PREVENTIVE MAINTENANCE CHECKS AND SERVICES
Section I. PREVENTIVE MAINTENANCE CHECKS AND SERVICES
You must ensure the Birtcher Hyfrecator continues to function efficiently. This
lesson introduces the general operation of the hyfrecator, its controls and configurations,
the safety precautions you need to follow, and the procedures you use for quarterly PMCS
confusion. The following definitions will help you understand the terms.
a. Monoterminal, Monopolar, or Oudin Current. A high-frequency, high-voltage
current discharging from one outlet or terminal to the patient is variously described as
monoterminal, monopolar, or as an Oudin current.
b. Bipolar, Bi-terminal, or Bi-active. Current traveling from a high-frequency
oscillator through an active cable, an electrode, a small area of tissue, and through
another electrode and cable.
(1) Monoterminal application of the high frequency current may have an effect
upon tissue varying from very light and superficial dehydration to relatively deep
penetration and destruction.
(2) Bipolar application may create an effect in tissue varying from insufficient
to very heavy coagulation.
(3) Either application carried to extreme intensity or long duration will cause
carbonization or charring.
CONTROLS AND STATUS INDICATORS
Review the functions of the following controls and status indicators to ensure that
you understand their purpose and how they function. The number at the end of each
control or indicator refers to the item in figure 1-1.