Anesthesia Equipment and Delivery Flashcards

Which component of an anesthesia machine reduces high-pressure oxygen from the cylinder to a safe working pressure?

Answer: Pressure regulator (yoke block)

The pressure regulator reduces cylinder pressure to approximately 50 psi before gas enters the flowmeters.

A demand-valve oxygen delivery system provides oxygen only when the patient:

Answer: Initiates an inspiratory effort

A demand valve senses the patient inspiratory effort and opens to deliver oxygen on demand.

The function of a reservoir bag in an anesthesia breathing circuit is to:

Answer: Serve as a visual indicator of breathing and allow manual ventilation

The reservoir bag allows the assistant to visually monitor respiratory rate and tidal volume and can be squeezed to assist or control ventilation manually.

Which mask size is generally appropriate for a preschool-aged child ages 3 to 5 during nitrous oxide sedation?

Answer: Size 2 (pediatric small)

Size 2 pediatric masks fit most children aged 3 to 5, minimizing gas leakage and ensuring accurate delivery of the N2O/O2 mixture.

After each patient use, nitrous oxide nasal masks should be:

Answer: Sterilized in an autoclave or disinfected per manufacturer guidelines

Nitrous oxide nasal masks must be disinfected or sterilized according to manufacturer instructions between patients to prevent cross-contamination.

When using a nonrebreather mask for supplemental oxygen, flow rates are typically set at:

Answer: 10 to 15 L/min

Nonrebreather masks require 10 to 15 L/min to keep the reservoir bag inflated and deliver approximately 60 to 90 percent oxygen.