Which of the following statements related to the safety of biomedical instruments are TRUE?
Show Hint
- When a person is exposed to an electrical hazard, let-go current is defined as the maximum current at which the subject can withdraw voluntarily
- Microshock is a physiological response resulting from an electrical current passing through heart
- The patient in an intensive care unit is being exposed to the danger of microshock because of using internal conductive electrodes in the vicinity of the heart
- The 50 Hz safe current limit for a microshock is greater than 50 mA
The Correct Option is A, B, C
Solution and Explanation
(B) Microshock occurs when extremely small currents (µA range) pass directly through the heart, making this statement true.
(C) ICU patients with invasive conductive leads (pacemaker wires, catheters, saline lines) are at high risk of microshock; hence true.
(D) Microshock safe current limits are in microamperes, not above 50 mA — so this statement is false.
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