TEE Leakage Current Test
The electrical safety check described here should be performed regularly to
determine if there is a hole in a transducer’s outer insulating layer. This procedure
detects liquid pathways to the interior parts of the transducer shaft and tip by
measuring third-wire leakage current. This procedure can be performed with
any commercially available safety analyzer that is designed for hospital use.
WARNING
Only a technically qualified person should perform the leakage-test procedure.
TEE Test Background
The test procedure (see figure) involves making an AC measurement of the
ultrasound system current without a transducer. The results are then compared
with the current measured when it is forced to flow through the insulating layer
of the TEE transducer. If the two currents are nearly the same, it means there
is a hole in the transducer’s outer insulating layer that must be fixed before using
the transducer.
iE33 User Manual
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Transesophageal Transducers
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