1. To illustrate why higher frequencies are used for electrosurgical units consi
ID: 2991255 • Letter: 1
Question
1. To illustrate why higher frequencies are used for electrosurgical units consider the following. The typical impedance of tissue is 1000 j2T 10H where f is the frequency of the applied voltage. Compute the magnitude of the current if a voltage of 50V cos (21 ft) where f 60 Hz. Repeat the calculation for f 600 Hz and 6000 Hz. Does this explain why an electrosurgical unit uses higher frequencies? 2. A person has a skin resistance of 100 kn on the hand holding a 2 cm2 electrode. The same electrode on the forearm creates a resistance of 50 k2. When electrode gel is added to the electrode, the resistance goes down to 5 kn and when the skin is penetrated by the electrode, the resistance falls to 502. If a stimulus current of 7.5 mA is considered dangerous, what voltage level is considered dangerous in each case? 3. the worst case micro-shock situation resulting from stray capacitance leakage from 120 V, 60 2 power line voltage is assumed to be a direct contact of the equipment chassis to a pacemaker lead wire embedded in a cardiac muscle. If the heart resistance and skin resistance may be considered negligible, compute the maximum allowed stray capacitance, C, which keeps the leakage current through the heart below 10 uA. 120 V III 10 A. 60 HExplanation / Answer
This is not compter Science Problem dear.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.