NCT00560092

Intrathecal Magnesium and Postoperative Analgesia

Effects of a Single Dose of Intrathecal Magnesium Sulfate on Postoperative Morphine Consumption After Total Hip Replacement

• Status: Completed
• Phase: Phase 3
• Study type: Interventional
• Enrollment: 40 (actual)
• Sponsor: University Hospital, Clermont-Ferrand · Academic / Other
• Sex: All
• Age: 56 Years – 93 Years
• Healthy volunteers: Not accepted

Summary

Magnesium is implicated in the activation of NMDA receptors by amino-excitatory acids in the central nervous system \[1\]. Magnesium deficiency is associated to an increased activation of these receptors, and to an increased sensitivity to pain in animals. Spinal cord is the site of sensitization of pain, mainly mediated by the NMDA receptors, and intrathecal magnesium may have anti-hyperalgesic effect when administered intrathecally \[2\]. As intrathecal magnesium has already been used in humans for treatment of eclampsia, we stated that it could also improve postoperative analgesia and reduce the need for auto-administered morphine if given (50 mg of magnesium sulfate) with the intrathecal anesthetic drugs (bupivacaine and sufentanil) injected for orthopedic surgery.

Detailed description

Magnesium is implicated in the activation of NMDA receptors by amino-excitatory acids in the central nervous system \[1\]. Magnesium deficiency is associated to an increased activation of these receptors, and to an increased sensitivity to pain in animals. Spinal cord is the site of sensitization of pain, mainly mediated by the NMDA receptors, and intrathecal magnesium may have anti-hyperalgesic effect when administered intrathecally \[2\]. As intrathecal magnesium has already been used in humans for treatment of eclampsia, we stated that it could also improve postoperative analgesia and reduce the need for auto-administered morphine if given (50 mg of magnesium sulfate) with the intrathecal anesthetic drugs (bupivacaine and sufentanil) injected for orthopedic surgery.

Conditions

• Total Hip Replacement

Interventions

Type	Name	Description
DRUG	intrathecal magnesium sulfate	intrathecal magnesium sulfate

Timeline

• Start date: 2004-01-01
• Primary completion: 2008-10-01
• Completion: 2008-10-01
• First posted: 2007-11-19
• Last updated: 2013-04-04

Locations

1 site across 1 country: France