Dexmedetomidine vs Propofol on the Recordings of Deep Brain Activity Measured Through Implanted Stimulators
NCT ID: NCT02256319
Last Updated: 2015-12-18
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.
COMPLETED
PHASE4
12 participants
INTERVENTIONAL
2014-09-30
2015-12-31
Brief Summary
Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.
The investigators hypothesize that dexmedetomidine produces fewer changes as compared to propofol, and that those changes are consistent and recognizable when compared to activity in patients not exposed to any sedation. Typification of those changes would in the future allow for patients to undergo this surgery comfortably while not compromising the quality of the recording and of the final clinical outcome. The principal variable analyzed is the signal's power in each of the frequency bands, absolute and relative. The analysis will include usual clinical methods such as rapid Fourier transform (FFT) and window fast Fourier transform (WFFT), wavelet analysis, Gabor, and coherence.
Detailed Description
Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.
It is a phase IV clinical trial evaluating the effects of a drug outside the approved.
The study takes part in three phases:
1. DBS placement under sedation with dexmedetomidine at 0.2 μg/kg/h. This will be called "dexmedetomidine record".
2. Four days later and with no sedation, a recording will be registered in one of the specialized electrically isolated rooms at the Neurophysiology Department. This will be dubbed "basal recording". The equipment used is also the standard one used for routine postoperative recordings.
3. 5 days after the initial surgery, and following the protocol in place for these procedures, the tunnelization and battery placement will take place. This is done under general anaesthesia. During anaesthetic induction, the patient is exposed to incremental doses of propofol. Different plasmatic concentrations will be targeted using the mathematical model in the target controlled infusion (TCI) pump. These recordings will be called "propofol at a 0.5, 1, 1.5, 2, 2.5 μg/mL".
Conditions
See the medical conditions and disease areas that this research is targeting or investigating.
Keywords
Explore important study keywords that can help with search, categorization, and topic discovery.
Study Design
Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.
NON_RANDOMIZED
CROSSOVER
SUPPORTIVE_CARE
NONE
Study Groups
Review each arm or cohort in the study, along with the interventions and objectives associated with them.
Dexmedetomidine recording
Recording registered through the deep brain stimulation electrodes with dexmedetomidine at 0.2 μg/kg/h.
Dexmedetomidine
Patients will receive a loading dose of 1 µg/kg in 10 min before starting the surgery. The maintenance dose will be 0.2-1 µg/kg/h for a Ramsey Sedation Score of 3-4 during the surgery´s preparation. It will be reduced to 0.2 µg/kg/h 15 min before starting the microelectrode recording for a Ramsey Sedation Score of 2. After the placement of the deep brain stimulator we will record the local field potentials activity. In addition, the subscales of rigidity, tremor and bradykinesia of the Unified Parkinson's Disease Rating Scale (UPDRS-III) score will be evaluated. Once the deep brain stimulator recording and neurologic exploration will be over patients will receive a maintenance dose 0.2-1 µg/kg/h until the end of the surgery. It will be stopped to transfer the patient to the ICU.
Propofol recording
Recording registered through the deep brain stimulation electrodes with propofol at plasmatic levels of 0.5, 1, 1.5, 2, 2.5 μg/mL.
Propofol
The target doses are 0.5, 1, 1.5, 2 and 2.5 µg/kg. For its administration we will use the TCI (target controlled infusion) system. After programming each dose we will wait until the plasma and brain concentration of propofol are stabilized in this target and then we will record the local field potentials activity through the DBS. In addition, the subscales of rigidity, tremor and bradykinesia of the UPDRS-III score will be evaluated.
Basal recording
Recording registered through the deep brain stimulation electrodes with no sedation .
No interventions assigned to this group
Interventions
Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.
