NeuralgiaNCT05563636
High Voltage VS Standard Voltage Radiofrequency in a Patient With Failed Back Surgery Syndrome
A study testing standard pulsed radio frequency (PRF) and high-voltage long-term pulsed radio frequency (PRF) in people with Neuralgia and Failed Back Surgery Syndrome, run by Assiut University at 1 site in Egypt.
Trial summary
Postoperative lumbar spine pain syndrome (FBSS) refers to patients who have undergone surgery for lumbar spine disease one or more times and still have intractable lumbosacral pain after surgery, with or without lower limb sensory and motor dysfunction. Pain is the main reason for reducing patients' quality of life. Read more about this study
- Who is it for?
- Ages 20 to 60 years
- Conditions the study is for
- Neuralgia, Failed Back Surgery Syndrome
- What is being tested?
- standard pulsed radio frequency (PRF) and high-voltage long-term pulsed radio frequency (PRF)
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 90 participants
- Where
- 1 siteEgypt
- Study dates
- 1 Dec 2022to 1 Dec 2024
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 20 to 60 years
- All sexes
- No healthy volunteers
- Adult
Who may be able to join
- Patients who have a history of lumbar spine surgery without instrumentation. , have clear symptoms of lumbar nerve root irritation, and unilateral lower extremity symptoms, and the straight leg raising test is positive
Who cannot join
- Mechanical compression to nerve root
- Spondylolisthesis, retrolithesis
- Spondylodiscitis
- Lumbar canal stenosis
- Inflammatory low back pain
- Coagulopathy
Show all 9Show fewer
- Local anesthetic allergy
- Infection at the site of injection
- Systemic infection
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Efficacy of High Voltage VS Standard Voltage Radiofrequency on Unilateral Lower Limb Neuralgia in a Patient With Failed Back Surgery Syndrome
Postoperative lumbar spine pain syndrome (FBSS) refers to patients who have undergone surgery for lumbar spine disease one or more times and still have intractable lumbosacral pain after surgery, with or without lower limb sensory and motor dysfunction. Pain is the main reason for reducing patients' quality of life. Hussain and Erdek believe that despite up to 3 months of postoperative intervention, pain may still exist. Since persistent pain seriously affects patients' daily life and work, optimizing the FBSS treatment plan and improving the quality of life of FBSS patients cannot be ignored. At present, the treatment methods for neuropathic pain radiated to the lower extremity after lumbar spine surgery mainly include oral drug therapy, nerve block, pulsed radio frequency (PRF) and spinal cord electrical stimulation, and other minimally invasive interventional methods. Still, there is no domestic or foreign treatment method is reported in the literature to be effective.
Read the detailed description
Selective nerve root PRF is an effective method for treating neuropathic pain, but its analgesic mechanism is still unclear. The traditional PRF adopts the standard 42 ℃ mode, but due to its low voltage (40 V), short duration (120 s), and limited intensity of action, the patient cannot get the best therapeutic effect. In recent years, high-voltage long-term PRF has been gradually applied to treating neuropathic pain such as postherpetic neuralgia, trigeminal neuralgia, and glossopharyngeal neuralgia, and achieved ideal results.
. Selective spinal nerve puncture under ultrasound and X-ray guidance: After the patient enters the operating room, the venous access is inserted, and the patient is placed in a prone position. ECG monitoring is given, and the patient's vital signs are continuously monitored. Routine sterilization and laying of sheets, puncture with an 20 G radiofrequency puncture needle under the guidance of ultrasound, repeated X-rays to confirm the position of the needle tip, when the needle tip reaches the target position, the X-ray front view will show that the needle tip of the puncture needle is located below the pedicle, and the lateral view shows The tip of the puncture needle is located at the posterior 1/2of the intervertebral foramen, then connect the radiofrequency treatment apparatus, perform sensory and motor tests, and perform sensory tests The pain in the corresponding innervated area is reproduced within 0.5 V and 50 Hz, and is consistent with the patient's original pain location; if >0.5 V does not induce pain in the original pain area, fine-tune the needle tip position and then perform the sensory test until 0.1 The needle tip position can be fixed when the patient's original pain can be induced within ~0.5 V. In the exercise test, muscle beats in the corresponding area were induced within 1.0 V and 2 Hz. After the test was successful, 1 ml of contrast agent will be injected, and the X-ray should show that the contrast agent spread along the nerve root and epidural space.
