Hypotension
Conditions
Keywords
hypotension, low blood pressure, vasopressor need
Brief summary
Aim of this study is to determine the effect of isoflurane versus sevoflurane on blood pressure and systemic vascular resistance.
Detailed description
In modern anesthesia a variety of volatile anesthetics is available. In cardiac anesthesiology both isoflurane and sevoflurane are frequently used. At present the number of studies comparing the influence of isoflurane and sevoflurane on blood pressure and systemic vascular resistance is limited. Moreover, the results presented in the available literature are inconsistent. The decision as to which of both volatiles should be used during cardiac surgery is not evidence-based, but is based on personal preference of the anesthesist. The most reliable way to compare the effects of isoflurane and sevoflurane on blood pressure and systemic vascular resistance is a randomized controlled trial in patients during Cardiopulmonary bypass (CPB).
Interventions
DRUGSevoflurane and isoflurane
Patients will be randomized to a 10 minute treatment with isoflurane, followed by a wash-out period, followed by a 10 minute treatment with sevoflurane, or the other way round.
Sponsors
UMC Utrecht
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* competent adult patients (18 years or older)undergoing elective coronary artery bypass grafting with the use of the cardiopulmonary bypass.
Exclusion criteria
* Patients undergoing valve surgery or combined surgical procedures (e.g. coronary artery bypass grafting in combination with valve reconstruction. * uncontrolled hypertension * a poor left ventricular function * renal failure * a body mass index of \> 25 * history of cerebrovascular accident, transient ischemic accident or carotid artery stenosis.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Total amount of the vasopressor phenylephrine that is needed to maintain blood pressure above 60 mmHg during 10 minutes of Cardiopulmonary bypass. | 10 minutes |
Secondary
| Measure | Time frame |
|---|---|
| Mean blood pressure throughout the 10 minute periods, the need for a stronger vasopressor (norepinephrine) and the inability to keep mean blood pressure below 75 mmHg at MAC 0.6. | 10 minutes |
Countries
Netherlands
Outcome results
None listed