Chapter 3

Question 1

Insufflation

Answer 1

denotes the blowing of anesthetic gases across a patient’s face; considered a technique that avoids direct connection between a breathing circuit and a patient’s airway; no rebreathing if the flow is high enough, but ventilation cannot be controlled

Question 2

Open-drop anesthesia

Answer 2

highly volatile anesthetic (ether or halothane) dripped into gauze-covered mask and applied to patient’s face

Question 3

Draw-over anesthesia

Answer 3

air is drawn through a low-resistance vaporizer as the patient inspires; disadvantages: no reservoir bag (no depth of tidal volume), nonrebreathing valve, PEEP, and circuit filter close to patients head= difficult for head/neck surgery

Question 4

Which Mapleson design is most efficient for spontaneous ventilation?

Answer 4

A; APL valve open to allow for venting of exhaled air

Question 5

Which Mapleson design is most efficient for mechanical ventilation?

Answer 5

D; switches APL and fresh gas inlet– FGF forces alveolar air away from patient and toward APL valve

Question 6

Bain circuit

Answer 6

modification of Mapleson D that incorporates the fresh gas inlet tubing inside the breathing tube (decrease circuit bulk and retains heat and humidity)