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Optimizing Outpatient Anesthesia (OSPREy-Outpatient Surgery Pain Relief Enhancement)

Optimizing Outpatient Anesthesia (OSPREy-Outpatient Surgery Pain Relief Enhancement)

Status
Completed
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03726268
Acronym
OSPREy
Enrollment
907
Registered
2018-10-31
Start date
2018-11-29
Completion date
2024-01-30
Last updated
2025-11-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Opioid Use, Pain, Postoperative

Brief summary

The overall goal of this research is to improve perioperative pain treatment, decrease post-operative opioid consumption, diminish opioid related side effects, and reduce postop opioid prescribing (and hence opportunity for diversion, abuse, addiction, and fatal overdose).

Detailed description

This protocol will test the innovative, paradigm-shifting hypothesis that anesthesia for outpatient surgery with long-duration opioids (methadone), compared with conventional short-duration opioids, achieves better analgesia, with similar or diminished side effects, may reduce development of chronic postsurgical pain, improves recovery, and importantly, decreases postoperative opioid consumption and could hence diminish take-home opioid prescribing and shrink the population reservoir of unused opioids available for diversion and misuse. Two cohorts will be studied, but analyzed separately. 1) Short-stay, anticipated next-day discharge surgery (compare short-duration vs long-duration opioid), 2) Same-day discharge surgery (compare short-duration vs long-duration opioid).

Interventions

DRUGMethadone

Dose is 0.15-0.3 mg/kg IV methadone HCl given intraoperatively and in the immediate post-operative period. Intraoperative methadone doses are 15 mg in short-stay, anticipated next-day discharge patients (10 mg if ≤55kg), and 10 mg in same-day surgery patients.

DRUGFentanyl

Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)).

DRUGHydromorphone

Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)).

DRUGMorphine

Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)).

DRUGSufentanil

Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)).

Sponsors

National Institute on Drug Abuse (NIDA)
CollaboratorNIH
Duke University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* Age 18-65 years Undergoing general anesthesia and moderately painful ambulatory surgery with anticipated postop stay of \< 24 hours * Signed, written, informed consent

Exclusion criteria

* History of liver or kidney disease. * Females who are pregnant or nursing. * Chronic opioid use (e.g. preoperative daily use of methadone, fentanyl transdermal patches, or ≥ 3 oxycodone pills)

Design outcomes

Primary

MeasureTime frameDescription
Total 30 Day Post-discharge Home Opioid Use (Number of Tablets)Approximately 30 daysBased on home diary and hospital record. Number of opioid tablets from PACU discharge to postoperative day (POD) 30 for Same Day subjects, and number of opioid tablets from POD 1 to POD 30 for Short-Stay subjects.

Secondary

MeasureTime frameDescription
Total Intraoperative Non-methadone Opioid AdministrationApproximately 12 hoursBased on hospital record.
Total Post Anesthesia Care Unit (PACU) Opioid AdministrationApproximately 2 hoursBased on hospital record.
Total Hospital Non-methadone Opioid AdministrationStart of surgery to hospital discharge, up to 2 daysBased on hospital record.
Total 7-day Post-PACU Discharge Home Opioid UseUp to 7 days post-PACU dischargeBased on home diary and hospital record. Number of opioid tablets from PACU discharge to postoperative day (POD) 7 for Same Day subjects, and number of opioid tablets from POD 1 to POD 7 for Short-Stay subjects.

