Clinical trial NCT03610893: Dexamethasone Versus Dexmedetomidine as Adjuvants for Nerve Blocks
Official title: A Randomized Comparison Between Perineural Dexamethasone and Perineural Dexmedetomidine as Adjuvants for Ultrasound-Guided Infraclavicular Blocks
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Pain, Postoperative
Pain, Acute
Upper Extremity Injury
Keywords: nerve block adjuvants
dexamethasone
dexmedetomidine
nerve block duration
Lead sponsor: University of Chile
Sponsor class: OTHER
First posted: 2018-08-01
Enrollment: 120
Sex: ALL
Minimum age (years): 18
Maximum age (years): 75
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: When used as perineural (PN) adjuvants to local anesthetics (LAs), dexamethasone (DX) and dexmedetomidine (DXD) have been well documented to prolong the duration of peripheral nerve blocks. These drugs have important differences in terms of cost and safety profiles. This randomized controlled trial (RCT) will compare PN DX and PN DXD for ultrasound-guided infraclavicular brachial plexus blocks (ICBs).

Since analgesic and sensory duration can be influenced by factors different to block, motor block duration is the main outcome. The protocol is designed as an equivalency trial and hypothesize that both drugs result in similar durations. The equivalency margin is set at 3 hrs.


Eligibility criteria: Inclusion Criteria:

* age between 18 and 75 years
* American Society of Anesthesiologists classification 1-3
* body mass index between 20 and 35

Exclusion Criteria:

* adults who are unable to give their own consent
* pre-existing neuropathy (assessed by history and physical examination)
* coagulopathy (assessed by history and physical examination and, if deemed clinically necessary, by blood work up i.e. platelets ≤ 100, International Normalized Ratio ≥ 1.4 or prothrombin time ≥ 50)
* renal failure (assessed by history and physical examination and, if deemed clinically necessary, by blood work up i.e. creatinine ≥ 100)
* hepatic failure (assessed by history and physical examination and, if deemed clinically necessary, by blood work up i.e. transaminases ≥ 100)
* allergy to local anesthetics (LAs)
* pregnancy
* prior surgery in the infraclavicular region
* chronic pain syndromes requiring opioid intake at home

