Clinical Trial of the Safety and Efficacy of Peripheral Nerve Stimulation in the Treatment of Postherpetic Neuralgia.

Neuropathic Pain Clinical Trial

Official title:

Prospective, Multicentre, Randomised Withdrawal Design of a Clinical Trial Evaluating the Safety and Efficacy of a Percutaneous Peripheral Nerve Stimulation System for Patients With Postherpetic Neuralgia.

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT06290661
• Other study ID #: UHCT-IEC-SOP-016-03-01
• Status: Recruiting
• Phase: N/A
• Start date: February 9, 2023
• Est. completion date: June 30, 2025

Study information

• Verified date: January 2024
• Source: Wuhan Union Hospital, China
• Contact: Dong Yang, PHD
• Phone: 13871230491
• Email: dongyang118[@]sina.com
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The goal of this clinical trial is to evaluate safety and efficacy of percutaneous peripheral nerve stimulation in patients with postherpetic neuralgia. The main questions it aims to answer are:

1. The efficacy of percutaneous peripheral nerve stimulation in patients with postherpetic neuralgia

2. The safety of percutaneous peripheral nerve stimulation in patients with postherpetic neuralgia Participants are going to undergo procedure that implant peripheral nerve stimulation electrode produced by Jiangsu CED Medtech Co., Ltd. Then the subjects, whose VAS scores decrease more 30% than baseline level, are classified into two groups randomly. One of the group receiving active stimulation called trial group and another receiving placebo stimulation called control group. All subjects are required to make their own subjects' pain diary to record VSA score before and after implantation until at the end of follow-up. Also, participants are asked to report use of analgesic medications, number of awakenings and adverse events.

Researchers will compare pain scores between the two groups to see if peripheral nerve stimulation is effective to patients with postherpetic neuralgia.

Description:

The investigators divide study process into 3 main periods called enrollment/baseline period, treatment period and follow-up period. The treatment period is classified into test period, randomized withdrawal period and observation period further.

1. Enrollment/baseline period This study will be conducted at four clinical trial sites in China with 3 to 6 subjects included in the pretest and the formal trial planned to enroll 56 subjects. All subjects enter screening process after signing the informed consent form (ICF) approved by the ethics committee. Subjects are enrolled who meet inclusion criteria and do not meet any exclusion criteria. Enrolled subjects will undergo vital signs, physical examination, laboratory tests, and visual analogue scale (VAS) scores for pain for at least 4 days, Neuropathic Pain Scale (DN4), and the Short Form Health Survey (SF-36) as part of the screening period assessment prior to electrode implantation.

2. Treatment period 2.1 Implantation of devices Enrolled subjects are implanted with the percutaneous peripheral nerve stimulation system, which was parameterized by the investigator via a programmable controller. Subjects are provided with a "Transcutaneous Peripheral Nerve Stimulation Remote Control Instruction Manual" to guide them in the proper operation and use of the system.

2.2 Test period Investigators will adjust stimulation parameters and record VAS score under different parameters conditions. The enrolled subjects are provided 1 to 5 stimulation therapy patterns parameterized by investigators after the test.

Then the subjects receive continuous stimulation with parameterized patterns of 7 (±3) days and VAS scores are be recorded every day of 7 days. Subjects will enter next stage if their VAS scores decrease more than 30% from baseline level or withdraw the trial as reduction less than 30% and devices are removed.

2.3 Randomized withdrawal period Subject will be classified into random group. One of the group receiving active stimulation called trial group and another receiving placebo stimulation called control group. Both of two groups are performed stimulation in the next 7 days. The subjects of control group will get active stimulation again as the VAS scores back to and maintain 2 days at baseline level. VAS scores will be recorded every day during this period.

2.4 Observation period The devices are on work until 28th day after the implantation in trial group; stimulators are turned on after randomized withdrawal period until 28th day after the implantation in control group.

All subjects have electrode leads removed on day 28 of implantation or at early withdrawal.

3. Follow-up period Investigators will begin follow up as the removal of electrode leads or on the day 28 of implantation. Indicators including VAS score will be evaluated and recorded to assess the efficacy and safety of percutaneous peripheral nerve stimulation during follow-up.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 60
• Est. completion date: June 30, 2025
• Est. primary completion date: December 31, 2024
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion criteria:

• 18 years old and above, male or female

• Diagnosed by trained clinical doctors as postherpetic neuralgia, which is an indication for peripheral nerve stimulation therapy;

• Assess the damage or disease of the peripheral sensory system through the four questions of Douleur Neuropathy before surgery;

• The subject has received conventional treatment but the efficacy is poor, or cannot tolerate the side effects of conventional treatment;

• Visual analogue scale for pain within 24 hours before surgery = 5;

• The subjects are able to understand the purpose of this study, have sufficient compliance with the research treatment, and are willing to sign an informed consent form;

Exclusion criteria:

• Subjects who need to receive both radio frequency modulation and intrathecal drug infusion treatment simultaneously;

• Subjects who are known to have cardiac implants (pacemakers or defibrillators) or other implantable neural stimulators (spinal cord stimulators or deep brain stimulators, etc.);

• Subjects with severe psychological and/or mental disorders and/or non therapeutic drug dependence;

• Subjects expected to undergo MRI examination within 30 days after PNS implantation;

• Expected to be discharged within 48 hours or less;

• Target nerve damage or muscle defects in known pain areas;

• Subjects who are known to be allergic to skin contact materials (tape or adhesive);

• Allergy to anesthetics such as lidocaine;