Countries

United States

Participant flow

Participants by arm

ArmCount
Short-stay, IV Methadone
Anticipated next-day discharge; intraoperative and post-operative IV methadone Methadone: Dose is 0.15-0.3 mg/kg IV methadone HCl given intraoperatively and in the immediate post-operative period. Intraoperative methadone doses are 15 mg in short-stay, anticipated next-day discharge patients (10 mg if ≤55kg), and 10 mg in same-day surgery patients.
175
Short-stay, IV Short-acting Opioids
Anticipated next-day discharge; intraoperative and post-operative IV fentanyl, sufentanil, morphine, or hydromorphone at anesthesia provider discretion Fentanyl: Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)). Hydromorphone: Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)). Morphine: Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)). Sufentanil: Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)).
175
Same-day, IV Methadone
Intraoperative and post-operative IV methadone Methadone: Dose is 0.15-0.3 mg/kg IV methadone HCl given intraoperatively and in the immediate post-operative period. Intraoperative methadone doses are 15 mg in short-stay, anticipated next-day discharge patients (10 mg if ≤55kg), and 10 mg in same-day surgery patients.
190
Same-day, IV Short-acting Opioids
Intraoperative and post-operative IV fentanyl, sufentanil, morphine or hydromorphone at anesthesia provider discretion Fentanyl: Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)). Hydromorphone: Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)). Morphine: Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)). Sufentanil: Given per clinical provider discretion intraoperatively and in the immediate post-operative period (while patient remains in the post anesthesia care unit (PACU)).
194
Total734

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003
Overall StudyPhysician Decision2863
Overall StudyWithdrawal by Subject11598

Baseline characteristics

CharacteristicShort-stay, IV MethadoneTotalSame-day, IV Short-acting OpioidsSame-day, IV MethadoneShort-stay, IV Short-acting Opioids
Age, Continuous41.8 years
STANDARD_DEVIATION 13.4
43.0 years
STANDARD_DEVIATION 12.8
43.6 years
STANDARD_DEVIATION 12
44.6 years
STANDARD_DEVIATION 12.3
41.6 years
STANDARD_DEVIATION 13.4
Ethnicity (NIH/OMB)
Hispanic or Latino
6 Participants25 Participants8 Participants7 Participants4 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
161 Participants669 Participants173 Participants171 Participants164 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
8 Participants40 Participants13 Participants12 Participants7 Participants
Race/Ethnicity, Customized
Race
American Indian or Alaska Native
0 Participants8 Participants2 Participants3 Participants3 Participants
Race/Ethnicity, Customized
Race
Asian
2 Participants12 Participants5 Participants1 Participants4 Participants
Race/Ethnicity, Customized
Race
Black or African American
39 Participants122 Participants18 Participants35 Participants30 Participants
Race/Ethnicity, Customized
Race
More than one race
2 Participants7 Participants1 Participants4 Participants0 Participants
Race/Ethnicity, Customized
Race
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants
Race/Ethnicity, Customized
Race
Other
2 Participants9 Participants1 Participants4 Participants2 Participants
Race/Ethnicity, Customized
Race
Unknown or Not Reported
6 Participants17 Participants3 Participants3 Participants5 Participants
Race/Ethnicity, Customized
Race
White
124 Participants559 Participants164 Participants140 Participants131 Participants
Region of Enrollment
United States
175 Participants734 Participants194 Participants190 Participants175 Participants
Sex: Female, Male
Female
84 Participants477 Participants142 Participants154 Participants97 Participants
Sex: Female, Male
Male
91 Participants257 Participants52 Participants36 Participants78 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
0 / 1881 / 1880 / 2050 / 205
other
Total, other adverse events
21 / 18817 / 18829 / 20516 / 205
serious
Total, serious adverse events
6 / 1886 / 18810 / 20511 / 205

Outcome results

Primary

Total 30 Day Post-discharge Home Opioid Use (Number of Tablets)

Based on home diary and hospital record. Number of opioid tablets from PACU discharge to postoperative day (POD) 30 for Same Day subjects, and number of opioid tablets from POD 1 to POD 30 for Short-Stay subjects.

Time frame: Approximately 30 days

ArmMeasureValue (MEAN)Dispersion
Short-stay, IV MethadoneTotal 30 Day Post-discharge Home Opioid Use (Number of Tablets)10.00 tabletsStandard Deviation 15.5
Short-stay, IV Short-acting OpioidsTotal 30 Day Post-discharge Home Opioid Use (Number of Tablets)10.00 tabletsStandard Deviation 11.6
Same-day, IV MethadoneTotal 30 Day Post-discharge Home Opioid Use (Number of Tablets)6.18 tabletsStandard Deviation 8.4
Same-day, IV Short-acting OpioidsTotal 30 Day Post-discharge Home Opioid Use (Number of Tablets)6.67 tabletsStandard Deviation 10.4
p-value: 0.97Negative binomial regression
p-value: 0.631Negative binomial regression
Secondary

Total 7-day Post-PACU Discharge Home Opioid Use

Based on home diary and hospital record. Number of opioid tablets from PACU discharge to postoperative day (POD) 7 for Same Day subjects, and number of opioid tablets from POD 1 to POD 7 for Short-Stay subjects.

