Question 1

After arterial blood has been drawn from a patient,which of the following should be done to the blood?

Accepted Answer

A)  Transported at 37° C 
B)  Processed after 5 minutes 
C)  Transported in an ice bath 
D)  Placed in the freezer until processed 
A)  Transported at 37° C 
B)  Processed after 5 minutes 
C)  Transported in an ice bath 
D)  Placed in the freezer until processed C

Question 2

Excessive nasogastric suction will cause what type of acid-base disorder?

Accepted Answer

A)  Acute metabolic alkalosis 
B)  Chronic respiratory acidosis 
C)  Uncompensated metabolic acidosis 
D)  Uncompensated respiratory alkalosis 
A)  Acute metabolic alkalosis 
B)  Chronic respiratory acidosis 
C)  Uncompensated metabolic acidosis 
D)  Uncompensated respiratory alkalosis A

Question 3

Shining a red light with a wavelength of 660 nm on a blood sample will cause which of the following?

Accepted Answer

A)  HHb will absorb less light than O₂Hb. 
B)  O₂Hb will absorb less light than HHb. 
C)  MetHb will absorb less light than O₂Hb. 
D)  Sulfhemoglobin will absorb more light than HHb. 
A)  HHb will absorb less light than O₂Hb. 
B)  O₂Hb will absorb less light than HHb. 
C)  MetHb will absorb less light than O₂Hb. 
D)  Sulfhemoglobin will absorb more light than HHb. B

Question 4

A patient on continuous pulse oximetry is receiving supplemental oxygen.Her SpO₂ has been 93% ± 2% for the past 12 hours.The pulse oximeter suddenly emits an alarm and reads 78%.A rapid assessment reveals central and peripheral cyanosis and shortness of breath.Which of the following is the appropriate immediate action?

Accepted Answer

A)  Take a stat arterial blood gas reading. 
B)  Recalibrate the pulse oximeter. 
C)  Change the pulse oximeter probe. 
D)  Decrease the supplemental oxygen. 
A)  Take a stat arterial blood gas reading. 
B)  Recalibrate the pulse oximeter. 
C)  Change the pulse oximeter probe. 
D)  Decrease the supplemental oxygen.

Question 5

The gold standard for quality control for PCO₂ and PO₂ electrodes is:

Accepted Answer

A)  capnography. 
B)  polarography. 
C)  tonometry. 
D)  anometry. 
A)  capnography. 
B)  polarography. 
C)  tonometry. 
D)  anometry.

Question 6

When an Allen test result is negative,blood for blood gas analysis should be drawn from which of the following sites?

Accepted Answer

A)  Earlobe 
B)  Radial artery 
C)  Brachial artery 
D)  Side of the heel 
A)  Earlobe 
B)  Radial artery 
C)  Brachial artery 
D)  Side of the heel

Question 7

A fluorescent sensor can measure which range of pH values?

Accepted Answer

A)  6.0 to 7.5 
B)  6.5 to 7.5 
C)  6.8 to 7.8 
D)  7.0 to 8.0 
A)  6.0 to 7.5 
B)  6.5 to 7.5 
C)  6.8 to 7.8 
D)  7.0 to 8.0

Question 8

Erroneous PCO₂ measurements can be caused by which of the following?
1)A worn electrode
2)A cracked electrode
3)Wearing out of the silver anode
4)Increased temperature of the patient
5)Dehydration of bicarbonate solution

Accepted Answer

A)  1 and 5 
B)  2 and 3 
C)  3 and 4 
D)  1,2,and 5 
A)  1 and 5 
B)  2 and 3 
C)  3 and 4 
D)  1,2,and 5

Question 9

Which chemical reaction occurs within the Stow-Severinghaus electrode?

Accepted Answer

A)  CO₂ + H₂O H₂CO₃ H⁺ + HCO₃- 
B)  O₂ + 2H₂O + 4e- 4OH- 
C)  4Ag→ 4Ag⁺ + 4e- 
D)  EH⁺ = 0.0615 * pH 
A)  CO₂ + H₂O H₂CO₃ H⁺ + HCO₃- 
B)  O₂ + 2H₂O + 4e- 4OH- 
C)  4Ag→ 4Ag⁺ + 4e- 
D)  EH⁺ = 0.0615 * pH

Question 10

Approximate the corresponding saturation for a PaO₂ of 80 mm Hg under normal acid-base conditions by using the oxyhemoglobin dissociation curve in the figure.

