Question 1

What is responsible for the conversion of glucose to hydrogen peroxide and gluconic acid on the surface of the glucose electrode?

Accepted Answer

A)  Hydrogen peroxide 
B)  Phosphodiesterase 
C)  Glucagon oxidase 
D)  Glucose oxidase 
A)  Hydrogen peroxide 
B)  Phosphodiesterase 
C)  Glucagon oxidase 
D)  Glucose oxidase

Question 2

Which size of scalp vein needle should be used to draw arterial blood from an infant?

Accepted Answer

A)  22 gauge 
B)  24 gauge 
C)  26 gauge 
D)  28 gauge 
A)  22 gauge 
B)  24 gauge 
C)  26 gauge 
D)  28 gauge

Question 3

A patient with a bilirubin level of 28 mg/dL has arterial blood drawn for CO-oximetry.The respiratory therapist should expect a(n)_____ measurement.

Accepted Answer

A)  Accurate O₂Hb 
B)  Lower-than-actual O₂Hb 
C)  Higher-than-actual O₂Hb 
D)  Higher-than-actual HbCO 
A)  Accurate O₂Hb 
B)  Lower-than-actual O₂Hb 
C)  Higher-than-actual O₂Hb 
D)  Higher-than-actual HbCO

Question 4

Which of the following variables are measured directly by a blood gas machine?
1)pH
2)PaO₂
3)HCO₃-
4)SaO₂

Accepted Answer

A)  1 and 2 
B)  2 and 3 
C)  3 and 4 
D)  1 and 4 
A)  1 and 2 
B)  2 and 3 
C)  3 and 4 
D)  1 and 4

Question 5

Which of the following statements are true concerning in vivo arterial blood gas analyzers?

Accepted Answer

A)  They incorporate a polarographic electrode. 
B)  The operating principle is light transmission. 
C)  Temperature correction is unnecessary. 
D)  They are more accurate than in vitro blood gas analyzers. 
A)  They incorporate a polarographic electrode. 
B)  The operating principle is light transmission. 
C)  Temperature correction is unnecessary. 
D)  They are more accurate than in vitro blood gas analyzers.

Question 6

What type of calibration should be performed after an electrode is changed?

Accepted Answer

A)  Quality control 
B)  Three-point 
C)  Two-point 
D)  One-point 
A)  Quality control 
B)  Three-point 
C)  Two-point 
D)  One-point

Question 7

Which of the following are the most common sites for the percutaneous sampling of arterial blood for blood gas analysis?
1)Earlobe
2)Radial artery
3)Brachial artery
4)Side of the heel

Accepted Answer

A)  1 and 2 
B)  2 and 3 
C)  3 and 4 
D)  1 and 4 
A)  1 and 2 
B)  2 and 3 
C)  3 and 4 
D)  1 and 4

Question 8

Optical shunting during pulse oximetry may be caused by which of the following?

Accepted Answer

A)  Dark skin pigmentation 
B)  Light skin pigmentation 
C)  Hyperbilirubinemia 
D)  Hyponatremia 
A)  Dark skin pigmentation 
B)  Light skin pigmentation 
C)  Hyperbilirubinemia 
D)  Hyponatremia

Question 9

Which of the following statements is true concerning the operation of a transcutaneous carbon dioxide electrode?

Accepted Answer

A)  PtcCO₂ readings are slightly lower than the PaCO₂ value. 
B)  Electrodes should be calibrated when they are repositioned. 
C)  Heating the transcutaneous PCO₂ (PtcCO₂) to 43°C will adversely affect its operation. 
D)  Before its use, the electrode should be calibrated to 20% and 40% CO₂. 
A)  PtcCO₂ readings are slightly lower than the PaCO₂ value. 
B)  Electrodes should be calibrated when they are repositioned. 
C)  Heating the transcutaneous PCO₂ (PtcCO₂) to 43°C will adversely affect its operation. 
D)  Before its use, the electrode should be calibrated to 20% and 40% CO₂.

Question 10

Which of the following statements is true concerning capillary blood gases?

Accepted Answer

A)  They can be drawn from an earlobe. 
B)  They coincide with arterial blood gases. 
C)  They can be drawn from a peripheral artery. 
D)  They require the performance of an Allen test. 
A)  They can be drawn from an earlobe. 
B)  They coincide with arterial blood gases. 
C)  They can be drawn from a peripheral artery. 
D)  They require the performance of an Allen test.

Question 11

Which of the following are true if a patient has a PaO₂ of 155 mm Hg?
1)The patient has mild hypoxemia.
2)The patient has an overcorrected PaO₂.
3)The patient is in need of supplemental oxygen.
4)The patient is receiving supplemental oxygen therapy.

