Psychophysical and Functional Outcomes in Chemotherapy-induced Peripheral Neuropathy After Spinal Cord Stimulation: A Narrative Review and Case Series.

OBJECTIVES: Chemotherapy-induced peripheral neuropathy (CIPN) is a complication that may occur after treatment with various anticancer drugs. In refractory CIPN cases, spinal cord stimulation (SCS) has garnered increased attention. The use of gait analysis and psychophysical quantitative sensory testing (QST) as an objective measurement of CIPN-related damage has burgeoned; however, these changes have not been reported for patients with CIPN after SCS implantation using either burst or tonic stimulation. MATERIALS AND METHODS: This manuscript encompasses two parts: 1) a presentation of pain improvement in a series of patients who underwent tonic vs burst SCS for CIPN measured by gait and QST analysis and 2) a narrative review on gait and psychophysical QST outcomes between burst and tonic SCS stimulation pertaining to pain and the extrapolation to CIPN-related sequalae. RESULTS: In these cases, gait scores improved in both patients. Touch thresholds were higher before SCS whereas skin temperatures were lower at the dorsal foot, subtalus, and posterior calf. Sharpness detection was drastically improved after SCS. In the review, the patients aligned with pain relief, suggesting good response to interventional outcomes with SCS. QST outcomes, particularly touch, sharpness, heat, and cold stimuli, however, were not fully corroborated. Similarly to other non-CIPN SCS gait studies, both tonic and burst studies provided positive outcomes on spatiotemporal gait parameters, gait form, and standardized gait scales. CONCLUSION: We emphasize the use of different SCS waveforms as a therapy for CIPN management and the use of psychophysical testing as a measure for diagnosis and monitoring CIPN's progress in our case series and review.

Device-Related Complications Associated with Cylindrical Lead Spinal Cord Stimulator Implants: A Comprehensive Review.

PURPOSE OF REVIEW: Spinal cord stimulation (SCS) is an increasingly utilized therapy for the treatment of neuropathic pain conditions. Though minimally invasive and reversable, there are several important device-related complications that physicians should be aware of before offering this therapy to patients. The aim of this review is to synthesize recent studies in device-related SCS complications pertaining to cylindrical lead implantation and to discuss etiologies, symptoms and presentations, diagnostic evaluation, clinical implications, and treatment options. RECENT FINDINGS: Device-related complications are more common than biologic complications. Device-related complications covered in this review include lead migration, lead fracture, lead disconnection, generator failure, loss of charge, generator flipping, hardware related pain, and paresthesia intolerance. The use of SCS continues to be an effective option for neuropathic pain conditions. Consideration of complications prior to moving forward with SCS trials and implantation is a vital part of patient management and device selection. Knowledge of these complications can provide physicians and other healthcare professionals the ability to maximize patient outcomes.

Septic arthritis of the cervical facet joint: Clinical report and review of the literature.

BACKGROUND: Facet joint septic arthritis (FJSA) is an uncommon cause of neck pain, most frequently occurring in the lumbosacral spine. Cervical facet joint septic arthritis is particularly rare. Symptoms typically include spinal or paraspinal pain and tenderness, with severe infections potentially causing neurological impairments. This condition can progress to discitis and osteomyelitis. High clinical suspicion is required for accurate diagnosis and timely treatment. OBJECTIVE: To present the first known case of cervical spine FJSA caused by Moraxella species and provide an updated narrative review of cervical spine FJSA. METHODS: A case study of a 66-year-old male with cervical spine FJSA caused by Moraxella osloensis is detailed. Additionally, a librarian-assisted literature search was conducted on MEDLINE Pubmed, filtering for adult human trials and including various study types, resulting in the inclusion of 9 relevant manuscripts. RESULTS: The patient's symptoms included neck, right upper thoracic, and periscapular pain, with episodes of numbness and tingling. MRI revealed septic arthritis at the C7-T1 facet joint and associated osteomyelitis. Cultures identified Moraxella osloensis as the causative agent. The patient was successfully treated with antibiotics and experienced significant symptom improvement. Literature review highlights that Staphylococcus aureus is the most common causative agent of cervical FJSA, with diagnosis typically involving MRI and culture tests. Treatment generally includes long-term antibiotics, with some cases requiring surgical intervention. CONCLUSIONS: This report underscores the need for high clinical suspicion in diagnosing FJSA and highlights the importance of early intervention. It documents the first known case of cervical spine FJSA caused by Moraxella osloensis, contributing valuable information to the limited literature on this rare condition.

Peripheral Nerve Stimulation After Total Knee Arthroplasty and Non-Operable Patella Fracture.

