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Vasopressor Effects in Anesthetized Patients

NCT02713087 · Status: COMPLETED · Phase: PHASE4 · Type: INTERVENTIONAL · Enrollment: 48

Last updated 2018-10-26

No results posted yet for this study

Summary

Project title: Influence of Vasopressors on Brain Oxygenation and Microcirculation in Anesthetized Patients with Cerebral Tumors

Sponsor-investigator: Klaus Ulrik Koch M.D.

Sponsor: Department of Anesthesia Aarhus University Hospital, Nørrebrogade 44, 8000 Aarhus C, Denmark

Objective:

To investigate whether phenylephrine and ephedrine causes different alterations in microcirculation and oxygenation, as measured with MRI and PET, in anesthetized patients with brain tumors. Using MRI and PET, the study will assess whether there is a difference in deoxyhemoglobin concentration (Bold signal), CTTH, cerebral blood flow (CBF) and cerebral metabolic rate of oxygen (CMRO2) between ephedrine and phenylephrine

Method:

Double blinded controlled randomized clinical trial. Either phenylephrine or ephedrine are infused intravenously under general anesthesia. MRI is performed in 20 patients before and after infusion. PET/CT is performed in 20 patients before and after infusion. BIS and NIRS monitoring will be used in either scanner. After scanning patients are transported to the operating theatre and the craniotomy is performed. After removal of the bone flap subdural ICP is measured and recorded.

MRI to analyze CBF, CTH, max.CMRO2, maxOEF, CBV and grey-scale ADC before and after ephedrine and phenylephrine. PET/CT to analyze CBF and CMRO2 before and after ephedrine and phenylephrine and calculation of OEF. During each PET/CT scan session oxygen saturation and hemoglobin concentration is measured.

Data from the proposed studies will add substantial new knowledge to the investigators current understanding of the effects of vasopressors on cerebral circulation. This information will aid the neuroanesthesiologist, neurointensivist and the neurosurgeon in the choice of the optimal method to manage cerebral perfusion pressure during craniotomy for brain tumor.

Conditions

Interventions

DRUG

Ephedrine

Infusion of Ephedrine 2mg/ml until MAP above 60 mmHg or until MAP has raised 20%

DRUG

Phenylephrine

Infusion of Phenylephrine 0,1mg/ml until MAP above 60 mmHg or until MAP has raised 20%

Sponsors & Collaborators

  • University of Aarhus

    lead OTHER

Principal Investigators

  • Leif Oestergaard, Professor · University of Aarhus

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
75 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2015-09-30
Primary Completion
2017-11-30
Completion
2017-11-30

Countries

  • Denmark

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02713087 on ClinicalTrials.gov