Accepted Answer

A)  80% 
B)  85% 
C)  90% 
D)  95% 
A)  80% 
B)  85% 
C)  90% 
D)  95%

Question 11

Exposure of a Clark electrode to gaseous anesthetic agents such as nitrous oxide will cause which of the following to occur?

Accepted Answer

A)  The pH will increase. 
B)  The electrode will function normally. 
C)  There will be an increase in the production of peroxide ions. 
D)  The carbon dioxide in the blood will increase and cause an erroneous reading. 
A)  The pH will increase. 
B)  The electrode will function normally. 
C)  There will be an increase in the production of peroxide ions. 
D)  The carbon dioxide in the blood will increase and cause an erroneous reading.

Question 12

Which of the following represents the technique used to measure current changes that occur when oxygen is reduced?

Accepted Answer

A)  Blood gas factor 
B)  Potentiometric 
C)  Amperometric 
D)  Tonometry 
A)  Blood gas factor 
B)  Potentiometric 
C)  Amperometric 
D)  Tonometry

Question 13

A voltage difference of 18.7 mV is measured when a blood sample is being analyzed for pH.What is the resultant pH of the blood?

Accepted Answer

A)  7.54 
B)  7.34 
C)  7.14 
D)  8.71 
A)  7.54 
B)  7.34 
C)  7.14 
D)  8.71

Question 14

A standard pH electrode includes which of the following?

Accepted Answer

A)  Nylon spacer 
B)  Silver anode 
C)  Mercury bead 
D)  Silicon elastic membrane 
A)  Nylon spacer 
B)  Silver anode 
C)  Mercury bead 
D)  Silicon elastic membrane

Question 15

Which of the following is true concerning the typical point-of-care blood gas analyzer?

Accepted Answer

A)  It is only able to measure pH, PaCO₂, and PaO₂. 
B)  It measures actual hemoglobin oxygen saturation. 
C)  It uses silicone chips with microelectrodes. 
D)  It requires 1 to 2 mL of blood. 
A)  It is only able to measure pH, PaCO₂, and PaO₂. 
B)  It measures actual hemoglobin oxygen saturation. 
C)  It uses silicone chips with microelectrodes. 
D)  It requires 1 to 2 mL of blood.

Question 16

A patient is being treated with dapsone,an antibiotic,for P.carinii infection.Which of the following ways of measuring oxygen saturation would be most appropriate?

Accepted Answer

A)  In vivo blood gas monitoring 
B)  In vitro blood gas monitoring 
C)  Pulse oximetry 
D)  CO-oximetry 
A)  In vivo blood gas monitoring 
B)  In vitro blood gas monitoring 
C)  Pulse oximetry 
D)  CO-oximetry

Question 17

Which device allows in vitro arterial blood gas and pH measurements in a transport vehicle?

Accepted Answer

A)  CO-oximeter 
B)  Pulse oximeter 
C)  Plethysmograph 
D)  Point-of-care analyzer 
A)  CO-oximeter 
B)  Pulse oximeter 
C)  Plethysmograph 
D)  Point-of-care analyzer

Question 18

Which of the following would create the lowest P₅₀?

Accepted Answer

A)  pH = 7.26 
B)  pH = 7.35 
C)  PCO₂ = 32 mm Hg 
D)  Temperature = 39° C 
A)  pH = 7.26 
B)  pH = 7.35 
C)  PCO₂ = 32 mm Hg 
D)  Temperature = 39° C

Question 19

The Siggaard-Andersen alignment nomogram is used for which of the following?

