Pre-operative Neurocognitive Disorder and Low Near-infrared Spectrometry is Associated With Postoperative Delirium

NCT ID: NCT03171766

Last Updated: 2017-06-26

Basic Information

• Recruitment Status: UNKNOWN
• Total Enrollment: 100 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2017-06-15
• Study Completion Date: 2017-12-31

Brief Summary

The main goal of the investigation is to identify the incidence of cognitive dysfunction and POD in patients older than 65 years of age undergoing neurosurgical elective surgery and determine if an association between cognitive dysfunction, basal NIRS and POD exists.

Detailed Description

Postoperative delirium (POD) is a common problem among elders who undergo surgery and anesthesia, with major health consequences. This investigation is expected to clarify and understand the role of neurocognitive reserve in the occurrence of POD, provide grounds to preoperative cognitive risk stratification and early preventive interventions to improve patients' outcomes. The surgical procedure and anesthesia are stressor events that interact with underlying risk factors and play an important role in the development of POD. Evidence is lacking to make recommendations on anesthesia related perioperative interventions. This investigation will contribute to better understand the association between types of anesthesia, medications, monitoring and other anesthesia related factors that can be a target for preventive interventions. This research will add knowledge and clarify the role of predictors and precipitant factors that might enlighten future research on risk stratification models and interventions, prognostic significance, and treatment implications for POD.

All patients scheduled for Neurosurgery will be approached the day before surgery to assess if inclusion criteria are met and obtain informed consent. If so, preoperative evaluation will be performed by two nurse investigators responsible for admission of patients in the Neurosurgical ward.

The Mini-Cog test and the will be administered before surgery to all participants as cognitive assessment tool. The social-economical status will be evaluated regarding the level of education in years, level of physical activity, occupation, income and number of languages spoken (all categorized with appropriate scales). Also, during the preoperative evaluation, demographic data, alcohol consumption, smoking, use of visual or hearing aids, comorbidities, usual medication and preoperative laboratory test results will be obtained and recorded in a form. On the day of the surgery, as the patient arrives at the Operating Room (OR), the anesthesiologist will check for informed consent and the patient will be monitored with the following with the standard ASA protocol.

The Near-infrared spectroscopy (NIRS) is a technology widely used in clinical investigation as an index of brain and tissue oxygenation. The INVOS© Cerebral/Somatic Oximetry is used in high-risk patients or surgeries to provide continuous, real-time, regional oxygen saturation (rSO2. The monitoring parameters, excluding the INVOS©, will be continuously recorded on the software program RugloopII© Waves (Demed, Genk, Belgium).

In the Post-Anesthesia Care Unit (PACU) the infrared pupillometer will be used to measure the patient pupillary reflexes 15 minutes after admission and before PACU discharge.

All included patients will be followed postoperatively from day 1 to the last day in-hospital, if hospitalized for less than 3 days, or until day 3. The investigator nurse will apply the Nu-DESC daily as a tool to screen delirium. The CAM will be applied to diagnose delirium if the patient is screened with POD. Pain will be evaluated using a standard 100mm VAS for pain (VAS=0 no pain, VAS=100 worst pain). Before hospital discharge all participants will retake the Mini-Cog test and the MMSE.

Conditions

Neurocognitive Disorders; Postoperative Period; Postoperative Complications

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Interventions

Mini-Mental State Examination (MMSE)

It is simple scored form of the cognitive mental status examination which includes eleven questions and requires only 5 to 10 minutes.

Intervention Type: DIAGNOSTIC_TEST

Visual Analog Scale (VAS)

Visual Analog Scale (VAS) for pain score (including aphasia, motor disability, major neurocognitive disorder, etc)

Intervention Type: DIAGNOSTIC_TEST

Mini Cog test

The Mini-Cog© test is another validated and simple tool to screen for dementia and cognitive dysfunction. It measures the cognitive reserve at the time of acute stress with a low degree of interobserver variability.

Intervention Type: DIAGNOSTIC_TEST

Eligibility Criteria

Inclusion Criteria

• patients aged 65 years or older scheduled for elective Neurosurgery

Exclusion Criteria

• refusal to give informed consent; inability to understand and cooperate to perform the Mini Cog test, Mini Mental State Examination (MMSE) and Visual Analog Scale (VAS) for pain score (including aphasia, motor disability, major neurocognitive disorder, etc); previous dementia documented on clinical records and Portuguese not first language.

• Minimum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

Centro Hospitalar do Porto

OTHER

Sponsor Role: lead

Responsible Party

Pedro Amorim, MD

MD

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Maria J Susano, MD

Role: PRINCIPAL_INVESTIGATOR

Centro Hospitalar do Porto

Humberto Machado, PhD

Role: STUDY_CHAIR

Centro Hospitalar do Porto

Pedro Amorim, MD

Role: PRINCIPAL_INVESTIGATOR

Centro Hospitalar do Porto

Locations

Centro Hospitalar do Porto

Porto, , Portugal

Site Status: RECRUITING

Countries

Portugal

Central Contacts

Pedro Amorim, MD

Role: CONTACT

amorpedro29f@gmail.com

+ 351 22 207 7549

Facility Contacts

Pedro Amorim, MD

Role: primary

References

Susano MJ, Dias M, Seixas FS, Vide S, Grasfield R, Abelha FJ, Crosby G, Culley DJ, Amorim P. Association Among Preoperative Cognitive Performance, Regional Cerebral Oxygen Saturation, and Postoperative Delirium in Older Portuguese Patients. Anesth Analg. 2021 Mar 1;132(3):846-855. doi: 10.1213/ANE.0000000000005159.

Reference Type: DERIVED

PMID: 33002925 (View on PubMed)

Other Identifiers

2016.253(216-DEFI/205-CES)

Identifier Type: -

Identifier Source: org_study_id