1. ELECTRICAL SAFETY FOR MEDICAL EQUIPMENT By m.naga sundhari

2. INTRODUCTION TO VARIOUS TEST EQUIPMENT USED IN BIOMEDICAL ENGINEERING

3. Electrical Safety Analyser
Test Instrument
Electrical Safety Analyser

4. Defibrillator analyzer
It measures delivered energy on its internal load
The defibrillator pulse is stored and it can be viewed
via ECG output leads, paddles or scope output.

5. Blood Pressure Blood pressure simulator that provides simulation
to test blood pressure monitors

6. The pulse oximeter testing method to simulate
the light absorption and arterial blood flow of a human finger

7. External pacemaker tester designed for accurately testing all types of

8. SAFETY TESTERS
purpose of safety testing- in medical electrical equipment user safety
Ground resistance of medical equip-not exceed 0.5ohm

9. Electrical Shock
unwanted or unnecessary physiological response to current.
Three phenomena :
electrical stimulation of excitable tissue (nerve & muscle)
resistive heating of tissue, and
(3) electrochemical burns and tissue damage

10. Electricity -Physiological Effects
The amount of heat depends on the power- dissipated (I2R or VI). Whether or not the heat produces a burn depends on the current density.

11. Respiratory Arrest
The muscles between the ribs (intercostal muscles) need to repeatedly contract and relax in order in order to facilitate breathing

12. Cardiac Arrest
The heart is a muscular organ perform its function as a pump for the blood
Tetanus(heart musculature ) prevent pumping process

13. Ventricular Fibrillation
the electrical signals that trigger the heartbeat become very fast

16. GENRAL ELECTRICAL SAFETY

17. For dog: 20uA, human : 80~600uA Safety limit : 10uA
MICRO AND MICRO SHOCK
For dog: 20uA, human : 80~600uA
Safety limit : 10uA

18. General Electrical Safety

19. Electricity – Patient Leakage Current

20. Avoid:
•Using cheaters (three-prong adapters)
•Using extension cords
•Placing liquids on electrical equipment
•Pulling plugs out of receptacles by the cord
•Rolling equipment over power cords
•Using defective equipment or receptacles
•Using equipment that sparks, smokes, or shocks

21. Thank you