Spinal cord stimulation for treatment of chronic neuropathic pain in adolescent patients: a single-institution series, systematic review, and individual participant data meta-analysis.

OBJECTIVE: Neuropathic pain is undertreated in children. Neurosurgical treatments of pediatric chronic pain are limited by the absence of both US Food and Drug Administration approval and pediatric-specific hardware, as well as weak referral patterns due to a lack of physician education. This study presents a single-institution retrospective case series of spinal cord stimulation (SCS) in children ≤ 19 years of age and a systematic review of SCS in children. The authors' findings may further validate the role of SCS as an effective treatment modality for varied neuropathic pain syndromes found in pediatric patients. METHODS: The study was a single-center, single-surgeon, retrospective case series of individuals treated between July 2017 and May 2022. The outcomes for pediatric patients with chronic neuropathic pain syndromes indicated by the multidisciplinary pain clinic for evaluation for SCS were cataloged. A systematic review and individual participant data (IPD) meta-analysis was performed for cases treated until May 2022, using PubMed, EMBASE, and Scopus to characterize outcomes of children with neuropathic pain treated with SCS. RESULTS: Twelve patients were evaluated and 9 were indicated for percutaneous or buried lead trials. Seven female and 2 male patients between the ages of 13 and 19 years were implanted with trial leads. Eight of 9 (89%) patients went on to receive permanent systems. The average trial length was 6 days, and the length of stay for both trial and implant was less than 1 day. Complication rates due to CSF leaks were 22% and 0% for trial and implant, respectively. Visual analog scale pain scores decreased from 9.2 to 2.9 (p = 0.0002) and the number of medications decreased from 4.9 to 2.1 (p = 0.0005). Functional status also improved for each patient. A systematic review identified 13 studies describing pediatric patients with SCS, including 12 providing IPD on 30 patients. In the IPD meta-analysis, pain was reduced in 16/16 (100%) of patients following surgery and in 25/26 (96.2%) at last follow-up. Medication use was decreased in 16/21 (76.2%), and functional outcomes were improved in 29/29 (100%). The complication rate was 5/30 (16.7%). CONCLUSIONS: SCS effectively decreases pain and medication use for pediatric neuropathic pain syndromes. Patients also report improved functional status, including improved matriculation, gainful employment, and physical activity. There is minimal high-quality literature describing neuromodulation for pain in children. Neuromodulation should be considered earlier as a viable alternative to escalating use of multiple drugs and as a potential mechanism to address tolerance, dependence, and addiction in pediatric patients.

Primary Erythromelalgia Treated With 10% Capsaicin Cream: A Case Report and a 10-Year Follow-Up.

In this case report, we describe the difficulty in finding a suitable treatment for a nine-year-old girl with erythromelalgia. Initially, she could only find pain relief through immersion of her hands and feet in buckets of cool water. Her pain did not respond to outpatient treatments, and she was ultimately admitted to the hospital for pain management. Many different medications and modalities were tried over the course of several weeks in the hospital. Finally, she received the most benefit from 10% compounded capsaicin cream administered under general anesthesia with regional analgesia for post-application pain. Over the course of several years, exacerbations of her pain were treated with additional applications of 10% capsaicin cream, with each application providing relief for an increased duration. Her severe pain flares eventually went into remission after several years. Today, after more than a decade following her initial presentation, she is a successful college student and is taking no medications for her erythromelalgia.

Demographics, Diagnoses, Drugs, and Adjuvants in Patients on Chronic Opioid Therapy vs. Intermittent Use in a Tertiary Pediatric Chronic Pain Clinic.

Anywhere from 11.6% to 20% of pediatric and adolescent patients treated for chronic pain are prescribed opioids, but little is known about these patients. The purpose of this study was to determine the characteristics of patients on chronic opioid therapy (COT) and what therapies had been utilized prior to or in conjunction with COT. The study was a retrospective chart review of all chronic pain patients seen during 2020 with those patients on COT separated for analysis. A total of 346 unique patients were seen of which 257 were female (74.3%). The average age was 15.5 years. A total of 48 patients (13.9%) were identified as being on COT with an average age of 18.1 years. Of these, 23 (47.9%) were male which was significantly more than expected. The most common reason for patients to be receiving COT was palliative (13/48), and the second most common was sickle cell anemia (10/48). Patients on COT were significantly more likely to be male, be older, and to be concurrently prescribed benzodiazepines. Concurrent opioid and benzodiazepine therapy is a risk factor for respiratory depression and overdose. Further investigation into the increased proportion of males and benzodiazepine usage in patients on COT is warranted.

Peer Support in the Treatment of Chronic Pain in Adolescents: A Review of the Literature and Available Resources.

Peer support has found applications beyond the mental health field and is useful for managing several chronic disorders and supporting healthy lifestyle choices. Communication through telephone and the Internet allows for greater access to those who cannot meet in person. Adolescent chronic pain would seem ideally suited to benefit from online peer support groups. Research is lacking, however, to characterize benefit in terms of pain and function, despite a clear desire among adolescents for access to such programs. More rapid development of online applications is needed for peer support, and research into the associated outcomes will be necessary to optimally design such programs.

Spinal Cord Stimulation Improves Functional Outcomes in Children With Complex Regional Pain Syndrome: Case Presentation and Review of the Literature.

BACKGROUND: In the pediatric population, complex regional pain syndrome (CRPS) is a debilitating chronic pain syndrome that is classically treated with escalating polypharmacy and physical therapy. Failure of therapy is often encountered in both adult and pediatric patients with CRPS, after which invasive neuromodulatory therapy might be considered. Intrathecal drug delivery systems and spinal cord stimulation (SCS) have been reported in the literature as forms of neuromodulation effective in adult CRPS; however, SCS remains inadequately researched and underreported in the pediatric CRPS population. Owing to the differences in patient population characteristics and the specific vulnerability of adolescents to drugs that might be used to manage refractory cases, including but not limited to opioids, we believe that early effective pain management without the use of chronic pain medications is of paramount importance. METHODS: Recent evidence suggests that neuromodulation can be useful toward improving function and managing pain, while also reducing medication use in chronic pain patients. A representative case a review of the literature is performed. RESULTS: We report the effective treatment of CRPS in a pediatric patient following implantation of an SCS device typifying the improved pain scores, decreased medication use, and substantially improved functional abilities in pediatric patients following SCS. CONCLUSIONS: The manuscript objective is to stimulate a discussion for SCS use earlier in the therapeutic management of CRPS in children.

Postoperative neuraxial pain relief in the pediatric patient.

Pain serves as a useful warning function of potential tissue damage. The systemic response to pain is characterized by activation of the sympathetic nervous system. The ensuing neuroendocrine response results in a myriad of adverse effects on the various organ systems, which can adversely affect surgical outcomes. When effective neuraxial anesthesia and analgesic techniques are employed, the surgical patient may benefit from decreases in morbidity, mortality, and prevention of subsequent development of chronic pain. The use of intrathecal and epidural techniques in the pediatric population is well established and allows these patients to benefit from superior pain relief and improved surgical outcomes.