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Module 2&3 ABG test Flashcards | StudBud
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Module 2&3 ABG test
Module 2&3 ABG test
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1
Hypoxemia is a __ condition.
Blood
Tissue
2
Most pulmonary perfusion occurs in zone ___.
Zone 2
Zone 3
Zone 1
3
Which is the greatest gauge of a capillary shunt?
Pulmonary edema
ALI
COPD
Asthma
4
Blood flow with no ventilation is which type of shunt ?
Anatomical shunt
Shunt like effect
Capillary shunt
Bypass shunt
5
The normal VD/VT in the spontaneously breathing individual is ___.
0.6 to 0.8
0.2 to 0.4
There is no normal
0.4 to 0.6
6
The progress of neuromuscular function can be monitored at the bedside through serial measurements
MRI
Blood gases
Vital capacity
Chest radiograph
7
what are the normal values of PvO2/PvCO2
PvCO2: 45
PvCO2: 35
PvO2: 35
PvO2: 40
8
Normal SaO2 is approximately ___ %.
99% to 100%
92% to 94%
95% to 97%
97%-98%
9
Combined oxygen is carried in combination with ___.
Hemoglobin
Granulocytes
Platelets
Lymphocytes
10
In COPD or obese patients, PaO2 is usually highest in the ___ position.
Sitting
Supine
11
The most common cause of metabolic alkalosis is ___.
Hyperkalemia
Fever
Gastric fluid loss
Aspirin overdose
12
The pretense of DPG ___ that affinity of hemoglobin oxygen.
Decreases
Increases
13
Which of the following is not an indication for long term O2 therapy use?
Presence of COPD
SaO2 less than or equal to 88
PaO2 of less than or equal to 60 mmHg
PaO2 of less than or equal to 55 mmHg
14
Physiological dead space is defined as ___.
Alveolar dead space
Relative dead space
Anatomic dead space
All the above
15
Acid base for blood gas
Respiratory Alkalosis
Respiratory acidosis
Metabolic acidosis
Metabolic Alkalosis
16
The most common cause of chronic respiratory acidosis is ___.
Hyperventilation
Asthma
COPD
Cystic fibrosis
17
Accumulated pulmonary secretions affect the distribution of ventilation primarily through their effects on pulmonary ___
Airway resistance
Compliance
18
A shunt defined as ___.
Deoxygenated blood getting to the left side of the heart
A blockage in the heart
Nope blood flow and no ventilation
A blockage in the lungs
19
The volume of fresh gas reach the alveoli each minute is called the ___.
Ventilation perfusion ratio
Cardiac minute output
Alveolar minute ventilation
shunt ventilation
20
Blood gas came back with PaO2 of 45 should O2 be ___
Given
Withheld
21
PEEP usually ___ V/Q mismatch
Improves
Worsens
22
The organs responsible for the regulation of blood bases is the __.
Lungs
Kidneys
23
HbCO can be accurately measured with a ___.
Pulse oximeter
CO-oximeter
24
The air in the conduction airways that does not participate in gas exchange is known as ___.
Physiologic dead space
True alveolar dead space
Relative alveolar deadspace
Anatomic dead space
25
Anion gap is used to determine if the __ is caused by either the accumulation of acids or excessive loss of HCO3
Respiratory acidosis
Metabolic alkalosis
Metabolic acidosis
Respiratory alkalosis
26
For oxygen sensitive patients, a reasonable target PaO2 is __ mmHg
50 mmHg
40 mmHg
80 mmHg
60 mmHg
27
The amount of air moved in and out of the lungs during normal breathing is called the ___.
Tidal Volume
ERV- Expiraoty reserve volume
IRV- inspiratory reserve volume
Residual Volume
28
Normal anatomic dead space ventilation per breath in a 200 lb adult is approximately ___ mL.
400 mL
800 mL
100 mL
200 mL
29
Oxygen therapy is most effective when hypoxemia is caused by ___ shunting
Anatomical
Relative
Absolute
Deadspace
30
Oxygen therapy can be most precisely delivered with ___ administration devices.
High flow
Low flow
31
Absolute shunting is characterized by a ___ response to oxygen therapy
Good
Poor
32
Hyperoxemia occurs when the PaO2 is over ___
60 mmHg
120 mmHg
80 mmHg
100 mmHg
33
The oxygenation ratio index used in 100% O2 test the ___ with FiO2 of 100%
PaO2/FiO2
P(A-a)O2
PaO2/PAO2
Qsp/QT
34
The volume of any breathing apparatus in which exhaled gas remains and is inspired on the next breath is called ___.
Reserve volume
Tidal volume
Relative dead space
Mechanical dead space
35
58 yom in ED. Hypoxic barrel chest, adventascious breath sounds, labored breathing and forced expiration. Diagnosis?
Asthma
CF
COPD
Pneumonia
36
CO has ___ times affinity for hemoglobin compare with oxygen.
235 times
255 times
265 times
245 times
37
The average ventilation-perfusion ratio in the lungs is approximately____.
0.4
0.8
0.2
0.6
38
SaO2 refers to ___ oxygen.