- Conditions
- Neuralgia, Failed Back Surgery Syndrome
- Being tested
- standard pulsed radio frequency (PRF), high-voltage long-term pulsed radio frequency (PRF)
- Medical subject headings
- Neuralgia, Failed Back Surgery Syndrome
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
standard pulsed radio frequency (PRF)Device
Also called control group
patients will be given standard pulsed radiofrequency (PRF) treatment: temperature 42 ℃, frequency 2 Hz, pulse width 20 ms, voltage 37-41 V, time 120 s.
high-voltage long-term pulsed radio frequency (PRF)Device
patients will be given standard pulsed radiofrequency (PRF) treatment: temperature 42 ℃, frequency 2 Hz, pulse width 20 ms, voltage 50-90 V, At the beginning, the patient will feel a severe burning sensation in the original pain area, and slowly after the patient tolerates it. Increase the voltage and gradually increase to the maximum voltage that the patient can tolerate (up to 70-90 V) until the end of 900 s.
| Study group | Role | What they receive |
|---|---|---|
| control (group S) | Other | patients will be given standard PRF treatment: temperature 42 ℃, frequency 2 Hz, pulse width 20 ms, voltage 37-41 V, time 120 s. Receives: Device: standard pulsed radio frequency (PRF) |
| group H | Experimental | patients will be given high-voltage long-term PRF treatment: temperature 42 ℃, frequency 2 Hz, pulse width 20 ms, the voltage range of 50-90 V, At the beginning, the patient will feel a severe burning sensation in the original pain area, and slowly after the patient tolerates it. Increase the voltage and gradually increase to the maximum voltage that the patient can tolerate (up to 70-90 V) until the end of 900 s. Receives: Device: high-voltage long-term pulsed radio frequency (PRF) |
What is being measured
The primary outcome is the main question the study is designed to answer.
change in Oswestry Disability Index (ODI)
assessing a change in Oswestry Disability Index (ODI)
Measured: assessing a change in Change ODI from Baseline at 6 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted3 Oct 2022
- Study start1 Dec 2022
- Primary completion1 Dec 2024
- Study completion1 Dec 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for NeuralgiaStudies of the same condition, open and under way.
- More trials run by Assiut UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 90 participants (actual)
Sponsor and investigators
- Lead sponsor
- Assiut University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Amani Hassan Abdel-Wahab, Assiut University
- Investigators
- Amani H Abdel-wahab, MD, Principal investigator, Assiut University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05563636
- Sponsor's protocol ID
- AssiutU_HAA_RFA
- Status last verified
- Dec 2024
- First submitted
- 28 Sep 2022
- Last updated
- 1 Jan 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 1 Jan 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Efficacy of High Voltage VS Standard Voltage Radiofrequency on Unilateral Lower Limb Neuralgia in a Patient With Failed Back Surgery Syndrome
- ClinicalTrials.gov ID
- NCT05563636
- Acronym / sponsor ID
- AssiutU_HAA_RFA
- Conditions
- Neuralgia, Failed Back Surgery Syndrome
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 90 participants (actual)
- Lead sponsor
- Assiut UniversityUniversity, hospital or other
- Study start
- 1 Dec 2022 (actual)
- Primary completion
- 1 Dec 2024 (actual)
- Study completion
- 1 Dec 2024 (actual)
- First posted
- 3 Oct 2022 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Postoperative lumbar spine pain syndrome (FBSS) refers to patients who have undergone surgery for lumbar spine disease one or more times and still have intractable lumbosacral pain after surgery, with or without lower limb sensory and motor dysfunction. Pain is the main reason for reducing patients' quality of life. Hussain and Erdek believe that despite up to 3 months of postoperative intervention, pain may still exist. Since persistent pain seriously affects patients' daily life and work, optimizing the FBSS treatment plan and improving the quality of life of FBSS patients cannot be ignored. At present, the treatment methods for neuropathic pain radiated to the lower extremity after lumbar spine surgery mainly include oral drug therapy, nerve block, pulsed radio frequency (PRF) and spinal cord electrical stimulation, and other minimally invasive interventional methods. Still, there is no domestic or foreign treatment method is reported in the literature to be effective.
