For safety information on electrosurgical units, pacemakers, defibrillators, and related topics,
see
“Electrical Safety” on page 29
.
Leakage Current and TEE Transducers
For the TEE transducers discussed in this document, the insertion tube and tip are Type BF
,
as described in IEC 60601-1. There are no exposed conductive surfaces distal to the transducer
handle. Within the flexible shaft, all active circuits and conductors are surrounded by a chassis-
grounded shield that runs the length of the transducer.
If the outer layer of the shaft is punctured or cracked, a patient’s esophagus could be exposed
to chassis leakage current. This leakage current is not hazardous provided that the ground
connector (third wire) in the ultrasound system power cable is intact and connected to a
properly grounded wall outlet. Even if the ground connector breaks, leakage current is in
compliance with the limits noted in IEC 60601-1.
Leakage hazards are further reduced when the ultrasound system is plugged into an isolated
power outlet, which is standard in most operating rooms.
Reducing Risks of Using TEE Transducers
WARNING
Before defibrillation, if you cannot remove the transducer from the patient, always
disconnect invasive transducers that remain in contact with the patient from the system.
To reduce the possibility of electrical risks associated with use of TEE transducers, follow these
recommendations:
• Visually and tactually inspect a TEE transducer for bumps, cracks, and cuts before each TEE
exam. A small bump on the shaft surface could indicate that a strand from the ground
shield has broken and is beginning to puncture the outer layer. If you suspect a problem
with the flexible shaft, perform the electrical safety check procedure. See
• Use electrosurgical units (ESUs) that have isolated outputs. Return fault/ground fault
detection circuits provide additional protection. To determine if an ESU has an isolated
output, read the label on the ESU, see the ESU service guide, or ask a biomedical engineer.
Transesophageal Transducers
Electrical Safety and TEE Transducers
206
EPIQ 7 User Manual 4535 617 25341
Содержание epiq 7
Страница 4: ...4 EPIQ 7 User Manual 4535 617 25341 ...
Страница 26: ...Read This First Recycling Reuse and Disposal 26 EPIQ 7 User Manual 4535 617 25341 ...
Страница 94: ...DVD RW Drive System Overview System Components 94 EPIQ 7 User Manual 4535 617 25341 ...
Страница 100: ...Brake Steering Lock Pedal System Overview System Components 100 EPIQ 7 User Manual 4535 617 25341 ...
Страница 154: ...Customizing the System Custom Procedures 154 EPIQ 7 User Manual 4535 617 25341 ...
Страница 172: ...Performing an Exam Ending an Exam 172 EPIQ 7 User Manual 4535 617 25341 ...
Страница 198: ...Intraoperative Transducers Leakage Current Testing for Intraoperative Transducers 198 EPIQ 7 User Manual 4535 617 25341 ...
Страница 244: ...Endocavity Transducers Biopsy with Endocavity Transducers 244 EPIQ 7 User Manual 4535 617 25341 ...
Страница 298: ...System Maintenance For Assistance 298 EPIQ 7 User Manual 4535 617 25341 ...