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Equipment, Instrumentation, and Technology

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What is the maximum allowable current leakage in the operating room?

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(A) 10 uA

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(B) 20 mA

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(C) <1 mA

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(D) 100 mA

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A. Rationale: The maximum allowable current leak in the operating room is 10 uA.

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Butterworth  J.F., Mackey  D.C., Wasnick  J.D.(2013). Ch 2 Morgan & Mikhail's Clinical Anesthesiology (5th ed.). New York, NY: McGraw-Hill.

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What monitor alarms when a high current flow to the ground exists?

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(A) Isolation transformer

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(B) Line isolation monitor

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(C) Leak current

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(D) High-efficiency particulate filter

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B. Rationale: The line isolation monitor affords protection from electrical shocks in the operating room. The isolation transformer affords isolation between the power supply in the operating room and the ground. High efficiency particulate (HEPA) filters are used to maintain air quality in the operating room.

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Butterworth  J.F., Mackey  D.C., Wasnick  J.D.(2013). Ch 3 Morgan & Mikhail's Clinical Anesthesiology (5th ed.). New York, NY: McGraw-Hill.

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What humidity levels are appropriate for the operating room?

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(A) 20-25%

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(B) 30-35%

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(C) 40-45%

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(D) 50-55%

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D. Rationale: Humidity levels between 50-55% foster infection control in the operating room. Sterile drapes may be affected by high humidity causing dampness, whereas low humidity may accelerate movement of particulate matter.

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Butterworth  J.F., Mackey  D.C., Wasnick  J.D.(2013). Ch 3 Morgan & Mikhail's Clinical Anesthesiology (5th ed.). New York, NY: McGraw-Hill.

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Which of the following is true about heat and moisture exchangers?

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(A) Dead space increases.

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(B) Heat and moisture exchangers increase heat loss.

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(C) Dead space decreases.

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(D) Heat and moisture exchangers increase water loss.

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A. Rationale: When using a heat and moisture exchanger, dead space increases.

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Butterworth  J.F., Mackey  D.C., Wasnick  J.D.(2013). Ch 42 Morgan & Mikhail's Clinical Anesthesiology (5th ed.). New York, NY: McGraw-Hill.
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Miller  R.D., Pardo  M.C.(2011). Ch 15 Basics of Anesthesia (6thed.). Philadelphia, PA: Elsevier.

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