Detailed description
Selective nerve root PRF is an effective method for treating neuropathic pain, but its analgesic mechanism is still unclear. The traditional PRF adopts the standard 42 ℃ mode, but due to its low voltage (40 V), short duration (120 s), and limited intensity of action, the patient cannot get the best therapeutic effect. In recent years, high-voltage long-term PRF has been gradually applied to treating neuropathic pain such as postherpetic neuralgia, trigeminal neuralgia, and glossopharyngeal neuralgia, and achieved ideal results.
. Selective spinal nerve puncture under ultrasound and X-ray guidance: After the patient enters the operating room, the venous access is inserted, and the patient is placed in a prone position. ECG monitoring is given, and the patient's vital signs are continuously monitored. Routine sterilization and laying of sheets, puncture with an 20 G radiofrequency puncture needle under the guidance of ultrasound, repeated X-rays to confirm the position of the needle tip, when the needle tip reaches the target position, the X-ray front view will show that the needle tip of the puncture needle is located below the pedicle, and the lateral view shows The tip of the puncture needle is located at the posterior 1/2of the intervertebral foramen, then connect the radiofrequency treatment apparatus, perform sensory and motor tests, and perform sensory tests The pain in the corresponding innervated area is reproduced within 0.5 V and 50 Hz, and is consistent with the patient's original pain location; if >0.5 V does not induce pain in the original pain area, fine-tune the needle tip position and then perform the sensory test until 0.1 The needle tip position can be fixed when the patient's original pain can be induced within ~0.5 V. In the exercise test, muscle beats in the corresponding area were induced within 1.0 V and 2 Hz. After the test was successful, 1 ml of contrast agent will be injected, and the X-ray should show that the contrast agent spread along the nerve root and epidural space.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| control (group S) | Other | Device: standard pulsed radio frequency (PRF)patients will be given standard PRF treatment: temperature 42 ℃, frequency 2 Hz, pulse width 20 ms, voltage 37-41 V, time 120 s. |
| group H | Experimental | Device: high-voltage long-term pulsed radio frequency (PRF)patients will be given high-voltage long-term PRF treatment: temperature 42 ℃, frequency 2 Hz, pulse width 20 ms, the voltage range of 50-90 V, At the beginning, the patient will feel a severe burning sensation in the original pain area, and slowly after the patient tolerates it. Increase the voltage and gradually increase to the maximum voltage that the patient can tolerate (up to 70-90 V) until the end of 900 s. |
Who may qualify
- Ages
- 20 to 60 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (1 listed)
- Patients who have a history of lumbar spine surgery without instrumentation. , have clear symptoms of lumbar nerve root irritation, and unilateral lower extremity symptoms, and the straight leg raising test is positive
Key exclusion criteria (9 listed)
- Mechanical compression to nerve root
- Spondylolisthesis, retrolithesis
- Spondylodiscitis
- Lumbar canal stenosis
- Inflammatory low back pain
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| standard pulsed radio frequency (PRF)Also: control grouppatients will be given standard pulsed radiofrequency (PRF) treatment: temperature 42 ℃, frequency 2 Hz, pulse width 20 ms, voltage 37-41 V, time 120 s. | Device | control (group S) |
| high-voltage long-term pulsed radio frequency (PRF)patients will be given standard pulsed radiofrequency (PRF) treatment: temperature 42 ℃, frequency 2 Hz, pulse width 20 ms, voltage 50-90 V, At the beginning, the patient will feel a severe burning sensation in the original pain area, and slowly after the patient tolerates it. Increase the voltage and gradually increase to the maximum voltage that the patient can tolerate (up to 70-90 V) until the end of 900 s. | Device | group H |
Primary outcome
change in Oswestry Disability Index (ODI)
Time frame: assessing a change in Change ODI from Baseline at 6 months
assessing a change in Oswestry Disability Index (ODI)
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 1 Jan 2025.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Amani H Abdel-wahab, MD principal investigator
Assiut University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing standard pulsed radio frequency (PRF) and high-voltage long-term pulsed radio frequency (PRF) in people with Neuralgia and Failed Back Surgery Syndrome, run by Assiut University at 1 site in Egypt.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 1 Jan 2025. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Egypt. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
change in Oswestry Disability Index (ODI) (time frame: assessing a change in Change ODI from Baseline at 6 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 1 Jan 2025.