Breathing Systems — Flashcards

Flashcard 1: The most effective circuit for anesthesia under controlled breathing is Mapleson _____

Answer: D (Bain circuit)

Extra: Efficiency of Mapleson circuits: - **Controlled ventilation**: D > E > F > B > C > A - **Spontaneous ventilation**: A > D > E > C > B

Flashcard 2: Which anesthetic equipment malfunction is characterized by a capnography waveform showing an **elevated baseline** and a **prolonged Phase III** (alveolar plateau)?

Answer: Expiratory valve malfunction

Extra: Incompetence of either the inspiratory or expiratory valve results in rebreathing of CO2, manifested as an **elevated baseline** (the CO2 level does not return to zero during inspiration). An **expiratory valve malfunction** specifically results in a prolonged Phase III (alveolar plateau) and an elevated baseline because exhaled gas is drawn back from the expiratory limb during inspiration.

Flashcard 3: Mapleson _____ circuit is also referred to as Bain circuit

Answer: D

Flashcard 4: Check valve/internal vapourizers is a part of the _____ pressure system of the anesthesia machine

Answer: low

Flashcard 5: The following capnography waveform represents: _____

Answer: expiratory valve malfunction

Flashcard 6: Mapleson _____ circuit is also referred to as Waters' circuit

Answer: C

Flashcard 7: The following capnography waveform represents: _____

Answer: hypoventilation

Flashcard 8: Mapleson _____ circuit is also referred to as Magills

Answer: A

Flashcard 9: Mapleson _____ circuit is also referred to as Bain circuit

Answer: D

Flashcard 10: The following capnography waveform represents: _____

Answer: curare clefts