Dexmedetomidine
Patients will receive a loading dose of 1 µg/kg in 10 min before starting the surgery. The maintenance dose will be 0.2-1 µg/kg/h for a Ramsey Sedation Score of 3-4 during the surgery´s preparation. It will be reduced to 0.2 µg/kg/h 15 min before starting the microelectrode recording for a Ramsey Sedation Score of 2. After the placement of the deep brain stimulator we will record the local field potentials activity. In addition, the subscales of rigidity, tremor and bradykinesia of the Unified Parkinson's Disease Rating Scale (UPDRS-III) score will be evaluated. Once the deep brain stimulator recording and neurologic exploration will be over patients will receive a maintenance dose 0.2-1 µg/kg/h until the end of the surgery. It will be stopped to transfer the patient to the ICU.
Propofol
The target doses are 0.5, 1, 1.5, 2 and 2.5 µg/kg. For its administration we will use the TCI (target controlled infusion) system. After programming each dose we will wait until the plasma and brain concentration of propofol are stabilized in this target and then we will record the local field potentials activity through the DBS. In addition, the subscales of rigidity, tremor and bradykinesia of the UPDRS-III score will be evaluated.
Other Intervention Names
Discover alternative or legacy names that may be used to describe the listed interventions across different sources.
Eligibility Criteria
Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.
Inclusion Criteria
* Older than 18 years old.
* The patient is scheduled for DBS electrode placement for PD treatment by his neurologist.
Exclusion Criteria
* Cardiac blockade (types 2 and 3) without an implanted pacemaker
* Low blood pressure (mean \< 60 mmHg) or symptoms of low cardiac output.
* Severe cerebrovascular disease.
* Pregnancy or nursing mothers.
18 Years
ALL
No
Sponsors
Meet the organizations funding or collaborating on the study and learn about their roles.
Clinica Universidad de Navarra, Universidad de Navarra
OTHER
Responsible Party
Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.
Principal Investigators
Learn about the lead researchers overseeing the trial and their institutional affiliations.
Martínez S Antonio, Doctor
Role: PRINCIPAL_INVESTIGATOR
Staff of the deparment of Anestesiology
Locations
Explore where the study is taking place and check the recruitment status at each participating site.
University of Navarra Clinic
Pamplona, Navarre, Spain
Countries
Review the countries where the study has at least one active or historical site.
References
Explore related publications, articles, or registry entries linked to this study.
Krack P, Batir A, Van Blercom N, Chabardes S, Fraix V, Ardouin C, Koudsie A, Limousin PD, Benazzouz A, LeBas JF, Benabid AL, Pollak P. Five-year follow-up of bilateral stimulation of the subthalamic nucleus in advanced Parkinson's disease. N Engl J Med. 2003 Nov 13;349(20):1925-34. doi: 10.1056/NEJMoa035275.
Hamani C, Richter E, Schwalb JM, Lozano AM. Bilateral subthalamic nucleus stimulation for Parkinson's disease: a systematic review of the clinical literature. Neurosurgery. 2005 Jun;56(6):1313-21; discussion 1321-4. doi: 10.1227/01.neu.0000159714.28232.c4.
Poon CC, Irwin MG. Anaesthesia for deep brain stimulation and in patients with implanted neurostimulator devices. Br J Anaesth. 2009 Aug;103(2):152-65. doi: 10.1093/bja/aep179. Epub 2009 Jun 25.
Sassi M, Zekaj E, Grotta A, Pollini A, Pellanda A, Borroni M, Pacchetti C, Menghetti C, Porta M, Servello D. Safety in the use of dexmedetomidine (precedex) for deep brain stimulation surgery: our experience in 23 randomized patients. Neuromodulation. 2013 Sep-Oct;16(5):401-6; discussion 406. doi: 10.1111/j.1525-1403.2012.00483.x. Epub 2012 Jul 10.
Rozet I, Muangman S, Vavilala MS, Lee LA, Souter MJ, Domino KJ, Slimp JC, Goodkin R, Lam AM. Clinical experience with dexmedetomidine for implantation of deep brain stimulators in Parkinson's disease. Anesth Analg. 2006 Nov;103(5):1224-8. doi: 10.1213/01.ane.0000239331.53085.94.
