3.7.1 Arterial Blood Gas Analysis Flashcards by Miguel Acosta | Brainscape

Q

Specimen for ABGA?

A

Arterial blood

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Q

Arterial blood collected WITH tourniquet in ________ sterile glass syringe

T or F

a. 3 to 5 mL
b. 1 to 3 mL
c. 2 to 4 mL

A

F (Without)

b

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Q

Preferred site for Arterial blood collection?

A

Radial

then Brachial, Femoral

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Q

Anticoagulant for ABG?

A

Lyophilized heparin (0.05mL heparin / mL of blood)

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Q

ABG requires ANAEROBIC collection that is kept on ICE to RETARD WBC metabolism

T or F

A

T

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Q

ABG should be assayed within

a. 10 mins
b. 15 mins
c. 20 mins

A

b

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Q

Blood gas instrumentations:

The following uses an electrode except:

a. pH
b. pCO2
c. pO2
d. SaO2

A

d - Uses CO-oximeter

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Q

Blood gas instrumentations:

Principle: Potentiometry

a. pH
b. pCO2
c. pO2
d. SaO2

A

a and b

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Q

Blood gas instrumentations:

Principle: Amperometry

a. pH
b. pCO2
c. pO2
d. SaO2

A

c

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Q

Blood gas instrumentations:

Principle: Spectrophotometric measurement

a. pH
b. pCO2
c. pO2
d. SaO2

A

d

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Q

Blood gas instrumentations:

Calibration:

2 phosphate buffers of known pH stored anaerobically at room temperature

a. pH
b. pCO2
c. pO2
d. SaO2

A

a

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Q

Blood gas instrumentations:

Calibration:

2 gases of known pO2

a. pH
b. pCO2
c. pO2
d. SaO2

A

c

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Q

Blood gas instrumentations:

Calibration:

Specimen 0% with 100% of _____

a. pH
b. pCO2
c. pO2
d. SaO2

A

d

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Q

Blood gas instrumentations:

Calibration:

2 known gases of pCO2

a. pH
b. pCO2
c. pO2
d. SaO2

A

b

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Q

Reference Range and Panic values:

Ref Range:

7.35-7.45

a. pH
b. pCO2
c. pO2
d. SaO2

A

a

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Q

Reference Range and Panic values:

Ref Range:

> 95%

a. pH
b. pCO2
c. pO2
d. SaO2

A

d

Q

Reference Range and Panic values:

Ref Range:

35-45 mmHg

a. pH
b. pCO2
c. pO2
d. SaO2

A

b

Q

Reference Range and Panic values:

Ref Range:

80-110 mmHg

a. pH
b. pCO2
c. pO2
d. SaO2

A

c

Q

Reference Range and Panic values:

Panic Values:

≤ 7.2, ≥ 7.6

a. pH
b. pCO2
c. pO2
d. SaO2

A

a

Q

Reference Range and Panic values:

Panic Values:

<40 mmHg

a. pH
b. pCO2
c. pO2
d. SaO2

A

c

Q

Reference Range and Panic values:

Panic Values:

≤20, ≥60 mmHg

a. pH
b. pCO2
c. pO2
d. SaO2

A

b

Q

Reference Range and Panic values:

Panic Values:

N/A

a. pH
b. pCO2
c. pO2
d. SaO2

A

d

Q

Reference Range and Panic values:

Ref Range:

(-2) - (+2)

a. HCO3
b. Total CO2
c. BE

A

c

Q

Reference Range and Panic values:

Ref Range:

22-26 mmol/L

a. HCO3
b. Total CO2
c. BE

A

a

Q

Reference Range and Panic values:

Ref Range:

23-27 mmol/L

a. HCO3
b. Total CO2
c. BE

A

b

Q

Reference Range and Panic values:

Panic Values:

≤10, ≥40 mmol/L

a. HCO3
b. Total CO2
c. BE

A

a

Q

Reference Range and Panic values:

Panic Values:

N/A

a. HCO3
b. Total CO2
c. BE

A

b and C

Q

Factors that affect ABG values

In Oxyhemoglobin Dissociation Curve:

Causes of shift to the right includes:
- _______ pCO2
- ______ pH (Acid or Alkaline)
- Increase 2,3 DPG
- Exercise (Excessive
- ______ temp

A

Increase

Acid

Increase

(Mnemonics: CADET)

Q

Factors that affect ABG values

In temperature

Electrode chambers of blood gas analyzers are thermostatically
controlled at ________°C

a. 37 ± 0.4
b. 37 ± 0.2
c. 37 ± 0.1
d. 37 ± 0.3

A

c

Q

Factors that affect ABG values

In temperature

Every 1°C increase in body temperature causes:

pCO2 __________ by 3%
pO2 decreases by ___
pH _________ by 0.015 unit

These are consistent with CADET

A

Increases

7%

Decreases

Q

Factors that affect ABG values

Specimen exposure to air:

AVOID formation of bubbles since atmospheric air contains ________ O2 level and _______ CO2 level

This is the opposite of CADET

A

Increase

Decrease

Q

Factors that affect ABG values

Prolonged Storage of Specimen:

Stand for more than _____ mins will undergo metabolism which produces _______ that LOWERS the pH

A

30

Lactate

Q

Factors that affect ABG values

Prolonged Storage of Specimen:

Since the cells continue to metabolize, oxygen will _________, and CO2 will be released as a byproduct of metabolism

A

be depleted (Decrease)

Q

Factors that affect ABG values

Excess anticoagulant:

Increase DRY heparin: ____ pH
Increase LIQUID heparin: ____ pCO2

A

Both decrease

Q

Factors that affect ABG values

Excess anticoagulant:

Heparin is an acidic polysaccharide

T or F

A

T

Q

↓ pCO2, ↑ pO2, ↓ pH

a. Specimen exposure to air
b. Prolonged storage of specimen

A

a

Q

↑ pCO2, ↓ pO2, ↓ pH

a. Specimen exposure to air
b. Prolonged storage of specimen

A

b