Accepted Answer

A)  1 and 3 
B)  2 and 4 
C)  1 and 4 
D)  2 and 3 
A)  1 and 3 
B)  2 and 4 
C)  1 and 4 
D)  2 and 3

Question 12

The reference half-cell of a pH analyzer is composed of:

Accepted Answer

A)  silver anode. 
B)  platinum cathode. 
C)  silver-silver chloride. 
D)  mercury-mercurous chloride. 
A)  silver anode. 
B)  platinum cathode. 
C)  silver-silver chloride. 
D)  mercury-mercurous chloride.

Question 13

Measurement of oxygen saturation by a pulse oximeter can be adversely affected by which of the following?
1)Hypobilirubinemia
2)Peripheral vasodilation
3)Hypothermia
4)Dapsone

Accepted Answer

A)  1 and 2 
B)  2 and 3 
C)  3 and 4 
D)  1 and 4 
A)  1 and 2 
B)  2 and 3 
C)  3 and 4 
D)  1 and 4

Question 14

Which is the correct interpretation of the following values: pH = 7.36; PaCO₂ = 22 mm Hg; and HCO₃- = 12 mEq/L?

Accepted Answer

A)  Combined alkalosis 
B)  Combined acidosis 
C)  Compensated respiratory alkalosis 
D)  Compensated metabolic acidosis 
A)  Combined alkalosis 
B)  Combined acidosis 
C)  Compensated respiratory alkalosis 
D)  Compensated metabolic acidosis

Question 15

To produce capillary vasodilatation below the surface of a transcutaneous PO₂ electrode,which of the following should be done to the electrode?

Accepted Answer

A)  Icing to 0° C 
B)  Heating to 44° C 
C)  Cooling to 25° C 
D)  Warming to 35° C 
A)  Icing to 0° C 
B)  Heating to 44° C 
C)  Cooling to 25° C 
D)  Warming to 35° C

Question 16

Which of the following are true concerning pH?
1)A blood pH = 7.50 is alkaline.
2)A blood pH 7.40 is acidotic.
4)A blood pH = 7.30 is acidotic.

Accepted Answer

A)  1 and 2 
B)  2 and 3 
C)  3 and 4 
D)  1 and 4 
A)  1 and 2 
B)  2 and 3 
C)  3 and 4 
D)  1 and 4

Question 17

A left shift in the oxyhemoglobin dissociation curve is caused by:

Accepted Answer

A)  methemoglobin. 
B)  acute acidosis. 
C)  increased temperature. 
D)  high 2,3-diphosphoglycerate (2,3-DPG). 
A)  methemoglobin. 
B)  acute acidosis. 
C)  increased temperature. 
D)  high 2,3-diphosphoglycerate (2,3-DPG).

Question 18

The blood gas factor results from the:

Accepted Answer

A)  Slow rate of oxygen diffusion in fluids. 
B)  Slow rate of carbon dioxide diffusion in blood. 
C)  Amount of carbon dioxide necessary to change the pH by 0.01. 
D)  Quantity of electrons that need to be added to the silver anode to reduce oxygen. 
A)  Slow rate of oxygen diffusion in fluids. 
B)  Slow rate of carbon dioxide diffusion in blood. 
C)  Amount of carbon dioxide necessary to change the pH by 0.01. 
D)  Quantity of electrons that need to be added to the silver anode to reduce oxygen.

Question 19

Which of the following devices should be used for noninvasive monitoring of oxygen tension of a premature newborn?

Accepted Answer

A)  In vivo PO₂ 
B)  Pulse oximetry 
C)  Point-of-care PO₂ 
D)  Transcutaneous PO₂ 
A)  In vivo PO₂ 
B)  Pulse oximetry 
C)  Point-of-care PO₂ 
D)  Transcutaneous PO₂

Question 20

Placing blood gas samples in an ice bath serves to do which of the following?

Accepted Answer

A)  Keep the specimen cold. 
B)  Slow down in vitro metabolism. 
C)  Allow the red blood cells to remain intact. 
D)  Prevent the white blood cells from destroying the red blood cells. 
A)  Keep the specimen cold. 
B)  Slow down in vitro metabolism. 
C)  Allow the red blood cells to remain intact. 
D)  Prevent the white blood cells from destroying the red blood cells.

What is responsible for the conversion of glucose to hydrogen peroxide and gluconic acid on the surface of the glucose electrode?

Which size of scalp vein needle should be used to draw arterial blood from an infant?

A patient with a bilirubin level of 28 mg/dL has arterial blood drawn for CO-oximetry.The respiratory therapist should expect a(n)_____ measurement.

Which of the following variables are measured directly by a blood gas machine? 1)pH 2)PaO₂ 3)HCO₃- 4)SaO₂

Which of the following statements are true concerning in vivo arterial blood gas analyzers?

What type of calibration should be performed after an electrode is changed?

Which of the following are the most common sites for the percutaneous sampling of arterial blood for blood gas analysis? 1)Earlobe 2)Radial artery 3)Brachial artery 4)Side of the heel

Optical shunting during pulse oximetry may be caused by which of the following?

