), 12, 17.
Processing Terason Transducers Between Uses
Each transducer must be processed between uses according to the type of tissue it will
contact during use:
• Non-critical applications in which the device contacts only intact skin –clean and low-
level disinfect the transducer.
• Semi-critical use, such as endocavity applications (where the device may contact
mucous membranes) – clean and high-level disinfect the transducer. Use of a sheath is
recommended. The sheath can be surgically clean for transvaginal or transrectal uses,
but must be sterile for endoscopic use.
• Critical use, in which the device contacts blood, compromised tissue, or is used in a
sterile field – clean and at least high-level disinfect the transducer. Use of a sheath is
required.
Warning: In addition to the instructions in this guide, follow the
instructions provided by the manufacturer of cleaners and
disinfectants.
C2
a
2
b
2
+
2
--------------------
=
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