• Concomitant severe heart disease, liver disease, kidney disease, respiratory system disease, and coagulation dysfunction;

• Pregnant women, lactating women, or women planning to have children within the next three months;

• Subjects who have participated in any other clinical trial, or who may participate in any other trial after enrollment;

• Other situations that the researcher deems unsuitable for participation in this clinical trial

Related Conditions & MeSH terms

• Neuralgia
• Neuralgia, Postherpetic
• Neuropathic Pain
• Postherpetic Neuralgia

Intervention

Device:
• Active electrostimulation
Maintain the electrical stimulation state, and according to the patient's feeling to set the appropriate stimulation parameter range (pain relief and no obvious numbness and discomfort), the programme will be written into the patient's self-control remote control, by the patient according to their own pain situation for the independent control of the stimulation current.
• Placebo electrostimulation
No actual electrostimulation

Locations

Country	Name	City	State
China	Union Hospital, Tongji medical college, Huazhong University of Science and Technology	Wuhan	Hubei

Sponsors (4)

Lead Sponsor	Collaborator
Wuhan Union Hospital, China	The Second People's Hospital of GuangDong Province, Xiamen Hospital of Traditional Chinese Medicine, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine

Country where clinical trial is conducted

China, 

References & Publications (5)

Al-Jehani H, Jacques L. Peripheral nerve stimulation for chronic neurogenic pain. Prog Neurol Surg. 2011;24:27-40. doi: 10.1159/000323017. Epub 2011 Mar 21. — View Citation

Gilmore C, Ilfeld B, Rosenow J, Li S, Desai M, Hunter C, Rauck R, Kapural L, Nader A, Mak J, Cohen S, Crosby N, Boggs J. Percutaneous peripheral nerve stimulation for the treatment of chronic neuropathic postamputation pain: a multicenter, randomized, pla — View Citation

Mobbs RJ, Nair S, Blum P. Peripheral nerve stimulation for the treatment of chronic pain. J Clin Neurosci. 2007 Mar;14(3):216-21; discussion 222-3. doi: 10.1016/j.jocn.2005.11.007. — View Citation

Slavin KV. Peripheral nerve stimulation for neuropathic pain. Neurotherapeutics. 2008 Jan;5(1):100-6. doi: 10.1016/j.nurt.2007.11.005. — View Citation

Weiner RL, Reed KL. Peripheral neurostimulation for control of intractable occipital neuralgia. Neuromodulation. 1999 Jul;2(3):217-21. doi: 10.1046/j.1525-1403.1999.00217.x. — View Citation

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Difference in mean pain visual analogue scale VAS scores between trial and control groups in the randomised withdrawal period	Researchers will collect visual analogue scale scores of 7 days after the implantation of peripheral nerve stimulation electrode to calculate mean scores of 4 days before randomized withdrawal and evaluate the difference in pain improvement of peripheral nerve stimulation between the two groups (trial and control group) by analyzing the mean change in VAS scores during randomized withdrawal period.	every day from 7 to 14 days after electrode implantation (randomized withdrawal period)
Primary	Visual simulation assessment scale collects pain scores after peripheral electrode placement	Researchers collected daily pain scores from the day of peripheral nerve stimulation electrode implantation until removal using the VAS pain scale, as well as pain scores on the 14th day after electrode removal.	Every day from 7 to 28 days after electrode implantation, as well as the 14th day after electrode removal
Secondary	Proportion of subjects whose pain relief more than 30%	The VAS scores recorded in pain diary by participants during randomized withdrawal period decreased more 30% than baseline period.	Every day for 7 days after electrode implantation (test period)
Secondary	Proportion of subjects of ideal pain state	The VAS scores recorded in pain diary by participants during test period, randomized withdrawal period and observation period less than forty millimeters.	Every day for 7 days after electrode implantation (test period), every day from 7 to 14 days after electrode implantation (randomized withdrawal period), and every day from 14 to 28 days after electrode implantation (observation period)
Secondary	Sleep-related assessment after electrostimulation	The number of awakenings in sleep diary by participants during test period, randomized withdrawal period and observation period.	Every day for 7 days after electrode implantation (test period), every day from 7 to 14 days after electrode implantation (randomized withdrawal period), and every day from 14 to 28 days after electrode implantation (observation period)
Secondary	Change of life quality after electrostimulation	The subjects will be asked to fulfill the Mos 36-item Short Form Health Survey with assistance of clinical physician.	4 days before electrode implantation, 7, 14, 21, 28 days after electrode implantation, and 14 days after electrode removal.
Secondary	Analgesic medications	Participants themselves record the analgesic medications of name, dosage, numbers, routine and duration after peripheral nerve stimulation.	Every day from 4 days before electrode implantation to 14 days after electrode removal.
Secondary	Stability of external assistant devices	The stability is assessed with failure rate which defined as number of failures divided by total number of uses.	Every day from the 1st to 28th day after electrode implantation, as well as the 14th day after electrode removal.
Secondary	Questionnaire survey equipment satisfaction	A questionnaire survey (0-10 points, 0 points very dissatisfied, 10 points very satisfied) was conducted for each surgeon on the ease of operation of the product and the reasons for dissatisfaction were recorded; a questionnaire survey (0-10 points, 0 points very dissatisfied, 10 points very satisfied) was conducted for each subject on the comfort and ease of use of the equipment and the reasons for dissatisfaction were recorded.	On the first day of electrode implantation and the day of electrode removal (remove the electrode 28 days after surgery).