Clinical trial NCT03479216: Comparison of Intra-articular Dexmedetomidine and Magnesium in Postoperative Pain
Official title: Comparison of Intra-articular Dexmedetomidine and Magnesium in Postoperative Pain
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE4
Conditions: Postoperative Pain
Intra-articular Injection
Dexmedetomidine
Magnesium Sulfate
Keywords: Analgesia
Anesthesia
Arthroscopy
Bupivacaine
Dexmedetomidine
Injections, Intra-Articular
Magnesium
Pain, Postoperative
Lead sponsor: Derince Training and Research Hospital
Sponsor class: OTHER
First posted: 2018-03-27
Enrollment: 62
Sex: ALL
Minimum age (years): 18
Maximum age (years): 65
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: SUPPORTIVE_CARE

Brief summary: Arthroscopic meniscus surgeries are the most frequent orthopedic procedures. The objective of the study is to compare the effects of intraarticular local anesthetic and adjuvant (dexmedetomidine vs magnesium) combinations in postoperative pain and analgesic requirement. The investigators' hypothesis is adjuvants added to the local anesthetics decreases the total local anesthetic dose, provides more effective pain relief according to local anesthetic only, and decreases the postoperative systemic non-steroidal analgesic and opioid doses.

Detailed description: Arthroscopic meniscus surgeries are the most frequent orthopedic procedures. However, irritation of free nerve endings in the synovial tissue and anterior fat pads and stretching and resection in the joint capsule lead to pain at various levels. Proper pain management enhances recovery, provides early mobilization and shortens length of hospital stay.

"Opioid-free" analgesia methods are frequently emphasized in published postoperative pain management guidelines and multimodal treatment approaches such as local anesthetic infiltration is recommended. In the treatment of knee pain, intra-articular drug injections are the most commonly used method because of minimal systemic side effects.

The drugs most commonly administered intraarticularly included local anesthetics (bupivacaine, levobupivacaine, lidocaine), opioids (morphine, fentanyl), magnesium sulfate, steroids, and α2 agonists (clonidine, dexmedetomidine).

Dexmedetomidine is a selective, specific, lipophilic and potent α2 adrenergic receptor agonist with sedative, anxiolytic, analgesic, antihypertensive and sympatholytic effects. It provides analgesic activity through both the central and peripheral nervous system. The analgesic effects of intra-articular administration of dexmedetomidine in arthroscopic surgeries have been demonstrated. Most side effects of this drug included hypotension and bradycardia. However, these side effects have never been encountered with intra-articular injection of the drug.

Magnesium is also an adjuvant drug which has a key role in nociceptive transmission, and acts as a NMDA (N-Methyl-D-Aspartate) antagonist in spinal neurons.

While opioid free anesthesia and analgesia methods gain importance nowadays, there has been increased interest in non-opioid analgesic drugs and multimodal analgesia applications. In order to increase the effects of local anesthetics and prolong their analgesic times, the addition of various adjuvants to local anesthetics is frequently used.

In the randomized controlled trials, intraarticular local anesthetic drugs combined with adjuvant drugs for postoperative analgesia were found to be superior to local anesthetic drugs alone. It is also known that local anesthetics have negative effects on chondrocytes. One of the goals of the investigators' in this study is to reduce the amount of local anesthetic used by adding adjuvant to local anesthetics.

In this study, the investigators plan to compare the efficacy of 2 adjuvants (magnesium sulfate and dexmedetomidine) combined with local anesthetics to be given intraarticularly for postoperative pain management after elective arthroscopic surgery.

Intraarticular high-volume drug injections may cause pain due to tension in the joint capsule. Additionally, the investigators aim to decrease the total drug volume with adjuvant drugs used in combination with local anesthetic, and thus to prevent joint capsule tension pain.

Eligibility criteria: Inclusion Criteria:

* age \>18, \<65
* scheduled for elective knee arthroscopy under spinal anesthesia
* ASA I and ASA II

Exclusion Criteria:

* age \<18 and \>65
* patients who received general anesthesia
* diabetes
* refusal of the patient
* known allergy to the specified drugs

Primary outcomes:
measure: Postoperative Pain
timeFrame: 24 hours
Secondary outcomes:
measure: Postoperative Opioid/NSAID Consumption
timeFrame: 24 hours
measure: Rescue Analgesic Time
timeFrame: 24 hours
measure: Surgery Time
timeFrame: 24 hours
measure: Time to the End of Spinal Anesthesia
timeFrame: 24 hours
measure: Mobilization
timeFrame: 24 hours
measure: Number of Participants With Complications Due to Intraarticular Injection
timeFrame: 24 hours
Other outcomes:
Locations:
city: Kocaeli
country: Turkey
facility: Derince Training and Research Hospital
state: Derince
Study officials:
affiliation: Derince Training and Research Hospital
name: Tolga K Saracoglu, Ass Prof
role: STUDY_CHAIR
References:
citation: Sun R, Zhao W, Hao Q, Tian H, Tian J, Li L, Jia W, Yang K. Intra-articular clonidine for post-operative analgesia following arthroscopic knee surgery: a systematic review and meta-analysis. Knee Surg Sports Traumatol Arthrosc. 2014 Sep;22(9):2076-84. doi: 10.1007/s00167-013-2615-8. Epub 2013 Jul 24.
citation: Yang Y, Zeng C, Wei J, Li H, Yang T, Deng ZH, Li YS, Yang TB, Lei GH. Single-dose intra-articular bupivacaine plus morphine versus bupivacaine alone after arthroscopic knee surgery: a meta-analysis of randomized controlled trials. Knee Surg Sports Traumatol Arthrosc. 2017 Mar;25(3):966-979. doi: 10.1007/s00167-015-3748-8. Epub 2015 Aug 12.
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citation: Li C, Qu J. Efficacy of dexmedetomidine for pain management in knee arthroscopy: A systematic review and meta-analysis. Medicine (Baltimore). 2017 Oct;96(43):e7938. doi: 10.1097/MD.0000000000007938.
citation: Heydari SM, Hashemi SJ, Pourali S. The Comparison of Preventive Analgesic Effects of Ketamine, Paracetamol and Magnesium Sulfate on Postoperative Pain Control in Patients Undergoing Lower Limb Surgery: A Randomized Clinical Trial. Adv Biomed Res. 2017 Oct 25;6:134. doi: 10.4103/2277-9175.217217. eCollection 2017.
citation: Kizilcik N, Ozler T, Menda F, Ulucay C, Koner O, Altintas F. The effects of intra-articular levobupivacain versus levobupivacain plus magnesium sulfate on postoperative analgesia in patients undergoing arthroscopic meniscectomy: A prospective randomized controlled study. Acta Orthop Traumatol Turc. 2017 Mar;51(2):104-109. doi: 10.1016/j.aott.2017.02.014. Epub 2017 Mar 15.
citation: Aytuluk HG, Gultekin A, Saracoglu KT. Comparison of intraarticular bupivacaine-dexmedetomidine and bupivacaine-magnesium sulfate for postoperative analgesia in arthroscopic meniscectomy: a randomized controlled clinical trial. Hippokratia. 2019 Apr-Jun;23(2):51-57.