Primary outcomes:
measure: Motor block duration
timeFrame: 24 hours after block
Secondary outcomes:
measure: Sensory block duration
timeFrame: 24 hours after block
measure: Analgesic block duration
timeFrame: 24 hours after block
measure: Block performance time
timeFrame: 1 hour before surgery
measure: Intensity of pain during block procedure
timeFrame: 1 hour before surgery
measure: Block onset time
timeFrame: 1 hour before surgery
measure: Sensory and motor block score
timeFrame: 30 minutes post injection
measure: Incidence of complete block
timeFrame: 30 minutes post injection
measure: Perioperative glycemic levels
timeFrame: Perioperative period
measure: Perioperative median artery pressure (MAP)
timeFrame: 2 hours after surgery
measure: Perioperative heart rate (HR)
timeFrame: 2 hours after surgery
measure: Postoperative persistent sedation
timeFrame: 2 hours after surgery
measure: Respiratory depression
timeFrame: 2 hours after surgery
measure: Incidence of block side effects
timeFrame: 2 hours after surgery
measure: Persistent neurologic deficit
timeFrame: 7 days post surgery
Other outcomes:
Locations:
city: Santiago
country: Chile
facility: Hospital Clínico Universidad de Chile
state: Metropolitana
Study officials:
References:
citation: Abdallah FW, Johnson J, Chan V, Murgatroyd H, Ghafari M, Ami N, Jin R, Brull R. Intravenous dexamethasone and perineural dexamethasone similarly prolong the duration of analgesia after supraclavicular brachial plexus block: a randomized, triple-arm, double-blind, placebo-controlled trial. Reg Anesth Pain Med. 2015 Mar-Apr;40(2):125-32. doi: 10.1097/AAP.0000000000000210.
citation: Desmet M, Braems H, Reynvoet M, Plasschaert S, Van Cauwelaert J, Pottel H, Carlier S, Missant C, Van de Velde M. I.V. and perineural dexamethasone are equivalent in increasing the analgesic duration of a single-shot interscalene block with ropivacaine for shoulder surgery: a prospective, randomized, placebo-controlled study. Br J Anaesth. 2013 Sep;111(3):445-52. doi: 10.1093/bja/aet109. Epub 2013 Apr 15.
citation: Choi S, Rodseth R, McCartney CJ. Effects of dexamethasone as a local anaesthetic adjuvant for brachial plexus block: a systematic review and meta-analysis of randomized trials. Br J Anaesth. 2014 Mar;112(3):427-39. doi: 10.1093/bja/aet417. Epub 2014 Jan 10.
citation: Abdallah FW, Brull R. Facilitatory effects of perineural dexmedetomidine on neuraxial and peripheral nerve block: a systematic review and meta-analysis. Br J Anaesth. 2013 Jun;110(6):915-25. doi: 10.1093/bja/aet066. Epub 2013 Apr 15.
citation: Abdallah FW, Dwyer T, Chan VW, Niazi AU, Ogilvie-Harris DJ, Oldfield S, Patel R, Oh J, Brull R. IV and Perineural Dexmedetomidine Similarly Prolong the Duration of Analgesia after Interscalene Brachial Plexus Block: A Randomized, Three-arm, Triple-masked, Placebo-controlled Trial. Anesthesiology. 2016 Mar;124(3):683-95. doi: 10.1097/ALN.0000000000000983.
citation: Leurcharusmee P, Aliste J, Van Zundert TC, Engsusophon P, Arnuntasupakul V, Tiyaprasertkul W, Tangjitbampenbun A, Ah-Kye S, Finlayson RJ, Tran DQ. A Multicenter Randomized Comparison Between Intravenous and Perineural Dexamethasone for Ultrasound-Guided Infraclavicular Block. Reg Anesth Pain Med. 2016 May-Jun;41(3):328-33. doi: 10.1097/AAP.0000000000000386.
citation: Aliste J, Leurcharusmee P, Engsusophon P, Gordon A, Michelagnoli G, Sriparkdee C, Tiyaprasertkul W, Tran DQ, Van Zundert TC, Finlayson RJ, Tran DQH. A randomized comparison between intravenous and perineural dexamethasone for ultrasound-guided axillary block. Can J Anaesth. 2017 Jan;64(1):29-36. doi: 10.1007/s12630-016-0741-8. Epub 2016 Sep 23.
citation: Chong MA, Berbenetz NM, Lin C, Singh S. Perineural Versus Intravenous Dexamethasone as an Adjuvant for Peripheral Nerve Blocks: A Systematic Review and Meta-Analysis. Reg Anesth Pain Med. 2017 May/Jun;42(3):319-326. doi: 10.1097/AAP.0000000000000571.
citation: Hussain N, Grzywacz VP, Ferreri CA, Atrey A, Banfield L, Shaparin N, Vydyanathan A. Investigating the Efficacy of Dexmedetomidine as an Adjuvant to Local Anesthesia in Brachial Plexus Block: A Systematic Review and Meta-Analysis of 18 Randomized Controlled Trials. Reg Anesth Pain Med. 2017 Mar/Apr;42(2):184-196. doi: 10.1097/AAP.0000000000000564.
citation: Aliste J, Layera S, Bravo D, Fernandez D, Jara A, Garcia A, Finlayson RJ, Tran DQ. Randomized comparison between perineural dexamethasone and dexmedetomidine for ultrasound-guided infraclavicular block. Reg Anesth Pain Med. 2019 Jul 11:rapm-2019-100680. doi: 10.1136/rapm-2019-100680. Online ahead of print.