ABG Blood Interpretation Notes with Latest Structured Questions and Correct Detailed Answers Already Rated and A Graded

ABG Blood Interpretation Notes with Latest Structured
Questions and Correct Detailed Answers Already Rated
and A Graded



List 3 common arterialblood sampling sites. -
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xz CORRECT ANSWER >>>The arterialblood sample may be obtained from the radial, dorsalis xz xz xz xz xz xz xz xz xz xz xz xz




xz pedis, brachial, or femoral arteries in the adult.
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Describe the procedure for doing the modified Allen's Test. -xz xz xz xz xz xz xz xz xz




CORRECT ANSWER >>>To perform this test, the clinician instructs the patient to make a tig
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ht fist. Then compress both the radial and ulnar arteries. Now instruct the patient to open and relax
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his fist, revealing a blanched palm and fingers. Then release the pressure over the ulnar artery whil
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz




e observing the patient's palm for changes in color. If collateral flow is adequate, the patient's han
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz




d will "pink up" within 10 to 15 seconds; this constitutes a positive Allen's test. A positive result docu
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ments that collateral blood flow is adequate and that the radial artery is an acceptable puncture site.
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If the test is negative (the palm does not pink up rapidly), the radial artery is not an acceptable site f
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or puncture. In such cases, the other wrist is evaluated or the brachial artery is used for the puncture
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site.



Why isit important to remove air bubblesfromthe sample? -
xz xz xz xz xz xz xz xz xz xz xz




xz CORRECT ANSWER >>>The oxygen and CO2 gas tensions of the bubbles may equilibrate xz xz xz xz xz xz xz xz xz xz xz xz xz




with the blood and result in erroneous measurements.
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How long should pressure be applied to the puncture site? -
xz xz xz xz xz xz xz xz xz xz




CORRECTANSWER >>>After the needle is withdrawn, the wound should be pressurized fo
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r a period of at least 3 to 5 minutes or longer, if clotting problems exist.
xz xz xz xz xz xz xz xz xz xz xz xz xz xz xz




1|Page xz xz xz xz xz

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,Listthemeasurements that areused toassess oxygen s
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tatus acid-base xz




balance

adequacyof ventilation - xz xz xz




xz CORRECT ANSWER >>>The measurements obtained from analysis of arterial and mixed ven xz xz xz xz xz xz xz xz xz xz xz




ous blood samples are useful in evaluating the following:
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• Acid-base balance (pH, Paco2, HCO3−, base excess) xz xz xz xz xz xz




• Oxygenation status (Pao2, Sao2, Cao2, Pv¯o2) xz xz xz xz xz




• Adequacyof ventilation (Paco2) xz xz xz




Listthenormal valuesfor thefollowing Pa
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O2

PAO2 - xz




CORRECT ANSWER >>>PartialPressure of Oxygen in Arterial Blood NORMAL VALU
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E: approximately 80 to 100 mm Hg in room air
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Partial Alveolar Oxygen Difference NOR xz xz xz xz




MAL VALUE: 100 torr xz xz xz




Calculate the PAO2 given the following information FiO xz xz xz xz xz xz xz




2=0.40

Pb = 747 mm Hg xz xz xz xz




PaCO2 =40 mm Hg- CORRECT ANSWER >>>PAO2 = (PB- PH2O)FIO2-PaCO2(1.25)
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3|Page
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, = (747 mm Hg - 47 mm Hg)0.40 - 40 mm Hg(1.25)
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4|Page
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