Pain Practice最新文献

Objective: Occipital Nerve Stimulation (ONS) is increasingly used to treat a range of chronic, refractory headache conditions, most notably chronic cluster headache (CCH). Despite this, there is still no consensus on the optimal implantation technique. Clinical reports and reviews in the field have reported remarkably high complication rates of which several can be directly related to the surgical approach. We here describe a comprehensive and detailed surgical approach used at Aarhus University Hospital, Denmark, aiming to improve paresthesia coverage and minimize complications.

Methods: The implantation procedure described here is performed with a sleep-awake anesthetic regimen in a lateral position using anatomical landmarks and perioperative testing based on patient feedback. A single lead is subcutaneously implanted from behind the ear and across the back of the head, and the implantable pulse generator (IPG) is placed below the right clavicle.

Results: From March 2018 to June 2024, 45 CCH patients were implanted using this approach and followed up for a total of 86.3 patient years. A total of 22 adverse events (AEs) occurred in 17 patients, with nine AEs requiring revision surgery. Notably, no instances of lead migration, lead breakage, or muscle/neck stiffness were observed. Temporary occipital dysesthesia was the most frequent non-surgical AE, resolving spontaneously within weeks. The rate of serious adverse events (SAEs) was one per 9.6 patient years. Six patients had the ONS system explanted due to lack of efficacy.

Conclusions: The surgical approach described here in detail offers several advantages, with a favorable complication profile, satisfactory paresthesia coverage, and good perioperative patient comfort. Advances in the surgical technique are vital to both patients and healthcare providers, and we believe this approach is a valuable contribution toward improved patient outcomes and procedural efficiency.

Objectives: Artificial intelligence (AI) represents an exciting and evolving technology that is increasingly being utilized across pain medicine. Large language models (LLMs) are one type of AI that has become particularly popular. Currently, there is a paucity of literature analyzing the impact that AI may have on trainee education. As such, we sought to assess the benefits and pitfalls that AI may have on pain medicine trainee education. Given the rapidly increasing popularity of LLMs, we particularly assessed how these LLMs may promote and hinder trainee education through a pilot quality improvement project.

Materials and methods: A comprehensive search of the existing literature regarding AI within medicine was performed to identify its potential benefits and pitfalls within pain medicine. The pilot project was approved by UPMC Quality Improvement Review Committee (#4547). Three of the most commonly utilized LLMs at the initiation of this pilot study - ChatGPT Plus, Google Bard, and Bing AI - were asked a series of multiple choice questions to evaluate their ability to assist in learner education within pain medicine.

Results: Potential benefits of AI within pain medicine trainee education include ease of use, imaging interpretation, procedural/surgical skills training, learner assessment, personalized learning experiences, ability to summarize vast amounts of knowledge, and preparation for the future of pain medicine. Potential pitfalls include discrepancies between AI devices and associated cost-differences, correlating radiographic findings to clinical significance, interpersonal/communication skills, educational disparities, bias/plagiarism/cheating concerns, lack of incorporation of private domain literature, and absence of training specifically for pain medicine education. Regarding the quality improvement project, ChatGPT Plus answered the highest percentage of all questions correctly (16/17). Lowest correctness scores by LLMs were in answering first-order questions, with Google Bard and Bing AI answering 4/9 and 3/9 first-order questions correctly, respectively. Qualitative evaluation of these LLM-provided explanations in answering second- and third-order questions revealed some reasoning inconsistencies (e.g., providing flawed information in selecting the correct answer).

Conclusions: AI represents a continually evolving and promising modality to assist trainees pursuing a career in pain medicine. Still, limitations currently exist that may hinder their independent use in this setting. Future research exploring how AI may overcome these challenges is thus required. Until then, AI should be utilized as supplementary tool within pain medicine trainee education and with caution.

Introduction: Pain management in patients with complete spinal cord injury is complex.

Case report: We report a successful case of managing neuropathic, phantom limb, and back pain below the level of spinal cord injury (T5 American Spinal Injury Association [ASIA] A) using a 10 kHz high-frequency spinal cord stimulator (SCS) over a 6-month follow-up period.

Conclusion: The effectiveness of this approach may be attributed to its ability to modulate supraspinal pain processing, allowing for targeted relief of various pain mechanisms below the level of injury.