Chronic knee pain, affecting over 25% of adults in the United States, has surged by 65% over the past two decades leading to rising functional deficits, mobility problems, and a diminished quality of life. While conservative management with pharmacologic and minimally invasive injections are pursued early in the disease process, total knee arthroplasty for refractory osteoarthritis of the knee is often considered. This procedure usually improves pain and functionality within the first three months. However, a significant portion of patients often suffer from postoperative pain that can become chronic and debilitating. We detail the case of a patient with a previous TKA as well as a non-operable patella fracture who obtained significant relief with PNS despite prior conservative and minimally invasive management.

Stimulating Superior Cluneal Nerves via Peripheral Nerve Stimulation as a Treatment for Chronic Low Back Pain.

Low back pain (LBP) is a challenging clinical condition for both patients and physicians. It requires a comprehensive initial diagnosis to avoid missing potential causes. One less common cause is superior cluneal neuralgia (SCN), which can present with limited lumbar motion, LBP, buttock pain, or an antalgic gait. While conservative therapies are often first line for LBP, neuromodulation, such as peripheral nerve stimulation (PNS), can be considered for more refractory cases. This case report is unique in that SCN was treated with a temporary PNS system, which provided sustained analgesic benefits without the need for permanent implantation.

Techniques in medicine: ipsilateral transforaminal epidural steroid injection in Bertolotti's syndrome.

Bertolotti's syndrome, also known as lumbosacral transitional vertebrae, is a relatively rare spinal condition characterized by an anatomical variation in the lower spine. Conservative approaches such as physical therapy, anti-inflammatory medications and lifestyle modifications may be recommended for mild cases. In more severe cases or when conservative measures fail to provide relief, injections such as may be considered to alleviate pain. This case is unique in that we document a challenging technique of ipsilateral transforaminal epidural steroid injection in a patient with Bertolotti's syndrome.

Epidural Catheters for Cervical Epidural Steroid Injections to Target Higher Cervical Pathology: Clinical Images in Practice.

Cervical radicular pain is commonly treated with cervical epidural steroid injections. The transforaminal approach allows for direct treatment of the steroid at a particular nerve root or level. Still, it carries a significant risk of morbidity and mortality with thromboembolism or injury to cervical vasculature. The interlaminar approach is commonly utilized as it avoids vascular structures. However, the epidural space becomes narrower at higher levels, limiting the ability to perform this approach at higher cervical levels. Cervical epidural catheters can be used and advanced to target higher cervical pathology through the interlaminar approach. We present clinical images demonstrating the utility of a cervical catheter for treating higher cervical levels.

Buprenorphine for Chronic Pain Management: a Narrative Review.

PURPOSE OF REVIEW: The aim of this review is to educate healthcare professionals regarding buprenorphine for the use of opioid use disorder (OUD) as well as for chronic pain management. This review provides physicians and practitioners with updated information regarding the distinct characteristics and intricacies of prescribing buprenorphine. RECENT FINDINGS: Buprenorphine is approved by the US Food and Drug Administration (FDA) for acute pain, chronic pain, opioid use disorder (OUD), and opioid dependence. When compared to most other opioids, buprenorphine offers superior patient tolerability, an excellent half-life, and minimal respiratory depression. Buprenorphine does have notable side effects as well as pharmacokinetic properties that require special attention, especially if patients require future surgical interventions. Many physicians are not trained to initiate or manage patients on buprenorphine. However, buprenorphine offers a potentially safer alternative for medication management for patients who require chronic opioid therapy for pain or have OUD. This review provides updated information on buprenorphine for both chronic pain and OUD.

Lancinating lumbar facet syndrome: a congenitally absent facet joint.

Congenitally absent or hypoplastic L5-S1 facet (zygapophyseal) joints are an aberrated rarity, with less than 30 reported cases. This absence of facet joint and contralateral hypertrophic facet provides a continuum of presentations that can complicate low back pain diagnoses and management. A broad differential including lumbar facet syndrome, disc degeneration, spinal stenosis, herniated radiculopathy, spondyloarthropathies and sacroiliac joint pain should be considered initially, with the flexibility for other diagnoses. Understanding the effects of different anatomical, biomechanical and physiological changes on spinal health is essential for patient care. We report a progression of lumbar radiculopathy complicated by the presence of a congenitally absent left L5-S1 facet joint and hypertrophic right L5-S1 facet joint. Furthermore, our discussion concentrates on pathophysiology, differential diagnoses and management of congenitally absent facet joints and the impact they can have on low back pain and spinal health.

Spontaneous pulmonary herniation in post-polio syndrome.

Pulmonary hernias are typically a result of trauma, thoracic operations, or congenital defects. Spontaneous lung hernias without a prior overt injury are notably rare. The presence of spontaneous lung hernias has not been reported in post-polio syndrome. Post-polio syndrome is a late sequela of poliomyelitis that usually presents 30-40 years after the initial illness with new presentations of progressive muscle weakness, abnormal muscle fatigue, muscle atrophy, and myalgia. This case report describes the presentation and imaging of a post-polio patient with an atraumatic, spontaneous lung hernia. A discussion on pulmonary hernias, diagnostic imaging, and management is also included.

