RESPIRATORY CARE FUNDAMENTALS 2 - EXAM 2
REVIEW UPDATED ACTUAL QUESTIONS AND CORRECT
ANSWERS
Question:
What are the indications for using pulse oximetry?
Answer:
-To monitor arterial oxyhemoglobin saturation during patient care.
-To assess the response of arterial oxyhemoglobin saturation to interventions
or diagnostic procedures.
-Continuous monitoring of all patients in intensive care units.
Question:
List the contraindications for pulse oximetry.
Answer:
-It does not replace the need for direct measurements of pH, PaCO2, and total
hemoglobin.
-Abnormal hemoglobin may be a relative contraindication.
Question:
What are the hazards associated with pulse oximetry?
Answer:
-False negative results for hypoxemia.
-False positive results for normoxemia or hyperoxemia.
-Improper treatment based on false results.
-Inaccurate readings in the
presence of carboxyhemoglobin or methemoglobin.
-Motion artifact
-Low perfusion
-Ambient light interference.
Question:
Why is pulse oximetry used in clinical practice?
Answer:
-It measures oxygen saturation and heart rate non-invasively.
-It provides quick readings to detect cardiopulmonary issues.
-It's a point-of-care device for convenient bedside monitoring.
Question:
What are some indications for continuous pulse oximetry monitoring?
Answer:
-Patients requiring constant oxygen saturation measurement, such as those in
ICU, NICU, or PICU.
-Unstable patients, those experiencing desaturations during sleep, or un-
dergoing procedures like bronchoscopy.
Question:
Describe the relationship between PaO2 values and SaO2 thresholds.
, Answer:
-Mild hypoxemia: PaO2 < 80mmHg, SaO2 90-94%
-Moderate hypoxemia: PaO2 < 60mmHg, SaO2 75-89%
-Severe hypoxemia: PaO2 < 40mmHg, SaO2 < 75%
-A SpO2 threshold of 92% indicates a need for oxygen therapy.
Question:
What conditions can affect the accuracy of pulse oximetry readings?
Answer:
-Motion artifact
-Dark skin pigmentation
-Nail polish
-Low perfusion
-Ambient light interference.
-Presence of carboxyhemoglobin or methemoglobin.
-Abnormal hemoglobin,
such as fetal hemoglobin or anemia.
Question:
How can problems with pulse oximetry be resolved?
Answer:
-Repositioning the probe, alternating the probe site, or removing ambient light
sources or nail polish.
-For dark-skinned individuals, adjust the oximeter low alarm 3% to 5%
high-er.
-Use pulse co-oximeters for more accurate measurements in certain situations.
Question:
What are the key points for performing pulse oximetry?
Answer:
-Follow manufacturer's protocol, ensure correct sensor size and placement.
-Validate readings against actual SaO2 whenever possible.
-Clean and disinfect sensors between patients and document all
measurements in patient records.
Question:
Can a pulse oximeter provide accurate readings in all situations?
Answer:
No, there are limitations and factors that can affect accuracy, such as:
-Motion artifact
-Dark skin pigmentation
-Abnormal hemoglobin levels.
Question:
What is the primary purpose of peak flow measurements?
Answer:
To assess expiratory flow rates.
Question:
Why is peak flow used?
REVIEW UPDATED ACTUAL QUESTIONS AND CORRECT
ANSWERS
Question:
What are the indications for using pulse oximetry?
Answer:
-To monitor arterial oxyhemoglobin saturation during patient care.
-To assess the response of arterial oxyhemoglobin saturation to interventions
or diagnostic procedures.
-Continuous monitoring of all patients in intensive care units.
Question:
List the contraindications for pulse oximetry.
Answer:
-It does not replace the need for direct measurements of pH, PaCO2, and total
hemoglobin.
-Abnormal hemoglobin may be a relative contraindication.
Question:
What are the hazards associated with pulse oximetry?
Answer:
-False negative results for hypoxemia.
-False positive results for normoxemia or hyperoxemia.
-Improper treatment based on false results.
-Inaccurate readings in the
presence of carboxyhemoglobin or methemoglobin.
-Motion artifact
-Low perfusion
-Ambient light interference.
Question:
Why is pulse oximetry used in clinical practice?
Answer:
-It measures oxygen saturation and heart rate non-invasively.
-It provides quick readings to detect cardiopulmonary issues.
-It's a point-of-care device for convenient bedside monitoring.
Question:
What are some indications for continuous pulse oximetry monitoring?
Answer:
-Patients requiring constant oxygen saturation measurement, such as those in
ICU, NICU, or PICU.
-Unstable patients, those experiencing desaturations during sleep, or un-
dergoing procedures like bronchoscopy.
Question:
Describe the relationship between PaO2 values and SaO2 thresholds.
, Answer:
-Mild hypoxemia: PaO2 < 80mmHg, SaO2 90-94%
-Moderate hypoxemia: PaO2 < 60mmHg, SaO2 75-89%
-Severe hypoxemia: PaO2 < 40mmHg, SaO2 < 75%
-A SpO2 threshold of 92% indicates a need for oxygen therapy.
Question:
What conditions can affect the accuracy of pulse oximetry readings?
Answer:
-Motion artifact
-Dark skin pigmentation
-Nail polish
-Low perfusion
-Ambient light interference.
-Presence of carboxyhemoglobin or methemoglobin.
-Abnormal hemoglobin,
such as fetal hemoglobin or anemia.
Question:
How can problems with pulse oximetry be resolved?
Answer:
-Repositioning the probe, alternating the probe site, or removing ambient light
sources or nail polish.
-For dark-skinned individuals, adjust the oximeter low alarm 3% to 5%
high-er.
-Use pulse co-oximeters for more accurate measurements in certain situations.
Question:
What are the key points for performing pulse oximetry?
Answer:
-Follow manufacturer's protocol, ensure correct sensor size and placement.
-Validate readings against actual SaO2 whenever possible.
-Clean and disinfect sensors between patients and document all
measurements in patient records.
Question:
Can a pulse oximeter provide accurate readings in all situations?
Answer:
No, there are limitations and factors that can affect accuracy, such as:
-Motion artifact
-Dark skin pigmentation
-Abnormal hemoglobin levels.
Question:
What is the primary purpose of peak flow measurements?
Answer:
To assess expiratory flow rates.
Question:
Why is peak flow used?
