Monitoring Parameters for Patients on Fentanyl Infusion

Essential Monitoring Parameters

The American Society of Anesthesiologists recommends monitoring adequacy of ventilation through respiratory rate, depth of respiration, and pattern of breathing in patients on fentanyl infusion 1, 2
Continuous pulse oximetry is recommended to detect hypoxemia early in patients on fentanyl infusion 3, 4
End-tidal CO2 monitoring (capnography) is more likely to detect respiratory depression earlier than clinical signs or pulse oximetry alone in patients on fentanyl infusion 3
The American Society of Anesthesiologists recommends monitoring for signs of upper airway obstruction in patients on fentanyl infusion 4
Regular assessment of alertness and sedation level using a standardized scoring system is recommended for patients on fentanyl infusion 2, 4
In cases with concerning signs, it is acceptable to awaken a sleeping patient to assess level of consciousness, as recommended by the American Society of Anesthesiologists 1, 3
Monitoring for signs of excessive sedation, which may precede respiratory depression, is recommended for patients on fentanyl infusion 2
Consider direct arterial pressure monitoring in high-risk patients on fentanyl infusion, as recommended by the Anaesthesia society 5
The American Society of Anesthesiologists recommends monitoring for urinary retention in patients on fentanyl infusion 4

Continuous monitoring should be performed during the entire time the fentanyl infusion is in use, as recommended by the American Society of Anesthesiologists 3
At minimum, monitoring at least once every hour should be performed for the first 12 hours after initiation of fentanyl infusion, as recommended by the American Society of Anesthesiologists 3
Followed by monitoring at least once every 2 hours for the next 12 hours, as recommended by the American Society of Anesthesiologists 3
After 24 hours, monitoring should be performed at least once every 4 hours, as recommended by the American Society of Anesthesiologists 3
Increased monitoring (intensity, duration, or additional methods) is warranted for patients at increased risk of respiratory depression, including those with unstable medical condition 5, obesity 2, sleep apnea 2, concomitant administration of other opioids, sedatives, or hypnotics 4, extremes of age 1

Supplemental oxygen should be administered to patients with altered level of consciousness, respiratory depression, or hypoxemia, as recommended by the American Society of Anesthesiologists 1
Reversal agents (naloxone) should be available for administration to all patients experiencing significant respiratory depression, as recommended by the American Society of Anesthesiologists 4
Maintain intravenous access if recurring respiratory depression occurs, as recommended by the American Society of Anesthesiologists 4
In severe respiratory depression, initiate appropriate resuscitation measures, as recommended by the American Society of Anesthesiologists 4
Consider noninvasive positive-pressure ventilation if frequent or severe airway obstruction or hypoxemia occurs, as recommended by the American Society of Anesthesiologists 4