RT203 final
Which of the following shifts the oxyhemoglobin dissociation curve to the left?
fetal hemoglobin
Carboxyehmoglbin shifts the oxyhemoglbin dissociation curve to the left which means
inhibits the unloading of oxygen at the tissues
Hypercapnia occurs when the level of alveolar ventilation
is not sufficient to remove CO2
A 50 year old patient has a Pa02 value of 72 torr when breathing room air. How should this be interpreted?
normal for a person of that age
Which of the following is a true statement regarding the term hypoxemia?
occurs when patient's PaO2 is lower than predicted
Which of the following is the most common site for arterial puncture?
radial artery
Which of the following is true regarding respiratory alkalosis?
the PaCO2 is <35 mm HG
Moderate hypoxemia is labeled as having a Pa02 of
40-59 mm Hg
C0Hb levels for smokers are commonly
5-10%
What is the normal value for arterial pH?
7.35-7.45
For a healthy young person, what is the normal value for PaO2 in the adult patient?
80-100 mm HG
Severe hypoxemia is classified as a Pa02 of
<40 mm Hg
Acidemia reveals a higher then normal number of ________in the CNS
H+
To evaluate a patient's ventilatory status, you would recommend which of the following?
arterial blood gas
What is the primary method of transporting oxygen in the blood?
bound to hemoglobin
For the test of collateral circulation in Question 3, "pinking up" of the hand is normal if it occurs within ____ seconds.
10-15
An arterial puncture site normally should be compressed for a minimum of ___ minutes after the puncture
3
A patient is brought in from the ambulance, having been in a house fire. She is unconscious. Her cannula has melted to her face and she shows signs of smoking with brown colored nails. The physician believes that she is suffering from smoke inhalation. What device would you recommend as the best way to evaluate her?
ABG's analyzed through a C0 oximeter
Which of the following parameters is the respiratory component of acid-base status?
PaCO2
Which of the following would be best used to assess arterial oxygenation?
PaO2
Which of the following is not associated with a right shift on the oxygen dissociation curve
alkalosis
what would cause a left shift on dissociation curve and increase in Hemoglobin oxygen affinity?
alkalosis hypocapnia hypothermia
Which of the following tests is performed to check the collateral circulation of the radial artery before puncture?
allen's test
Which of the following is the best indicator of metabolic acid-base status?
base excess BE
Before an ABG is obtained, the patient's clotting parameters should be evaluated because:
bleeding time may be prolonged if the platelet levels are low
Which assessment tool would not be something to use to measure oxygenation status?
capnography
What is the direct effect of an increased PaCO2 on HCO3?
causes it to increase
Given the following ABG results, interpret the acid-base status:pH 7.44, PaCO2 25 mm Hg, HCO3 17 mEq/L, base excess -6 mEq/L
compensated respiratory alkalosis
A shift to the right in the oxyhemoglobin dissociation curve has what affect on the affinity of hemoglobin for oxygen?
decreased
Which of the following could cause metabolic acidosis?
diabetic ketoacidosis
A patient has Guillain Barre syndrome and pneumonia. The patient has just been placed on 35% )2 mask. The physician asks for yor suggestion on the best way to evaluate the patient's overall ability to breathe, you would recommend?
draw an ABG to evaluate PaCO2
What defines acidosis in a human?
pH <7.35
A 17-year-old man is brought into the emergency department. Vitals are as follows: pulse, 100 beats/min; respiratory rate, 4 breaths/min; and blood pressure, 100/65 mm Hg. The patient was at a party, where he was discovered by his friends to be slumped in a chair and unresponsive. ABG results are as follows:pH 7.29, PaCO2 68 mm Hg, HCO3 29 mEq/L, BE + 1 mEq/LThe patient's acid-base status is classified as which of the following?
partial compensated respiratory acidosis
A patient has the following ABG results:pH 7.25, PaCO2 32 mm Hg, HCO3 16 mEq/L, base excess -10 mEq/LBased on these findings, the patient has which of the following?
partially compensated metabolic acidosis
A 35-year-old, 54-kg woman with congestive heart failure enters the emergency department short of breath. An ABG shows the following results:pH 7.50, PaCO2 30 mm Hg, HCO3 23 mEq/L, base excess +2 mEq/LThe patient's ABG results indicate which of the following?
uncompensated respiratory alkalosis