RPT 223 ABG Wilkins Chapter 8 End of Chapter questions
An acute increase in Paco2 of 10 to 15 mm Hg causes a corresponding increase in plasma HCO3- of how much
1 mmol/L
What represents a normal P(A-a)02 for a 50 year old woman breathing room air
15 mm Hg
What is the normal range for Ca02
16-20 mL/dL
Which of the following ratios of HCO3-/Pa02 would result in a pH of 7.40
25:40
A patient has a measured Sa02 of 82%. What is his approx. Pa02
50 mm Hg
What is the common normal range for arterial pH
7.35-7.45
What is the common range for Pa02 breathing air at sea level
80-100 mm Hg
A 5 year old patient is admitted to the emergency department with suspected smoke inhalation. To assess the oxygenation status, you would recommend..
ABG and CO-oximetry
A patient receiving mechanical ventilation requires frequent assessment of oxygenation, ventilation, and acid-base balance. What would be recommended
ABG sampling through an A-line
To evaluate a patient's acid-base status, you would recommend which of the following
Arterial blood gas
True statement regarding standard pulse oximeters
In patients with good perfusion, their accuracy is in the 2% to 4% range
An 80-year old patient has a Pa02 of 71 mm Hg. How would you describe this finding
Mild hypoxemia
In performing an Allen test on a patient's left wrist before drawing an arterial sample, you note that her hand remains blanched for more than 25 seconds after releasing pressure on the ulnar artery. What actions would you take at this time
Repeat the test on the opposite wrist
Which infection control precautions would you apply when obtaining an arterial blood gas sample
Standard precautions plus face shield
Continuous noninvasive assessment of patient oxygenation can be provided by
Transcutaneous P02, Pulse oximetry
What can cause metabolic acidosis
renal disease
What would present as respiratory alkalosis
the Paco2 is less than 35 mmHg
What could you use to assess the adequacy of ventilation in an intubated child receiving mechanical ventilation
transcutaneous Pc02, Capnography, ABG
Which of the following is the preferred site for arterial puncture
Radial artery
Which of the following is the best indicator of metabolic acid-base status
Base excess
Before an ABG sample is obtained, the patient's clotting parameters should be evaluated because
Bleeding time may be prolonged if they are abnormal
To measure actual blood 02 sat, you would recommend
CO-oximetry
Which parameters represents the respiratory component of acid-base status
Paco2
A patient breathing 40% 02 has a markedly higher than normal P(A-a)o2 which does not improve when the 02 concentration is increased to 50%. What is the most likely cause of her hypoxemia
Pulmonary shunting
Which of the arterial blood gas acid-base reports represents an error
pH=7.50, Paco2= 50 mm Hg, HCO3-=20 mmol/L