Accepted Answer

A)  Calculating pH 
B)  Measuring PCO₂ 
C)  Calculating sodium (Na+), potassium (K+), chloride (Cl-), and calcium (Ca++) 
D)  Calculating actual and standard bicarbonate 
A)  Calculating pH 
B)  Measuring PCO₂ 
C)  Calculating sodium (Na+), potassium (K+), chloride (Cl-), and calcium (Ca++) 
D)  Calculating actual and standard bicarbonate

Question 20

Hydrogen ion activity can be expressed as which of the following?

Accepted Answer

A)  pH = log10[H-] 
B)  [H+] = log * 10 
C)  pH = -log10[H+] 
D)  pH = 1 * 10-7 mol/L 
A)  pH = log10[H-] 
B)  [H+] = log * 10 
C)  pH = -log10[H+] 
D)  pH = 1 * 10-7 mol/L

After arterial blood has been drawn from a patient,which of the following should be done to the blood?

Excessive nasogastric suction will cause what type of acid-base disorder?

Shining a red light with a wavelength of 660 nm on a blood sample will cause which of the following?

The gold standard for quality control for PCO₂ and PO₂ electrodes is:

When an Allen test result is negative,blood for blood gas analysis should be drawn from which of the following sites?

A fluorescent sensor can measure which range of pH values?

Erroneous PCO₂ measurements can be caused by which of the following? 1)A worn electrode 2)A cracked electrode 3)Wearing out of the silver anode 4)Increased temperature of the patient 5)Dehydration of bicarbonate solution

Which chemical reaction occurs within the Stow-Severinghaus electrode?

Approximate the corresponding saturation for a PaO₂ of 80 mm Hg under normal acid-base conditions by using the oxyhemoglobin dissociation curve in the figure.

Exposure of a Clark electrode to gaseous anesthetic agents such as nitrous oxide will cause which of the following to occur?

Which of the following represents the technique used to measure current changes that occur when oxygen is reduced?

A voltage difference of 18.7 mV is measured when a blood sample is being analyzed for pH.What is the resultant pH of the blood?

A standard pH electrode includes which of the following?

Which of the following is true concerning the typical point-of-care blood gas analyzer?

A patient is being treated with dapsone,an antibiotic,for P.carinii infection.Which of the following ways of measuring oxygen saturation would be most appropriate?

Which device allows in vitro arterial blood gas and pH measurements in a transport vehicle?

Which of the following would create the lowest P₅₀?

The Siggaard-Andersen alignment nomogram is used for which of the following?

Hydrogen ion activity can be expressed as 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

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Exam 10: Blood Gas Monitoring

After arterial blood has been drawn from a patient,which of the following should be done to the blood?

Excessive nasogastric suction will cause what type of acid-base disorder?

Shining a red light with a wavelength of 660 nm on a blood sample will cause which of the following?

The gold standard for quality control for PCO₂ and PO₂ electrodes is:

When an Allen test result is negative,blood for blood gas analysis should be drawn from which of the following sites?

A fluorescent sensor can measure which range of pH values?

Erroneous PCO₂ measurements can be caused by which of the following? 1)A worn electrode 2)A cracked electrode 3)Wearing out of the silver anode 4)Increased temperature of the patient 5)Dehydration of bicarbonate solution

Which chemical reaction occurs within the Stow-Severinghaus electrode?

Approximate the corresponding saturation for a PaO₂ of 80 mm Hg under normal acid-base conditions by using the oxyhemoglobin dissociation curve in the figure.

Exposure of a Clark electrode to gaseous anesthetic agents such as nitrous oxide will cause which of the following to occur?

Which of the following represents the technique used to measure current changes that occur when oxygen is reduced?

A voltage difference of 18.7 mV is measured when a blood sample is being analyzed for pH.What is the resultant pH of the blood?

A standard pH electrode includes which of the following?

Which of the following is true concerning the typical point-of-care blood gas analyzer?

A patient is being treated with dapsone,an antibiotic,for P.carinii infection.Which of the following ways of measuring oxygen saturation would be most appropriate?

Which device allows in vitro arterial blood gas and pH measurements in a transport vehicle?

Which of the following would create the lowest P₅₀?

The Siggaard-Andersen alignment nomogram is used for which of the following?

Hydrogen ion activity can be expressed as 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