Background: Community reintegration is an important goal for people living with a spinal cord injury (SCI), and pain is suspected to limit reintegration due to its limitations in daily functioning, mood, and sleep.

Objectives: To determine the influence of pain on community reintegration in manual wheelchair users with SCI.

Methods: The Reintegration to Normal Living Index was used to determine community reintegration, while the DN4 and the Wheelchair User's Shoulder Pain Index were used to determine the presence of neuropathic and shoulder pain respectively. Associations and differences between the pain variables and participants with and without pain were analyzed with Spearman correlations and Mann-Whitney U-tests using SPSS v27 at 0.05 significance level and 95% confidence interval.

Results: Of the 122 participants, 85.2% reported current pain, with a 77.7% median for community reintegration. Neuropathic pain (53.3%) was more common and severe than nociceptive shoulder pain (14.8%). There was no significant difference in community reintegration between participants with and without pain, nor any correlation between the overall presence of pain and community reintegration. The severity of pain, particularly shoulder pain, was negatively associated with taking trips out of town (p < 0.01), and overall community reintegration (p < 0.05).

Conclusion: It is not the mere presence of pain that influences community reintegration, but rather the severity and the location of pain. Shoulder care and pain management need to be included in the rehabilitation program, as these are important considerations when rehabilitating people with SCI back into their communities.

Objectives: This single-arm, open-label, single-center observational pilot study assessed the safety and efficacy of ultrahigh-frequency dorsal root ganglia (UHF-DRG) stimulation in patients with chronic leg pain with or without low back pain. Such high-frequency electrostimulation had not been conducted in the human central nervous system previously.

Materials and methods: The primary objective was to evaluate the safety of UHF-DRG stimulation (2 Hz pulses with 50 msec pulse-width and 500 kHz intrapulse sine waves, 5-min duration per stimulation) by identifying incident adverse events (AE) and severe adverse events (SAE) during the trial. The secondary objectives included assessment of pain reduction using a numerical rating score (NRS), presence of paraesthesia, and changes in four pain medications (weak opioids, anticonvulsants, antidepressants, and non-steroid-anti-inflammatory drugs). One DRG lead was implanted for one day then removed, and the patients received maximal three times of UHF stimulation in total.

Results: The study focused on ten cases. Two of them did not complete the study due to difficulty of lead implantation. There was no SAE in this trial. Among the ten cases, AEs occurred in eight, three experienced injection-related local pain and one of them had a post-dural-puncture headache, others had symptoms un-related to implantation procedure or UHF stimulation. The average NRS was reduced from 6.4 ± 1.1 at baseline to 2.9 ± 1.1 on the second-day post-implantation, and it was striking that the NRS was maintained at 3.6 ± 2.8 until 2 days after lead removal. The results showed a trend of lower frequency in medication use for all types of analgesics.

Conclusions: In this first-in-human pilot study, we discovered that intermittent pulsed UHF-DRG stimulations ameliorated chronic lower limb pain for an extended period in humans. Our finding opens up a new neuromodulatory concept and may initiate a novel paradigm for treating intractable pain.

Background: Although long-term opioid therapy (LTOT) for chronic pain has declined, it remains common in the U.S. Providers do not have clinical practice guidelines for vulnerable LTOT patients, in whom both LTOT continuation and tapering to discontinuation pose risks of harm and in whom opioid use disorder (OUD) is absent.

Methods: To begin to meet the gap in guidelines, the study used a multiple case study approach. Five cases were constructed to systematically vary key elements of LTOT continuation and discontinuation harms among patients reporting LTOT's lack of efficacy (experience of pain and poor function). For each, treatment approaches were collected from 28 opioid safety experts identified through their participation in a national policy panel (19 were physicians) and analyzed using template analysis.

