- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02789410
Spinal Morphine vs. Hydromorphone for Pain Control After Cesarean Delivery
Intrathecal Morphine Versus Intrathecal Hydromorphone for Analgesia Following Cesarean Delivery
Study Overview
Status
Intervention / Treatment
Detailed Description
Spinal anesthesia is the most common anesthetic technique used for Cesarean delivery in the United States and across the world. Intrathecal opioids are administered with a local anesthetic during spinal anesthesia post-Cesarean delivery analgesia. The effectiveness of intrathecal morphine for post-Cesarean pain control is well established, and the use of intrathecal hydromorphone in this patient population is growing. No prospective studies have been conducted to specifically compare the efficacy of intrathecal morphine versus hydromorphone for post-Cesarean analgesia.
After intrathecal administration, opioid drug disposition depends on the lipid solubility of the individual drug. Because of its hydrophilic nature, cerebrospinal fluid (CSF) concentrations of morphine decline more slowly than similar doses of lipophilic drugs. This accounts for more rostral spread, greater dermatomal analgesia, and longer duration of action when compared to highly lipophilic opioids like fentanyl and sufentanil. When used for post-cesarean analgesia, intrathecal morphine has a duration of action between 14-36 hours with wide variation between individual patients. While hydromorphone is similar chemically to morphine, it is more lipid soluble. This decreases its spread within the intrathecal space and enhances its penetration into the dorsal horn of the spinal cord where interactions with opioid receptors occur. These differences between the two medications may influence their duration of action. Theoretically, this would reduce the duration of action of intrathecal hydromorphone when compared with intrathecal morphine. Retrospective studies have shown that the analgesic benefit for intrathecal hydromorphone appears to extend at least 12 hours after cesarean delivery and may extend up to 24 hours.
Although effective in reducing pain, intrathecal opioids are associated with side effects including pruritus, nausea, and respiratory depression. A meta-analysis reviewing twenty-eight studies which investigated intrathecal morphine versus placebo demonstrated moderate increases in the incidences of pruritus, nausea and vomiting. In fact the incidence of nausea with IT morphine has been reported to be nearly 33%. The differences in pharmacokinetics between morphine and hydromorphone may also create differences in side effect profiles. Some studies have found that hydromorphone causes less nausea and pruritus than morphine, while others have not. Although opioid-induced respiratory depression is a rare event, studies evaluating intrathecal hydromorphone for post-Cesarean delivery pain have not reported any cases of respiratory depression.
In this study, the investigators aim to compare the duration of analgesia of intrathecal morphine vs. hydromorphone for analgesia after cesarean delivery. Secondarily, the investigators will compare the side effects of each drug, including nausea and pruritus. To achieve the goals of this study, it is important to study equipotent doses of these medications. Previous work by the investigators of this study found that the effective dose for postoperative analgesia in 90% of patients (ED90) is 75 micrograms for intrathecal hydromorphone and 150 micrograms for intrathecal morphine. However, it is not known if these two equipotent medication doses provide a similar duration of analgesia.
The investigators hypothesize that 150 mcg of intrathecal morphine will result in a longer duration of analgesia when compared to 75 micrograms of intrathecal hydromorphone. Additionally, the investigators hypothesize that there will be more pruritus in the intrathecal hydromorphone group early after surgery, and no difference in side effects at 24 hours after surgery.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Minnesota
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Rochester, Minnesota, United States, 55905
- Mayo Clinic in Rochester
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- American Society of Anesthesiologists (ASA) physical status II-III women presenting for elective cesarean delivery
- Term gestation (37-42 weeks)
- Desire to have a spinal anesthesia technique for cesarean delivery
Exclusion Criteria:
- Any contraindication to the administration of a spinal technique for anesthesia
- History of intolerance or adverse reaction to opioid medications
- Chronic pain syndrome or current opioid use >30 oral morphine equivalents/day
- Allergy or intolerance to acetaminophen, ketorolac, ibuprofen, or oxycodone
- Current BMI > 50
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Intrathecal hydromorphone
Patients will be randomized to receive a one time dose of 75 mcg intrathecal hydromorphone as part of their spinal anesthesia.