"I Just Don't Feel Heard": A Case Study on Opioid Use Disorder and Pain Management.

The nation's opioid epidemic requires a paradigm shift in the way patients with co-occurring opioid use disorder are treated during episodes of acute pain. Patients are often introduced to prescription opioids after an extremity fracture or sprain or resulting from musculoskeletal back, abdominal, or dental pain. Opioid naive patients who receive their first opioid prescription on discharge from the emergency department may be more likely to develop chronic opioid use compared to patients receiving non-opioid pain medications. This case report will highlight one patient's journey including initial prescription opioid use, escalation into illicit opioids, entry to a recovery and treatment program, discussions with her physician about alternative therapies, and barriers to satisfactory pain relief. A shared decision-making model will be explored.

Shared Decision Making in Acute Pain Management in Patients with Opioid Use Disorder: A Scoping Review.

The treatment of acute pain over the years has changed with increasing alternative therapies and increased scrutiny of opioid prescriptions. Shared Decision Making (SDM) has become a vital tool in increasing patient engagement and satisfaction in treatment decisions. SDM has been successfully implemented in the management of pain in a variety of settings; however, information regarding the use of SDM for treating acute pain in patients with a history of opioid use disorder (OUD) remains scarce. Following the Preferred Reporting Items for Systematic Reviews and Meta-analysis Extension for Scoping Reviews (PRISMA-ScR), we conducted a review to understand how SDM is used in acute pain management in patients with OUD. We searched Medline, Embase, CINAHL, and PsychInfo databases for relevant articles. Articles were screened and SDM outcomes of eligible articles were charted. The results were grouped by sub-theme based on a 1997 SDM model. There were three original research studies and one quality improvement study. The remaining articles were split evenly between reviews and reviews of clinical guidelines. Four themes emerged from the review: prior judgment and stigma related to OUD, trust and sharing of information, clinical tools, and interprofessional teams. This scoping review consolidated and expounded the current literature on SDM in the management of acute pain in patients with OUD. More work is needed to address prior judgments by both providers and patients and to build greater dialogue. Clinical tools may aid this process as well as the involvement of a multidisciplinary team.

Photocrosslinking of glycoconjugates using metabolically incorporated diazirine-containing sugars.

Transient interactions among glycoconjugates underlie developmental, immunological and metastatic recognition. Glycan-mediated interactions have low binding affinities and rapid dissociation rates. As a result, these complexes dissociate when removed from their cellular context, complicating characterization. Photocrosslinkers introduce a covalent bond between glycoconjugates and their binding partners, allowing physiologically relevant complexes to be isolated. This protocol describes metabolic incorporation of a diazirine photocrosslinker into sialic acids in cellular glycoconjugates. Subsequent irradiation results in photocrosslinking of sialic acid to neighboring macromolecules, providing a photochemical 'snapshot' of binding events. As photocrosslinking sugars are light activated, these reagents have the potential to be used for temporally and/or spatially restricted crosslinking. We provide instructions for the synthesis of photocrosslinking sugar precursors, cell culture for metabolic incorporation, flow cytometry to evaluate metabolic incorporation, photoirradiation and analysis of the crosslinked complexes. Synthesis of photocrosslinking sugars requires 4-6 d, and photocrosslinking experiments can be completed in an additional 6 d.

Modular fluorescent benzobis(imidazolium) salts: syntheses, photophysical analyses, and applications.

A series of benzobis(imidazolium) (BBI) salts has been prepared and studied as a new class of versatile fluorescent materials. Using a high yielding, modular synthetic strategy, BBI salts with a range of functionality poised for investigating fundamental and applications-oriented characteristics, including emission wavelength tunability, solvatochromism, red-edge excitation, chemical stability, multiphoton excitation, and protein conjugation, were prepared in overall yields of 40-97%. Through structural variation, the BBIs exhibited lambda(em) ranging between 329 and 561 nm while displaying phi(f)s up to 0.91. In addition, the emission characteristics of these salts were found to exhibit strong solvent dependencies with Stokes shifts ranging from 4570 to 13 793 cm(-1), depending on the nature of the BBI core. Although red-edge effects for BBI salts with Br and BF4 counterions were found to be similar, unique characteristics were displayed by an analogue with MeSO4 anions. The stability of an amphiphilic BBI was quantified in aqueous solutions of varying pH, and >85% of the emission intensity was retained after 2 h at pH 3-9. Through multiphoton excitation experiments in aqueous solutions, a BBI salt was found to exhibit three-photon fluorescence action cross sections similar to serotonin. The application of BBI salts as fluorescent protein tags was demonstrated by conjugating bovine serum albumin to a maleimide-functionalized derivative.