- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02631135
Cognitive Functions After TIVA With Dexmedetomidine
It is important to wake up without any problem and comfortably from the general anesthesia. The aim of this study is to investigate the effects of addition dexmedetomidine to the balanced intravenous anesthesia with propofol over the cognitive functions and also it is considered that the addition of dexmedetomidine would reduce the use of anesthetics drugs in TİVA. Together with this effects, it has been considered that the disorder of the cognitive functions in postoperative period and the need for anesthetic drugs in postoperative period will be less.
After the approval of the Ethics Committee and the patients being informed and taking informed consent from them 15 male 25 female totally 40 patients between the age of 20-60 years old, who had lumbar disc hernia, under general anesthesia have been taken under the study. The patients have been divided into two groups by closed envelope drawing method, randomly. All patients cognitive functions were evaluated by MMSE (Mini Mental State Examination) during the premedication visit. For this study group Standardized Mini Mental Test Examination (SMMT-E) were used, which has quite practical usage, for the untrained patients, and test composed of question-answer in order to calculate the remembering, caution and calculation structure and the scores were recorded. All patients had received the same anesthesia induction with propofol infusion (started at firstly 12 mg. kg-1 for the 30 minutes, the second 30 minutes 9 mg. kg-1 and the BIS(bispectral index) values were arranged between 40-60 until the end of the operation), and remifentanil infusion (0.5 μg.kg-1 was applied as opioid and was arranged according to the tension artery and heart rate). In the dexmedetomidine group, dexmedetomidine infusion had started as 0.5 μg.kg-1 without making the loading dose and the dose change was not made. Rocuronium 0.5 mg. kg-1 iv. was applied for the endotracheal intubation. After the operation all patients have taken to the recovery room.
Then the tests of cognitive function evaluation were repeated as postoperative 2nd hour, 24 hours, 1 week and 1 month.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
After the approve of the Ethics Committee and the patients were informed and taken informed consent form from them (15 male and 25 female) totally 40 patients between the age of 20-60 years old, who had lumbar disc hernia, under general anesthesia have been taken under the study. The patients with hepatic, renal or neurological diseases and using sedative- hypnotic, anticonvulsive and stimulant drugs and pregnant patients were excluded. Then they have been divided into two groups by closed envelope drawing method randomly and were allowed to stay hungry at least 8 hours. All the patients were applied the cognitive functions during the premedication visit MMSE (Mini Mental State Examination) that has quite practical usage and the test called Standardized Mini Mental Test Examination(SMMT-E) for the untrained persons. Test composed of question-answer in order to calculate the remembering, caution and calculation structure. All patients SMMTE scores were recorded. In the operation room, patients were applied the standard D-II derivation electrocardiography, heart beat rate, non-invasive arterial pressure, peripheral oxygen saturation (SpO2) and Bispectral Index (BİS) monitorization. Serum sale infusion was started by opening the vascular access with 18-20 gauge cannula. The skin of forehead and the temporal side were cleaned with alcohol cotton for the BİS monitorization. The electrode in the proximal part of the three electrodes of disposable BİS sensor was adhered to the middle of the forehead; the distal electrode to the temporal area on the eye line and the other electrode in between them both were adhered. The BİS values (BİS Monitor, Aspect, USA) were continuously monitored. The Group I (TİVA, n= 20) were received propofol-remifentanil and the Grup II (TİVA+D, n= 20) propofol- remifentanil and additional dexmedetomidine infusion.
Induction of propofol infusion in all two groups was started as firstly 12 mg. kg-1 for the 30 minutes, the second 30 minutes 9 mg. kg-1 and the BIS values were arranged between 40-60 until the end of the operation. At the same time remifentanil infusion 0.5 μg.kg-1 was applied as opioid and arranged according to the tension artery and heart rate. The dexmedetomidine infusion has been started as 0.5 μg.kg-1 without making the loading dose and the dose change was not made. Rocuronium 0.5 mg. kg-1 iv. was applied for the endotracheal intubation. After intubation the carbon dioxide concentration was recorded in all periods.
The patients were ventilated mechanically after the intubation in order to be ETCO2 (end-tidal carbon dioxide) 30-44 mmHg, tidal volume 8-10 mL. kg-1 . In case of tachycardia or hypertension the opioid dose was reduced in case of bradycardia or hypertension while the opioid dose was being increased. Propofol infusion was arranged to be kept in between BİS score 40-50. The effect of the used muscle relaxant was returned by neostigmine 0,05- 0,07 mg. kg-1 i.v. and atropin 0,03 mg. kg -1 i.v. After the operation all patients have been taken to the recovery room.
Then the tests of cognitive function evaluation were repeated as postoperative 2nd hour, 24 hours, 1 week and 1 month.