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Hydromorphone is administered as part of spinal anesthesia for post-operative pain relief.
Other Names:
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Active Comparator: Intrathecal morphine
Patients will be randomized to receive a one time dose of 150 mcg intrathecal morphine as part of their spinal anesthesia.
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Morphine is administered as part of spinal anesthesia for post-operative pain relief.
Other Names:
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
NRS Score for Pain (0-10) With Movement 24 Hours After Spinal Administration
Time Frame: 24 hours after administration of spinal anesthesia
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Each patient will be interviewed by a member of the study team 24 hours after receiving their spinal anesthetic.
Patients will be asked to rate their current level of pain on a Numeric Rating Scale (NRS) of 0 (no pain) to 10 (worst pain imaginable).
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24 hours after administration of spinal anesthesia
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Nausea
Time Frame: 24 hours after administration of spinal anesthesia
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The number of subjects who experienced and self-reported nausea within the first 24 hours after administration of spinal anesthesia.
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24 hours after administration of spinal anesthesia
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Pruritus
Time Frame: 24 hours after administration of spinal anesthesia
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The number of subjects who experienced and self-reported pruritus within the first 24 hours after administration of spinal anesthesia.
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24 hours after administration of spinal anesthesia
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Hans P Sviggum, Mayo Clinic
Publications and helpful links
General Publications
- Gehling M, Tryba M. Risks and side-effects of intrathecal morphine combined with spinal anaesthesia: a meta-analysis. Anaesthesia. 2009 Jun;64(6):643-51. doi: 10.1111/j.1365-2044.2008.05817.x.
- Bucklin BA, Hawkins JL, Anderson JR, Ullrich FA. Obstetric anesthesia workforce survey: twenty-year update. Anesthesiology. 2005 Sep;103(3):645-53. doi: 10.1097/00000542-200509000-00030. No abstract available.
- Sviggum HP, Arendt KW, Jacob AK, Niesen AD, Johnson RL, Schroeder DR, Tien M, Mantilla CB. Intrathecal Hydromorphone and Morphine for Postcesarean Delivery Analgesia: Determination of the ED90 Using a Sequential Allocation Biased-Coin Method. Anesth Analg. 2016 Sep;123(3):690-7. doi: 10.1213/ANE.0000000000001229.
- Palmer CM, Emerson S, Volgoropolous D, Alves D. Dose-response relationship of intrathecal morphine for postcesarean analgesia. Anesthesiology. 1999 Feb;90(2):437-44. doi: 10.1097/00000542-199902000-00018. Erratum In: Anesthesiology 1999 Apr;90(4):1241.
- Terajima K, Onodera H, Kobayashi M, Yamanaka H, Ohno T, Konuma S, Ogawa R. Efficacy of intrathecal morphine for analgesia following elective cesarean section: comparison with previous delivery. J Nippon Med Sch. 2003 Aug;70(4):327-33. doi: 10.1272/jnms.70.327.
- Beatty NC, Arendt KW, Niesen AD, Wittwer ED, Jacob AK. Analgesia after Cesarean delivery: a retrospective comparison of intrathecal hydromorphone and morphine. J Clin Anesth. 2013 Aug;25(5):379-383. doi: 10.1016/j.jclinane.2013.01.014. Epub 2013 Aug 17.
- Rauch E. Intrathecal hydromorphone for postoperative analgesia after cesarean delivery: a retrospective study. AANA J. 2012 Aug;80(4 Suppl):S25-32.
- Rauch E. Intrathecal hydromorphone for cesarean delivery: in search of improved postoperative pain management: a case report. AANA J. 2011 Oct;79(5):427-32.
- Nortcliffe SA, Shah J, Buggy DJ. Prevention of postoperative nausea and vomiting after spinal morphine for Caesarean section: comparison of cyclizine, dexamethasone and placebo. Br J Anaesth. 2003 May;90(5):665-70. doi: 10.1093/bja/aeg120.
Helpful Links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 15-009421
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
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