Abstract

Epidural administration of morphine is a common clinical practice to provide satisfactory analgesia for acute postoperative pain. Scientific evidence results from numerous studies conducted in a clincial pain setting. However, these conditions do not allow investigators to address many questions concerning the pharmacodynamics of epidural morphine. The goal for the current study is to employ a recently developed experimental pain model to study the spread and the time course of analgesia mediated by epidural morphine. To our knowledge this is the first randomized, placebo controlled, double-blind, cross- over study investigating the pharmacodynamics of epidural morphine for a 24 hour period post injection. Thirteen out of 14 healthy subjects have entered the study so far. Analysis of the available data suggests that the onset of analgesia after epidural morphine is very slow, peak effect occurs not before five hours and the drug acts for at least 24 hours. Additionally there is reasonable evidence to suggest that epidural morphine acts mainly by diffusion to the spinal cord as opposed to a systemic re-uptake. Suggested experimental pain model is a suitable pharmacodynamic tool to depict analgesia mediated by epidural morphine.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
General Clinical Research Centers Program (M01)
Project #
5M01RR000070-37
Application #
6115050
Study Section
Project Start
1998-12-01
Project End
1999-11-30
Budget Start
1998-10-01
Budget End
1999-09-30
Support Year
37
Fiscal Year
1999
Total Cost
Indirect Cost

  Institution

Name
Stanford University
Department
Type
DUNS #
800771545
City
Stanford
State
CA
Country
United States
Zip Code
94305

  Publications

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Evangelou, Evangelos (see original citation for additional authors) (2018) Genetic analysis of over 1 million people identifies 535 new loci associated with blood pressure traits. Nat Genet 50:1412-1425
Doherty, Aiden; Smith-Byrne, Karl; Ferreira, Teresa et al. (2018) GWAS identifies 14 loci for device-measured physical activity and sleep duration. Nat Commun 9:5257
Askie, Lisa M; Darlow, Brian A; Finer, Neil et al. (2018) Association Between Oxygen Saturation Targeting and Death or Disability in Extremely Preterm Infants in the Neonatal Oxygenation Prospective Meta-analysis Collaboration. JAMA 319:2190-2201
Frayling, Timothy M; Beaumont, Robin N; Jones, Samuel E et al. (2018) A Common Allele in FGF21 Associated with Sugar Intake Is Associated with Body Shape, Lower Total Body-Fat Percentage, and Higher Blood Pressure. Cell Rep 23:327-336
Srinivasan, Lakshmi; Page, Grier; Kirpalani, Haresh et al. (2017) Genome-wide association study of sepsis in extremely premature infants. Arch Dis Child Fetal Neonatal Ed 102:F439-F445
Di Fiore, Juliann M; Martin, Richard J; Li, Hong et al. (2017) Patterns of Oxygenation, Mortality, and Growth Status in the Surfactant Positive Pressure and Oxygen Trial Cohort. J Pediatr 186:49-56.e1
Denson, Lee A; McDonald, Scott A; Das, Abhik et al. (2017) Early Elevation in Interleukin-6 is Associated with Reduced Growth in Extremely Low Birth Weight Infants. Am J Perinatol 34:240-247
Holmes, Michael V; Pulit, Sara L; Lindgren, Cecilia M (2017) Genetic and epigenetic studies of adiposity and cardiometabolic disease. Genome Med 9:82
Younge, Noelle; Goldstein, Ricki F; Bann, Carla M et al. (2017) Survival and Neurodevelopmental Outcomes among Periviable Infants. N Engl J Med 376:617-628

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