Evaluation of Neuronal Damage in Patients Undergoing Robot-assisted Laparoscopic Radical Prostatectomy With Biomarkers

July 28, 2026 updated by: İlker Onguc Aycan, Akdeniz University

Evaluation of Intraoperative Neuronal Damage in Patients Undergoing Robot-assisted Laparoscopic Radical Prostatectomy With S100beta, GFAP and NSE Biomarkers

Robotic assisted laparoscopic surgery has become an alternative to open or laparoscopic technique in various surgical fields. Robot assisted laparoscopic surgery is preferred by surgeons and patients due to easy accessibility, lower blood loss and lower transfusion rates. However, robotic assisted laparoscopic surgery can cause significant changes in cardiovascular, respiratory, metabolic and cerebral physiology because it requires a deep trendy position. When long -lasting deep trendelenburg position is applied, the cerebral autoregulation is impaired. In the literature, the presence of cases with brain edema is shown.

In recent years, many biomarkers have been used in the evaluation of brain damage. S100 Calcium Binding Protein (S100β), N Ron specific enolase (NSE), Glial Fibrils are among the biomarkers used to show acidic protein (GFAP) brain damage. The S100β is specific and is mainly produced by astrocytes and enters the bloodstream after neuron damage. Glial fibrils is an acidic protein (GFAP), a protein encoded by the GFAP gene in humans, an intermediate filament protein produced in the central nervous system. Neuron specific enolase (NSE) is one of the enzymes that increase brain damage encoded by Enolase 2 (ENO2) gene.

Mini Mental State Examination and Montreal Cognitive Assessment will be performed to determine neurological changes developing in patients.

The purpose of this study; Robotic assisted laparoscopic surgery is to examine the brain damage that may develop in patients due to deep trendelenburg position in patients with the said biomarkers and to evaluate the anesthesia methods applied in these surgery in line with the study results.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
59

Contacts and Locations

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

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

Patients aged 18-75 who were operated on under general anesthesia for RALRP surgery

Description

Inclusion Criteria:

  • All patients aged 18-75 who were operated on under general anesthesia for RALRP surgery and agreed to participate in the study will be included.

Exclusion Criteria:

  • Participants who did not accept the study, had active intracranial pathology and history of intracranial pathology will not be included in the study.

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

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Group with Sevoflurane
The Sevoflurane used for maintenance of general anesthesia
Diagnostic test: Mini Mental State Examination(MMSE),Montreal Cognitive Assessment ( MoCA),S100B ( protein S100 subunit beta) ,GFAP ( glial fibrillary acidic protein ),NSE ( neuron-specific enolase )
MMSE and MoCA will be applied preoperative,postoperative first day and fourth day S100B,GFAP and NSE will be measured in blood tests preoperative,postoperative second hour,postoperative 24. hour and postoperative 96. hour
Group with Propofol
The Propofol (IV) used for maintenance of general anesthesia
Diagnostic test: Mini Mental State Examination(MMSE),Montreal Cognitive Assessment ( MoCA),S100B ( protein S100 subunit beta) ,GFAP ( glial fibrillary acidic protein ),NSE ( neuron-specific enolase )
MMSE and MoCA will be applied preoperative,postoperative first day and fourth day S100B,GFAP and NSE will be measured in blood tests preoperative,postoperative second hour,postoperative 24. hour and postoperative 96. hour

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change From Baseline in Serum S100 Beta (S100β) Concentration
Time Frame: Preoperative baseline and postoperative 1, 24, and 96 hours
Serum S100 beta (S100β) concentration was measured using a commercially available sandwich enzyme-linked immunosorbent assay and reported in ng/L. Change from the preoperative baseline concentration was evaluated at each postoperative measurement time point. A positive change indicates an increase and a negative change indicates a decrease relative to baseline.
Preoperative baseline and postoperative 1, 24, and 96 hours
Change From Baseline in Serum Neuron-Specific Enolase (NSE) Concentration
Time Frame: Preoperative baseline and postoperative 1, 24, and 96 hours
Serum neuron-specific enolase (NSE) concentration was measured using a commercially available sandwich enzyme-linked immunosorbent assay and reported in ng/mL. Change from the preoperative baseline concentration was evaluated at each postoperative measurement time point. A positive change indicates an increase and a negative change indicates a decrease relative to baseline.
Preoperative baseline and postoperative 1, 24, and 96 hours
Change From Baseline in Serum Glial Fibrillary Acidic Protein (GFAP) Concentration
Time Frame: Preoperative baseline and postoperative 1, 24, and 96 hours
Serum glial fibrillary acidic protein (GFAP) concentration was measured using a commercially available sandwich enzyme-linked immunosorbent assay and reported in ng/mL. Change from the preoperative baseline concentration was evaluated at each postoperative measurement time point. A positive change indicates an increase and a negative change indicates a decrease relative to baseline.
Preoperative baseline and postoperative 1, 24, and 96 hours

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change From Baseline in Mini-Mental State Examination (MMSE) Total Score
Time Frame: Preoperative baseline and postoperative 6, 24, and 96 hours
Cognitive performance was assessed using the Mini-Mental State Examination (MMSE). The total score ranges from 0 to 30, with higher scores indicating better cognitive performance. Change from the preoperative baseline score was evaluated at each postoperative assessment. A negative change indicates a lower postoperative score relative to baseline.
Preoperative baseline and postoperative 6, 24, and 96 hours
Change From Baseline in Montreal Cognitive Assessment (MoCA) Total Score
Time Frame: Preoperative baseline and postoperative 6, 24, and 96 hours
Cognitive performance was assessed using the Montreal Cognitive Assessment (MoCA). The total score ranges from 0 to 30, with higher scores indicating better cognitive performance. Change from the preoperative baseline score was evaluated at each postoperative assessment. A negative change indicates a lower postoperative score relative to baseline.
Preoperative baseline and postoperative 6, 24, and 96 hours
Number of Participants With an MMSE Total Score of 24 or Lower
Time Frame: Postoperative 6, 24, and 96 hours
At each postoperative assessment, participants with a Mini-Mental State Examination (MMSE) total score of 24 or lower were categorized as having threshold-based early cognitive performance decline. This threshold was used descriptively and was not intended to establish a formal diagnosis of postoperative neurocognitive disorder.
Postoperative 6, 24, and 96 hours
Number of Participants With a MoCA Total Score of 21 or Lower
Time Frame: Postoperative 6, 24, and 96 hours
At each postoperative assessment, participants with a Montreal Cognitive Assessment (MoCA) total score of 21 or lower were categorized as having threshold-based early cognitive performance decline. This threshold was used descriptively and was not intended to establish a formal diagnosis of postoperative neurocognitive disorder.
Postoperative 6, 24, and 96 hours

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Akdeniz University

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
March 8, 2022

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 28, 2024

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
September 17, 2024

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
January 12, 2023

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 12, 2023

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
January 20, 2023

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 29, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 28, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • Neuronal damage in RALRP

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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