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Medical Gas Therapy

Medical Gas Therapy Chapter 38, pgs. 867-901.

QuestionAnswer
Which of the following is false about absorption atelectasis? A) It can occur only when breathing supplemental O2.
To ensure the prescribed FIO2 for a patient receiving 65% O2, you apply a closed reservoir delivery system with a one-way expiratory valve. What other component must be included in this system to ensure a fail-safe operation? C) Emergency inlet valve
At an FIO2 of 1, what is the approximate half-life of blood carboxyhemoglobin? B) 80 minutes
Which of the following would indicate adequate oxygenation for adult patients with chronic lung disease and an accompanying acute-on-chronic hypoxemia? I. SaO2 of 90% or higher II. PaO2 of 50 mm Hg to 60 mm Hg III. SaO2 of 85% to 90% B) II and III II. PaO2 of 50 mm Hg to 60 mm Hg III. SaO2 of 85% to 90%
Which of the following is false about multiplace hyperbaric oxygenation chambars? Feedback: Refer to page 893 A) The chamber normally is filled with 100% O2.
To prevent an adverse rebound effect when withdrawing NO therapy, what should you do? I. Reduce the NO to the lowest effective dose (ideally, less than 5 ppm). II. Hyperoxygenate the patient just before discontinuing NO. III. Ensure that the patient is hemodynamically stable. D) I, II, and III
An O2 delivery device takes separate pressurized air and O2 sources as input, then mixes these gases through a precision valve. What does this describe? A) O2 blending system
A patient receiving 35% O2 through an air-entrainment mask set at 6 L/min input flow becomes tachypneic. Simultaneously, you notice that the SpO2 has fallen from 91% to 87%. Which of the following actions would be most appropriate in this situation? B) Increase the device’s input flow to 10 L/min.
Which of the following would indicate a need for O2 therapy for a newborn infant? I. SaO2 less than 88% II. Capillary PO2 less than 40 mm Hg III. PaO2 less than 60 mm Hg B) I and II I. SaO2 less than 88% II. Capillary PO2 less than 40 mm Hg
Features of an ideal delivery system for NO for use with mechanical ventilation include all of the following except B) premixes NO and O2 in a holding reservoir.
You must deliver the highest possible FIO2 to a 67-year-old man with pulmonary edema breathing at a rate of 35/min. Which of the following O2 delivery systems would be most appropriate? A) Nonrebreathing mask at 12 to 15 L/min
What is the maximum FIO2 expected to be delivered by most air-entrainment masks? C) 50%
You start a chronic obstructive pulmonary disease (COPD) patient on a nasal O2 cannula at 2 L/min. What is the maximum time that should pass before assessing this patient’s PaO2 or SaO2? A) 2 hours
Which of the following signs and symptoms are associated with the presence of hypoxemia? C) I, II, and III I. Tachypnea II. Tachycardia III. Cyanosis
Retinopathy of prematurity may result in which of the following? D) Blindness
All of the following conditions can be treated with hyperbaric oxygen (HBO) therapy except: B) septic shock.
Which of the following factors determine the actual O2 provided by an air-entrainment system? C) I, II, and III I. O2 input flow to the jet II. air-to-O2 ratio of the device III. resistance downstream from the jet
An infant requires both a precise high FIO2 and maintenance of a neutral thermal environment. Which of the following systems can best achieve these goals? A) I and II I. Oxy-Hood or warmed O2 blending system without incubator. II. Heated incubator with automatic O2 controlling system.
A physician orders a 70% He:30% O2 mixture to reduce the work of breathing in a patient having an acute asthmatic attack. Which of the following delivery systems would be appropriate in this case? D) Nonrebreathing mask at 10 L/min
You set up an Oxy-Hood with an FIO2 of 0.5 for a newborn infant. What is the maximum time that should pass before assessing this patient’s PaO2 or SaO2? A) 1 hour
At what level of carboxyhemoglobin saturation is hyperbaric oxygen (HBO) therapy indicated for an adult patient? D) Greater than 25%
Which of the following is FALSE about air-entrainment systems? A) Their FIO2 values are directly proportional to their total flow.
23. Physiologic effects of inhaled nitric oxide (NO) include all of the following except: A) recruitment of collapsed alveoli.
Physiologic effects of hyperbaric oxygen (HBO) therapy include all of the following except: D) systemic vasodilation.
A physician orders 40% O2 through an air-entrainment nebulizer for a patient with a minute volume of 12 L/min. What is the minimum nebulizer input flow required to ensure the prescribed FIO2? B) 10 L/min
What are some key patient considerations in selecting O2 therapy equipment? D) I, II, III, and IV I. Type of airway (natural or artificial) II. Severity and cause of the hypoxemia III. Age group (infant, child, adult) IV. Stability of the minute ventilation
Compared to air, the density of an 80% He and 20% O2 mixture is about which of the following? C) One-third as much
Benefits of properly applied O2 therapy in patients with chronic hypoxemia include all of the following except: D) improved pulmonary diffusing capacity.
Clogging of an isolette incubator air inlet filter will result in which of the following? C) Increased O2 concentrations
To confirm proper operation of an O2 blending system, what should you do? I. Test low-pressure alarms and bypass systems. II. Analyze FIO2 at 0.21, 1.00, and prescribed level. III. Confirm air and O2 inlet pressures. D) I, II, and III I. Test low-pressure alarms and bypass systems. II. Analyze FIO2 at 0.21, 1.00, and prescribed level. III. Confirm air and O2 inlet pressures
Created by: Andre McNair Andre McNair on 2010-12-07



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