To maximize effectiveness, what condition occurs between or on the probes?

• A. The device being submerged
• B. Direct contact between or on the probes
• C. The subject avoiding contact
• D. The device being turned off

Answer: (B)

Direct contact between or on the probes provides the conductive path for the energy to flow through the target. The two probes must be in contact with the body (or bridged across it) so the high-voltage, short-duration pulses can travel through tissues, producing the intended neuromuscular effect. If the device is submerged, the current can spread into the water and lose focus through the target; if there’s no contact or the device is off, no energy enters the body. In short, a direct, closed path through the subject is what makes the device most effective.