Which of the following are O2-conserving devices? 1. ...

[jenna1]

Which of the following are O2-conserving devices? 1. Transtracheal oxygen catheters 2. Reservoir cannulas 3. Pulse-demand oxygen-delivery systems 4. E size cylinder O2 tanks
 
  a. 1, 2, and 4 c. 1, 3, and 4
  b. 1, 2, and 3 d. 1, 2, 3, and 4

Question 2

In a pulse-demand oxygen-delivery system, the _____ replaces the flowmeter.
 
  a. Pendant c. Pressure-relief valve
  b. Demand valve d. Flow valve

[brittiany.barnes]

Answer to Question 1

ANS: B
Transtracheal oxygen catheters, reservoir cannulas, and pulse-demand oxygen-delivery systems are recent developments that have significantly improved the delivery of oxygen therapy, espe-cially with regard to conserving oxygen supplies during long-term oxygen therapy.

Answer to Question 2

ANS: B
The demand valve connects directly to the oxygen source (50 psig), therefore replacing the flowmeter that is used with continuous-flow cannulas. Note that demand systems can function as pulsed or continuous-flow sources of oxygen. Settings allow the operator to select the equivalent of 1 to 5 L/min of oxygen flow from a conventional flowmeter.