The Effect of Blood Pressure on the Postoperative Cognitive Dysfunction

August 21, 2018 updated by: Dostalova Vlasta, MD, PhD, University Hospital Hradec Kralove

The Effect of the Perioperative Blood Pressure on the Onset of Postoperative Cognitive Dysfunction in Adults

Permanent and temporary cognitive impairment in the perioperative period is of great importance to patients. Hypoperfusion due to the intraoperative hypotension is often mentioned as a possible cause of postoperative cognitive dysfunction.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

All patients aged above 60 years undergoing planned spinal surgery in the prone position in the duration of 1-3 hours under general anesthesia will be included in the study. In group L (liberal), the value of blood pressure will be corrected with the change of mean arterial pressure (MAP) ± 25% patient's mean arterial pressure, and group R (restrictive) with the change of MAP ± 10%. Cognitive dysfunction tests will be executed on the day before the surgery, two hours after the surgery and on the third postoperative day. Anesthesia will be managed according to the standardised protocol. Concentration of desflurane will be adjusted according to entropy values (target 40-50). Analgetics will be applied according to surgical pleth index (SPI) values. Sufentanil will not be applied in the last 15 minutes. Extubation will be performed at the operating theatre when meeting all extubation criteria including train of four ratio (TOFR) above 92%. Neither syntophyllin, nor pharmacological decurarization (syntostigmin) will be applied to the patients.

Study Type

Interventional

Enrollment (Actual)

100

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Czechia
      • Hradec Kralove, Czechia, 50005
        • University hospital Hradec Králové

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

60 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • GCS 15
  • ASA risk I - III
  • planned spinal surgery in the prone position
  • duration of the procedure of 1-3 hours

Exclusion Criteria:

  • hypertension above 180/100 torr preoperatively
  • blood pressure below 130/80 torr preoperatively

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Liberal group
During the surgery, blood pressure of the patients will be maintained within ± 25% of the patient's normal blood pressure.
Procedure: Liberal group
If the pressure decreases below 75% of patient's baseline mean arterial pressure for more than 1 min, continuous application of noradrenalin will be initiated. If the blood pressure increases above 125% of patient's baseline mean arterial pressure for more than 1 min, Ebrantil (urapidil hydrochlorid) will be applied in dose of 5 mg intravenously with the possibility of repeated doses in 2 minutes intervals.
Experimental: Restrictive group
During the surgery, blood pressure of the patients will be maintained within ± 10% of the patient's normal blood pressure.
Procedure: Restrictive group
If the pressure decreases below 90% of patient's baseline mean arterial pressure for more than 1 min, continuous application of noradrenalin will be initiated. If the blood pressure increases above 110% of patient's baseline mean arterial pressure for more than 1 min, Ebrantil (urapidil hydrochlorid) will be applied in dose of 5 mg intravenously with the possibility of repeated doses in 2 minutes intervals.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in cognitive behavior
Time Frame: within the first 3 days after surgery
measured by Addenbrooks cognitive test
within the first 3 days after surgery

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University Hospital Hradec Kralove

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

September 1, 2015

Primary Completion (Actual)

June 1, 2018

Study Completion (Actual)

July 1, 2018

Study Registration Dates

First Submitted

August 27, 2015

First Submitted That Met QC Criteria

August 31, 2015

First Posted (Estimate)

September 1, 2015

Study Record Updates

Last Update Posted (Actual)

August 22, 2018

Last Update Submitted That Met QC Criteria

August 21, 2018

Last Verified

August 1, 2018

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 201508-S21P

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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