Study Type
Enrollment (Actual)
Phase
- Phase 4
Contacts and Locations
Study Locations
-
-
-
Bursa, Turkey
- Uludag University
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- under going lumbar disk hernia operation
- 20-60 years old
- ASA (American Society of Anesthesiologists Physical Status classification) classification I-II
Exclusion Criteria:
- pregnants
- Patients with hepatic, renal or neurological diseases and
- patients using sedative- hypnotic, anticonvulsive and stimulant drugs
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Placebo Comparator: Group 1 (TIVA)
Only propofol (started as firstly 12 mg.
kg-1 for the 30 minutes, the second 30 minutes 9 mg.
kg-1) and remifentanil infusion (0.5 μg.kg-1)
|
In case of tachycardia or hypertension the opioid dose was reduced, in case of bradycardia or hypertension the opioid dose was increased
Other Names:
BIS values were arranged 40-60 until the end of operation
0.5 mg/kg iv for intubation, no change
Other Names:
|
Active Comparator: Group 2 (TIVA+D)
Propofol started as firstly 12 mg.
kg-1 for the 30 minutes, the second 30 minutes 9 mg.
kg-1) and remifentanil infusion (0.5 μg.kg-1),and also dexmedetomidine infusion (started as 0.5 μg.kg-1 without making the loading dose and the dose change was not made during the operation)
|
In case of tachycardia or hypertension the opioid dose was reduced, in case of bradycardia or hypertension the opioid dose was increased
Other Names:
BIS values were arranged 40-60 until the end of operation
0.5 mg/kg iv for intubation, no change
Other Names:
0.5 microgram/kg infusion, no changes
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
all patients cognitive functions examination by MMSE (Mini Mental State Examination) test
Time Frame: 2nd hour
|
The cognitive function evaluation performed by MMSE test at the second hour of the surgery
|
2nd hour
|
all patients cognitive functions examination by MMSE (Mini Mental state examination)
Time Frame: change from baseline in cognitive functions at one year
|
The MMSE test evaluation performed by MMSE test at 24th hour, 1 week, 1 year after the surgery
|
change from baseline in cognitive functions at one year
|
Collaborators and Investigators
Sponsor
Investigators
- Study Director: Hulya Bilgin, professor, Uludag University
Publications and helpful links
General Publications
- Gurbet A, Basagan-Mogol E, Turker G, Ugun F, Kaya FN, Ozcan B. Intraoperative infusion of dexmedetomidine reduces perioperative analgesic requirements. Can J Anaesth. 2006 Jul;53(7):646-52. doi: 10.1007/BF03021622.
- Molloy DW, Standish TI. A guide to the standardized Mini-Mental State Examination. Int Psychogeriatr. 1997;9 Suppl 1:87-94; discussion 143-50. doi: 10.1017/s1041610297004754.
- Magni G, Baisi F, La Rosa I, Imperiale C, Fabbrini V, Pennacchiotti ML, Rosa G. No difference in emergence time and early cognitive function between sevoflurane-fentanyl and propofol-remifentanil in patients undergoing craniotomy for supratentorial intracranial surgery. J Neurosurg Anesthesiol. 2005 Jul;17(3):134-8. doi: 10.1097/01.ana.0000167447.33969.16.
- Weinbroum AA, Geller E. Flumazenil improves cognitive and neuromotor emergence and attenuates shivering after halothane-, enflurane- and isoflurane-based anesthesia. Can J Anaesth. 2001 Nov;48(10):963-72. doi: 10.1007/BF03016585.
- Kostopanagiotou G, Markantonis SL, Polydorou M, Pandazi A, Kottis G. Recovery and cognitive function after fentanyl or remifentanil administration for carotid endarterectomy. J Clin Anesth. 2005 Feb;17(1):16-20. doi: 10.1016/j.jclinane.2004.03.008.
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Nervous System Diseases
- Neurologic Manifestations
- Neurobehavioral Manifestations
- Confusion
- Physiological Effects of Drugs
- Adrenergic Agents
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Central Nervous System Depressants
- Peripheral Nervous System Agents
- Analgesics
- Sensory System Agents
- Anesthetics, Intravenous
- Anesthetics, General
- Anesthetics
- Analgesics, Non-Narcotic
- Adrenergic alpha-2 Receptor Agonists
- Adrenergic alpha-Agonists
- Adrenergic Agonists
- Analgesics, Opioid
- Narcotics
- Hypnotics and Sedatives
- Neuromuscular Agents
- Neuromuscular Nondepolarizing Agents
- Neuromuscular Blocking Agents
- Remifentanil
- Propofol
- Dexmedetomidine
- Rocuronium
Other Study ID Numbers
- 2007-21/18
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