Neuropathic Evaluation of Postoperative Pain (DN4-SFAR)

July 7, 2016 updated by: Rennes University Hospital

Evaluation du caractère Neuropathique Des Douleurs Post opératoires. Enquête 2 Jours : DN4-SFAR

Chronic postsurgical pain (CPSP) is defined by pain persisting longer than 2 months after surgery (1). Its incidence varies from 10 to 50 % in the literature (2). A high proportion of CPSP is neuropathic (CPSNP) (4). Postoperative pain is traditionally classified as nociceptive pain and the more intense is this pain on a numeric pain scale (NPS), higher are the risks of pain chronicization and the duration of the severe pain is longer (5,6). However, acute neuropathic pain (ANP) can be present in the postoperative setting. However, data on the prevalence of ANP immediately after surgery are scarce and no screening tool has been validated so far in this setting. Therefore, the first objective of this multicenter observational study is to prospectively describe the incidence of APSNP in a large population using the DN4 questionnaire. The second objective of our study is to confirm the hypothetic link between APSNP and CPSNP at 1 and 2 months after surgery in a large population. It is hypothesized that the systematic use of the DN4 questionnaire in postoperative could help detect patients at risk of CPSNP.

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.

Detailed Description

Chronic postsurgical pain (CPSP) is defined by pain persisting longer than 2 months after surgery (1). Its incidence varies from 10 to 50 % in the literature (2). A high proportion of CPSP is neuropathic (CPSNP) (4). Postoperative pain is traditionally classified as nociceptive pain and the more intense is this pain on a numeric pain scale (NPS), higher are the risks of pain chronicization and the duration of the severe pain is longer (5,6). However, acute neuropathic pain (ANP) can be present in the postoperative setting. However, data on the prevalence of ANP immediately after surgery are scarce and no screening tool has been validated so far in this setting. Therefore, the first objective of this multicenter observational study is to prospectively describe the incidence of APSNP in a large population using the DN4 questionnaire. The second objective of our study is to confirm the hypothetic link between APSNP and CPSNP at 1 and 2 months after surgery in a large population. It is hypothesized that the systematic use of the DN4 questionnaire in postoperative could help detect patients at risk of CPSNP.

Methods:

Investigators and centers will be recruited through the SFAR (French Society of Anesthesiology and Intensive Care) research network. The study will take place during the same 2 consecutive days in all the centers in France. Each center agreed to include as many patients as they could during this period. All adult patients undergoing inpatient scheduled or urgent surgery are eligible. The study is solely observational and does not interfere with the patient's care. Preoperative assessment will consist on collecting demographic data (age, sex, body mass index, type of surgery) as well as the presence preoperative chronic pain and its localization, preoperative opioid, gabapentin or pregabalin consumption. In postoperative, we will collect the following data: type of anesthesia, intra operative ketamine administration, type and total dose of opioid administered during surgery. Pain will be evaluated at least 2 hours after the surgery within the same day (D0) and then at day 2 (D2), 1 (M1) and 2 months (M2) after the surgery. Pain will be assessed using a 10-point NPS. If NPS >0, neuropathic pain will be diagnosed on the basis of DN4 questionnaire. NCPSP is defined by NPS >0 and positive DN4 (DN4 ≥ 4 /10) (11). APSNP and CPSNP are defined by D0/D2 DN4≥ 4/10 and M1/M2 DN4≥ 4/10, respectively. The preoperative and immediate postoperative (day 0 and day 2) data will be collected by one investigator in each center. The latter data (1 and 2 months after the surgery) will be assessed over the phone by research nurses.

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.
800

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

  • France
      • Rennes, France
        • CHU de Rennes

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 and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

All adult patients undergoing inpatient scheduled or urgent surgery are eligible

Description

Inclusion Criteria:

  • All adult patients undergoing inpatient scheduled or urgent surgery

Exclusion Criteria:

  • < 18 years old

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

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
Time Frame
prospectively describe the incidence of APSNP in a large population using the DN4 questionnaire
Time Frame: 2 months
2 months

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.
Rennes University Hospital

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Hélène BELOEIL, Rennes University Hospital

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

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.
January 1, 2015

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.
December 1, 2015

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.
June 1, 2016

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).
July 5, 2016

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.
July 5, 2016

First Posted (Estimate)

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.
July 7, 2016

Study Record Updates

Last Update Posted (Estimate)

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 11, 2016

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 7, 2016

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, 2016

More Information

Terms related to this study

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.
  • 14.02

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

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