- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04234984
Patients With Chronic Knee Pain Treated With Conventional Radiofrequency of the Genicular Nerves (RECORGEN)
A Retrospective Single-center Cohort Study on Patients With Chronic Knee Pain Treated With Conventional Radiofrequency of the Genicular Nerves
Management of chronic knee pain remains a challenge to the treating physician. A radiofrequency treatment of the genicular nerves is a not yet established but promising technique. This procedure is minimal invasive and has few adverse events. For these reasons it can be advantageous and fulfilling the unmet needs of these chronic knee pain patients warranting further research of its efficacy.
To investigate this efficacy, all patients treated with radiofrequency ablation in the multidisciplinary chronic pain center between 1 September 2017 and 31 December 2019 with exclusion of patients with chronic widespread pain, will be retrospectively analyzed in a single-center cohort.
Study Overview
Status
Conditions
Detailed Description
This project has as primary objective the evaluation of treatment success of a conventional radiofrequency treatment of the genicular nerves in patients diagnosed with chronic knee pain due to osteoarthritis of the knee or persistent post-surgical pain (PPSP) at six weeks post treatment. Secondary objectives are evaluation of treatment effect at a third time point at the end of the inclusion period, subgroup analysis of treatment success based on indication to treatment, evaluation of subjective functional improvement and change in analgesics, estimation of the duration of effect of the treatment and adverse events.
This study includes all patients treated with radiofrequency ablation in the multidisciplinary chronic pain center in Ziekenhuis Oost-Limburg, Campus Sint-Barbara between 1 September 2017 and 31 December 2019 with exclusion of patients with chronic widespread pain.
The main study outcome is the proportion of patients with a global perceived effect of at least 50% at 6 weeks post intervention. Secondary outcomes include reduction in pain intensity, measured by Numeric Rating Scale (NRS) at six weeks and at a third time point, global perceived effect at a third time point, subjective change in physical functioning, duration effect of the treatment, use of strong opioids, and adverse events.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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Genk, Belgium, 3600
- Ziekenhuis Oost-Limburg
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- All patients with chronic knee pain who qualify for a conventional RF treatment of the genicular nerves
Exclusion Criteria:
- A negative diagnostic block with lidocaine 2% 1 ml of the three genicular nerves defined as less than 50% pain reduction
- Chronic widespread pain
Study Plan
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Retrospective
Cohorts and Interventions
Group / Cohort |
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Conventional radiofrequency (RF) treatment
All patients with chronic knee pain who qualify for a conventional RF treatment of the genicular nerves
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
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The Number of Patients Reaching Treatment Succes at 6 Weeks Defined as Global Perceived Effect (GPE) of ≥ 50% Compared to Baseline.
Time Frame: 6 weeks after treatment
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Treatment success is defined as a global perceived effect (GPE) of at least 50% at measurement time point compared to baseline. Global perceived effect (GPE) scales are used as an overall outcome measure for patients with pain, as they may cover additional aspects to pain relief and physical function that are important to the individual. Patients are asked to response on the question of how the treatment influenced the pain symptoms. The patients were asked to expres their answer in percentage where 0 % ( no improvement) to 100 (total improvement, the symptoms are gone). |
6 weeks after treatment
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
The Number of Participants With NRS Reduction ≥50% Compared to Baseline
Time Frame: 6 weeks after treatment
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The numeric rating scale (NRS) is used to assess pain intensity varying from 0 (no pain) to 10 (intense pain). This scale was retrieved retrospectively out of the patient file. NRS reduction ≥50% is calculated using the NRS at 6 weeks compared to the NRS at baseline. |
6 weeks after treatment
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The Patient's NRS
Time Frame: after retrieval of informed consent, ranging from 6 weeks to 2.5 years after the procedure
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The numeric rating scale (NRS) is used to assess pain intensity varying from 0 (no pain) to 10 (intense pain).
This scale will be asked telephonically to the patient.
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after retrieval of informed consent, ranging from 6 weeks to 2.5 years after the procedure
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The Number of Patients With Subjective Increase in Physical Functioning at the Second Time Point
Time Frame: after retrieval of informed consent, ranging from 6 weeks to 2.5 years after the procedure
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The question 'Do you experience at the moment functional improvement in comparison with before the treatment?' is asked telephonically to the patient.
The possible answers are 'no increase in physical functioning' and ' yes, there was an increase in physical funcitoning'.
An increase in physical functioning is the best outcome.
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after retrieval of informed consent, ranging from 6 weeks to 2.5 years after the procedure
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The Number of Pariticipants Using Strong Opioids
Time Frame: 6 weeks after treatment
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The change in use of strong opioids is retrieved retrospectively out of the patient file.
The answer to the use of strong opioids is yes or no.
No use of strong opioids is a better outcome.
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6 weeks after treatment
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Strong Opioid Use at the Second Time Point
Time Frame: after retrieval of informed consent, ranging from 6 weeks to 2.5 years after the procedure
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The change in use of strong opioids is asked telephonically to the patient.
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after retrieval of informed consent, ranging from 6 weeks to 2.5 years after the procedure
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The Number of Participants Reaching Treatment Success After Retrieval of the Informed Consent Defined as GPE of ≥ 50% Compared to Baseline.
Time Frame: after retrieval of informed consent, ranging from 6 weeks to 2.5 years after the procedure
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Treatment success is defined as a global perceived effect (GPE) of at least 50% at measurement time point compared to baseline. Global perceived effect (GPE) scales are used as an overall outcome measure for patients with pain, as they may cover additional aspects to pain relief and physical function that are important to the individual. Patients are asked to response on the question of how the treatment influenced the pain symptoms. The patients were asked to expres their answer in percentage where 0 % ( no improvement) to 100 (total improvement, the symptoms are gone). |
after retrieval of informed consent, ranging from 6 weeks to 2.5 years after the procedure
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Number of Participants With Post-treatment Complications
Time Frame: 6 weeks after treatment.
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Adverse events related to the conventional radiofrequency therapy will be assessed.
This will be assessed retrospectively in the patient file according to the standard of care consultation at 6 weeks after treatment.
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6 weeks after treatment.
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Number of Participants With Post-treatment Complications
Time Frame: after retrieval of informed consent, ranging from 6 weeks to 2.5 years after the procedure
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Adverse events related to the conventional radiofrequency therapy will be assessed telephonically
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after retrieval of informed consent, ranging from 6 weeks to 2.5 years after the procedure
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Jan Van Zundert, MD PhD, Ziekenhuis Oost-Limburg
Publications and helpful links
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- RECORGEN
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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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