Clinical trial NCT00615472: Intravenous Versus Inhalational Anesthesia in Parkinson's Disease
Official title: Intravenous General Anesthesia Versus Inhalational General Anesthesia in Parkinson's Disease
Study type: INTERVENTIONAL
Overall status: TERMINATED
Phase: NA
Conditions: Parkinson's Disease
Keywords: Parkinson's Disease
Deep brain stimulation (DBS)
Subthalamic Nucleus
Total Intravenous Anesthesia
Inhalational Anesthesia
Lead sponsor: Columbia University
Sponsor class: OTHER
First posted: 2008-02-14
Enrollment: 58
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: DIAGNOSTIC

Brief summary: Parkinson's disease is a common progressive degenerative disease affecting 3% of all patients over the age of 65. Given their age and frailty, these patients frequently require surgical procedures with general anesthesia. However, after surgery, patients with Parkinson's disease have longer hospital stays and a greater chance of not returning to independent living compared to age-matched controls (Berman MF, unpublished data). In part, this is due to a higher rate of post-operative delirium, which had an incidence of 60% in this population in one study. There is anecdotal evidence from neurologists specializing in movement disorder suggesting that there is also significant deterioration in parkinsonian motor symptoms and cognition lasting for months or years following surgery and anesthesia. The basis for this deterioration is unknown. We hypothesize that these problems are caused by particular medications used during inhaled anesthesia for surgical procedures.

Detailed description: We will compare the groups in terms of postoperative delirium, and cognitive and motor function changes. Patients randomized to an inhaled anesthetic will receive a standard anesthetic mix: an inhaled anesthetic with intravenous agents for rapid induction of anesthesia, narcotics for postoperative pain relief, and muscle relaxation. Patients randomized to IV anesthesia will receive a continuous infusion of propofol and remifentanil (ultrashort acting narcotic) instead of the inhalation anesthetics during the maintenance phase of the anesthetic. Other components of the anesthetic will be the same as in the "inhaled anesthetic" group.

We hypothesize that:

1. Patients with Parkinson's disease will have less postoperative delirium and less prolonged cognitive and motor changes after total intravenous anesthesia than following inhaled anesthesia.
2. Apolipoprotein E4 (Apo E4) allele will be associated with postoperative cognitive dysfunction in Parkinsonian patients

To test our hypotheses we will:

1. Randomize patients with Parkinson's disease having surgery for implantation of current generator for subthalamic stimulator to receive either a total intravenous anesthetic or an inhaled anesthetic.
2. Compare these two groups of patients for incidence of postoperative delirium and the degree of postoperative cognitive and motor dysfunction.
3. Test for an association between the (Apo E4) allele and postoperative cognitive change. A buccal sampling or cheek cell sampling method will be employed to obtain DNA for genotyping of the Apo E allele.

During the procedure, maintenance of anesthesia will differ for the two groups:

Group 1 Inhaled anesthesia: Patients will be maintained on oxygen and isoflurane 0 to 4%, titrated as needed to maintain a standard blood pressure (standard practice).

Group 2 Intravenous anesthesia: Patients will be ventilated with 50% oxygen in air. Patients will receive continuous propofol infusion 0.05 mg/kgmin to 0.15 mg/kgmin titrated as needed; and remifentanil (ultrashort acting narcotic) 0.1 ug/kgmin to 0.5 ug/kgmin. These will be titrated as needed to maintain a standard blood pressure. Both infusions will be turned off at the end of the procedure.

Testing of Motor and Cognitive Status. Patients who participate in the study will be given a mental status examination, tests of Parkinsonian motor symptoms, and tests of cognitive function in the preoperative period before implantation of the subthalamic electrodes and implantation of current generators. Subsets of these tests will be performed several times postoperatively (1 month and 4 months)

Implantation of Electrode (Stage I sedation anesthesia) Full testing will be done in the preoperative period. Patients are generally kept in the hospital overnight and discharged the following day. Mental status will be rechecked by the MMSE in the recovery room postoperatively .

Patients will be contacted by telephone to have their mental status assessed by telephone using using two well known examinations (Telephone Interview for Cognitive Status (TICS) and Centers for Disease Control and Prevention Health-Related Quality-of-Life 14Item Measure (CDC HRQOL14)) and a series of questions investigating how well patients are able to perform activities of daily living (ADLs) and instrumental activities of daily living (IADLs). These tests will be given at two time points, once before the surgery and then one month after surgery. We will look for changes in quality of life that may correlate with neuropsychometric test performance.

Eligibility criteria: Inclusion Criteria:

* Clinical diagnosis of Parkinson's Disease with bilateral deep brain stimulation surgery indicated as treatment

Exclusion Criteria:

* Not fluent in English

Primary outcomes:
measure: Number of Participants With Improved Postoperative Delirium and Cognitive and Motor Changes
timeFrame: Four months
Secondary outcomes:
Other outcomes:
Locations:
city: New York
country: United States
facility: Columbia Unviversity, Deparment of Anesthesiology
state: New York
Study officials:
affiliation: Columbia University
name: Eric J Heyer, M.D., Ph.D.
role: PRINCIPAL_INVESTIGATOR
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