Reck C, Florin E, Wojtecki L, Krause H, Groiss S, Voges J, Maarouf M, Sturm V, Schnitzler A, Timmermann L. Characterisation of tremor-associated local field potentials in the subthalamic nucleus in Parkinson's disease. Eur J Neurosci. 2009 Feb;29(3):599-612. doi: 10.1111/j.1460-9568.2008.06597.x. Epub 2009 Jan 28.
Rodriguez-Oroz MC, Lopez-Azcarate J, Garcia-Garcia D, Alegre M, Toledo J, Valencia M, Guridi J, Artieda J, Obeso JA. Involvement of the subthalamic nucleus in impulse control disorders associated with Parkinson's disease. Brain. 2011 Jan;134(Pt 1):36-49. doi: 10.1093/brain/awq301. Epub 2010 Nov 8.
Urrestarazu E, Iriarte J, Alegre M, Clavero P, Rodriguez-Oroz MC, Guridi J, Obeso JA, Artieda J. Beta activity in the subthalamic nucleus during sleep in patients with Parkinson's disease. Mov Disord. 2009 Jan 30;24(2):254-60. doi: 10.1002/mds.22351.
Rodriguez-Oroz MC, Obeso JA, Lang AE, Houeto JL, Pollak P, Rehncrona S, Kulisevsky J, Albanese A, Volkmann J, Hariz MI, Quinn NP, Speelman JD, Guridi J, Zamarbide I, Gironell A, Molet J, Pascual-Sedano B, Pidoux B, Bonnet AM, Agid Y, Xie J, Benabid AL, Lozano AM, Saint-Cyr J, Romito L, Contarino MF, Scerrati M, Fraix V, Van Blercom N. Bilateral deep brain stimulation in Parkinson's disease: a multicentre study with 4 years follow-up. Brain. 2005 Oct;128(Pt 10):2240-9. doi: 10.1093/brain/awh571. Epub 2005 Jun 23.
Venkatraghavan L, Manninen P. Anesthesia for deep brain stimulation. Curr Opin Anaesthesiol. 2011 Oct;24(5):495-9. doi: 10.1097/ACO.0b013e32834a894c.
Venkatraghavan L, Luciano M, Manninen P. Review article: anesthetic management of patients undergoing deep brain stimulator insertion. Anesth Analg. 2010 Apr 1;110(4):1138-45. doi: 10.1213/ANE.0b013e3181d2a782. Epub 2010 Feb 8.
Raz A, Eimerl D, Zaidel A, Bergman H, Israel Z. Propofol decreases neuronal population spiking activity in the subthalamic nucleus of Parkinsonian patients. Anesth Analg. 2010 Nov;111(5):1285-9. doi: 10.1213/ANE.0b013e3181f565f2. Epub 2010 Sep 14.
Steigerwald F, Hinz L, Pinsker MO, Herzog J, Stiller RU, Kopper F, Mehdorn HM, Deuschl G, Volkmann J. Effect of propofol anesthesia on pallidal neuronal discharges in generalized dystonia. Neurosci Lett. 2005 Oct 7;386(3):156-9. doi: 10.1016/j.neulet.2005.06.012.
Rozet I. Anesthesia for functional neurosurgery: the role of dexmedetomidine. Curr Opin Anaesthesiol. 2008 Oct;21(5):537-43. doi: 10.1097/ACO.0b013e32830edafd.
Elias WJ, Durieux ME, Huss D, Frysinger RC. Dexmedetomidine and arousal affect subthalamic neurons. Mov Disord. 2008 Jul 15;23(9):1317-20. doi: 10.1002/mds.22080.
Other Identifiers
Review additional registry numbers or institutional identifiers associated with this trial.
DEXPROPAR
Identifier Type: -
Identifier Source: org_study_id