Which of the following statements is true concerning the operation of a transcutaneous carbon dioxide electrode?

Which of the following statements is true concerning capillary blood gases?

Which of the following are true if a patient has a PaO₂ of 155 mm Hg? 1)The patient has mild hypoxemia. 2)The patient has an overcorrected PaO₂. 3)The patient is in need of supplemental oxygen. 4)The patient is receiving supplemental oxygen therapy.

The reference half-cell of a pH analyzer is composed of:

Measurement of oxygen saturation by a pulse oximeter can be adversely affected by which of the following? 1)Hypobilirubinemia 2)Peripheral vasodilation 3)Hypothermia 4)Dapsone

Which is the correct interpretation of the following values: pH = 7.36; PaCO₂ = 22 mm Hg; and HCO₃- = 12 mEq/L?

To produce capillary vasodilatation below the surface of a transcutaneous PO₂ electrode,which of the following should be done to the electrode?

Which of the following are true concerning pH? 1)A blood pH = 7.50 is alkaline. 2)A blood pH <7.40 is alkaline. 3)A blood pH >7.40 is acidotic. 4)A blood pH = 7.30 is acidotic.

A left shift in the oxyhemoglobin dissociation curve is caused by:

The blood gas factor results from the:

Which of the following devices should be used for noninvasive monitoring of oxygen tension of a premature newborn?

Placing blood gas samples in an ice bath serves to do which of the following?

Basic Physics for the Respiratory Therapist

Principles of Infection Control

Manufacture, Storage, and Transport of Medical Gases

Administering Medical Gases: Regulators, Flowmeters, and

Airway Management Devices and Advanced Cardiac Life Support

Humidity and Aerosol Therapy

Lung Expansion Therapy Devices

Assessment of Pulmonary Function

Assessment of Cardiovascular Function

Sleep Diagnostics

Introduction to Ventilators

Mechanical Ventilators: General-Use Devices

Infant and Pediatric Devices

Transport, Home Care, and Noninvasive Ventilatory Devices

Filters

Exam 10: Blood Gas Monitoring

What is responsible for the conversion of glucose to hydrogen peroxide and gluconic acid on the surface of the glucose electrode?

Which size of scalp vein needle should be used to draw arterial blood from an infant?

A patient with a bilirubin level of 28 mg/dL has arterial blood drawn for CO-oximetry.The respiratory therapist should expect a(n)_____ measurement.

Which of the following variables are measured directly by a blood gas machine? 1)pH 2)PaO₂ 3)HCO₃- 4)SaO₂

Which of the following statements are true concerning in vivo arterial blood gas analyzers?

What type of calibration should be performed after an electrode is changed?

Which of the following are the most common sites for the percutaneous sampling of arterial blood for blood gas analysis? 1)Earlobe 2)Radial artery 3)Brachial artery 4)Side of the heel

Optical shunting during pulse oximetry may be caused by which of the following?

Which of the following statements is true concerning the operation of a transcutaneous carbon dioxide electrode?

Which of the following statements is true concerning capillary blood gases?

Which of the following are true if a patient has a PaO₂ of 155 mm Hg? 1)The patient has mild hypoxemia. 2)The patient has an overcorrected PaO₂. 3)The patient is in need of supplemental oxygen. 4)The patient is receiving supplemental oxygen therapy.

The reference half-cell of a pH analyzer is composed of:

Measurement of oxygen saturation by a pulse oximeter can be adversely affected by which of the following? 1)Hypobilirubinemia 2)Peripheral vasodilation 3)Hypothermia 4)Dapsone

Which is the correct interpretation of the following values: pH = 7.36; PaCO₂ = 22 mm Hg; and HCO₃- = 12 mEq/L?

To produce capillary vasodilatation below the surface of a transcutaneous PO₂ electrode,which of the following should be done to the electrode?

Which of the following are true concerning pH? 1)A blood pH = 7.50 is alkaline. 2)A blood pH <7.40 is alkaline. 3)A blood pH >7.40 is acidotic. 4)A blood pH = 7.30 is acidotic.

A left shift in the oxyhemoglobin dissociation curve is caused by:

The blood gas factor results from the:

Which of the following devices should be used for noninvasive monitoring of oxygen tension of a premature newborn?

Placing blood gas samples in an ice bath serves to do which of the following?

Basic Physics for the Respiratory Therapist

Principles of Infection Control

Manufacture, Storage, and Transport of Medical Gases

Administering Medical Gases: Regulators, Flowmeters, and

Airway Management Devices and Advanced Cardiac Life Support

Humidity and Aerosol Therapy

Lung Expansion Therapy Devices

Assessment of Pulmonary Function

Assessment of Cardiovascular Function

Sleep Diagnostics

Introduction to Ventilators

Mechanical Ventilators: General-Use Devices

Infant and Pediatric Devices

Transport, Home Care, and Noninvasive Ventilatory Devices

Filters