Dissolved
Combined
39
Nitric Oxide is used as a selective ___
Pulmonary vasoconstriction
Small airway dilator
Pulmonary vasodilator
40
In an individual with a normal breathing pattern, a nasal cannula set at 3 L/min delivers and FiO2 of approx ___.
.28
.40
.32
.24
41
The partial pressure of inspired oxygen will ___ as altitude increases.
Increase
Decrease
42
On the flat upper portion of the curve large changes in the PaO2 values are associated with ___ changes in SaO2
Large
Small
43
PaO2/FiO2 is called the ___ ratio.
Shunt
Ventilation
Perfusion
Oxygenation
44
The __ are major organs of acid excretion.
Kidneys
Lungs
45
At low PaO2 values small changes in the PaO2 are associated with ___ changes in the SaO2
Large
Small
46
The relationship between pH and [H+] is __.
Direct
Inverse
47
What are the normal values of PaO2/PaCO2
PaCO2: 22-26
PaO2: 88-100
PaO2: 80-100
PaCO2: 35-45
48
Bronchospasm and mucosal edema primarily affect pulmonary ___.
Compliance
Airway resistance
49
The symbol for the total volume of oxygen present in arterial blood is ___.
Hb
SaO2
PaO2
CaO2
50
Absolute shunting is characterized by a __ of chest radiograph
Darkening
White-out
51
The standardized index of oxyhemoglobin affinity is ___.
P50
P40
P30
P60
52
25 yof in ED. Pregnant and vomiting for 1 wk straight. Lethargic and confused. ECG shows arrythmias. What is on the ABG?
Respiratory Acidosis
Respiratory Alkalosis
Metabolic Alkalosis
Metabolic Acidois
53
When PaO2 falls below ___ mmHg, short term memory is altered and impaired judgment may be observed
55 mmHg
50 mmHg
65 mmHg
60 mmHg
54
Which system is considered the 1st line of defense in maintaining the acid base balance in the body?
Renal system
Chemical buffer system
Respiratory system
55
State the solubility coefficient for oxygen in the blood at 37 degree C.
0.006 mL
0.003 mL
1.34
98%
56
ACCP recommendations state that oxygen therapy is indicated when PaO2 is less than
60 mmHg; 90%
60 mmHg; 88%
50 mmHg and 90%
50 mmHg; 88%
57
32 yof dyspnea, chest pain, dizziness, RR 23. What is the ABG?
Respiratory Acidosis
Respiratory Alkalosis
Metabolic Alkalosis
Metabolic Acidosis
58
At residual volume, most gas entering the lungs would go to the __.
Bases
Apices
59
Each molecule of hemoglobin is capable of combining with ___ molecules of oxygen.
8
6
4
2
60
The normal anion gap values are __.
9-14 mEq/L
2-5 mEq/L
5-9 mEq/L
14-18 mEq/L
61
Factors known to alter the affinity of hemoglobin for oxygen
PaCO2
PaO2
pH
Temperature
62
Individuals with COPD __ particularly vulnerable to the respiratory effects of sedatives and and carcotics
Are
Are not
63
The volume of blood ejected by the heart each minute is called the ____.
Stroke volume
Cardiac index
Cardiac minute output
Heart rate
64
Increased PCO2 and temp shift the oxyhemoglobin curve to the ___ because Hb-O2 affinity is ___.
Right, increased
Right, decreased
Left, decreased
Left, increased
65
The percentage of available hemoglobin molecules that are carrying oxygen in arterial blood is symbolized as ___.
PaCO2
SvO2
PaO2
SaO2
66
The relationship btwn the CO, the O2 consumption and the diff in the arteriovenous oxygen content is expressed in __ eq.
Dalton’s law
Fick
Boyle’s law
Gary’s law
67
When you have ventilation but blood flow does not reach the alveoli is called what?
Anatomic shunt
Shunt like effect
Pulmonary shunt
Capillary shunt
68
__ patients are esp. susceptible to a decrease cardiac output after the initiation of PEEP.
Hypovolemic
Hypervolemic
69
Name two forms of absolute shunting
Variable
Capillary
Anatomic
70
Respiratory alkalosis disrupts acid base balance by __ blood carbonic acid.
Increasing
Depleting
71
52 yom with severe pneumonia. Pneumonia has consolidation on RLL led to absolute shunt. How can we fix this?
CPAP with PEEP of 5+
Nasal cannula at 3L
Do nothing. A SaO2 is noraml
Intubate and place on the vent
72
Respiratory Acidosis threatens acid base balance through the __ of carbonic acid
Accumilation
Loss
73
___ therapy is the most effective treatment for absolute shunting
PEEP
Oxygen
74
In acute congestive heart failure, cardiac output is likely best in the __ position
Sitting
Supine
75
___ oxygen administration systems have the most widespread use because of their simplicity and patient comfort.
Low flow
High flow
76
A patient with COPD in the ED. Blood gas shows PaO2 39 on RA. What should the FiO2 be to achieve a PaO2 of 60?
.24
.32
.28
.30
77
Calculate the transpulmonary pressure given an intrapulmonary pressure if 2cmH2O and an intrapleural pressure of -8cmH2O
10 cmH20
-10 cmH20
4 cmH20
-4 cmH2O
78
What is the V/Q ration of an ideal AC unit?
1:3
1:1
2:1