Time frame: Up to 7 days post-PACU discharge

Population: Participants with data collected.

ArmMeasureValue (MEAN)Dispersion
Short-stay, IV MethadoneTotal 7-day Post-PACU Discharge Home Opioid Use6.50 tabletsStandard Deviation 8.1
Short-stay, IV Short-acting OpioidsTotal 7-day Post-PACU Discharge Home Opioid Use8.20 tabletsStandard Deviation 8.7
Same-day, IV MethadoneTotal 7-day Post-PACU Discharge Home Opioid Use4.96 tabletsStandard Deviation 5.8
Same-day, IV Short-acting OpioidsTotal 7-day Post-PACU Discharge Home Opioid Use5.45 tabletsStandard Deviation 7.2
p-value: 0.105Negative binomial regression
p-value: 0.531Negative binomial regression
Secondary

Total Hospital Non-methadone Opioid Administration

Based on hospital record.

Time frame: Start of surgery to hospital discharge, up to 2 days

ArmMeasureValue (MEDIAN)
Short-stay, IV MethadoneTotal Hospital Non-methadone Opioid Administration30 Milligram Morphine Equivalent (MME)
Short-stay, IV Short-acting OpioidsTotal Hospital Non-methadone Opioid Administration128 Milligram Morphine Equivalent (MME)
Same-day, IV MethadoneTotal Hospital Non-methadone Opioid Administration0 Milligram Morphine Equivalent (MME)
Same-day, IV Short-acting OpioidsTotal Hospital Non-methadone Opioid Administration68 Milligram Morphine Equivalent (MME)
p-value: <0.001Wilcoxon (Mann-Whitney)
p-value: <0.001Wilcoxon (Mann-Whitney)
Secondary

Total Intraoperative Non-methadone Opioid Administration

Based on hospital record.

Time frame: Approximately 12 hours

ArmMeasureValue (MEDIAN)
Short-stay, IV MethadoneTotal Intraoperative Non-methadone Opioid Administration0.0 Milligram Morphine Equivalent (MME)
Short-stay, IV Short-acting OpioidsTotal Intraoperative Non-methadone Opioid Administration18.0 Milligram Morphine Equivalent (MME)
Same-day, IV MethadoneTotal Intraoperative Non-methadone Opioid Administration0.0 Milligram Morphine Equivalent (MME)
Same-day, IV Short-acting OpioidsTotal Intraoperative Non-methadone Opioid Administration16.7 Milligram Morphine Equivalent (MME)
p-value: <0.001Wilcoxon (Mann-Whitney)
p-value: <0.001Wilcoxon (Mann-Whitney)
Secondary

Total Post Anesthesia Care Unit (PACU) Opioid Administration

Based on hospital record.

Time frame: Approximately 2 hours

ArmMeasureValue (MEDIAN)
Short-stay, IV MethadoneTotal Post Anesthesia Care Unit (PACU) Opioid Administration2.0 Milligram Morphine Equivalent (MME)
Short-stay, IV Short-acting OpioidsTotal Post Anesthesia Care Unit (PACU) Opioid Administration3.0 Milligram Morphine Equivalent (MME)
Same-day, IV MethadoneTotal Post Anesthesia Care Unit (PACU) Opioid Administration2.0 Milligram Morphine Equivalent (MME)
Same-day, IV Short-acting OpioidsTotal Post Anesthesia Care Unit (PACU) Opioid Administration2.5 Milligram Morphine Equivalent (MME)
p-value: <0.001Wilcoxon (Mann-Whitney)
p-value: 0.004Wilcoxon (Mann-Whitney)

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026