During monopolar desiccation, what happens to impedance as tissue dries?

During monopolar desiccation, what happens to impedance as tissue dries?

• A. Impedance decreases, allowing continued energy flow.
• B. Impedance remains constant during desiccation.
• C. Impedance fluctuates randomly during desiccation.
• D. Impedance increases as tissue dries, causing current to stop flowing.

Answer: (D)

During monopolar desiccation, tissue moisture is driven out, which increases electrical resistance. As water content and ionic conduction decrease, impedance rises, reducing current flow and eventually stopping energy transmission through the tissue. So impedance increases as tissue dries, causing the current to stop flowing. The other patterns don’t match what happens with drying tissue: conductivity doesn’t improve with drying, it doesn’t stay constant, and it doesn’t fluctuate randomly in this context.

During monopolar desiccation, tissue moisture is driven out, which increases electrical resistance. As water content and ionic conduction decrease, impedance rises, reducing current flow and eventually stopping energy transmission through the tissue. So impedance increases as tissue dries, causing the current to stop flowing. The other patterns don’t match what happens with drying tissue: conductivity doesn’t improve with drying, it doesn’t stay constant, and it doesn’t fluctuate randomly in this context.