Results: For patients receiving LTOT with harms of continuation and discontinuation, experts recommended attempting a slow taper (even with a prior unsuccessful taper, possibly with adjuvant medications to manage withdrawal) and not maintaining opioid therapy. Experts considered switching to buprenorphine, especially if the patient had aberrant behaviors. They also considered adding non-opioid pain therapies (especially re-trying such therapies if they were unhelpful before) and engaging in shared decisionmaking, although with little consensus on specific approaches. Some experts would address co-occurring conditions related to patient safety (alcohol use, mental health symptoms, opioid side effects). Few experts referenced assessing or addressing OUD or overdose risk. In quantitative data, 36% of experts agreed LTOT is beneficial, 36% agreed most LTOT patients should be discontinued, and 57% agreed patients experience harm from tapering and from discontinuation.

Discussion: Evidence is needed to build on and test these experts' recommendations to attempt tapering and add non-opioid pain therapies for patients reporting harms of continued LTOT who may experience harms from tapering. Such evidence informs the development of clinical practice guidelines that provide comprehensive protocols to support the safety and functioning of this group of patients.

Introduction: The fields of anesthesiology and pain medicine are experiencing significant changes driven by market forces and professional preferences. While demand for anesthesiologists is rising, pain medicine is facing a decline in fellowship applications.

Methods: This study analyzed data from the Electronic Residency Application Service (ERAS) and the National Resident Matching Program (NRMP) from 2019 to 2023, focusing on trends in fellowship applications to pain medicine programs. Additionally, preliminary data from the 2024 match cycle were examined.

Results: There has been a notable decrease in anesthesiology residents applying to pain medicine fellowships, with applications dropping from 351 in 2019 to 193 in 2023. The overall decline in anesthesia-based applicants to pain medicine fellowships was 45%, signaling the highest detriment among anesthesiology applicants compared to other specialties. Gender disparities have been prevalent, with the absolute number of female applicants decreasing every year since 2019. Additionally, the 2023 match saw a significant number of unfilled programs, with 35 out of 115 programs failing to fill all positions. Preliminary data from the 2024 match cycle suggest this downward trend is continuing.

Conclusion: The decline in pain medicine fellowship applications, particularly among anesthesiology residents, signals potential future workforce shortages and challenges in patient care. Recruitment strategies should include early exposure to pain medicine during residency, enhanced mentorship programs, and robust recruitment efforts (including virtual options). Addressing these issues is essential to ensure enough trained specialists to meet the growing need for pain specialists nationally.

Introduction: Chronic pain (CP) affects 35.0%-51.3% of the UK population, with 67%-88% reporting sleep disturbances. Cannabis-based medicinal products (CBMPs) have shown therapeutic potential in managing CP. Evidence suggests poor sleep worsens pain perception; therefore, this study aimed to assess patient-reported outcome measures (PROMs) following CBMP treatment in CP patients with and without co-morbid sleep impairment.

Methods: A prospective cohort study of CP patients from the UK Medical Cannabis Registry was conducted. Participants were separated by baseline single-item sleep quality scale (SQS) score into sleep impaired (SQS ≤3) and unimpaired (SQS ≥4) cohorts. The primary outcome assessed changes in PROMs from baseline to 1-, 3-, 6-, and 12-months. Participants completed the following: SQS, General Anxiety Disorder-7, EQ-5D-5L, Brief Pain Inventory (BPI), and Short-Form McGill Pain Questionnaire-2. Significance was defined as p < 0.050.

Results: 1139 participants met the inclusion criteria (sleep impaired: n = 517, 45.4%; sleep unimpaired: n = 622, 54.61%). The sleep impaired cohort showed improvements in all PROMs at each follow-up (p < 0.010). The sleep unimpaired cohort showed similar results (p < 0.050), except in SQS and ED-5Q-5L: self-care and anxiety/depression scores (p > 0.050). However, the sleep impaired cohort observed greater improvements in BPI pain severity (p < 0.050) and SQS (p < 0.001) than the sleep unimpaired cohort at all follow-ups. 2817 adverse events were self-reported between both cohorts (p = 0.197).

Discussion: These findings align with literature that shows associated improvements in pain outcomes following CBMP administration. Sleep impaired individuals were more likely to experience greater pain severity improvements. However, this was not confirmed on multivariate logistic regression analysis and instead may be confounded by baseline pain severity.

Conclusion: Whilst these results show promise for the effects of CBMPs on CP, they must be examined within the limitations of the study design. These findings provide further evidence to support the design of subsequent randomized controlled trials to verify causality between CBMPs and pain outcomes.